KR20210070931A - Measurement method, management method, and method of manufacturing optical component - Google Patents

Abstract

Provided is a technology to properly manage the distance between an end unit of a first member layer and an end unit of a second member layer, which are included in an end unit area of a laminated body of the first member layer and the second member layer. In accordance with an embodiment of the present invention, a measuring method is a method for measuring an end unit area of the laminated body including the first member layer and the second member layer. The first member layer has a first end unit. The second member layer has a second end unit placed on the same side as the first end unit when viewed from a laminated direction of the first member layer and the second member layer in the laminated body. The end unit area is an area covering from the first end unit to the second end unit in the laminated body. Included are: an irradiation step to irradiate an inspection light to the end unit area; a detection step to detect the reflection light which is the inspection light reflected by the end unit area; and a calculation step to calculate the distance between the first end unit and the second end unit based on the results of detection of the reflection light.

Description

A measurement method, a management method, and a manufacturing method of an optical component TECHNICAL FIELD

The present invention relates to a measuring method, a management method and a manufacturing method of an optical component.

As described in Patent Document 1, a second member layer formed of a coating solution is formed on the first member layer (the sheet-like article of Patent Document 1), and a laminate of the first member layer and the second member layer is formed. The technique of obtaining is known.

[Patent Document 1] Japanese Patent Laid-Open No. 2000-24565

In the laminate of the first member layer and the second member layer, between the first end of the first member layer and the second end of the second member layer (the end on the same side as the first end of the first member layer) When the distance between the ends is deviated within a predetermined range, various problems arise. For example, as described in Patent Literature 1, when the second member layer is a coating layer formed by coating a coating liquid, if the distance between the ends is shifted within a predetermined range, in the process after coating layer formation, the coating liquid The coating liquid may protrude from this 1st member layer and contaminate other members (for example, a roller, the member which should be joined to a 1st member layer, etc.). Alternatively, when the laminate is a single component, when the distance between the ends is shifted within a predetermined range, the arrangement relationship between the first member layer and the second member layer is shifted from a desired state. Therefore, there arises concerns that the performance of the component as said laminated body cannot exhibit desired performance, or that the component cannot be properly put into another apparatus.

Therefore, in the laminate of the first member layer and the second member layer, there is a technique for appropriately managing the distance between the ends between the first end of the first member layer and the second end of the second member layer within a predetermined range. was being requested

Then, one object of the present invention is to appropriately manage the distance between the end of the first member layer and the end of the second member layer included in the end region of the laminate of the first member layer and the second member layer. It is to provide measurement methods and management methods. Another object of the present invention is to provide a method for manufacturing an optical component using the above management method.

A measuring method of one aspect of the present invention is a method of measuring an end region of a laminate including a first member layer and a second member layer, wherein the first member layer has a first end portion, and the second member layer has a second end positioned on the same side as the first end when viewed in a lamination direction of the first member layer and the second member layer in the laminate, and the end region is the second end region in the laminate A region extending from the first end to the second end, an irradiation step of irradiating inspection light to the end region, a detection step of detecting reflected light that is the inspection light reflected by the end region, and a detection result of the reflected light and calculating the distance between the first end and the second end.

In the above measurement method, inspection light is irradiated to the end region, and the reflected light is detected. Further, a distance between the first end and the second end is calculated based on the detection result of the reflected light. Since the distance between the first end and the second end is calculated based on the optical measurement result as described above, the distance between the first end and the second end can be more appropriately calculated.

The first member layer may be a resin film layer, and the second member layer may be a coating layer formed of an adhesive or an adhesive.

The inspection light may have a stripe pattern in which bright portions and dark portions are alternately arranged. In this case, it is possible to easily obtain a plurality of detection results in which the end regions are illuminated in multiple directions. Therefore, it is easy to detect a 1st edge part and a 2nd edge part.

The shape of the stripe pattern may fluctuate periodically. Accordingly, even if there is only one device for outputting the inspection light, various types of optical information of the end region can be obtained.

For example, the shape of the stripe pattern periodically fluctuates between the first pattern and the second pattern, and the extending directions of the bright part and the dark part in the second pattern are the bright part and the dark part in the first pattern. may be orthogonal to the extension direction of

The said laminated body is a long laminated body, and the said irradiation process and the said detection process may be performed, conveying the said laminated body in the elongate direction.

A management method according to another aspect of the present invention is a method for managing an end region of a laminate including a first member layer and a second member layer, wherein the first member layer has a first end portion, and the second member layer The layer has a second end positioned on the same side as the first end in a lamination direction of the first member layer and the second member layer in the laminate, and the end region is the above in the laminate. A region extending from the first end to the second end, an irradiation step of irradiating an inspection light to the end region, a detection step of detecting the reflected light that is the inspection light reflected by the end region, and the detection result of the reflected light a calculation step of calculating the distance between the first end portion and the second end portion based on the calculation step; and a determination step of determining whether the calculated distance is within a predetermined range.

In the management method, inspection light is irradiated to the end region and the reflected light is detected. Further, a distance between the first end and the second end is calculated based on the detection result of the reflected light. Since the distance between the first end and the second end is calculated based on the optical measurement result as described above, the distance between the first end and the second end can be more appropriately calculated. Since the determination step is performed based on the calculated distance between the first end and the second end, the distance between the first end and the second end can be appropriately managed.

The first member layer may be a resin film layer, and the second member layer may be a coating layer formed of an adhesive or an adhesive.

The inspection light may have a stripe pattern in which bright portions and dark portions are alternately arranged. In this case, it is possible to easily obtain a plurality of detection results in which the end regions are illuminated in multiple directions. Therefore, it is easy to detect a 1st edge part and a 2nd edge part.

The shape of the stripe pattern may fluctuate periodically. Accordingly, even if there is only one device for outputting the inspection light, various types of optical information of the end region can be obtained.

The shape of the stripe pattern periodically fluctuates between the first pattern and the second pattern, and the extending directions of the bright part and the dark part in the second pattern are the bright part and the dark part in the first pattern. It may be orthogonal to an extension direction.

Before the irradiation step, the method may further include a lamination step of laminating the second member layer on the lamination member having the first member layer or the first member layer.

In the said lamination process, you may laminate|stack the said 2nd member layer on the said 1st member by coating a coating material on the said 1st member layer.

When the calculated distance does not fall within the predetermined range, in the lamination step, further comprising a changing step of changing a coating region of the coating material, the lamination process is performed until the calculated distance falls within the predetermined range. You may repeat the process, the said irradiation process, the said detection process, and the said determination process. Thereby, the laminated body in which the distance between a 1st edge part and a 2nd edge part is a predetermined range can be obtained more reliably.

The said laminated body is a long laminated body, The said lamination|stacking process, the said irradiation process, and the said detection process may be performed, conveying the said laminated body in the elongate direction.

A method of manufacturing an optical component according to another aspect of the present invention is a manufacturing method of an optical component including the management method according to the present invention.

According to one aspect of the present invention, a measuring method for appropriately managing the distance between the end of the first member layer and the end of the second member layer included in the end region of the laminate of the first member layer and the second member layer and management methods. According to another aspect of this invention, the manufacturing method of the optical component using the said management method can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the management method which concerns on one Embodiment.
2 is a diagram illustrating a first pattern that is an example of a stripe pattern.
3 is a diagram illustrating a second pattern that is another example of a stripe pattern.
4 is a flowchart of a management method according to an embodiment.
5 is a diagram showing the configuration of a retardation plate (optical component) manufactured in the second embodiment.
FIG. 6 is a view for explaining a process included in the method of manufacturing the retardation plate shown in FIG. 5 .
FIG. 7 is a view for explaining a process after the process shown in FIG. 6 .
FIG. 8 is a view for explaining a process after the process shown in FIG. 7 .
9 is a view for explaining a case in which the manufacturing method of the retardation plate shown in FIG. 5 is performed in a roll-to-roll manner.
It is a figure for demonstrating an example of the change method of a coating area|region.
It is a figure which shows the imaging result of a film edge part (1st edge part) and a coating edge part (2nd edge part).
It is a figure which shows the other imaging result of a film edge part (1st edge part) and a coating edge part (2nd edge part).
13 is a diagram for explaining Modification Example 1. FIG.
14 is a diagram for explaining a second modification.
15 is a diagram for explaining a third modification.
16 is a diagram for explaining a third modification.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings. The same reference numerals are assigned to the same elements, and overlapping descriptions are omitted. The dimensional proportions in the drawings do not necessarily correspond to those described.

As shown in FIG. 1 , the end (first end) 102a of the first member layer 102 included in the laminate 100 and the end (first end) 102a of the second member layer 104 in the laminate 100 ( A method of managing the distance (distance between ends) D1 between 104a) (second ends) will be described as a first embodiment. After that, an example using the management method described in the first embodiment will be described as a second embodiment, giving examples of the first member layer 102 and the second member layer 104 . Hereinafter, for convenience of explanation, as shown in FIG. 1 , the lamination direction of the first member layer 102 and the second member layer 104 is referred to as a z direction, and a direction orthogonal to the z direction is referred to as an x direction. call it

(First embodiment)

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the management method which concerns on one Embodiment. The laminate 100 shown in FIG. 1 has a first member layer 102 and a second member layer 104 . The second member layer 104 is laminated on the first member layer 102 . The first member layer 102 and the second member layer 104 may be, for example, members formed of an optically transparent material. For example, the first member layer 102 is a resin film layer, and the second member layer 104 is a coating layer formed of a coating material (eg, an adhesive or an adhesive). Examples of the first member layer 102 and the second member layer 104 will be described in detail in other embodiments.

In the management method according to the first embodiment, the end portion 102a among the both ends of the first member layer 102 in the x direction and the end portion 104a among the both ends of the second member layer 104 in the x direction. Manage the distance D1 between them. The end portion 104a is located on the same side as the end portion 102a when viewed in the stacking direction (z direction) of the first member layer 102 and the second member layer 104 among both ends of the second member layer 104 . is the end that When the second member layer 104 is a coating material, the length of the second member layer 104 in the x direction is shorter than the length of the first member layer 102 . Depending on the second member layer 104 (eg, a resin film, etc.), the length of the second member layer 104 in the x direction may be longer than the length of the first member layer 102 .

In the management method, the distance D1 is measured using a reflection optical system 106 as shown in FIG. 1 . The reflection optical system 106 includes a light source unit 108 and an imaging unit 110 . The end region A1 is a region near the end in the x-direction of the laminate 100 . Specifically, it is a region extending from the end 102a to the end 104a.

The light source unit 108 outputs the inspection light L1 toward the end region A1 of the laminate 100 . An example of the wavelength of the inspection light L1 depends on the material of the first member layer 102 and the second member layer 104, and may be any wavelength at which an image of the end region A1 can be acquired. An example of the wavelength of the inspection light L1 is a white LED light source having a peak wavelength at 450±30 nm. The inspection light L1 may be configured to illuminate the end region A1 in a planar shape, for example.

The imaging unit 110 is a photodetector that detects the reflected light L2 that is the inspection light L1 reflected by the end region A1. The imaging unit 110 is, for example, a two-dimensional sensor such as a CCD camera or a CMOS camera.

The imaging unit 110 inputs image data to the image processing apparatus 114 . The image processing apparatus 114 creates an image of the end area A1 based on the image data input from the imaging unit 110 . The image processing apparatus 114 has a display function of displaying the created image to the user. The image processing apparatus 114 may have a function of analyzing the created image to detect the end portions 102a and 104a, and a function of calculating the distance D1. The image processing apparatus 114 may have at least one of a function of controlling the imaging timing of the imaging unit 110 and a function of controlling the output of the inspection light L1 of the light source unit 108 . The image processing apparatus 114 may be, for example, a dedicated apparatus for implementing the management method according to the first embodiment. Alternatively, a program for implementing the management method including the image processing may be executed in the personal computer, and the personal computer may function as the image processing apparatus 114 .

An example of the light source unit 108 will be described. The light source unit 108 may be configured to output the inspection light L1 having a stripe pattern 112 in which the bright portions 112a and the dark portions 112b are alternately arranged, as shown in FIGS. 2 and 3 . The X direction in FIG. 2 shows the extending direction of the bright part 112a and the dark part 112b in FIG. 2, The Y direction is a direction orthogonal to the X direction. The X and Y directions in FIG. 3 are the same as the X and Y directions in FIG. 2 .

The shape (pattern shape) of the stripe pattern 112 may be changed. For example, in FIGS. 2 and 3, the bright part 112a (or the dark part 112b) moves in the direction of the arrow in FIGS. 2 and 3, or the width of the bright part 112a (or the dark part 112b) fluctuates, or Thus, the shape of the stripe pattern 112 may be changed.

In addition, the light source unit 108 refers to the stripe pattern 112 shown in FIG. 2 as a first pattern 112A and the stripe pattern 112 shown in FIG. 3 as a second pattern 112B. You may be comprised so that it may change periodically between the 1st pattern 112A and the 2nd pattern 112B. As for the 2nd pattern 112B, the extending direction of the bright part 112a and the dark part 112b in the 2nd pattern 112B is the extension of the bright part 112a and the dark part 112b in the 1st pattern 112A. The pattern is orthogonal to the direction. Even when it fluctuates periodically between the 1st pattern 112A and the 2nd pattern 112B, in each of the 1st pattern 112A and the 2nd pattern 112B, the bright part 112a (or the dark part 112b) ) may move in the arrow direction of FIGS. 2 and 3, and the width of the bright part 112a (or the dark part 112b) may fluctuate.

When the inspection light L1 has the stripe pattern 112, the light source unit 108 includes, for example, a light source in which a plurality of point light sources (eg, LEDs) are two-dimensionally arranged, and the lighting state of each LED. It may be provided with a control device for controlling the. In this case, the bright part 112a and the dark part 112b can be formed by controlling the lighting state of a some LED with a control apparatus. Moreover, the stripe pattern 112 formed by the bright part 112a and the dark part 112b can be varied.

The light source unit 108 may output, for example, a planar inspection light L1 having no bright portion 112a and dark portion 112b as shown in FIGS. 2 and 3 . In this case, the light source unit 108 may be a surface light source or a light source in which a plurality of point light sources (eg, LEDs) are two-dimensionally arranged. In the following description, the "planar inspection light L1" means a state in which the bright portion 112a and the dark portion 112b are not provided as described above.

The shape of the stripe pattern 112 may be controlled, for example, by the image processing apparatus 114 (see FIG. 1 ). In this case, the image processing apparatus 114 may control the light source unit 108 and the imaging unit 110 to synchronize them.

4 is a flowchart of an example of a management method. Using FIG. 4, the case where the 1st member layer 102 is a long resin film, and the 2nd member layer 104 is the coating layer formed from the coating material is illustrated, and a management method is demonstrated.

As shown in FIG. 4 , the second member layer 104 is laminated on the first member layer 102 (lamination step S01). The 2nd member layer 104 can be formed, for example by coating the coating material which should become the 2nd member layer 104, conveying the 1st member layer 102 in the elongate direction. Coating of a coating material can be implemented by gravure coating, for example.

Next, the distance D1 (refer FIG. 1) is measured by the measuring method which concerns on one Embodiment, conveying the 1st member layer 102 (measurement process S02).

In the measurement process S02, the inspection light L1 is irradiated toward the end area|region A1 of the laminated body 100 (irradiation process S02a). The reflected light L2 from the end region A1 is detected by the imaging unit 110 (detection step S02b). The distance D1 is calculated based on the image (detection result) of the end area|region A1 obtained by this (calculation process S02c). Specifically, the end portion 102a and the end portion 104a are specified based on the image obtained by the imaging unit 110, and the distance therebetween is calculated. The image processing apparatus 114 may perform the specification of the end portions 102a and 104a and the calculation of the distance D1 based thereon, or the user may perform the user based on the image created by the image processing apparatus 114 . . When the inspection light L1 periodically fluctuates between the first pattern 112A and the second pattern 112B, for example, the image processing apparatus 114 performs the first pattern 112A and the second pattern 112B, respectively. One image is created using the image data obtained for the reflected light L2 in the case of . In order to obtain the single image, for example, the image processing apparatus 114 may control the shape change timing of the stripe pattern 112 and the imaging timing of the imaging unit 110 .

After the measurement step S02, it is determined whether the distance D1 is within a predetermined range (determination step S03). The determination may be made by the user or by comparing the distance D1 with a predetermined range that the image processing apparatus 114 has input in advance.

In the determination step S03, when it is determined that the distance D1 is within the predetermined range (YES in the determination step S03), the production of the laminate 100 is performed under the same conditions as until the determination step S03 is performed. Just keep going.

On the other hand, when it is determined in the determination step S03 that the distance D1 is outside the predetermined range (No in the determination step S03), in the lamination step S01, the lamination conditions in the lamination step S01 (specifically, the first Changing process S04 which changes the coating area|region of the coating material for forming the 2 member layer 104) is implemented.

When the change process S04 is implemented, the lamination process S01, the measurement process S02, the determination process S03, and the change process S04 are performed until it is determined in the determination process S03 that the distance D1 is within a predetermined range.

By implementing the said management method, the distance D1 between the edge part 102a and the edge part 104a in the laminated body 100 can be appropriately managed in a predetermined range.

For example, in the form in which the second member layer 104 is the coating layer and the coating material forming the coating layer is an adhesive or an adhesive, a pair of nip rollers is used to attach the second member to the first member layer 102 . In some cases, other members are joined through the layer 104 . In this case, the predetermined range of the normal distance D1 is set so as to prevent contamination of each nip roller due to the coating material protruding into the pair of nip rollers. Accordingly, by managing the distance D1 within the predetermined range, it is possible to reliably prevent contamination of each nip roller. As a result, a product obtained by bonding other members to the first member layer 102 via the second member layer 104 can be efficiently manufactured.

The case where the distance D1 between the edge part 102a and the edge part 104a contained in the edge part area|region A1 was measured and managed was demonstrated. However, as shown in FIG. 1 , the distance between the end portion 102b and the end portion 104b included in the end region A2 (the region spanning the end portion 102b to the end portion 104b) of the laminate 100 . (Distance between ends) (D2) may be measured and managed in the same manner. In this case, the reflection optical system 106 is also disposed on the end 104b side. The end portion 102b of the first member layer 102 is an end opposite to the end portion 102a in the x direction. The end 104b of the second member layer 104 is an end opposite to the end 104a in the x direction. In FIG. 1 , when viewed in the z direction, the light source unit 108 and the imaging unit 110 are arranged along the x direction. However, the arrangement state of the light source unit 108 and the imaging unit 110 is not limited to the form of FIG. 1 . The light source unit 108 and the imaging unit 110 may be arranged, for example, along a direction orthogonal to the x direction and the z direction.

When measuring and managing both the distance D1 and the distance D2, you may carry out these simultaneously. Furthermore, if at least one of the distance D1 and the distance D2 is outside the predetermined range set for each of the distance D1 and the distance D2 in the determination step S03, the change step S04 shown in FIG. 4 is performed do.

(Second embodiment)

The manufacturing method of the optical component using the management method demonstrated in 1st Embodiment is demonstrated. 5 is a schematic diagram of a retardation plate (optical component) 2 manufactured by the manufacturing method according to the second embodiment. Also in the second embodiment, for convenience of explanation, the x-direction and the z-direction shown in Fig. 5 may be used in some cases as in the case of the first embodiment.

The retardation plate 2 has a resin film 11 , an alignment film 12 , a first retardation layer 13 , an adhesive layer 22 , and a second retardation layer 33 . The retardation plate 2 is an optical component (or optical element) that imparts a certain retardation to the light incident on the retardation plate 2 by the first retardation layer 13 and the second retardation layer 33 . The retardation plate 2 can be used for a part of a circularly polarizing plate for optical compensation, for example, in an image display device such as a liquid crystal image display device and an organic EL image display device. The form in which the 1st retardation layer 13 and the 2nd retardation layer 33 are hardened|cured material of a polymeric liquid crystal compound is demonstrated.

The resin film 11 is a support for supporting the alignment film 12 , the first retardation layer 13 , the adhesive layer 22 , and the second retardation layer 33 . Examples of the material of the resin film 11 include triacetyl cellulose (TAC), polyethylene terephthalate (PET), and polycycloolefin (COP). Examples of the thickness of the resin film 11 are 20 µm to 120 µm. Examples of the length of the resin film 11 in the x direction are 500 mm to 2000 mm.

The alignment film 12 is laminated on the resin film 11 . In the form shown in FIG. 5 , the length of the alignment film 12 in the x direction is shorter than the length of the resin film 11 .

The thickness of the alignment film 12 is usually in the range of 0.01 µm to 10 µm, preferably in the range of 0.05 µm to 5 µm, and more preferably in the range of 0.1 µm to 3 µm.

Examples of the alignment layer 12 are a vertical alignment layer, a horizontal alignment layer, or an alignment layer for tilting the molecular axis of the polymerizable liquid crystal compound, and may be selected according to the first retardation layer 13 . The material of the alignment film 12 is not limited as long as it is a resin used as a known material used for the retardation plate. For example, as the alignment layer 12 , a cured product obtained by curing a conventionally known monofunctional or polyfunctional (meth)acrylate-based monomer under a polymerization initiator may be used.

The first retardation layer 13 is a layer that imparts a predetermined retardation to the light incident on the first retardation layer 13 . The first retardation layer 13 is a cured product of a polymerizable liquid crystal compound as described above. In the form shown in FIG. 5 , the length of the first retardation layer 13 in the x direction is shorter than the length of the resin film 11 and longer than the length of the alignment film 12 . Accordingly, both ends of the alignment film 12 in the x direction are covered with the first retardation layer 13 . An example of the thickness of the first retardation layer 13 is usually 0.2 µm to 3 µm, preferably 0.2 µm to 2 µm.

The adhesive layer 22 is provided on the first retardation layer 13 , and is a layer for bonding the first retardation layer 13 and the second retardation layer 33 . The material of the adhesive layer 22 is an adhesive or an adhesive. The adhesive or pressure-sensitive adhesive may be a material known in the art related to the present disclosure. Examples of the adhesive include active energy ray-curable adhesives such as ultraviolet (UV) curing resins, and water-based adhesives, such as aqueous polyvinyl alcohol-based resin solutions. Examples of the pressure-sensitive adhesive include a pressure-sensitive adhesive composition containing (meth)acrylic resin, rubber-based resin, urethane-based resin, ester-based resin, silicone-based resin, polyvinyl ether-based resin, and the like as a main component. Hereinafter, the case where the adhesive agent which forms the adhesive layer 22 is an active energy ray hardening type adhesive agent, such as UV curable resin, is demonstrated.

The length of the adhesive layer 22 in the x direction is shorter than the length of the first retardation layer 13 . Examples of the thickness of the adhesive layer 22 are 0.1 µm to 10 µm, preferably 0.5 µm to 5 µm, and more preferably 1 µm to 3 µm.

The second retardation layer 33 is a layer that imparts a predetermined retardation to the light incident on the second retardation layer 33 . As described above, the second retardation layer 33 is a cured product of a polymerizable liquid crystal compound. In the retardation plate 2 shown in FIG. 5 , the length of the second retardation layer 33 in the x direction is the same as the length of the adhesive layer 22 . An example of the thickness of the second retardation layer 33 is usually 0.2 µm to 3 µm, and preferably 0.2 µm to 2 µm.

The outline of the manufacturing method of the phase difference plate 2 is demonstrated using FIGS. When manufacturing the retardation plate 2, the 1st optical laminated body 10 and the 2nd optical laminated body 30 shown in FIG. 6 are prepared. The 1st optical laminated body 10 and the 2nd optical laminated body 30 extend in the direction orthogonal to the x direction and the z direction. 6-8 is a schematic diagram of the cross section orthogonal to the elongate direction of the 1st optical laminated body 10 and the 2nd optical laminated body 30. As shown in FIG.

The first optical laminate 10 is a laminated member in which a resin film 11 , an alignment film 12 , and a first retardation layer 13 are laminated. The resin film 11 , the alignment film 12 , and the first retardation layer 13 extend in the long direction of the first optical laminate 10 . Therefore, the 1st optical laminated body 10 is a long lamination|stacking member.

The first optical laminate 10 illustrated in FIG. 6 may be manufactured by sequentially forming the alignment layer 12 and the first retardation layer 13 on the resin film 11 . The orientation film 12 can be formed by, for example, coating a material for the orientation film 12 on the resin film 11 and curing the coating film. The first phase difference layer 13 can be formed by, for example, coating a material for the first phase difference on the resin film 11 on which the alignment film 12 is formed, and curing the coating film. On the resin film 11, the relationship between the lengths of the orientation film 12 and the 1st retardation layer 13 in the x direction is the same as that demonstrated using FIG.

The second optical laminate 30 illustrated in FIG. 6 is a laminated member in which a resin film 31 , an alignment film 32 , and a second retardation layer 33 are laminated. The 2nd optical laminated body 30 is a long lamination|stacking member similarly to the 1st optical laminated body 10. The example of the resin film 31 is the same as that of the resin film 11 . The material of the resin film 31 may be the same as or different from the material of the resin film 11 . The alignment layer 32 is an alignment layer along the second retardation layer 33 . The relationship between the lengths in the x direction of the resin film 31 , the alignment film 32 , and the second retardation layer 33 is the resin film 11 , the alignment film 12 , and the first optical laminate 10 that the first optical laminate 10 has. It is the same as the relationship of the length of the retardation layer 13 in the x direction. Accordingly, the length of the second retardation layer 33 of the second optical laminate 30 in the x direction is longer than the length of the second retardation layer 33 of the retardation plate 2 shown in FIG. 5 .

After preparing the first optical laminate 10 and the second optical laminate 30 , the coating layer 20 is formed by coating an adhesive on the first retardation layer 13 . Next, the first optical laminate 10 and the second optical laminate 30 are overlapped through the coating layer 20 so that the coating layer 20 and the second retardation layer 33 are in contact. Thereby, the laminated body 4 shown in FIG. 7 can be obtained.

Thereafter, the coating layer 20 is irradiated with active energy rays such as ultraviolet rays to cure the adhesive forming the coating layer 20 . Thereby, the 1st optical laminated body 10 and the 2nd optical laminated body 30 are bonded through the adhesive layer 22 which is the hardened|cured material of the coating layer 20. As shown in FIG.

After bonding the 1st optical laminated body 10 and the 2nd optical laminated body 30, as shown in FIG. 8, the resin film 31 is peeled from the 1st optical laminated body 10, and the retardation plate ( 2) is obtained.

The bonding force of the adhesive layer 22 to the second retardation layer 33 is set to be stronger than the bonding force of the alignment layer 32 to the second retardation layer 33 . Moreover, the length of the adhesive layer 22 in the x direction is shorter than the length of the second retardation layer 33 in the x direction, and the second retardation layer 33 is also bonded to the resin film 31 . Accordingly, when the resin film 31 is peeled off, as shown in FIG. 8 , the portion outside the adhesive layer 22 in the x direction of the second retardation layer 33 and the alignment film 32 are also the resin film 31 . ) and peeled from the first optical laminate 10 .

Hereinafter, when peeling the resin film 31 from the 1st optical laminated body 10 for convenience of description, the member which arises separately from the retardation plate 2 is called the peeling member 6 .

In 2nd Embodiment, the management method demonstrated in 1st Embodiment is implemented by making the resin film 11 into the 1st member layer 102, and making the coating layer 20 into the 2nd member layer 104. A management method applied to the manufacturing method will be described with reference to FIGS. 4 and 6 .

As shown in FIG. 6 , the resin film 11 corresponds to the first member layer 102 , and the coating layer 20 corresponds to the second member layer 104 . Therefore, the end portions 11a and 11b of the resin film 11 correspond to the end portions 102a and 102b, respectively, and the end portions 20a and 20b of the coating layer 20 are the end portions ( 104a) and the end 104b. Further, the distance D1a between the end portions 11a and 11b corresponds to the distance D1, and the distance D2a between the end portions 20a and 20b corresponds to the distance D2.

The process of forming the coating layer 20 shown in FIG. 6 corresponds to the lamination|stacking process S01 shown in FIG. After the process of forming the coating layer 20 (lamination process S01), by implementing the measurement process S02 shown in FIG. 4, the edge part 11a of the resin film 11 and the edge part 20a of the coating layer 20 Measure the distance D1a. In 2nd Embodiment, the distance D2a of the edge part 11b of the resin film 11 and the edge part 20b of the coating layer 20 is also measured.

Next, the determination step S03 shown in Fig. 4 is executed to determine whether the distances D1a and D2a are predetermined ranges set for each of the distances D1a and D2a, respectively. The predetermined ranges corresponding to each of the distances D1a and D2a may be the same or different.

When it is determined in the determination step S03 that the distance D1a and the distance D2a are within the corresponding predetermined ranges, the same adhesive coating conditions (specifically) as those in the case where the measured coating layer 20 is formed. continues the manufacture of the retardation plate 2 with the same coating area). On the other hand, when it is determined in the determination step S03 that at least one of the distance D1a and the distance D2a is outside the corresponding predetermined range, the changing step S04 is performed to change the adhesive coating area (lamination condition) do.

When the change step S04 is performed, the lamination step S01 to the change step S04 are repeated until it is determined in the determination step S03 that the distance D1a and the distance D2a are both within the corresponding predetermined range.

An example of the manufacturing method of the retardation plate 2 to which the management method demonstrated in 1st Embodiment is applied using FIG. 9 is demonstrated in more detail. Hereinafter, a case in which the retardation plate 2 is manufactured using a roll-to-roll method as shown in FIG. 9 will be described.

The roll-shaped 1st optical laminated body 10 and the roll-shaped 2nd optical laminated body 30 are set in the unwinding part 40a and the unwinding part 40b. The 1st optical laminated body 10 is conveyed in the elongate direction of the 1st optical laminated body 10 toward a pair of nip roller 44 with the conveyance roller 42. Similarly, the 2nd optical laminated body 30 is conveyed in the elongate direction of the 2nd optical laminated body 30 toward a pair of nip roller 44 with the conveyance roller 42. Since the pair of nip rollers 44 also contribute to conveyance of the 1st optical laminated body 10 and the 2nd optical laminated body 30, the pair of nip roller 44 is also a conveyance roller.

The product which the 1st optical laminated body 10 has by the coating apparatus 50 arrange|positioned on the conveyance path|route of the 1st optical laminated body 10 from the unwinding part 40a to a pair of nip roller 44 1 An adhesive agent is coated on the phase difference layer 13, and the coating layer 20 is formed (corresponding to lamination|stacking process S01 of FIG. 4).

The coating device 50 has an adhesive supply part 52 and a coating roller 54 . The adhesive supply part 52 is a supply source of adhesive to the surface of the coating roller 54 . The coating roller 54 is a roller which applies an adhesive agent to the 1st retardation layer 13 of the 1st optical laminated body 10 being conveyed. An example of the coating roller is a gravure roller.

When applying an adhesive agent with the coating apparatus 50, the 1st optical laminated body 10 (specifically, the 1st retardation layer 13) and the coating roller 54 contact with the coating area adjuster 60 Adjust the area. 10 : is a figure which shows an example of the coating area adjuster 60. As shown in FIG. In FIG. 10, the 1st optical laminated body 10 is shown typically as a film of one sheet. In FIG. 10 , the long direction of the first optical laminate 10 is the conveyance direction of the first optical laminate 10 .

The coating area adjuster 60 has a pair of claw parts 62 spaced apart along the conveyance direction of the 1st optical laminated body 10, and the support part 64 which supports the pair of claw parts 62. As shown in FIG. The coating area adjuster 60 is arrange|positioned so that a pair of hook part 62 may contact|connect the coating side of the adhesive agent in the 1st optical laminated body 10. As shown in FIG. By moving the coating area adjuster 60 in the width direction (direction orthogonal to the long direction) of the first optical laminate 10 , between the pair of claws 62 in the first optical laminate 10 . Contact of the area with the coating roller 54 is avoided. Therefore, the coating area|region of an adhesive agent is adjusted by adjusting the position of the coating area|region adjuster 60 in the width direction of the 1st optical laminated body 10. As shown in FIG. 9 and 10, the case where the coating area|region adjuster 60 is arrange|positioned in the one edge part side in the width direction of the 1st optical laminated body 10 is illustrated. However, in the manufacturing method of the retardation plate 2 demonstrated using FIG. 9, the coating area|region adjuster 60 is arrange|positioned also in the other edge part side in the width direction of the 1st optical laminated body 10. As shown in FIG. 9 schematically shows a pair of claw portions 62 of the coating area adjuster 60 .

Returning to FIG. 9, the process after an adhesive agent is coated to the 1st optical laminated body 10 by the coating apparatus 50 is demonstrated. As shown in FIG. 9 , the first optical laminate 10 to which the adhesive is applied is conveyed between a pair of nip rollers 44 . In FIG. 9, the area|region between the coating apparatus 50 and the nip roller 44 WHEREIN: The coating layer 20 formed on the 1st optical laminated body 10 is shown for description.

The second optical laminate 30 is conveyed together with the first optical laminate 10 to the pair of nip rollers 44 . At this time, the second retardation layer 33 of the second optical laminate 30 faces the coating layer 20 , and at the same time, the width of the first optical laminate 10 and the second optical laminate 30 . The conveyance path|route of the 1st optical laminated body 10 and the 2nd optical laminated body 30 is adjusted so that the center in a direction may correspond.

The 1st optical laminated body 10 and the 2nd optical laminated body 30 sent to a pair of nip rollers 44 are pressed in the thickness direction by a pair of nip rollers 44, and the coating layer 20 ) through which it is tentatively joined.

The laminated body 4 of the 1st optical laminated body 10 and the 2nd optical laminated body 30 sent out from a pair of nip roller 44 is the 1st optical laminated body 10 and the 2nd optical laminated body It is conveyed in the long direction of (30).

In the conveyance direction of the 1st optical laminated body 10 and the 2nd optical laminated body 30, downstream of the pair of nip rollers 44 (rear end of the pair of nip rollers 44), an active energy ray irradiation part (56) is arranged. The active energy ray irradiation unit 56 irradiates an active energy ray to the laminate 4 to cure the coating layer 20 . Thereby, the adhesive layer 22 as a hardened|cured material of an adhesive agent is formed, and the 1st optical laminated body 10 and the 2nd optical laminated body 30 are bonded.

In the conveyance direction of the said laminated body 4 WHEREIN: By the peeling roller 46 arrange|positioned downstream of the active energy ray irradiation part 56 (rear end of the active energy ray irradiation part 56), from the said laminated body 4 The resin film 31 which the 2nd optical laminated body 30 has is peeled. Thereby, the retardation plate 2 and the peeling member 6 are separated from the laminated body 4 . Since the peeling roller 46 also contributes to conveyance of the laminated body 4, the retardation plate 2, and the peeling member 6, the peeling roller 46 is also a conveyance roller.

What is necessary is just to wind up the obtained retardation plate 2 in roll shape by a winding part, for example. The peeling member 6 may be discarded as it is, or may be discarded after being wound up in a roll shape by a winding part once.

In the manufacturing method illustrated in FIG. 9, the process of forming the coating layer 20 on the 1st optical laminated body 10 with the coating apparatus 50 respond|corresponds to the lamination|stacking process S01 shown in FIG. In addition, in the conveyance path|route of the 1st optical laminated body 10 WHEREIN: Between the coating apparatus 50 and a pair of nip roller 44 (for example, the position shown by arrow α1 or arrow α1), in FIG. The illustrated reflection optical system 106 is disposed. The distance D1a and the distance D2a of the 1st optical laminated body 10 being conveyed are measured using this reflection optical system 106 (measurement process S02 of FIG. 4).

In measurement process S02, as schematically shown by arrow alpha 1 of FIG. 9, distance D1a and distance D2a in the area|region between the conveyance rollers 42 and 42 among the 1st optical laminated bodies 10 are measured. may do Or you may measure distance D1a and distance D2a in the area|region located on the conveyance roller 42 among the 1st optical laminated bodies 10 as schematically shown by arrow (alpha)2. You may measure from the opposite side to the coating layer 20 in the measurement in between conveyance rollers like arrow (alpha)1. Here, although the case of the measurement at the position of arrow (alpha)1 was demonstrated, it is the same also in the measurement between conveyance rollers.

When the inspection light L1 output from the light source unit 108 of the reflection optical system 106 is a stripe pattern 112 as shown in FIGS. 2 and 3 , for example, X shown in FIGS. 2 and 3 . The direction or the Y direction may be set as the conveying direction of the first optical laminate 10 .

When the inspection light L1 is a striped pattern 112 that is periodically changed in a plurality of patterns (eg, periodically fluctuates between the first pattern 112A and the second pattern 112B), the first pattern ( 112A) and the fluctuation period of the second pattern 112B, and the imaging speed of the imaging unit may be set in consideration of the conveying speed of the first optical laminate 10 . Specifically, while the stripe pattern 112 is changed a certain number of times between a plurality of patterns, the stripe pattern 112 is such that an image of substantially the same area in the first optical laminate 10 being conveyed can be acquired. ) and the imaging speed of the imaging unit can be set.

After measuring the distance D1a and the distance D2a, determination process S03 is implemented. In the determination step S03, when it is determined that both the distance D1a and the distance D2a are within the corresponding predetermined ranges, the manufacture of the retardation plate 2 is continued.

On the other hand, when it is determined in the determination step S03 that at least one of the distance D1a and the distance D2a is outside the corresponding predetermined range, the coating area of the adhesive is adjusted using the coating area adjuster 60 . A change step S04 is performed. The coating area|region of an adhesive agent is changed by adjusting the position of the position adjuster in the width direction of the 1st optical laminated body 10 specifically,. When changing process S04 is implemented, it is determination process S03. WHEREIN: The process of applying an adhesive agent on the 1st optical laminated body 10 until it determines with distance D1a and distance D2a being within predetermined ranges. (Lamination process S01), measurement process S02 and determination process S03 shown in FIG. 4, and said change process S04 are repeated.

As shown in FIG. 9, when the 1st optical laminated body 10 and the 2nd optical laminated body 30 are pressed with a pair of nip rollers 44, and these are joined, distance D1a and distance D2a ) is set so that the adhesive forming the coating layer 20 does not contact the nip roller 44 and the nip roller 44, and at the same time, the first optical laminate 10 and When peeling the peeling member 6 (refer FIG.8 and FIG.9) from the laminated body 4 of the 2nd optical laminated body 30, it is set so that a desired structure can be acquired as the retardation plate 2 .

Therefore, for example, when the distance D1a and the distance D2a are outside the predetermined ranges set for each, there is a fear that, for example, an adhesive may adhere to the nip roller 44 and contaminate the two nip rollers 44 . Or, when peeling the peeling member 6 from the said laminated body 4, there exists a possibility that the site|part to be peeled may remain|survive on the retardation plate 2 side which should become a product.

On the other hand, in the manufacturing method of the said retardation plate 2, the management method demonstrated in 1st Embodiment is implemented. In the measurement process S02 of the management method, the distance D1a and the distance D2a are calculated using the image optically acquired using the reflection optical system 106 shown in FIG. Therefore, while conveying the 1st optical laminated body 10, the distance D1a and the distance D2a can be computed efficiently and accurately. Accordingly, it is possible to appropriately determine whether each of the distance D1a and the distance D2a is a corresponding predetermined range.

When at least one of distance D1a and distance D2a exists outside a predetermined range, change process S04 which changes the coating area|region of an adhesive agent is implemented. Further, in the determination step S03, the changing step S04 is performed until both the distance D1a and the distance D2a are within a predetermined range. Accordingly, each of the distance D1a and the distance D2a can be set within a corresponding predetermined range. As a result, the problem that the adhesive adheres to the nip roller 44 as described above can be prevented. In this case, since the maintenance of the nip roller 44 due to, for example, adhesion of the adhesive can be avoided, the manufacturing efficiency of the retardation plate 2 is improved. Since the distance D1a and the distance D2a can be set within a predetermined range, it is also possible to prevent the problem that the portion to be peeled remains on the side of the retardation plate 2 that is to be a product. Therefore, manufacture of the retardation plate 2 as a defective product is avoided, and as a result, the manufacturing yield of the retardation plate 2 improves.

When the management method is implemented, an example of the inspection light L1 output from the light source unit 108 may be the inspection light L1 having the stripe pattern 112 described in the first embodiment, or the planar inspection light ( L1) may be sufficient. In the inspection light L1 of the planar shape and the inspection light L1 of the stripe pattern 112, for example, the inspection light L1 with respect to the extending direction of the end (or the end) is higher than in the case of using the line-shaped inspection light. The angular dependence of the irradiation area can be reduced, and the positions of the ends 11a and 20a and the ends 11b and 20b are easy to detect. Moreover, when the inspection light L1 has the stripe pattern 112, it is possible to acquire multiple images illuminating the end regions in multiple directions at once. Therefore, it is easy to detect the edge part 11a and the edge part 20a, and the edge part 11b and the edge part 20b. By periodically changing the shape of the stripe pattern 112 as indicated by arrows in FIGS. 2 and 3 or periodically changing between the first pattern 112A and the second pattern 112B, one A plurality of pieces of imaging information can be acquired by the reflective optical system 106 . Therefore, even if an optically transparent member such as the resin film 11 and the coating layer 20 used for the retardation plate 2 is imaged, the edge part 11a and the edge part 20a, and the edge part 11b and the edge part 20b ) is easier to detect more reliably.

11 : is a figure which shows the image which imaged the coating layer 20 actually coated on the resin film 11 which the 1st optical laminated body 10 has. 11 shows, as indicated by arrow α1 in FIG. 9 , an area of the first optical laminate 10 that is not located on the conveying roller 42 (between the conveying rollers 42 or a pair of the conveying rollers 42 ). It is an image at the time of imaging the area|region between the nip rollers 44 of "I" in the inspection light field in FIG. 11 means the planar inspection light L1. "II" in the inspection light field in FIG. 11 means the inspection light L1 having the stripe pattern 112 periodically fluctuating between the first pattern 112A and the second pattern 112B. In addition, the "film edge part" in FIG. 11 corresponds to the edge part 11a, and the "coating edge part" corresponds to the edge part 20a. 11, both the inspection light L1 of the planar shape and the inspection light L1 of the stripe pattern 112 can detect the end 11a (film end) and the end 20a (coating end) It can be understood that there was

In the stripe pattern 112, the bright part 112a and the dark part 112b are alternately arranged. Therefore, it is possible to obtain a plurality of images lit from multiple directions. In this case, since the obtained image is immediately analyzed to generate an uneven image or a texture image, a stable inspection can be performed regardless of the surface state or the measurement environment.

When the 1st optical laminated body 10 is arrange|positioned on the conveyance roller 42, by the surface of the conveyance roller 42, for example, a regular reflection arises. For example, by using the stripe pattern 112, multiple images lit from multiple directions can be imaged, so that even if the surface of the conveying roller 42 is, for example, a mirror surface, the surface of the conveying roller 42 is The effect of specular reflection by Therefore, it is easy to detect the end 11a and the end 20a and the end 11b and the end 20b. In other words, it is easy to detect the ends 11a and 20a and the ends 11b and 20b even in an environment susceptible to the influence of specular reflection. FIG. 12 is a region positioned on the conveyance roller 42 of the first optical laminate 10, as illustrated by the arrow α2 in FIG. 9 , the resin film ( It is a figure which shows the image which imaged the coating layer 20 coated on 11). The meaning of "II" in the column of the inspection light in FIG. 12, and the "film edge part" and the "coating edge part" in an image is the same as the case of FIG. 12, by using the stripe pattern 112 even in the area|region on the conveyance roller 42 in the 1st optical laminated body 10, the edge part 11a (film edge part) and the edge part 20a It can be understood that the (coating end) could be detected.

In the form illustrated in FIG. 9, after forming the laminated body 4, the peeling member 6 was peeled from the laminated body 4 next. However, the laminate 4 may be wound once to form a roll body. In this case, the peeling member 6 is peeled from the laminated body 4, unwinding the laminated body 4 from the roll body of the laminated body 4 again. The retardation plate 2 obtained by peeling the peeling member 6 from the laminate 4 is conveyed without the retardation surface (the surface opposite to the resin film 11 of the retardation plate 2) touching the conveying roll etc. While, for example, a process such as bonding a polarizing plate to the retardation plate 2 can be performed. In this case, for example, damage to the phase difference plane can be prevented.

The 1st optical laminated body 10 may laminate|stack the 1st retardation layer 13 directly on the resin film 11, and may be sufficient as it. As for the 2nd optical laminated body 30, what laminated|stacked the 2nd retardation layer 33 directly on the resin film 31 may be sufficient.

(Modification 1)

The management method may be implemented with respect to the laminated body 4 conveyed between a pair of nip roller 44 and the peeling roller 46, as illustrated by the arrow beta shown in FIG. In this case, as shown in FIG. 13, the 1st resin film 11 of the 1st optical laminated body 10 and the resin film 31 of the 2nd optical laminated body 30 were demonstrated in 1st Embodiment. As the member layer 102 and the second member layer 104, the management method described in the first embodiment is implemented. In the modified example 1, the edge part 11a of the resin film 11 corresponds to the edge part 102a, and the edge part 31a of the resin film 31 corresponds to the edge part 104a. In addition, the distance D1b in the x direction between the edge part 11a and the edge part 31a corresponds to the distance D1. In FIG. 13, in order to specify the distance D1b, the state in which the center of the 2nd optical laminated body 30 shifted with respect to the center (the center of x direction) of the 1st optical laminated body 10 is shown.

In the modified example 1, the reflection optical system 106 is arrange|positioned with respect to the laminated body 4 conveyed between a pair of nip roller 44 and the peeling roller 46, and the measurement process S02 which a management method has is performed, Measure the distance D1b. Further, in the determination step S03, it is determined whether the distance D1b is within a predetermined range.

Usually, since the 1st optical laminated body 10 and the 2nd optical laminated body 30 are laminated|stacked so that the center of each other in the x direction may correspond, the position of the edge part 11a and the edge part 31a is in the x direction. it's the same location Therefore, for example, the predetermined range for the distance D1b is a range including a certain manufacturing error with respect to the case where the distance is zero.

When the distance D1b is within the predetermined range, the manufacture of the retardation plate 2 is continued. On the other hand, when the distance D1b is outside the predetermined range, for example, in the change step S04, the manufacturing conditions are changed so that the distance D1b is within the predetermined range. For example, the conveyance path (condition) of the 1st optical laminated body 10 and the 2nd optical laminated body 30 is changed. This change step S04 is repeated until the distance D1b is within a predetermined range in the determination step S03. For example, the manufacturing process of the phase difference plate 2 and the change process S04 up to the determination process S03 are repeated.

When distance D1b exists outside a predetermined range, the 2nd optical laminated body 30 is not bonded by the desired position with respect to the 1st optical laminated body 10. As shown in FIG. Therefore, the arrangement|positioning relationship of the contact bonding layer 22 and the 2nd optical laminated body 30 also shifts|deviates from a desired position. As a result, when peeling the peeling member 6 from the laminated body 4, there exists a possibility that the problem that the site|part to be peeled remains on the retardation plate 2 side which should become a product may arise.

On the other hand, as in the first modified example, the above problem can be prevented by applying the management method described in the first embodiment to the laminate 4 between the pair of nip rollers 44 and the peeling roller 46 . . As a result, the retardation plate 2 of good quality is easily manufactured, and the manufacturing yield of the retardation plate 2 improves.

(Modification 2)

The management method may be implemented with respect to the retardation plate 2 obtained by peeling the peeling member 6 from the laminated body 4 by the peeling roller 46, as illustrated by the arrow gamma 1 shown in FIG. . Or you may implement the management method with respect to the peeling member 6 obtained by peeling the peeling member 6 from the laminated body 4 with the peeling roller 46, as illustrated by arrow γ2.

The case where the management method is implemented with respect to the phase difference plate 2 as shown by arrow gamma 1 is demonstrated. In this case, as shown in FIG. 14 , the resin film 11 is used as the first member layer 102 , and the second retardation layer 33 on the adhesive layer 22 is managed as the second member layer 104 . method is carried out. When implementing the management method with respect to the retardation plate 2, the edge part 11a of the resin film 11 corresponds to the edge part 102a, and the edge part 33a of the 2nd retardation layer 33 is the edge part 104a. is equivalent to In addition, the distance D1c in the x direction between the edge part 11a and the edge part 33a corresponds to the distance D1.

When the management method is implemented at the position of the arrow γ1, the reflective optical system 106 is disposed with respect to the retardation plate 2 at the rear end of the peeling roller 46, and the measurement step S02 that the management method has is performed to perform the distance (D1c) is measured. In the determination step S03, it is determined whether the distance D1c is within a predetermined range.

When the peeling member 6 is properly peeled off by the peeling roller 46, the distance D1c between the edge part 11a and the edge part 33a in the long direction of the retardation plate 2 is constant. On the other hand, when peeling by the peeling roller 46 cannot be performed properly, the part to peel among the 2nd retardation layers 33 which the 2nd optical laminated body 30 has remains on the retardation plate 2 side. do. For this reason, for example, the distance D1c between the edge part 11a and the edge part 33a in the phase difference plate 2 changes.

When the distance D1c is outside a predetermined range (a range in consideration of manufacturing errors in the originally set distance), for example, a portion of the second retardation layer 33 to be peeled remains on the retardation plate 2 side. It seems that there is a problem (or abnormality) that you are doing. Therefore, by judging whether the distance D1c is a predetermined range in determination process S03 of a management process, the presence or absence of abnormality at the time of the peeling member 6 peeling from the laminated body 4 can be detected. If abnormality is detected, in change process S04, manufacturing conditions are changed so that the distance D1c may become a predetermined range. For example, what is necessary is just to adjust the lamination|stacking state of the 1st optical laminated body 10 and the 2nd optical laminated body 30, or to adjust the peeling force of the adhesive layer 22, etc., etc. may be performed suitably.

As indicated by the arrow γ2, when the management method is performed on the peeling member 6 at the rear end of the peeling roller 46, as shown in FIG. 14, the resin film 31 which the peeling member 6 has. ) as the 1st member layer 102, and the 2nd retardation layer 33 which the peeling member 6 has is set as the 2nd member layer 104, and a management method is implemented. In this case, the edge part 31a of the resin film 31 corresponds to the edge part 102a, and the edge part 33a of the 2nd retardation layer 33 which the peeling member 6 has corresponds to the edge part 104a. Further, the distance D1d in the x direction between the end 31a and the end 33a corresponds to the distance D1. As for the method of implementing a management method with respect to the peeling member 6, the 1st member layer 102 and the 2nd member layer 104 have the resin film 31 and the 2nd retardation layer 33 which the peeling member 6 has. ) except that it is the same as in the case of implementing the management method with respect to the retardation plate 2 .

(Modified example 3)

Instead of the 1st optical laminated body 10 and the 2nd optical laminated body 30, you may use the 1st optical laminated body 10A and the 2nd optical laminated body 30A shown in FIG. The 1st optical laminated body 10A differs from the structure of the 1st optical laminated body 10 in that the 1st retardation layer 13 does not cover the both ends of the orientation film 12 in the x direction. Similarly, the 2nd optical laminated body 30A differs from the structure of the 2nd optical laminated body 30 in that the 2nd retardation layer 33 does not cover the both ends of the orientation film 32 in the x direction. . In general, the length of the first retardation layer 13 in the x direction is shorter than the length of the alignment layer 12 , and the length of the second retardation layer 33 in the x direction is shorter than the length of the alignment layer 32 . In this case, in the peeling roller 46 shown in FIG. 9, as shown in FIG. 16, the resin film 31 which the 2nd optical laminated body 30A has is peeled selectively. As a result, on the resin film 11, the alignment film 12, the first retardation layer 13, the adhesive layer 22, the second retardation layer 33, and the alignment film 32 are sequentially laminated on the retardation plate 2A. This can be manufactured. The manufacturing method of 2A of retardation plates to which the management method is applied is the same as the case demonstrated using FIGS. Accordingly, in the case of Modification Example 3, the same effect as in the case of manufacturing the retardation plate 2 is obtained.

In the above, embodiments and modifications according to the present invention have been described. However, this invention is not limited to the illustrated embodiment and modified example, The range shown by the claim is included, At the same time, it is intended that the meaning and equivalent of a claim and all changes within the range are included. do.

The manufacturing method of the retardation plate to which the management method was applied in the case where an optical component is a retardation plate was demonstrated. However, the optical component to which the manufacturing method according to the present invention is applied is not limited to the retardation plate. Other examples of the optical component include a polarizing plate in which a polarizing film (polarizer layer) and a protective film are laminated, and a circularly polarizing plate (including an elliptically polarizing plate) in which a retardation plate and a polarizing plate are bonded by an adhesive layer. An example of the polarizer layer is a PVA layer.

When the optical component is the circularly polarizing plate, for example, a first member layer having a retardation plate or a polarizing plate (for example, a member corresponding to the resin film 11 shown in FIG. 5), and an adhesive layer between the retardation plate and the polarizing plate You may apply the said management method by making a coating layer into a 2nd member layer. Alternatively, as described in the modified example 1, the management method may be applied to the position adjustment of the retardation plate and the polarizing plate.

The management method which concerns on this invention is applicable to the laminated body which has a resin film (1st member layer) and a coating layer (2nd member layer). The management method which concerns on this invention is applicable to the laminated body which has, for example, a polarizing film or a polarizing plate (1st member layer) containing a polarizing film, and a coating layer (2nd member layer). The management method which concerns on this invention may be applied, for example, when a coating layer (2nd member layer) is directly formed on a resin film (1st member layer).

The management method according to the present invention can also be applied, for example, when an adhesive layer formed on a release film is transferred to a first member layer (eg, a resin film). In this case, the bonding body by which the peeling film with an adhesive bond layer was bonded to the 1st member layer through the adhesive layer is prepared. By peeling a peeling film from this bonding body, the laminated body in which the contact bonding layer was laminated|stacked on the 1st member layer is obtained. In this case, what is necessary is just to apply a management method to the said laminated body using an adhesive layer as a 2nd member layer. For example, what is necessary is just to implement a management method with respect to the laminated body obtained by peeling a peeling film using the peeling roller 46 in FIG. 9, conveying a bonding body in the direction of a long picture when the said bonding body is long. Accordingly, it can be determined whether or not the transfer of the adhesive layer to the first member layer is appropriate.

Alternatively, the management method according to the present invention can be applied even when the protective film is peeled off when the adhesive layer (second member layer) and the protective film (or release film) are laminated on the base material (first member layer). have. For example, in this case, when the lamination member of the base material, the adhesive layer, and the protective film is a long member, the protective film is peeled using the peeling roller 46 in FIG. 9, and the management method for the obtained laminate of the base material and the adhesive layer should be carried out Accordingly, it can be determined whether or not the protective film has been properly peeled (whether the adhesive layer remains on the protective film side).

Furthermore, the management method which concerns on this invention is applicable also to the laminated body which has other optical function films, such as a polarizing film, in addition to a base material (1st member layer) and an adhesive layer (2nd member layer).

In the management method according to the present invention, as described in Modification Example 1 of the second embodiment, an abnormality in the alignment of the first member layer and the second member layer in the laminate of the first member layer and the second member layer It can also be applied to the management of presence or absence.

2, 2A: retardation plate
4: laminate
11: Resin film (first member layer)
11a: end (first end)
20: coating layer
20a: end (second end)
100: laminate
102: first member layer
102a: end (first end)
104: second member layer
104a: end
112: striped pattern
112a: list
112b: dark
112A: first pattern
112B: second pattern
114: image processing device
A1, A2: end area
D1, D1a, D1b, D1c, D1d, D2, D2a: Distance (distance between ends)
L1: inspection light
L2: Reflected light.

Claims (16)

A method of measuring an end area of a laminate including a first member layer and a second member layer, the method comprising:
The first member layer has a first end,
the second member layer has a second end positioned on the same side as the first end when viewed in a lamination direction of the first member layer and the second member layer in the laminate;
The end region is a region extending from the first end to the second end in the laminate;
an irradiation process of irradiating inspection light to the end region;
a detection step of detecting reflected light that is the inspection light reflected by the end region;
A calculation step of calculating a distance between the first end and the second end based on a detection result of the reflected light
A measurement method comprising a. The measuring method according to claim 1, wherein the first member layer is a resin film layer, and the second member layer is a coating layer formed of a pressure-sensitive adhesive or an adhesive. The measuring method according to claim 1 or 2, wherein the inspection light has a stripe pattern in which bright parts and dark parts are alternately arranged. The measuring method according to claim 3, wherein the shape of the stripe pattern periodically fluctuates. According to claim 4, wherein the shape of the stripe pattern periodically fluctuates between the first pattern and the second pattern,
The measuring method in which the extending direction of the said bright part and the said dark part in a said 2nd pattern is orthogonal to the extending direction of the said bright part and the said dark part in the said 1st pattern. According to any one of claims 1 to 5, wherein the laminate is a long laminate,
A measuring method in which the step of irradiating the inspection light and the step of detecting the reflected light are carried out while conveying the laminate in a long direction. A method for managing an end region of a laminate comprising a first member layer and a second member layer, the method comprising:
The first member layer has a first end,
the second member layer has a second end positioned on the same side as the first end when viewed in a lamination direction of the first member layer and the second member layer in the laminate;
The end region is a region extending from the first end to the second end in the laminate;
an irradiation process of irradiating inspection light to the end region;
a detection step of detecting reflected light that is the inspection light reflected by the end region;
a calculation step of calculating a distance between the first end and the second end based on the detection result of the reflected light;
A determination step of determining whether the calculated distance is within a predetermined range
A management method having a. The management method according to claim 7, wherein the first member layer is a resin film layer, and the second member layer is a coating layer formed of an adhesive or an adhesive. The management method according to claim 7 or 8, wherein the inspection light has a stripe pattern in which bright and dark portions are alternately arranged. The management method according to claim 9, wherein the shape of the stripe pattern periodically fluctuates. 11. The method of claim 10, wherein the shape of the stripe pattern periodically fluctuates between the first pattern and the second pattern,
The management method in which the extending direction of the said bright part and the said dark part in a said 2nd pattern is orthogonal to the extending direction of the said bright part and the said dark part in the said 1st pattern. 12. The method according to any one of claims 7 to 11, further comprising a lamination step of laminating the second member layer on a lamination member having the first member layer or on the first member layer before the irradiation step. management method. The management method of Claim 12 which laminates|stacks the said 2nd member layer on the said 1st member by coating a coating material on the said 1st member layer in the said lamination|stacking process. The method according to claim 13, further comprising: a changing step of changing a coating area of the coating material in the laminating step when the calculated distance is not included in a predetermined range;
The management method of repeating the said lamination|stacking process, the said irradiation process, the said detection process, and the said determination process until the said calculated distance falls within a predetermined range. The laminate according to any one of claims 12 to 14, wherein the laminate is a long laminate,
The said lamination process, the said irradiation process, and the said detection process are a management method performed, conveying the said laminated body in a long direction. The manufacturing method of the optical component containing the management method in any one of Claims 7-15.

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