JP2024085633A - Imaging apparatus - Google Patents

Abstract

To prevent an unnecessary light beam from intruding into an imaging element, while avoiding an increase in size.SOLUTION: An imaging unit 40 of an imaging apparatus 10 includes an imaging element 41, an optical member 46 which is arranged on an incident optical path to the imaging element 41, a sheet mask 45 which is a light shielding member for cutting the incidence of the unnecessary light beam onto the imaging element 41, and an optical member holding member 44 which holds the optical member 46 and the sheet mask 45. The optical member 46 is arranged close to the imaging element 41. The sheet mask 45 has a substantially rectangular frame shape having a substantially rectangular opening 45a and is held in a state of being interposed between the optical member 46 and the optical member holding member 44 which are adhered by an adhesive.SELECTED DRAWING: Figure 5

Description

The present invention relates to an imaging device.

In an imaging device that captures an image using an image sensor such as a CMOS sensor, it is necessary to prevent unnecessary light rays from entering the image sensor. For example, Patent Document 1 discloses a lens unit in which an optical filter is placed at the end of a lens barrel having multiple lenses that faces the image sensor, and a light-shielding ring is sandwiched between the end face of the lens barrel and the optical filter. Patent Document 1 also discloses that a lens unit with a light-shielding ring is screwed into a unit that holds the image sensor, and the light-shielding ring is placed in front of the image sensor, thereby preventing unnecessary light from entering the image sensor.

JP 2016-184082 A

Digital cameras are an example of imaging devices, and in recent years, mirrorless cameras, which are compact and thin because they do not have a reflex mirror, have become popular. Even in mirrorless cameras, it is necessary to prevent unwanted light from entering the imaging element.

Here, in the technology disclosed in the above-mentioned Patent Document 1, since it is necessary to screw the unit holding the light-shielding member into the unit holding the image sensor, a light-shielding ring having an annular shape is used as the light-shielding member. When the light-shielding ring is placed close to the image sensor, it is necessary to set the inner diameter of the light-shielding ring to a length that does not prevent light from entering the effective pixel area of the image sensor. In this case, when the light-shielding ring and the image sensor are viewed from the optical axis direction, there is always a space between each side of the image sensor and the inner circumference of the light-shielding ring, so there is a risk that it is not possible to sufficiently prevent unnecessary light from entering the image sensor. In addition, since it is necessary to provide the threaded portion for screwing each unit into the unit outside the inner diameter of the light-shielding ring, there is a concern that each unit may become large.

The present invention was made in consideration of these circumstances, and aims to provide an imaging device that can more reliably prevent unwanted light rays from entering the imaging element while avoiding an increase in size.

The imaging device according to the present invention is an imaging device including an imaging unit, the imaging unit including an imaging element, a first optical member arranged in an incident optical path to the imaging element, a light blocking member that blocks unwanted light rays from entering the imaging element, and a holding member that holds the first optical member and the light blocking member, the first optical member being arranged close to the imaging element, the light blocking member having a substantially rectangular frame shape with a substantially rectangular opening, and being held in a state sandwiched between the first optical member and the holding member that are bonded with an adhesive.

The present invention provides an imaging device that can more reliably prevent unwanted light rays from entering the imaging element while avoiding an increase in size.

1 is a perspective view showing an external appearance of an imaging device according to an embodiment. FIG. 2 is an exploded perspective view showing a configuration of the imaging device. FIG. 2 is an exploded perspective view showing a configuration of an imaging unit included in the imaging device. 2 is a front view of the imaging unit and a cross-sectional view taken along line AA. FIG. FIG. 2 is a front view of the imaging unit with some parts removed. FIG. 2 is a cross-sectional view of a shutter unit and an imaging unit. FIG. 13 is a front view showing another embodiment of the imaging unit;

The following describes in detail an embodiment of the present invention with reference to the attached drawings.

1A and 1B are perspective views showing the appearance of an imaging device 100 according to an embodiment, with FIG. 1A being a view of the imaging device 100 seen obliquely from above and the front, and FIG. 1B being a view of the imaging device 100 seen obliquely from above and the rear. The imaging device 100 is a so-called mirrorless digital single-lens camera.

In the description of this embodiment, the imaging device 100 refers to the camera body of a mirrorless digital single-lens camera, and does not include a detachable imaging lens unit (interchangeable lens) for the camera body.

The front surface of the imaging device 100 (the surface facing the subject, not shown) is provided with a mount section 11 for attaching and detaching a photographing lens unit (not shown). The mount section 11 is provided with mount contacts 12 that enable communication of control signals, status signals, data signals, etc. between the imaging device 100 and the photographing lens unit, and also supplies power to the photographing lens unit. A lens unlock button 13 is also provided close to the mount section 11. A user of the imaging device 100 can remove the photographing lens unit from the imaging device 100 by rotating the photographing lens unit attached to the mount section 11 in a specified direction while pressing the lens unlock button 13.

On the left side of the imaging device 100 as viewed from the front side, a grip section 14 is provided for the photographer to hold the imaging device 100. On the top surface of the grip section 14, a release button 15 is provided for the photographer to instruct the imaging device 100 to start a shooting operation. On the top of the imaging device 100, a strobe unit 16 that pops up on the imaging device 100, a shoe groove 17 for attaching accessories such as an external strobe device, and a terminal group 18 are provided. Near the center of the back surface of the imaging device 100 (the surface facing the photographer, not shown), a color liquid crystal monitor 19 is provided for displaying live view images, captured images, menu screens for various settings of the imaging device 100, and the like. Note that the external configuration of the imaging device 100 is not directly related to the present invention, so a description of other parts and parts is omitted.

Figure 2 is an exploded perspective view showing the configuration of the imaging device 100, with Figure 2(a) being a view of the components constituting the imaging device 100 as seen obliquely from above and the front, and Figure 1(b) being a view of the components constituting the imaging device 100 as seen obliquely from above and the rear. Note that Figures 2(a) and (b) do not show the exterior components of the imaging device 100, and only show the main components of the imaging device 100.

The interior of the exterior (not shown) of the imaging device 100 is configured by arranging, in order from the front side to the rear side of the imaging device 100, a front base 21, a shutter unit 30, an imaging unit 40, a main board 50, and a main plate 60.

The front base 21 is a component that forms the framework of the imaging device 100. The shutter unit 30, the imaging unit 40, the main board 50, and the main plate 60 are fixed to the front base 21. A plurality of metallic coil-shaped compression springs 22 are arranged between the front base 21 and the imaging unit 40 as biasing members. When the imaging unit 40 is attached to the front base 21, the imaging unit 40 is biased backward by the compression springs 22. In other words, the compression springs 22 bias the imaging unit 40 in a direction that separates the imaging unit 40 from the front base 21. Note that the compression springs 22 are not limited to being made of metal, and may be made of resin.

The shutter unit 30 and the imaging unit 40 are fixed to the rear side of the front base 21 in that order, adjacent to each other from the front side of the imaging device 100. The shutter unit 30, which controls the exposure to the imaging element 41, has a shutter base plate 31 in which an opening 31a is formed. The imaging unit 40 is adjusted and fixed by a compression spring 22 so that a predetermined distance (gap) is provided between the imaging surface of the imaging element 41 and the mounting surface of the mount section 11, which serves as the mounting reference for the photographing lens unit, and the imaging surface is parallel.

The heat dissipation members 23, 24 are connected to the imaging unit 40 and disposed on the rear side of the front base 21. The heat dissipation members 23, 24 have a heat dissipation function of transferring heat generated by the imaging element 41 to the outside, and are made of, for example, sheet metal members made by pressing a metal such as a copper plate.

Figure 3 is an exploded perspective view showing the configuration of the imaging unit 40, with Figure 3(a) being a view of the imaging unit 40 seen from diagonally above the front, and Figure 3(b) being a view of the imaging unit 40 seen from diagonally above the rear. The imaging unit 40 is a unit in which the optical low-pass filter 48 and the imaging element 41, which will be described later, are unitized together with other components.

The imaging unit 40 is configured such that, from the front side to the rear side, an optical low pass filter 48, an optical member 46, a sheet-like light-shielding member 45, an optical member holding member 44, a sealing member 43, an imaging element holding member 42, and an imaging element unit 1 are arranged in this order. In the following description, the "sheet-like light-shielding member 45" is referred to as the "sheet mask 45."

The optical low-pass filter 48 is a birefringent plate made of quartz crystal, has a substantially rectangular shape as shown in Figs. 3(a) and (b), and is arranged in the incident light path to the image sensor 41. The surface of the optical low-pass filter 48 is optically coated. The optical member 46 arranged in the incident light path to the image sensor 41 on the rear side of the optical low-pass filter 48 is a glass part (infrared cut filter) having infrared absorbing ability, and has an optical coating on its surface like the optical low-pass filter 48. The optical member holding member 44 (first holding member) arranged on the rear side of the optical member 46 holds the optical low-pass filter 48 and the optical member 46. The optical member holding member 44 is a part made of resin or metal, and has a substantially rectangular opening 44a.

In FIG. 3(a), a substantially rectangular frame-shaped adhesive member 47 is shown on the back side of the optical low pass filter 48. The adhesive member 47 is attached to the outside of the effective imaging area of the optical low pass filter 48, thereby serving to tightly attach the optical low pass filter 48 to the optical member holding member 44. In addition, the optical low pass filter 48 has a chamfered portion 48a at the upper left corner when viewed from the front side, which will be described in detail later, to facilitate alignment with the optical member holding member 44.

The optical member 46 is adhered and fixed to the optical member holding member 44 so as to cover the opening 44a of the optical member holding member 44. At this time, a sheet mask 45 is placed between the optical member 46 and the optical member holding member 44 so as to contact the surface of the optical member 46 that faces the image sensor 41. The sheet mask 45 is a light-shielding member that blocks unnecessary light rays to the image sensor 41, and has a substantially rectangular frame shape with a substantially rectangular opening 45a. The sheet mask 45 is, for example, a polyimide sheet, but is not limited to this.

The sealing member 43 arranged on the back side of the optical member holding member 44 is adhered to and held by the optical member holding member 44. The sealing member 43 is, for example, a molded body made of an elastic material such as a high molecular weight polymer such as urethane foam or plastic, but is not limited to these and may be made of rubber, elastomer, etc. In this embodiment, the optical member holding member 44 and the sealing member 43 are separate members, but they may be configured as a single component as an integrally molded product.

The image sensor holding member 42 (second holding member) has a substantially rectangular opening 42a. The image sensor holding member 42 holds the optical member holding member 44. The image sensor unit 1 is fixed to the image sensor holding member 42 using an adhesive.

The imaging element unit 1 is an integrated unit in which the imaging element 41 is mounted on a wiring board by automatic mounting. The exterior of the imaging element 41 is covered by a package that acts as a housing, and the front surface of the package is configured by a glass window. A CMOS sensor is used as the imaging element 41, but this is not limited thereto, and a CCD sensor or CID sensor may also be used.

Heat dissipation members 23, 24 are attached to the image sensor holding member 42. The image sensor holding member 42 may be made of resin or metal, but by using a metal member, the effect of transferring heat generated by the image sensor 41 to the heat dissipation members 23, 24 can be increased, thereby suppressing deterioration in image quality due to heat generation (temperature rise) of the image sensor 41.

A metal biasing member 49 is fixed to the image sensor holding member 42 and the optical member holding member 44 with screws. The metal biasing member 49 has an appropriate biasing force, and a spring portion 49c (described later) of the metal biasing member 49 presses against the optical low pass filter 48.

Figure 4(a) is a front view of the imaging unit 40, and Figure 4(b) is a cross-sectional view along the arrow A-A shown in Figure 4(a). Here, line A-A passes through the center of the imaging element 41 and includes a line parallel to the long side of the imaging element 41. Figure 5(a) is a front view of the imaging unit 40 disassembled down to the optical member 46, and Figure 5(b) is a front view of the imaging unit 40 disassembled down to the sheet mask 45. Hereinafter, the projection plane passing through the center of the imaging element 41 and viewed from a direction perpendicular to the imaging surface of the imaging element 41 will be referred to as the optical axis projection plane.

First, the assembly of the imaging element unit 1 to the imaging element holding member 42 will be described. As shown in Figs. 3(a) and (b), the imaging element unit 1 is assembled to the imaging element holding member 42 from the rear side of the imaging element holding member 42 so that the imaging element 41 enters the opening 42a of the imaging element holding member 42. At this time, the imaging element holding member 42 is fixed with a jig or the like, and the imaging element unit 1 is aligned in the assembly direction with respect to the imaging element holding member 42 using a position adjustment jig, thereby determining the relative positions of the imaging element unit 1 and the imaging element holding member 42 in the assembly direction. In addition, the position of the imaging element unit 1 is adjusted in the direction parallel to the imaging surface with respect to the imaging element holding member 42 so that the center of the photoelectric conversion unit inside the imaging element 41 is located in an ideal position in design with respect to the imaging element holding member 42.

Next, the assembly of the optical member holding member 44 to the imaging element holding member 42 will be described. An elastic sealing member 43 is adhered and held on the optical member holding member 44 so as to surround the opening 44a. As shown in FIG. 4B, the sealing member 43 is assembled and held so as to abut against the cover glass 41a held by the imaging element holding member 42. At this time, the sealing member 43 is elastically deformed (compressed) until the optical member holding member 44 and the imaging element unit 1 are spaced apart by a predetermined distance, so that the space from the optical member holding member 44 to the imaging element unit 1 (the space between the cover glass 41a and the optical member 46) is sealed.

Next, the assembly of the optical member 46 and the optical low pass filter 48 to the optical member holding member 44 will be described. As can be seen from Figures 3(a) and (b), the optical member 46 and the optical low pass filter 48 are assembled in this order to the front side of the optical member holding member 44. Between the optical member holding member 44 and the optical member 46 that is assembled to the optical member holding member 44 first, a sheet mask 45 that cuts out unnecessary light rays to the image sensor 41 is arranged close to the image sensor 41.

As shown in FIG. 4(b), the opening 45a of the sheet mask 45 is smaller than the opening 44a of the optical member holding member 44, and determines the opening area for the image sensor 41. Also, as shown in FIG. 3(b) and FIG. 5(b), the sheet mask 45 is provided with a phase protrusion 45b, and is configured so that the phase protrusion 45b fits into the cutout portion 44b provided in the optical member holding member 44.

Then, the optical member 46 is assembled so as to overlap the optical member holding member 44 and the sheet mask 45. As shown in FIG. 5(a), the positioning protrusions 44c on the optical member holding member 44 fit into the outer periphery 46a of the optical member 46, so that the optical member 46 is positioned with high precision. Similarly, the sheet mask 45 is positioned with high precision by fitting multiple positioning protrusions 44c into the outer periphery 45c of the sheet mask 45. Then, as shown in FIG. 4(b), the optical member 46 is adhered and held to the optical member holding member 44 by adhesive 401 applied to the grooves 44d on the optical member holding member 44.

As shown in FIG. 5(b), the sheet mask 45 has a mask cutout 45d in at least a part of the area where the optical member 46 and the optical member holding member 44 overlap on the optical axis projection plane. Therefore, the outer shape of the sheet mask 45 is smaller than the outer shape of the optical member 46 only in the application range of the adhesive 401. The optical axis projection plane is the projection plane when viewed from a direction that passes through the center of the image sensor 41 and is perpendicular to the imaging surface of the image sensor 41.

Also, as shown in FIG. 4(b), the optical member holding member 44 has a groove 44d adjacent to the flat portion 44e on which the sheet mask 45 is superimposed, i.e., which is in contact with the sheet mask 45. In this way, the mask cutout 45d and the groove 44d are provided to prevent the adhesive 401 from penetrating between the flat portion 44e and the sheet mask 45 and flowing into the opening 44a. The mask cutout 45d also allows the adhesive 401 to flow around the space formed between the flat portion 44e and the optical member 46. Therefore, by providing the mask cutout 45d, it is possible to obtain the effect of improving the adhesive strength of the optical member 46 to the optical member holding member 44 while maintaining the overall rigidity of the sheet mask 45.

In this embodiment, an ultraviolet-curing resin is used as the adhesive 401, but the adhesive that can be used is not limited to this, and for example, a thermosetting or two-part adhesive may be used. In this embodiment, the groove 44d of the optical member holding member 44 is formed so as not to be blocked by the optical member 46 so that ultraviolet light can be appropriately irradiated onto the ultraviolet-curing adhesive applied to the groove 44d. The optical member holding member 44, the sheet mask 45, and the optical member 46 are rectangular and overlap each other all around, so that the space on the imaging element unit 1 side is sealed off from these.

Furthermore, an optical low pass filter 48 is incorporated into the optical member holding member 44 so as to cover the optical member 46. As shown in FIG. 4(a), the optical low pass filter 48 is provided with a chamfered portion 48a, and the optical low pass filter 48 can be aligned with respect to the optical member holding member 44 by the chamfered portion 48a and the chamfered portion 44f provided on the optical member holding member 44. Furthermore, the optical low pass filter 48 is positioned with high precision on the optical member holding member 44 by fitting a plurality of positioning protrusions 44g provided on the optical member holding member 44 with the outer periphery 48b of the optical low pass filter 48. After being positioned in this way, the optical low pass filter 48 is adhered and held on the optical member holding member 44 by an adhesive member 47 having a substantially rectangular frame shape.

Then, the metal biasing member 49 is assembled to the optical member holding member 44. The metal biasing member 49 has a positioning hole portion 49a, a vibration prevention hole portion 49b, and a spring portion 49c. Meanwhile, the optical member holding member 44 has a positioning shaft portion 44h and a vibration prevention shaft portion 44i. The positioning hole portion 49a and the vibration prevention hole portion 49b are fitted into the positioning shaft portion 44h and the vibration prevention shaft portion 44i, respectively, so that the metal biasing member 49 is positioned on the optical member holding member 44, and the metal biasing member 49 is fixed to the optical member holding member 44 by a fixing screw. At this time, the spring portion 49c of the metal biasing member 49 is biased against the optical low pass filter 48, and the metal biasing member 49 is electrically connected to the optical low pass filter 48. This prevents the optical low pass filter 48 from becoming charged.

Next, the arrangement of the shutter unit 30 and the imaging unit 40 will be described. Figure 6 is a cross-sectional view of the shutter unit 30 and the imaging unit 40, showing a cross section at a position corresponding to the arrow A-A in Figure 4(a).

As described above, the shutter unit 30 and the imaging unit 40 are fixed to the rear side of the front base 21. The opening 31a of the shutter base plate 31 of the shutter unit 30 is arranged close to the imaging unit 40 and is formed so as to be able to cut unnecessary incident light in the same manner as the sheet mask 45 without cutting off necessary incident light to the imaging element 41. In addition, the opening 31a of the shutter base plate 31 has a shape and size that can cut incident light to the adhesive 401, thereby suppressing deterioration of the adhesive 401 due to sunlight, etc., and the incidence of secondary reflected light from the adhesive 401 to the imaging element 41. Note that the method of suppressing irradiation of incident light to the adhesive 401 is not limited to the method determined by the shape and size of the opening 31a provided in the shutter base plate 31, and may be realized, for example, by equipping a light-shielding member to a separate unit close to the imaging unit 40.

Next, another embodiment of the imaging unit 40 will be described. FIG. 7 is a front view of an imaging unit 70, which is another embodiment of the imaging unit 40, disassembled down to the optical member 46 in the same manner as FIG. 5(a). Note that the only difference between the imaging unit 40 and the imaging unit 70 is the adhesive configuration between the optical member holding member 44 and the optical member 46, and the following description will focus on this difference.

As shown in Figures 3(a) and (b), the optical member 46 and the optical low-pass filter 48 are attached to the optical member holding member 44 in this order from the front side. A sheet mask 45 having an opening 45a formed therein for cutting off unnecessary light rays reaching the image sensor 41 is disposed between the optical member 46, which is attached to the optical member holding member 44 first, and the optical member holding member 44.

5, the opening 45a of the sheet mask 45 is smaller than the opening 44a of the optical member holding member 44, and determines the opening for the image sensor 41. Also, as shown in FIG. 3B and FIG. 5B, the sheet mask 45 is provided with a phase protrusion 45b, and the phase protrusion 45b fits into the cutout portion 44b provided in the optical member holding member 44. The optical member 46 is assembled to the optical member holding member 44 so as to overlap with the sheet mask 45. Note that, as shown in FIG. 5A, the optical member 46 is positioned with high accuracy relative to the optical member holding member 44 by fitting the outer periphery 46a of the optical member 46 into the positioning protrusion 44c provided in the optical member holding member 44. At this time, the sheet mask 45 is also positioned with high accuracy by fitting the outer periphery 45c of the sheet mask 45 into the multiple positioning protrusions 44c.

Here, as shown in FIG. 7, chamfered portions 46b are provided at the four corners (corners) of the optical member 46 having a substantially rectangular shape. Adhesive 402 is applied to the four spaces formed by the four chamfered portions 46b, one cutout portion 44b and three corners 44j provided in the optical member holding member 44, and the optical member 46 is adhered to and held by the optical member holding member 44. In this way, by applying adhesive 402 to the four corners of the optical member 46, it is possible to avoid an increase in size of the optical member holding member 44 compared to the above-mentioned configuration in which grooves 44d for applying adhesive 401 are provided in the up, down, left, and right directions. In turn, it is possible to avoid an increase in size of the imaging device 100.

In addition, the optical member holding member 44, the sheet mask 45, and the optical member 46 have a substantially rectangular shape and are overlapped all around, ensuring that the space formed from these components on the imaging element unit 1 side is airtight.

The disclosure of this embodiment includes the following configuration.
[Configuration 1] An imaging device comprising an imaging unit, the imaging unit comprising an imaging element, a first optical member arranged in an incident optical path to the imaging element, a light-shielding member that cuts off unwanted light rays entering the imaging element, and a holding member that holds the first optical member and the light-shielding member, the first optical member being arranged in close proximity to the imaging element, the light-shielding member having a substantially rectangular frame shape with a substantially rectangular opening, and being held in a state sandwiched between the first optical member and the holding member, which are bonded with an adhesive.
[Configuration 2] The imaging device according to configuration 1, wherein the light blocking member is disposed so as to be in contact with a surface of the first optical member that faces the imaging element.
[Configuration 3] The imaging device described in configuration 1 or 2, characterized in that the light-shielding member has a cutout portion in at least a portion of the range where the first optical member and the holding member overlap on the optical axis projection plane.
[Configuration 4] An imaging device described in any one of configurations 1 to 3, characterized in that the holding member has a planar portion on which the light-shielding member and the first optical member are arranged in an overlapping manner on an optical axis projection plane, and a groove portion formed adjacent to the planar portion.
[Configuration 5] The imaging device according to claim 4, wherein the adhesive is applied to the groove portion.
[Configuration 6] An imaging device as described in configuration 1 or 2, characterized in that the first optical member has an approximately rectangular shape and has cutout portions at the four corners, and the adhesive is applied to the area formed by the cutout portions and the holding member.
[Configuration 7] An imaging device described in any one of configurations 1 to 6, further comprising a shutter unit that controls exposure to the imaging element, the opening of the shutter unit being of a size capable of cutting off light incident on the adhesive.
[Configuration 8] An imaging device described in any one of configurations 1 to 7, characterized in that the imaging unit has a second optical member arranged in the incident optical path at a position farther from the imaging element than the first optical member, the first optical member being an infrared cut filter, and the second optical member being an optical low-pass filter.
[Configuration 9] The imaging device according to any one of configurations 1 to 8, wherein the light blocking member is made of polyimide.
[Configuration 10] The imaging device according to any one of configurations 1 to 9, wherein the adhesive is an ultraviolet-curing resin.

The present invention has been described above in detail based on preferred embodiments, but the present invention is not limited to these specific embodiments, and various forms within the scope of the gist of the invention are also included in the present invention. Furthermore, each of the above-mentioned embodiments merely represents one embodiment of the present invention, and each embodiment can be combined as appropriate.

REFERENCE SIGNS LIST 1 Image pickup element unit 21 Front base 30 Shutter unit 40, 70 Image pickup unit 41 Image pickup element 42 Image pickup element holding member 44 Optical member holding member 45 Sheet mask 46 Optical member 47 Adhesive member 48 Optical low-pass filter 100 Image pickup device 401, 402 Adhesive

Claims (10)

An imaging device including an imaging unit,
The imaging unit includes:
An imaging element;
A first optical member disposed on an incident optical path to the image sensor;
a light blocking member that blocks unnecessary light from entering the imaging element;
a holding member that holds the first optical member and the light blocking member,
the first optical member is disposed adjacent to the imaging element;
An imaging device characterized in that the light-shielding member has a substantially rectangular frame shape with a substantially rectangular opening, and is held in a sandwiched state between the first optical member and a holding member, which are bonded with an adhesive. The imaging device according to claim 1, characterized in that the light blocking member is arranged so as to contact the surface of the first optical member that faces the imaging element. The imaging device according to claim 1 or 2, characterized in that the light blocking member has a notch in at least a portion of the range where the first optical member and the holding member overlap on the optical axis projection plane. The holding member is
a planar portion on which the light blocking member and the first optical member are arranged so as to overlap on an optical axis projection plane;
3. The imaging device according to claim 1, further comprising a groove portion formed adjacent to the flat portion. The imaging device according to claim 4, characterized in that the adhesive is applied to the groove portion. the first optical member has a substantially rectangular shape and has cutouts at four corners;
3. The imaging device according to claim 1, wherein the adhesive is applied to an area defined by the notch and the holding member. a shutter unit for controlling exposure to the image sensor;
3. The imaging device according to claim 1, wherein the opening of the shutter unit has a size capable of blocking light incident on the adhesive. the imaging unit includes a second optical member disposed on the incident optical path at a position farther from the imaging element than the first optical member;
3. The imaging device according to claim 1, wherein the first optical member is an infrared cut filter, and the second optical member is an optical low-pass filter. The imaging device according to claim 1 or 2, characterized in that the light-shielding member is made of polyimide. The imaging device according to claim 1 or 2, characterized in that the adhesive is an ultraviolet-curing resin.