JPH062381Y2 - Mounting device for solid-state image sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mounting device for a solid-state imaging device having a light reflection preventing structure.

[Outline of the Invention] In the present invention, light incident from an image pickup lens is generated during image formation on a solid-state image pickup device via an optical system. In order to remove harmful reflected light, so-called ghost, an edge is provided on the optical path side peripheral part of the solid-state image sensor mounting bracket that is attached to the prism for color separation, and the harmful light is cut by that edge to prevent internal reflection. The ghost, which is harmful to the image pickup screen, is removed. Further, the adhesive used to bond the prism and the solid-state image sensor mounting bracket leaks into the optical path to cause incident light to be refracted and reflected. . In order to remove the ghost, a groove is provided in the vicinity of the edge portion of the solid-state image sensor mounting bracket so that the adhesive does not protrude into the optical path portion, and the ghost is removed.

[Conventional technology]

As shown in FIG. 5, the conventional mounting structure of a solid-state image sensor is such that a second metal fitting 4 is attached to a first metal fitting 2 for mounting a solid-state image sensor that is adhesively fixed to each light emitting portion 1a of a prism 1. Then, the solid-state image sensor 5 is fixed to the third metal fitting 6 by using the screw 8 and the fourth metal fitting 7,
In this structure, the leg portions 4a and 6a of the metal fitting 4 and the third metal fitting 6 facing each other are joined with an adhesive, solder, or the like, and the solid-state imaging device 5 is attached to a predetermined position of the prism 1. Here, the removal of the ghost by the light reflection described above is performed by the light-shielding mask 11,
It is performed by the light-shielding hood 9.

FIG. 6 (a) shows a structure in which the light-shielding mask 11 is directly bonded and fixed to the light emitting portion 1a of the prism 1, and the prism 1 and the first metal fitting 2 for mounting the solid-state image sensor are bonded. In order to reduce the adhesive strength because the area is reduced or to reduce the size of the light shielding mask 11 as much as possible,
The bonding work is difficult and the reliability of the bonding is poor, leading to an increase in cost.

Further, as shown in FIG. 6B, in the structure in which the light shielding mask 11 is adhered to the first metal fitting 2 for mounting the solid-state image sensor, the plate of the first metal fitting 2 is provided between the prism 1 and the light shielding mask 11. Since there is a gap of thickness, the light emitting portion 1 of the prism 1 after the bonding work
Cleaning of a was difficult.

Further, as shown in FIG. 6 (c), when the light-shielding hood 9 made of a sealing material such as rubber also serves as the light-shielding mask 11, it is difficult to make the edge portion 9a of the light-shielding hood 9 that cuts unnecessary light into an acute angle. Therefore, the effect as a light-shielding mask is small, and when cleaning the prism 1, since the material is a rubber material, dust is easily generated, and it is difficult to keep the prism surface dust-free. .

[Problems to be solved by the device]

In order to solve these problems, the present invention stops the dedicated light-shielding mask and deforms the shape of the edge part of the metal fitting for mounting the solid-state image sensor that adheres to the prism, thereby functioning as a light-shielding mask.
Further, the present invention aims to realize a mounting device for a solid-state image pickup device, which has a structure having a function of preventing the adhesive from squeezing out, and which has an improved light-shielding effect and adhesive workability.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a sharp edge on the peripheral edge of the prism-side optical path opening side of the metal fitting for mounting a solid-state image sensor that is adhesively bonded to the prism. Here, when the light from the image pickup lens passes through the optical path opening of the metal fitting by the edge portion, the peripheral edge portion of the metal fitting on the solid-state image pickup device side of the metal fitting is formed so as to form a shadow with respect to the passing light. Constitute. Further, a groove is provided along the edge portion.

[Action]

As a result, it is possible to prevent reflected light, which is harmful to the image pickup screen, from re-entering the solid-state image sensor due to the edge provided on the periphery of the optical path opening side of the prism side of the bracket for fixing the solid-state image sensor fixed to the prism. In addition, since the adhesive can be prevented from sticking out to the opening of the optical path by providing a groove on the surface of the metal fitting that is adhered to the prism, a dedicated light-shielding mask is not required and a metal fitting for mounting the solid-state image sensor The bonding work and cleaning work of the will be facilitated and the yield will be improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. The overall configuration is as shown in FIG. 3, and the first metal fitting 2 for mounting the solid-state image pickup device of the present invention is adhesively fixed to the light emitting portions 1a of the prism 1 for the red, green and blue lights, respectively.

Here, as shown in FIGS. 1 and 2, the first metal fitting 2 is provided with an acute edge 2a on the side facing the prism 1 at the peripheral portion on the optical path opening side, and the optical path opening The dimension l is smaller than the dimension of the optical path opening on the side facing the solid-state image sensor 5 by Δl.
Since the edge 2a is narrowed, the peripheral edge portion on the solid-state image pickup device 5 side is shaded, and harmful reflected light can be prevented from re-entering the solid-state image pickup device 5.

Further, along the edge 2a, a groove 2b is provided slightly on the inner side of the surface to be bonded to the prism 1, and when the first metal fitting 2 is bonded to the prism 1, excess adhesive is not adhered to the optical path opening. Instead, it collects in this groove 2b. An example of processing the first metal fitting 2 is, as shown in FIGS. 4 (a) to (c),
After the metal plate has been contoured and punched (Fig. 4 (a)), plastic deformation is caused by pressing so that the edge 2a and the groove 2b are simultaneously formed (Figs. 4 (b), (c)). ) Will be possible.

A second metal fitting 4 for mounting a solid-state image sensor is fixed to the first metal fitting 2 with a mounting screw 3.

The solid-state image sensor 5 is a third solid-state image sensor mounting device.
It is fixed to the metal fitting 6 by the fourth metal fitting 7 and the mounting screw 8.

Further, a light shielding hood 9 having elasticity is provided in the optical path opening portion between the prism 1 and the solid-state image sensor 5 to prevent dust.

In the above configuration, each solid-state image sensor 5
After the alignment of the second metal fitting 4 and the third metal fitting 6
The leg portions 4a and 6a facing each other are joined and fixed with solder 10 or the like.

In the description of the present embodiment, the first solid-state image pickup device mounting
Although the metal fitting 2 and the second metal fitting 4 are separately configured and the edge 2a and the groove 2b are provided on the first metal fitting 2, the second metal fitting 4 is omitted without being limited to this configuration. The third metal fitting 6 may be directly joined to the metal fitting 2, and the fourth metal fitting 7 and the fixing structure using an adhesive that does not use the mounting screws 3 and 8 may be used. The mounting structure itself is not limited, and in short, the present invention provides a metal plate for mounting a solid-state image sensor, which is adhered to the light emitting portion of the prism, with a sharp edge on the peripheral edge of the optical path opening on the prism side. Any structure may be used as long as it has a groove.

[Effect of device]

As described above, according to the present invention, the following effects can be obtained.

1. By constructing the edge part with a light blocking effect with a simple structure, harmful light reflection can be prevented.

2. The groove prevents the adhesive from squeezing out into the optical path opening, improving workability and improving the production yield.

3. By eliminating the dedicated light-shielding mask, the adhesive area between the prism and the metal fitting for mounting the solid-state image sensor increases, so the adhesive strength is improved.

4. By eliminating the special light-shielding mask, there is no unnecessary gap in the optical path opening, and this cleaning can be done easily.

5. By reducing the number of components, it is possible to reduce the assembly work time and the component cost.

[Brief description of drawings]

FIG. 1 is a side sectional view of the present invention, FIG. 2 is a sectional view of an essential part of the present invention, FIG. 3 is an overall configuration diagram of the present invention, and FIG. 4 is a side for explaining a processing step of the present invention. Sectional views and side sectional perspective views, FIG. 5, and FIG. 6 are perspective views and side sectional views showing a conventional example. 1: prism, 2: first metal fitting for mounting solid-state image sensor,
2a: edge, 2b: groove, 5: solid-state image sensor.

Claims (1)

[Scope of utility model registration request] 1. A metal fitting for mounting a solid-state image pickup device is adhered and fixed to each light emitting part of a prism for color separation, and a solid-state image pickup device corresponding to each light emitting part of the prism is attached via the metal fitting. In the mounting device for a solid-state image sensor, the edge of the solid-state image sensor mounting bracket on the side of the optical path opening on the prism light emitting part side has an edge with an acute angle that also functions as a light-shielding mask for preventing light reflection in contact with the prism light emitting part. A mounting device for a solid-state imaging device, characterized in that a groove is provided along the edge.