JPH0537588Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a mounting structure for a solid-state image sensor, and particularly to a mounting structure for a solid-state image sensor used in a television camera or the like.

[Background of the idea]

As is well known, a color television camera converts the subject light from the photographing lens into R (red) using a color separation prism.
component, G (green) component, and B (blue) component, extract electrical signals of each color component using a solid-state image sensor such as a CCD, or an image pickup tube, and process this in an image signal processing circuit. The image of the subject is displayed on the TV screen. and
A solid-state image sensor such as a CCD is attached by adhesive or screwed with a fixing metal fitting while being adjusted to match the optical axis of the photographing lens and the optical axis of the prism. After adjustment, the gap between the output end of the prism and the CCD is bonded with a spacer interposed to maintain this gap. Conventionally, several types of flat plate spacers have been prepared in advance and selected and used depending on the gap. However, this method has disadvantages in that several types of spacers must be prepared in advance, and it takes time to select the spacers. Furthermore, a flat plate spacer cannot have continuous dimensions, and has the disadvantage that the dimensions become stepwise.

[Purpose of invention]

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a mounting structure for a solid-state image sensor, which allows a solid-state image sensor such as a CCD to be easily mounted.

[Summary of the idea]

In order to achieve the above object, the present invention forms the output end side of the color separation prism into an inclined surface with respect to the output optical axis of the color separation prism, and the prism output end side of the spacer is formed on the output side of the color separation prism. The color separation prism and the solid-state image sensor are bonded together by arranging the spacer, which is formed into an inclined surface with respect to the output optical axis and inserted from at least two directions between the color separation prism and the solid-state image sensor. There is.

[Example of idea]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a mounting structure for a solid-state image sensor according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the operation of attaching a CCD as a solid-state image sensor to a color separation prism of a television camera. Mounting jig base plate 1
A bracket 12 is erected at 0, and the front panel 13 of the television camera is mounted on this bracket 12.
Lens mount 14, color separation prism holding frame 1
A photographic lens 16 is mounted on the lens mount 14, and a color separation prism 18 is mounted within the frame 15. After the color separation prism 18 is mounted on the mounting plate 34, it is housed in the frame 15. CCDs 20 are attached to each of the three emission ends of the color separation prism 18 in order to extract electrical signals of R, G, and B components. The CCD 20 is held by a holder 22 that is movably provided on the base plate 10 of the mounting jig, and the holder 22 is used to adjust the vertical and horizontal optical axis alignment. It is attached to the output end of the color separation prism 18 with a necessary gap therebetween. A lead wire 24 for transmitting electrical signals of color components of the CCD 20 has one end connected to the CCD 20 via a connector 21, and the other end connected to a control unit 26 containing an image processing circuit, and an image processed by this control unit 26 is connected to the CCD 20 through a connector 21. Based on the signal, the subject from the photographic lens 16 is displayed on the monitor television 28.

In Figure 2, the adjustment direction of the CCD 20 is shown, and according to this, the CCD is adjusted in three axes (X, Y,
Z), and the rotation directions of the three axes (RX, RY, RZ) are required.

FIG. 3 shows the detailed structure of the mounting portion of the CCD 20. A bracket 30 made of glass is provided on each output end face of the prism 18, and an inclined surface 30A is formed at each corner of the bracket 30, which is made of glass or made of a material similar to the thermal expansion of glass. On the other hand, as shown in FIG. 3, the spacer 19 has a vertical surface 19A formed on its right side, but an inclined surface 19B inclined with respect to the output optical axis on its left side. As can be seen from FIG. 3, the inclined surface 30A and the inclined surface 19B are formed with substantially equal inclination angles. In such a structure, the CCD 20 is adjusted in three axial directions and the rotational directions of the three axes, and the bracket 30 and CCD 2
After adjusting the air gap between spacer 0 and spacer 1 correctly,
Apply adhesive to both sides 19A and 19B of 9, and
As shown in the figure, the bracket 30 of the prism 18 and
It is inserted into the gap between the bracket 30 and the CCD 20, and the bracket 30 and the CCD 20 are bonded together via the spacer 19. With this configuration, even if the gap between the end face of the bracket 30 and the end face of the CCD 20 varies, at least one side surface 1 of the spacer 19
Since 9B is configured as an inclined surface, the inclined surface 19B of the spacer 19 and the inclined surface 30A of the bracket 30 are in surface contact or line contact, and both can be easily bonded with one spacer 19, not shown. By inserting a spacer 19 of the same shape from opposite directions, the prism 18 and CCD 20
It is possible to maintain the necessary gap between the

After bonding, remove the optical system from the jig, and then attach the CCD
Prism and CCD20 are used to prevent dust on the imaging surface of
The gap between the two is sealed with a silicone sealant or the like.

In the embodiment of FIG. 3, the inclined surface 1 of the spacer 19
9B is formed to be equal to the inclined surface 30A of the bracket 30, but as in the embodiment shown in FIG.
The angles of B and 30A may be made different.

In the embodiments shown in FIGS. 3 and 4, an inclined surface 19B is formed on one side of the spacer 19, but the same effect can be obtained by using an arcuate surface 19C as shown in FIG. Furthermore, in the case of the circular arc surface 19C, since the contact surface is formed in a circular arc shape,
This has the advantage that it does not require as much precision as the inclined surface 19B.

According to the above embodiment, since the CCD 20 is bonded to the prism via an adhesive, the prism side is not heated unlike brazing or the like, so there is no risk of the optical axis or the like on the prism side being deviated.

[Effect of idea]

As explained above, according to the mounting structure of the solid-state image sensor according to the present invention, the color separation prism and the solid-state image sensor are bonded together via a spacer having an inclined surface on the color separation prism side. Even if the spacing between the elements is different, it can be handled with one type of spacer.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing how the image sensor is attached to the color separation prism, Fig. 2 is a perspective view showing the adjustment direction of the solid-state image sensor, and Fig. 3 is an enlarged view showing the mounting structure of the solid-state image sensor according to the present invention. 4 and 5 are enlarged views showing the structure of other embodiments of the present invention. 18...prism, 19...spacer, 20...
...solid-state image sensor, 30...bracket.

Claims (1)

[Scope of Claim for Utility Model Registration] In a mounting structure for a solid-state photographic element, in which the solid-state photographic element is attached via a spacer to the output end of a color separation prism that separates object light from a photographic lens into a plurality of wavelength range components, the above-mentioned The output end side of the color separation prism is formed to be an inclined surface with respect to the output optical axis of the color separation prism, and the prism output end side of the spacer is formed to be an inclined surface with respect to the output optical axis of the color separation prism. A mounting structure for a solid-state imaging device, characterized in that the spacer inserted from at least two directions is arranged between the color separation prism and the solid-state imaging device to bond the color separation prism and the solid-state imaging device.