JP4610882B2 - Optical element assembly and image pickup apparatus including the optical element assembly - Google Patents

Description

  The present invention relates to an optical element assembly formed by combining a plurality of optical elements such as prisms, and an imaging device (for example, a digital still camera, a mobile phone or a personal computer having a camera function, or , Video cameras, etc.).

  In recent years, downsizing of imaging apparatuses such as a digital still camera, a mobile phone having a camera function, a personal computer, or a video camera has been remarkably advanced. As miniaturization of imaging devices progresses, there is an increasing demand for miniaturization and thinning of the assembly of imaging function units (assemblies including optical systems as main components) incorporated in the main body of these devices. It has become so.

  In order to make the optical system thinner, conventionally, prism optical systems using so-called free-form surfaces and the like have been proposed in, for example, Patent Documents 1 to 5 (see the description column of Patent Documents) listed below.

  In Patent Document 1, in order to provide an imaging lens that is small and light, has good telecentricity, easily corrects astigmatism, and is easy to process and assemble, the convex surface is directed toward the object side in order from the object side. The negative meniscus first lens, the aperture, and the positive meniscus second lens with the convex surface facing the image plane are constituent elements, and each of the two balls (the first lens and the second lens) has at least one surface. It is disclosed that an optical element assembly is configured to satisfy a specific condition by forming an aspherical surface.

  According to Patent Document 2, an image pickup device such as a CCD is mounted on a mobile phone, so that an image can be taken easily by a mobile phone that can be easily carried without having a digital still camera or a personal computer. A technique that can be sent to is disclosed. The imaging function unit of the cellular phone includes an imaging device placed on a substrate, a lens unit that forms a subject image on a light receiving surface of the imaging device, and an optical unit that includes a leg unit that supports the lens unit. It is comprised including the member. Then, the lens unit is brought into contact with the surface of the imaging element facing the lens unit with a contact force of 5 g or more and 500 g or less, so that the lens unit is compared with the case where the leg unit is contacted with the substrate. And positioning in the optical axis direction with respect to the light receiving surface of the image sensor can be accurately performed. Further, by setting the contact force to 5 g or more, it is possible to prevent image blurring during shooting due to the vibration of the optical member due to vibration or the like, and by setting the contact force to 500 g or less, the imaging device is damaged or malfunctions. It is also described that can be suppressed.

  In Patent Document 3, in order to provide a compact, thin and low-cost imaging optical system having an optical low-pass filter and an apparatus using the imaging optical system, an imaging optical system for forming an object image includes a stop, An object-side reflecting surface disposed on the object side of the stop, and an image-side reflecting surface disposed on the image side of the stop, and the object-side reflecting surface and the image-side reflecting surface both emit light when reflected A combination of optical elements is disclosed which includes an aspherical surface that gives power to the lens and is provided with a low-pass filter that cuts high-frequency components between the object-side reflecting surface and the image-side reflecting surface.

  In an imaging optical system for a video camera, a digital still camera, a film scanner, an endoscope, and the like, the optical system itself is required to be reduced in size, weight, and cost as the imaging element is reduced in size. Recently, products that incorporate an electronic imaging optical system in mobile phones, PDAs, notebook computers, and the like have come out, and it is strongly desired to make the optical system thinner.

In view of such a situation, Patent Document 4 and Patent Document 5 realize a high-performance and low-cost imaging optical system with a small number of optical elements, and further fold the optical path with only three reflecting surfaces. In particular, in order to provide a high-performance imaging optical system in which the vertical size of the image sensor is significantly reduced,
A configuration of an imaging function unit is disclosed in which a prism having required characteristics as this type of optical element is combined to meet the above-described requirements.
Japanese Patent Laid-Open No. 2002-267928 JP 2002-320122 A Japanese Patent Laid-Open No. 11-326766 JP 2002-196243 A JP 2003-084200 A

Any of the above-mentioned documents merely discloses a technique using a combination of a plurality of prisms and the like whose appropriate optical characteristics are selected as optical elements. That is, how the positional relationship of mutual has not been holding or coupling allowed to crab For necessarily specific proposals to be maintained in a predetermined relationship with them optical element.

It is an object of the present invention to provide an optical element assembly that holds or couples optical elements so that their positional relationship is maintained in a predetermined relationship, and an imaging apparatus including the optical element assembly.

  In order to achieve the above object, an optical element assembly of the present invention and an image pickup apparatus including the optical element assembly have the following characteristic configurations. In addition, about the characteristic structure of this invention other than the following, it clarifies in embodiment.

The optical element assembly of the present invention comprises:
A first optical element predetermined incident light arriving on one of the incident surface is configured prism to exit from a given one of the exit surface and reflected at a predetermined back reflecting surface with a power from the object side , first it is constructed prism so that the incident light coming from the first optical element side in a predetermined one of the incident surface is emitted from a predetermined one of the exit surface and reflected at a predetermined back reflecting surface with a power An optical element assembly comprising: two optical elements; and a positioning holding member for maintaining and holding the relative positions of both the first optical element and the second optical element in a predetermined relationship. There,
The first optical element has one fitting shape formed on one corresponding surface of the positioning holding member facing the exit surface at a peripheral portion of an effective region through which the effective light beam passes on the one exit surface of the first optical element. Self-fitting shape part corresponding to the part is provided,
The second optical element has another fitting shape formed on another corresponding surface of the positioning holding member facing the incident surface at a peripheral portion of the effective region through which the effective light beam passes on the first incident surface of the second optical element. Self-fitting shape part corresponding to the part is provided,
In the positioning holding member, an optical aperture opening that allows the light beam to pass between the one corresponding surface and the other corresponding surface is formed in a predetermined portion.
One of the peripheral portions of the first optical element and the peripheral portion of the optical diaphragm opening of the one corresponding surface of the positioning holding member is in contact with the predetermined peripheral portion of the one exit surface. A first attitude adjustment unit comprising a plurality of protrusions that adjusts the attitude by adjusting an inclination angle of a facing surface between the one exit surface of the first optical element and the one corresponding surface of the positioning holding member by contact with each other. Is formed, and
One of the peripheral portions of the second optical element and the peripheral portion of the optical aperture opening on the other corresponding surface of the positioning holding member is contacted with the predetermined peripheral portion of the one incident surface of the second optical element. A second attitude adjustment unit comprising a plurality of protrusions that adjust the attitude by adjusting the inclination angle of the opposing surface between the one incident surface of the second optical element and the other corresponding surface of the positioning holding member by contacting with each other. Is formed,
It is characterized by that.

The imaging device of the present invention includes:
A first optical element predetermined incident light arriving on one of the incident surface is configured prism to exit from a given one of the exit surface and reflected at a predetermined back reflecting surface with a power from the object side , first it is constructed prism so that the incident light coming from the first optical element side in a predetermined one of the incident surface is emitted from a predetermined one of the exit surface and reflected at a predetermined back reflecting surface with a power Two optical elements, and a positioning holding member for maintaining and holding the relative positions of both the first optical element and the second optical element in a predetermined relationship,
The first optical element has one fitting shape formed on one corresponding surface of the positioning holding member facing the exit surface at a peripheral portion of an effective region through which the effective light beam passes on the one exit surface of the first optical element. Self-fitting shape part corresponding to the part is provided,
The second optical element has another fitting shape formed on another corresponding surface of the positioning holding member facing the incident surface at a peripheral portion of the effective region through which the effective light beam passes on the first incident surface of the second optical element. Self-fitting shape part corresponding to the part is provided,
In the positioning holding member, an optical aperture opening that allows the light beam to pass between the one corresponding surface and the other corresponding surface is formed in a predetermined portion.
One of the peripheral portions of the first optical element and the peripheral portion of the optical diaphragm opening of the one corresponding surface of the positioning holding member is in contact with the predetermined peripheral portion of the one exit surface. A first attitude adjustment unit comprising a plurality of protrusions that adjusts the attitude by adjusting an inclination angle of a facing surface between the one exit surface of the first optical element and the one corresponding surface of the positioning holding member by contact with each other. Is formed, and
One of the peripheral portions of the second optical element and the peripheral portion of the optical aperture opening on the other corresponding surface of the positioning holding member is contacted with the predetermined peripheral portion of the one incident surface of the second optical element. A second attitude adjustment unit comprising a plurality of protrusions that adjust the attitude by adjusting the inclination angle of the opposing surface between the one incident surface of the second optical element and the other corresponding surface of the positioning holding member by contacting with each other. Is formed,
An optical element assembly;
An image sensor that photoelectrically converts a light image generated by the light beam emitted from the first exit surface of the second optical element of the optical element assembly; and
Image data generating means for processing the signal photoelectrically converted by the image sensor and generating image data;
It is characterized by having.

The imaging device of the present invention includes:
A first optical element predetermined incident light arriving on one of the incident surface is configured prism to exit from a given one of the exit surface and reflected at a predetermined back reflecting surface with a power from the object side , first it is constructed prism so that the incident light coming from the first optical element side in a predetermined one of the incident surface is emitted from a predetermined one of the exit surface and reflected at a predetermined back reflecting surface with a power Two optical elements, and a positioning holding member for maintaining and holding the relative positions of both the first optical element and the second optical element in a predetermined relationship,
The first optical element has one fitting shape formed on one corresponding surface of the positioning holding member facing the exit surface at a peripheral portion of an effective region through which the effective light beam passes on the one exit surface of the first optical element. Self-fitting shape part corresponding to the part is provided,
The second optical element has another fitting shape formed on another corresponding surface of the positioning holding member facing the incident surface at a peripheral portion of the effective region through which the effective light beam passes on the first incident surface of the second optical element. Self-fitting shape part corresponding to the part is provided,
In the positioning holding member, an optical aperture opening that allows the light beam to pass between the one corresponding surface and the other corresponding surface is formed in a predetermined portion.
One of the peripheral portions of the first optical element and the peripheral portion of the optical diaphragm opening of the one corresponding surface of the positioning holding member is in contact with the predetermined peripheral portion of the one exit surface. A first attitude adjustment unit comprising a plurality of protrusions that adjusts the attitude by adjusting an inclination angle of a facing surface between the one exit surface of the first optical element and the one corresponding surface of the positioning holding member by contact with each other. Is formed, and
One of the peripheral portions of the second optical element and the peripheral portion of the optical aperture opening on the other corresponding surface of the positioning holding member is contacted with the predetermined peripheral portion of the one incident surface of the second optical element. A second attitude adjustment unit comprising a plurality of protrusions that adjust the attitude by adjusting the inclination angle of the opposing surface between the one incident surface of the second optical element and the other corresponding surface of the positioning holding member by contacting with each other. Is formed,
An optical element assembly;
An optical image forming optical system for connecting a light image by a light beam emitted from the one exit surface of the second optical element of the optical element assembly;
It is characterized by having.

The optical element assembly configured as described above in the present invention and the image pickup apparatus using the optical element assembly hold or combine the optical elements so that their positional relationship is maintained in a predetermined relationship.

(First embodiment)
FIG. 1 is a schematic configuration diagram showing an outline of an imaging apparatus 100 to which an optical element assembly PA according to a first embodiment of the present invention is applied. An imaging apparatus 100 illustrated in FIG. 1 includes an imaging optical system 110, an imaging element 120, and an image data generation unit 130.

  The imaging optical system 110 positions the first optical element 10 and the second optical element 20 that are allowed to be prisms so as to have a light beam transmission aperture so that the relative position between them is maintained in a predetermined relationship. The optical element assembly PA held by the holding member 30 is mainly used. Reference numerals 111 and 112 denote cover glasses. One or both of these may be IR cut filters having an infrared blocking function. Further, the positioning holding member 30 has a functional portion as a diaphragm. The optical element assembly PA will be described later.

  The image sensor 120 photoelectrically converts a light image generated by the light beam emitted from the optical element assembly PA.

  The image data generation means 130 processes the signal photoelectrically converted by the image sensor 120, and if necessary, for example, a processing means 131 that can perform compression / expansion of image data or the like, and the image data processed by the processing means 131. Is recorded on a recording medium (a memory card can be applied), and a reproducing unit 133 that can reproduce image data recorded on the recording unit 132 at appropriate times and output the data from an output terminal 134. The processing means 131 can communicate with an external device or the like via a terminal 135.

FIG. 2 is a diagram showing the configuration of the optical system of the optical element assembly PA. As shown in FIG.
The first optical element 10 of the optical element assembly PA reflects incident light that has arrived from the subject side through the cover glass 111 and entered the predetermined incident surface 11 by a predetermined rear surface reflecting surface 12 having power, And a prism configured to emit from one exit surface 13. In addition, the second optical element 20 of the optical element assembly PA receives incident light that has arrived at the predetermined one incident surface 21 from the first optical element 10 side, and has predetermined power reflecting surfaces 22-1 and 22 having power. -2 and a prism configured to exit from a predetermined exit surface 23. In FIG. 2, reference numeral 121 indicates a light receiving surface of the image sensor 120. As described above with reference to FIG. 1, the positioning holding member 30 is interposed between the first optical element 10 and the second optical element 20, and the functional portion 301 as an optical aperture is provided on the positioning holding member 30. Yes.

  FIG. 3 is a perspective view showing a state in which the first optical element 10 and the second optical element 20 of the optical element assembly PA are integrally held by the positioning holding member 30. FIG. 4 is a side view showing a state where the first optical element 10 and the second optical element 20 are integrally held by the positioning holding member 30. FIG. 5 is an exploded perspective view showing a state in which the first optical element 10, the second optical element 20, and the positioning holding member 30 are separated. 6A and 6B are perspective views showing structures on the light beam exit surface side of the first optical element 10 and the light beam entrance surface side of the second optical element 20.

7A, 7B, and 7C are views showing the structure of the positioning and holding member 30, wherein FIG. 7A is a plan view showing the shape of the surface, and FIG. 7B is a view taken along the line 8b-8b in FIG. Sectional drawing and (c) are top views which show the shape of a back surface.

  As shown in FIGS. 3 to 7 (a), (b), and (c), the first optical element 10 is short on the peripheral portion of the effective region 14 through which the effective light beam on the one exit surface 13 side passes. It has the shape parts 15a and 15b for fitting which consist of a cylindrical convex-shaped part. The fitting shape portions 15 a and 15 b correspond to one fitting shape portion 35 a and 35 b formed on one corresponding surface 31 of the positioning holding member 30 facing the emission surface 13 of the first optical element 10. Yes. In addition, the second optical element 20 has fitting shape portions 26a and 26b that are similarly short columnar convex portions in the peripheral portion of the effective region 24 through which the effective light beam on the one incident surface 21 side passes. ing. The fitting shape portions 26 a and 26 b correspond to other fitting shape portions 36 a and 36 b formed on the other corresponding surface 32 of the positioning holding member 30 facing the incident surface 21 of the second optical element 20. ing.

  The positioning holding member 30 has an optical aperture opening 33 that allows a light beam to pass between the one corresponding surface 31 and the other corresponding surface 32 at a substantially central portion thereof. The positioning holding member 30 has one fitting shape portion 35a, 35b made of a concave portion (a bottomed circular hole in the present embodiment) on the one corresponding surface 31, and a concave shape on the other corresponding surface 32. It has other fitting shape parts 36a and 36b made of a part (in this embodiment, a bottomed circular hole).

  The first optical element 10 and the second optical element 10 are formed by fitting the fitting shape portions 15a and 15b with the fitting shape portions 35a and 35b and fitting the fitting shape portions 26a and 26b with the fitting shape portions 36a and 36b. The optical element 20 is integrally coupled with a predetermined holding relationship with the positioning holding member 30 interposed therebetween.

  As shown in FIGS. 6A and 6B, the first optical element 10 is separated from the fitting shape portions 15 a and 15 b of the first optical element 10 by a predetermined distance and does not correspond to the effective area 14. Are formed at first predetermined position adjustment portions 17a, 17b, and 17c made of hemispherical protrusions for adjusting the relative posture of the first optical element 10 with respect to the positioning and holding member 30. . These first posture adjusting portions 17a, 17b, and 17c have their heights adjusted in advance so that the exit surface 13 of the first optical element 10 and the corresponding surface 31 of the positioning holding member 30 are opposed to each other. This is for adjusting the inclination angle and adjusting the posture.

  Further, the second optical element 20 is located at a predetermined portion on the first incident surface side 21 that is separated from the fitting shape portions 26 a and 26 b of the second optical element 20 by a predetermined distance and does not correspond to the effective region 24. The second posture adjusting portions 27a, 27b and 27c are formed of hemispherical protrusions for adjusting the relative posture with respect to the positioning and holding member 30. These second attitude adjustment units 27a, 27b, and 27c adjust their heights in advance, so that the opposing surfaces of the incident surface 21 of the second optical element 20 and the other corresponding surface 32 of the positioning holding member 30 are adjusted. This is for adjusting the inclination angle and adjusting the posture.

  As shown in FIGS. 7A, 7 </ b> B, and 7 </ b> C, a first posture formed on the first optical element 10 is formed on a predetermined portion of the corresponding corresponding surface 31 of the positioning holding member 30. First contact portions 31a, 31b, and 31c that contact the adjustment portions 17a, 17b, and 17c are set.

  Further, a second portion of the positioning holding member 30 which is in contact with the second posture adjusting portions 27a, 27b and 27c formed on the second optical element side 20 is in contact with a predetermined portion of the other corresponding surface 32 of itself. Contact portions 32a, 32b, and 32c are set.

  The first posture adjustment unit and the second posture adjustment unit may be provided not on the first optical element 10 and the second optical element 20 side but on the positioning holding member 30 side. 8A, 8B, and 8C are diagrams showing modifications of the positioning and holding member 30 corresponding to FIGS. 7A, 7B, and 7C, and FIG. (B) is a 9b-9b arrow directional cross-sectional view of (a), (c) is a top view which shows the shape of a back surface.

  As shown in FIGS. 8A, 8 </ b> B, and 8 </ b> C, on one corresponding surface 31 of the positioning and holding member 30, first positioning and holding member-side posture adjusting portions 37 a and 37 b that are hemispherical protrusions are provided. 37c is formed. On the other corresponding surface 32 of the positioning / holding member 30, second positioning / holding member-side posture adjusting portions 38a, 38b, and 38c made of hemispherical protrusions are formed.

  FIGS. 9A and 9B are views showing a specific structure of the optical aperture opening 33 of the positioning holding member 30, wherein FIG. 9A is a cross-sectional view of the main part, and FIG. 9B is an enlarged cross-sectional view of the periphery of the opening. is there. As shown in FIGS. 9A and 9B, the stop forming portion of the optical stop opening 33 formed in the predetermined portion of the positioning holding member 30 is formed on the opening peripheral edge 33a in the cross section along the radial direction of the opening. As it goes, the dimension in the thickness direction gradually decreases. That is, it is shaped so as to have a shape that reaches a relatively small peripheral edge dimension t at the end that forms the opening peripheral edge 33a. It is recommended that the peripheral edge dimension t be set to about 5 μm to 50 μm, for example. Further, the opening peripheral edge 33 a is provided with a tapered surface that gradually becomes smaller in diameter from one corresponding surface 31 to the other corresponding surface 32. The tapered surface is inclined at an angle of θ (for example, about 2 to 5 °) with respect to the axial direction AX of the optical aperture opening 33. By having the optical aperture opening 33 having such a structure, the problem that unwanted light due to reflection at the periphery of the aperture aperture is input to the second optical element 20 side and an undesired optical action is generated is effective. Can be avoided. In addition, it is good also as a protrusion surface where a cross section makes circular arc shape instead of a taper surface.

(Second embodiment)
10A and 10B are views showing a specific structure of the optical aperture opening 33 of the positioning and holding member 30 according to the second embodiment of the present invention. FIG. 10A is a cross-sectional view of the main part, and FIG. FIG. 9 is a cross-sectional view showing a modified example of the opening of (a). The second embodiment is different from the first embodiment in that the optical aperture opening 33 is covered with a light transmitting member that functions as an IR cut filter. That is, the optical aperture opening 33 formed in a predetermined portion of the positioning and holding member 30 made of a light shielding member is filled with the light transmitting member 39. The light transmitting member 39 has a function as a filter that blocks IR (infrared rays).

  As shown in FIG. 10B, a step portion 33S is formed in the optical diaphragm opening 33 in the member thickness direction, and the light transmitting member 39 is partially filled by using the step portion 33S. Also good. Further, an adhesive having a light transmission function may be used as the light transmission member 39.

(Third embodiment)
FIGS. 11A and 11B are views showing a specific structure of the optical aperture opening 33 of the positioning holding member 30 according to the third embodiment of the present invention. FIG. 11A is a sectional view of the main part, and FIG. FIG. 9 is a cross-sectional view showing a modification of (a). The third embodiment is different from the first embodiment in that a structural member 40 made of a light-transmitting material having, for example, an IR blocking function is used as a base material of the positioning holding member 30, and one surface of the member, that is, the positioning holding member The light shielding film 41 is formed in a predetermined area portion excluding the area AO functioning as the optical aperture opening 33 on the surface on the other corresponding surface 32 side of 30.

  As shown in FIG. 11B, a structural member 40 ′ made of a normal light-transmitting material is used as the structural member, and one of the positioning and holding members 30 among the outer surfaces of the structural member 40 ′. On the surface 31 side, a predetermined area including the area AO ′ functioning as the optical aperture opening 33 may be covered with the film 42 functioning as an IR cut filter.

(Fourth embodiment)
12A and 12B are views showing an optical element assembly PA according to a fourth embodiment of the present invention, where FIG. 12A is a perspective view and FIG. 12B is a side view showing a partially broken view. The fourth embodiment is different from the first embodiment in that the first joining surface between the emission surface 13 of the first optical element 10 and one corresponding surface 31 of the positioning holding member 30 and the second optical element 20. The second joining surface between the incident surface 21 and the other corresponding surface 32 of the positioning holding member 30 is filled with fillers 51 and 52 made of, for example, an adhesive having light shielding properties. In the fourth embodiment, the gaps caused by the first posture adjusting portions 17a, 17b, 17c and the like interposed on the first joint surface, and the second posture adjusting portions 27a, 27b, 27c and the like interposed on the second joint surface, etc. The gap due to is filled with fillers 51 and 52 having light shielding properties. For this reason, it is possible to eliminate an adverse effect due to unnecessary light through the gap. Further, the fillers 51 and 52 can effectively prevent dust and the like from entering from the gap between the first optical element 10 and the second optical element 20 and the positioning holding member 30.

(Fifth embodiment)
FIGS. 13A and 13B are diagrams showing a schematic configuration of a digital camera according to a fifth embodiment of the present invention (an application example in which the optical element assembly PA of the present invention is applied to a digital camera). FIG. 2 is a diagram showing an example in which the optical element assembly PA is applied to an imaging system of a digital camera, and FIG.

  A digital camera 200 shown in FIG. 13A includes an imaging optical system 210 including an optical element assembly PA, an imaging element 220, an image data generation unit 230, and the like, as in the imaging apparatus 100 shown in FIG. In association with the image data generation means 230, an image display means 236 composed of an LCD or the like, an observation optical system 250 for monitoring an image displayed on the image display means 236, and the like are provided.

  A digital camera 300 shown in FIG. 13B includes an optical image forming optical system 350 including an optical element assembly PA. This optical image forming optical system 350 is for forming an optical image suitable for image observation from a light beam emitted from the optical element assembly PA. The optical image forming optical system 350 includes a focusing lens 351, a Porro prism 352, an eyepiece window 353, and the like. Reference numeral 310 denotes an image pickup optical system, 320 denotes an image pickup element, and 330 denotes an image data generation unit.

  13A and 13B, the optical system including the optical element assembly PA is configured to be suitable for mounting the digital camera 200 inside the housing.

(Sixth embodiment)
FIGS. 14A and 14B are diagrams showing a schematic configuration of a personal computer according to a sixth embodiment of the present invention (an application example in which the optical element assembly PA of the present invention is applied to a personal computer). FIG. A side view of a notebook personal computer, (b) is a schematic cross-sectional view showing a schematic configuration of a main part.

  As shown in FIGS. 14A and 14B, the image pickup optical system 410 including the optical element assembly PA, the image pickup element 420, the image data generation unit 430, and the like are suitable for mounting inside the housing of the personal computer 400. It is configured as follows.

(Seventh embodiment)
FIGS. 15A, 15B, and 15C are diagrams showing a schematic configuration of a mobile phone according to a seventh embodiment of the present invention (an application example in which the optical element assembly PA of the present invention is applied to a mobile phone). (A) is a front view, (b) is a side view, and (c) is a schematic cross-sectional view showing a schematic configuration of a main part.

  As shown in FIGS. 15A, 15B, and 15C, the imaging optical system 510 including the optical element assembly PA, the imaging element 520, the image data generation unit 530, and the like are mounted inside the casing of the mobile phone 500. It is configured to fit. Reference numeral 501 denotes a voice input microphone, 502 a speaker, 503 an input operation button, 504 a monitor display screen, and 505 an antenna.

(Feature points in the embodiment)
[1] The optical element assembly shown in the embodiment is
It is possible to use a prism configured such that incident light that has arrived at a predetermined one incident surface 11 from the subject side is reflected by a predetermined rear surface reflecting surface 12 having power and is emitted from a predetermined one emission surface 13. The incident light that has arrived at the predetermined one incident surface 21 from the first optical element 10 side is reflected by the predetermined back surface reflecting surfaces 22-1 and 22-2 having power, The second optical element 20 that can be a prism configured to emit from one exit surface 23, and the relative position of the first optical element 10 and the second optical element 20 with respect to each other. An optical element assembly PA comprising a positioning and holding member 30 for maintaining and holding in a predetermined relationship,
The first optical element 10 is formed on one corresponding surface 31 of the positioning holding member 30 facing the exit surface 13 in a peripheral portion of the effective region 14 through which the effective light beam on the one exit surface 13 side of the first optical element 10 passes. Self-fitting shape portions 15a, 15b corresponding to the one fitting shape portion 35a, 35b,
The second optical element 20 is formed on the other corresponding surface 32 of the positioning and holding member 30 facing the incident surface 21 in the peripheral region of the effective region 24 through which the effective light beam on the one incident surface 21 side of the second optical element 20 passes. Self-fitting shape portions 26a and 26b corresponding to the other fitting shape portions 36a and 36b are provided,
In the positioning and holding member 30, an optical aperture opening 33 that allows light transmission between the one corresponding surface 31 and the other corresponding surface 32 is formed in a predetermined portion, and the periphery of the aperture constituting the optical aperture opening 33 The diaphragm forming portion has a shape in which the dimension in the thickness direction gradually decreases toward the opening peripheral edge 33a in the cross section along the radial direction of the opening, and reaches a relatively small peripheral edge dimension t at the end portion forming the opening peripheral edge 33a. The peripheral edge dimension t is 5 μm to 50 μm.

[2] The optical element assembly shown in the embodiment is
It is possible to use a prism configured such that incident light that has arrived at a predetermined one incident surface 11 from the subject side is reflected by a predetermined rear surface reflecting surface 12 having power and is emitted from a predetermined one emission surface 13. The incident light that has arrived at the predetermined one incident surface 21 from the first optical element 10 side is reflected by the predetermined back surface reflecting surfaces 22-1 and 22-2 having power, The second optical element 20 that can be a prism configured to emit from one exit surface 23, and the relative position of the first optical element 10 and the second optical element 20 with respect to each other. An optical element assembly PA comprising a positioning and holding member 30 for maintaining and holding in a predetermined relationship,
The first optical element 10 is formed on one corresponding surface 31 of the positioning holding member 30 facing the exit surface 13 in a peripheral portion of the effective region 14 through which the effective light beam on the one exit surface 13 side of the first optical element 10 passes. Self-fitting shape portions 15a, 15b corresponding to the one fitting shape portion 35a, 35b,
The second optical element 20 is formed on the other corresponding surface 32 of the positioning and holding member 30 facing the incident surface 21 in the peripheral region of the effective region 24 through which the effective light beam on the one incident surface 21 side of the second optical element 20 passes. Self-fitting shape portions 26a and 26b corresponding to the other fitting shape portions 36a and 36b are provided,
The positioning holding member 30 has an optical aperture opening 33 that allows light transmission between the one corresponding surface 31 and the other corresponding surface 32 at a predetermined portion, and the optical aperture opening 33 is formed by the light transmitting member 39. And the light transmission member 39 functions as an IR cut filter.

[3] The optical element assembly shown in the embodiment is the optical element assembly according to the above [2],
The positioning and holding member 30 is characterized in that the optical aperture opening 33 is filled with an adhesive functioning as the light transmitting member 39.

[4] The optical element assembly shown in the embodiment is
It is possible to use a prism configured such that incident light that has arrived at a predetermined one incident surface 11 from the subject side is reflected by a predetermined rear surface reflecting surface 12 having power and is emitted from a predetermined one emission surface 13. The incident light that has arrived at the predetermined one incident surface 21 from the first optical element 10 side is reflected by the predetermined rear surface reflecting surfaces 22-1 and 22-2 having power, A second optical element 20 that can be a prism configured to emit from one exit surface 23, and the first optical element 10 and the second optical element 20. An optical element assembly PA including a positioning and holding member 30 having a portion that holds a relative position of the optical elements 10 and 20 in a predetermined relationship and functions as an optical diaphragm related to a light beam passing between the two optical elements. And
At the contact portion between the first optical element 10 and / or the second optical element 20 and the positioning holding member 30, posture adjusting portions 17a to 17c and 27a to 27c for adjusting the contact posture are provided. In addition, light-shielding fillers 51 and 52 are filled in a gap formed between the first optical element 10 and / or the second optical element 20 and the positioning holding member 30 by the posture adjusting unit. It is said.

[5] The optical element assembly shown in the embodiment is the optical element assembly according to the above [4],
The fillers 51 and 52 are light-blocking adhesives.

[6] The optical element assembly shown in the embodiment is
It is possible to use a prism configured such that incident light that has arrived at a predetermined one incident surface 11 from the subject side is reflected by a predetermined rear surface reflecting surface 12 having power and is emitted from a predetermined one emission surface 13. The incident light that has arrived at the predetermined one incident surface 21 from the first optical element 10 side is reflected by the predetermined back surface reflecting surfaces 22-1 and 22-2 having power, The second optical element 20 that can be a prism configured to emit from one exit surface 23, and the relative position of the first optical element 10 and the second optical element 20 with respect to each other. An optical element assembly PA comprising a positioning and holding member 30 for maintaining and holding in a predetermined relationship,
The first optical element 10 is formed on one corresponding surface 31 of the positioning holding member 30 facing the exit surface 13 in a peripheral portion of the effective region 14 through which the effective light beam on the one exit surface 13 side of the first optical element 10 passes. Self-fitting shape portions 15a, 15b corresponding to the one fitting shape portion 35a, 35b,
The second optical element 20 is formed on the other corresponding surface 32 of the positioning and holding member 30 facing the incident surface 21 in the peripheral region of the effective region 24 through which the effective light beam on the one incident surface 21 side of the second optical element 20 passes. Self-fitting shape portions 26a and 26b corresponding to the other fitting shape portions 36a and 36b are provided,
The positioning holding member 30 is an area AO that functions as an optical aperture opening 33 that allows light transmission between the one corresponding surface 31 and the other corresponding surface 32 on the outer surface of the structural member 40 made of a light-transmitting material. It is characterized in that a light shielding film 41 is formed in a predetermined area portion excluding.

[7] The optical element assembly shown in the embodiment is the optical element assembly according to the above [6],
The positioning and holding member 30 is further provided with a film that functions as an IR cut filter that covers a predetermined area including the area AO that functions as the optical aperture opening 33 in the outer surface of the structural member 40 made of the light transmissive material. It is characterized by being.

[8] The imaging device shown in the embodiment
It is possible to use a prism configured such that incident light that has arrived at a predetermined one incident surface 11 from the subject side is reflected by a predetermined rear surface reflecting surface 12 having power and is emitted from a predetermined one emission surface 13. The incident light that has arrived at the predetermined one incident surface 21 from the first optical element 10 side is reflected by the predetermined back surface reflecting surfaces 22-1 and 22-2 having power, The second optical element 20 that can be a prism configured to emit from one exit surface 23, and the relative position of the first optical element 10 and the second optical element 20 with respect to each other. A positioning and holding member 30 for maintaining and holding in a predetermined relationship,
The first optical element 10 is formed on one corresponding surface 31 of the positioning holding member 30 facing the exit surface 13 in a peripheral portion of the effective region 14 through which the effective light beam on the one exit surface 13 side of the first optical element 10 passes. Self-fitting shape portions 15a, 15b corresponding to the one fitting shape portion 35a, 35b,
The second optical element 20 is formed on the other corresponding surface 32 of the positioning and holding member 30 facing the incident surface 21 in the peripheral region of the effective region 24 through which the effective light beam on the one incident surface 21 side of the second optical element 20 passes. Self-fitting shape portions 26a and 26b corresponding to the other fitting shape portions 36a and 36b are provided,
The positioning holding member 30 has an optical aperture opening 33 that allows light transmission between the one corresponding surface 31 and the other corresponding surface 32 at a predetermined portion, and the optical aperture opening 33 is formed by the light transmitting member 39. And an optical element assembly PA in which the light transmission member 39 functions as an IR cut filter,
An image sensor 220 applied to perform photoelectric conversion on a light image by a light beam emitted from the exit surface 23 at the predetermined position of the optical element assembly PA;
Image data generating means 230 for generating image data suitable for predetermined recording and / or communication based on the output signal of the image sensor 220;
It is characterized by having.

[9] The imaging device shown in the embodiment
It is possible to use a prism configured such that incident light that has arrived at a predetermined one incident surface 11 from the subject side is reflected by a predetermined rear surface reflecting surface 12 having power and is emitted from a predetermined one emission surface 13. The incident light that has arrived at the predetermined one incident surface 21 from the first optical element 10 side is reflected by the predetermined back surface reflecting surfaces 22-1 and 22-2 having power, A second optical element 20 that can be a prism configured to emit from one exit surface 23, and the relative position of the first optical element 10 and the second optical element 20 with respect to each other. A positioning and holding member 30 for maintaining and holding in a predetermined relationship,
The first optical element 10 is formed on one corresponding surface 31 of the positioning holding member 30 facing the exit surface 13 in a peripheral portion of the effective region 14 through which the effective light beam on the one exit surface 13 side of the first optical element 10 passes. Self-fitting shape portions 15a, 15b corresponding to the one fitting shape portion 35a, 35b,
The second optical element 20 is formed on the other corresponding surface 32 of the positioning and holding member 30 facing the incident surface 21 in the peripheral region of the effective region 24 through which the effective light beam on the one incident surface 21 side of the second optical element 20 passes. Self-fitting shape portions 26a and 26b corresponding to the other fitting shape portions 36a and 36b are provided,
The positioning holding member 30 is an area AO that functions as an optical aperture opening 33 that allows light transmission between the one corresponding surface 31 and the other corresponding surface 32 on the outer surface of the structural member 40 made of a light-transmitting material. An optical element assembly PA in which a light shielding film 41 is formed in a predetermined region excluding
An image sensor 220 applied to perform photoelectric conversion on a light image by a light beam emitted from the exit surface 23 at the predetermined position of the optical element assembly PA;
Image data generating means 230 for generating image data suitable for predetermined recording and / or communication based on the output signal of the image sensor 220;
It is characterized by having.

[10] The imaging device shown in the embodiment is
It is possible to use a prism configured such that incident light that has arrived at a predetermined one incident surface 11 from the subject side is reflected by a predetermined rear surface reflecting surface 12 having power and is emitted from a predetermined one emission surface 13. The incident light that has arrived at the predetermined one incident surface 21 from the first optical element 10 side is reflected by the predetermined back surface reflecting surfaces 22-1 and 22-2 having power, The second optical element 20 that can be a prism configured to emit from one exit surface 23, and the relative position of the first optical element 10 and the second optical element 20 with respect to each other. A positioning and holding member 30 for maintaining and holding in a predetermined relationship,
The first optical element 10 is formed on one corresponding surface 31 of the positioning holding member 30 facing the exit surface 13 in a peripheral portion of the effective region 14 through which the effective light beam on the one exit surface 13 side of the first optical element 10 passes. Self-fitting shape portions 15a, 15b corresponding to the one fitting shape portion 35a, 35b,
The second optical element 20 is formed on the other corresponding surface 32 of the positioning and holding member 30 facing the incident surface 21 in the peripheral region of the effective region 24 through which the effective light beam on the one incident surface 21 side of the second optical element 20 passes. Self-fitting shape portions 26a and 26b corresponding to the other fitting shape portions 36a and 36b are provided,
In the positioning and holding member 30, an optical aperture opening 33 that allows light transmission between the one corresponding surface 31 and the other corresponding surface 32 is formed in a predetermined portion, and the periphery of the aperture constituting the optical aperture opening 33 The diaphragm forming portion has a shape in which the dimension in the thickness direction gradually decreases toward the opening peripheral edge 33a in the cross section along the radial direction of the opening 33 and reaches a relatively small peripheral edge dimension t at the end portion forming the opening peripheral edge 33a. And an optical element assembly PA having a peripheral edge dimension t of 5 μm to 50 μm.
An optical image forming optical system 350 for forming an optical image suitable for observation from a light beam emitted from a predetermined one exit surface 23 of the second optical element 20 of the optical element assembly PA;
It is characterized by having.

[11] The imaging device shown in the embodiment is the imaging device according to any one of [8] to [10],
The optical element assembly PA, the image sensor 220, and the image data generation means 230 are configured to be adapted to be mounted inside the housing of the digital camera 200.

[12] The imaging device described in the embodiment is the imaging device according to any one of [8] to [10],
The optical element assembly PA, the image sensor 220, and the image data generation means 230 are configured to be adapted to be mounted inside the housing of the personal computer 400.

[13] The imaging apparatus shown in the embodiment is the imaging apparatus according to any one of [8] to [10],
The optical element assembly PA, the image sensor 220, and the image data generation means 230 are configured to be adapted to be mounted inside the casing of the mobile phone.

  By using this apparatus, it is possible to provide an optical element assembly that has favorable optical characteristics and is required to be reduced in size and thickness, and an imaging apparatus using the same.

1 is a schematic configuration diagram showing an outline of an imaging apparatus to which an optical element assembly according to a first embodiment of the present invention is applied. It is a figure which shows the structure of the optical system of the optical element assembly which concerns on 1st Embodiment of this invention. It is a perspective view which shows the state by which the 1st optical element and 2nd optical element of the optical element assembly which concern on 1st Embodiment of this invention are integrally hold | maintained by the positioning holding member. It is a side view which shows the state in which the 1st optical element and 2nd optical element of the optical element assembly which concern on 1st Embodiment of this invention are integrally hold | maintained by the positioning holding member. It is a disassembled perspective view which shows the state from which the 1st optical element which concerns on 1st Embodiment of this invention, the 2nd optical element, and the positioning holding member was isolate | separated. (A) and (b) are perspective views showing structures of a light beam exit surface of a first optical element and a light beam entrance surface of a second optical element according to the first embodiment of the present invention. (A) (b) (c) is a figure which shows the structure of the positioning holding member based on 1st Embodiment of this invention, (a) is a top view which shows the shape of the surface, (b) is 7b of (a). Sectional view taken along line -7b, (c) is a plan view showing the shape of the back surface. (A) (b) (c) is a figure which shows the modification of the positioning holding member based on 1st Embodiment of this invention, (a) is a top view which shows the shape of the surface, (b) is (a). 8b-8b arrow sectional drawing, (c) is a top view which shows the shape of a back surface. (A) (b) is a figure which shows the specific structure of the optical aperture opening of the positioning holding member based on 1st Embodiment of this invention, (a) is principal part sectional drawing, (b) is an expansion of the opening periphery. It is sectional drawing. (A) (b) is a figure which shows the specific structure of the optical aperture opening of the positioning holding member which concerns on 2nd Embodiment of this invention, (a) is principal part sectional drawing, (b) is (a). It is sectional drawing which shows the modification of an opening part. (A) (b) is a figure which shows the specific structure of the optical aperture opening of the positioning holding member based on 3rd Embodiment of this invention, (a) is principal part sectional drawing, (b) is (a). It is sectional drawing which shows a modification. (A) (b) is a figure which shows the optical element assembly which concerns on 4th Embodiment of this invention, (a) is a perspective view, (b) is a partially broken side view. (A) (b) is a schematic block diagram which shows the application example to the digital camera of the apparatus which concerns on 5th Embodiment of this invention, (a) is the example which applied the optical element assembly to the imaging system of the digital camera, (B) is a figure which shows the example which applied the optical element assembly to the finder system of the digital camera. (A) (b) is a schematic block diagram which shows the example of application to the personal computer of the apparatus based on 6th Embodiment of this invention, (a) is a side view of a notebook-type personal computer, (b) is a principal part. It is a schematic sectional drawing which shows schematic structure. (A) (b) (c) is a schematic block diagram which shows the application example to the mobile telephone of the apparatus based on 7th Embodiment of this invention, (a) is a front view, (b) is a side view, ( c) is a schematic cross-sectional view showing a schematic configuration of a main part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... 1st optical element, 11 ... One incident surface, 12 ... Back surface reflective surface, 13 ... One exit surface, 14 ... Effective area | region of effective light beam passage, 15a, 15b ... Shape part for fitting (convex shape part) , 17a, 17b, 17c: first posture adjusting unit, 20: second optical element, 21: one incident surface, 22-1, 22-2 ... back reflecting surface, 23 ... one exit surface, 24 ... Effective region through which effective luminous flux passes, 26a, 26b ... fitting shape parts (convex parts), 27a, 27b, 27c ... second posture adjusting part, 30 ... positioning holding member, 31 ... one corresponding surface, 32 ... other 33: Optical aperture, 35a, 35b and 36a, 36b: Fitting shape part (bottomed concave part), 33a: Periphery of opening, 39: Light transmission member, 40, 40 ': Light transmission A structural member made of the above material, 41... Light-shielding film, 51 and 52.

Claims (13)

A first optical element predetermined incident light arriving on one of the incident surface is configured prism to exit from a given one of the exit surface and reflected at a predetermined back reflecting surface with a power from the object side , first it is constructed prism so that the incident light coming from the first optical element side in a predetermined one of the incident surface is emitted from a predetermined one of the exit surface and reflected at a predetermined back reflecting surface with a power An optical element assembly comprising: two optical elements; and a positioning holding member for maintaining and holding the relative positions of both the first optical element and the second optical element in a predetermined relationship. There,
The first optical element has one fitting shape formed on one corresponding surface of the positioning holding member facing the exit surface at a peripheral portion of an effective region through which the effective light beam passes on the one exit surface of the first optical element. Self-fitting shape part corresponding to the part is provided,
The second optical element has another fitting shape formed on another corresponding surface of the positioning holding member facing the incident surface at a peripheral portion of the effective region through which the effective light beam passes on the first incident surface of the second optical element. Self-fitting shape part corresponding to the part is provided,
In the positioning holding member, an optical aperture opening that allows the light beam to pass between the one corresponding surface and the other corresponding surface is formed in a predetermined portion.
One of the peripheral portions of the first optical element and the peripheral portion of the optical diaphragm opening of the one corresponding surface of the positioning holding member is in contact with the predetermined peripheral portion of the one exit surface. A first attitude adjustment unit comprising a plurality of protrusions that adjusts the attitude by adjusting an inclination angle of a facing surface between the one exit surface of the first optical element and the one corresponding surface of the positioning holding member by contact with each other. Is formed, and
One of the peripheral portions of the second optical element and the peripheral portion of the optical aperture opening on the other corresponding surface of the positioning holding member is contacted with the predetermined peripheral portion of the one incident surface of the second optical element. A second attitude adjustment unit comprising a plurality of protrusions that adjust the attitude by adjusting the inclination angle of the opposing surface between the one incident surface of the second optical element and the other corresponding surface of the positioning holding member by contacting with each other. Is formed,
An optical element assembly characterized by the above. The fitting shape portion of the first optical element and the fitting shape portion of the second optical element comprise convex portions; and
The one fitting shape portion formed on the one corresponding surface of the positioning holding member and the other fitting shape portion formed on the other corresponding surface of the positioning holding member are formed of a concave portion.
The optical element assembly according to claim 1. A light-shielding filler is formed in a gap formed between the one exit surface of the first optical element and the one corresponding surface of the positioning holding member by the plurality of protrusions of the first attitude adjustment unit. Being filled,
A light-shielding filler is formed in a gap formed between the one incident surface of the second optical element and the other corresponding surface of the positioning holding member by the plurality of protrusions of the second attitude adjustment unit. Filled,
The optical element assembly according to claim 1, wherein the optical element assembly is an optical element assembly. The aperture forming portion around the aperture constituting the optical aperture aperture gradually decreases in dimension in the thickness direction toward the periphery of the aperture in a section along the radial direction of the aperture, and is relatively small at the end portion forming the aperture periphery. It is molded to form a shape that reaches the peripheral edge dimension.
The optical element assembly according to claim 1, wherein the optical element assembly is an optical element assembly. The optical aperture opening is covered with a light transmitting member that functions as an infrared blocking filter.
The optical element assembly according to claim 1, wherein the optical element assembly is an optical element assembly. The light transmitting member is an adhesive filled in the optical aperture opening.
The optical element assembly according to claim 5. The positioning holding member is made of a light transmissive material having an infrared shielding function,
On the other corresponding surface of the positioning and holding member, a light shielding film is formed in a predetermined region portion excluding a region functioning as the optical aperture opening,
The optical element assembly according to claim 1, wherein the optical element assembly is an optical element assembly. The positioning holding member is made of a light transmissive material,
The one corresponding surface of the positioning and holding member is covered with a film that functions as an infrared shielding filter in a predetermined area including an area that functions as the optical aperture opening,
On the other corresponding surface of the positioning and holding member, a light shielding film is formed in a predetermined region portion excluding a region functioning as the optical aperture opening,
The optical element assembly according to claim 1, wherein the optical element assembly is an optical element assembly. A first optical element predetermined incident light arriving on one of the incident surface is configured prism to exit from a given one of the exit surface and reflected at a predetermined back reflecting surface with a power from the object side , first it is constructed prism so that the incident light coming from the first optical element side in a predetermined one of the incident surface is emitted from a predetermined one of the exit surface and reflected at a predetermined back reflecting surface with a power Two optical elements, and a positioning holding member for maintaining and holding the relative positions of both the first optical element and the second optical element in a predetermined relationship,
The first optical element has one fitting shape formed on one corresponding surface of the positioning holding member facing the exit surface at a peripheral portion of an effective region through which the effective light beam passes on the one exit surface of the first optical element. Self-fitting shape part corresponding to the part is provided,
The second optical element has another fitting shape formed on another corresponding surface of the positioning holding member facing the incident surface at a peripheral portion of the effective region through which the effective light beam passes on the first incident surface of the second optical element. Self-fitting shape part corresponding to the part is provided,
In the positioning holding member, an optical aperture opening that allows the light beam to pass between the one corresponding surface and the other corresponding surface is formed in a predetermined portion.
One of the peripheral portions of the first optical element and the peripheral portion of the optical diaphragm opening of the one corresponding surface of the positioning holding member is in contact with the predetermined peripheral portion of the one exit surface. A first attitude adjustment unit comprising a plurality of protrusions that adjusts the attitude by adjusting an inclination angle of a facing surface between the one exit surface of the first optical element and the one corresponding surface of the positioning holding member by contact with each other. Is formed, and
One of the peripheral portions of the second optical element and the peripheral portion of the optical aperture opening on the other corresponding surface of the positioning holding member is contacted with the predetermined peripheral portion of the one incident surface of the second optical element. A second attitude adjustment unit comprising a plurality of protrusions that adjust the attitude by adjusting the inclination angle of the opposing surface between the one incident surface of the second optical element and the other corresponding surface of the positioning holding member by contacting with each other. Is formed,
An optical element assembly;
An image sensor that photoelectrically converts a light image generated by the light beam emitted from the first exit surface of the second optical element of the optical element assembly; and
Image data generating means for processing the signal photoelectrically converted by the image sensor and generating image data;
An imaging apparatus comprising: The optical aperture opening is covered with a light transmitting member that functions as an infrared blocking filter.
The imaging apparatus according to claim 9. The positioning holding member is made of a light transmissive material,
The one corresponding surface of the positioning and holding member is covered with a film that functions as an infrared shielding filter in a predetermined area including an area that functions as the optical aperture opening,
On the other corresponding surface of the positioning and holding member, a light shielding film is formed in a predetermined region portion excluding a region functioning as the optical aperture opening,
The imaging apparatus according to claim 9. A first optical element predetermined incident light arriving on one of the incident surface is configured prism to exit from a given one of the exit surface and reflected at a predetermined back reflecting surface with a power from the object side , first it is constructed prism so that the incident light coming from the first optical element side in a predetermined one of the incident surface is emitted from a predetermined one of the exit surface and reflected at a predetermined back reflecting surface with a power Two optical elements, and a positioning holding member for maintaining and holding the relative positions of both the first optical element and the second optical element in a predetermined relationship,
The first optical element has one fitting shape formed on one corresponding surface of the positioning holding member facing the exit surface at a peripheral portion of an effective region through which the effective light beam passes on the one exit surface of the first optical element. Self-fitting shape part corresponding to the part is provided,
The second optical element has another fitting shape formed on another corresponding surface of the positioning holding member facing the incident surface at a peripheral portion of the effective region through which the effective light beam passes on the first incident surface of the second optical element. Self-fitting shape part corresponding to the part is provided,
In the positioning holding member, an optical aperture opening that allows the light beam to pass between the one corresponding surface and the other corresponding surface is formed in a predetermined portion.
One of the peripheral portions of the first optical element and the peripheral portion of the optical diaphragm opening of the one corresponding surface of the positioning holding member is in contact with the predetermined peripheral portion of the one exit surface. A first attitude adjustment unit comprising a plurality of protrusions that adjusts the attitude by adjusting an inclination angle of a facing surface between the one exit surface of the first optical element and the one corresponding surface of the positioning holding member by contact with each other. Is formed, and
One of the peripheral portions of the second optical element and the peripheral portion of the optical aperture opening on the other corresponding surface of the positioning holding member is contacted with the predetermined peripheral portion of the one incident surface of the second optical element. A second attitude adjustment unit comprising a plurality of protrusions that adjust the attitude by adjusting the inclination angle of the opposing surface between the one incident surface of the second optical element and the other corresponding surface of the positioning holding member by contacting with each other. Is formed,
An optical element assembly;
An optical image forming optical system for connecting a light image by a light beam emitted from the one exit surface of the second optical element of the optical element assembly;
An imaging apparatus comprising: The aperture forming portion around the aperture constituting the optical aperture of the positioning holding member of the optical element assembly is gradually reduced in dimension in the thickness direction toward the periphery of the aperture in a cross section along the radial direction of the aperture. It is shaped to form a shape that reaches a relatively small peripheral edge dimension at the peripheral edge.
The imaging apparatus according to claim 12.

Images