JPH08307886A - Fixing structure of solid-state image pickup element and its fixing method - Google Patents

Abstract

PURPOSE: To facilitate back focus adjustment and registration adjustment with respect to a prism by pressing elastically a fixed image pickup element onto an element holder so as to assemble the element in a displacing enable way. CONSTITUTION: Each intermediate member is pressed elastically and fixed by overlapping sequentially a metal made plate element holder 7 with a solid-state image pickup element 5 onto a metal made plate element base 6 and screw- fitting the element base 6 with a screw 9 via a plate spring 8. In this case, a diameter of a throughhole 7b to which a mount stud 6d is inserted is selected sufficiently larger so that the element holder 7 is moved with respect to the element base 6. In the tentative assembling state, back focus in forward/ backward direction and a deflection in every direction are adjusted with respect to an optical axis of a color separation prism 1 and a metallic film 4 of the prism and a folded piece 6b are soldered. Furthermore, the element holder 7 is skided for 3-color registration adjustment and connecting pieces 6c , 7c , are soldered to fix the element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing a solid-state image pickup device such as a charge coupled device (CCD) used in a television camera or the like.

[0002]

2. Description of the Related Art Conventionally, in a television camera or the like, image pickup light of an object emitted from an optical system is red (R), green (G), blue (B) by a three-color separation prism (color separation prism). After being separated into the three primary colors, and subject images of each color component are photoelectrically converted into video signals of each color by three solid-state image pickup devices, various signal processing is performed from each image pickup output, for example, an NTSC composite color video signal. It is well known to obtain a (television signal).

The solid-state image pickup device for photoelectrically converting the subject image of each color component is fixed to each light emitting surface side through a pair of prism bases fixed to a color separation prism. These solid-state image sensors are accurately fixed in a state where back focus adjustment and μm-order registration adjustment are performed on each optical axis using a predetermined jig, and the work requires careful attention. It is a thing.

[0004]

By the way, the solid-state image pickup device is fixed to the light emitting surface side of the color separation prism after the above-mentioned back focus adjustment and various adjustments such as vertical and horizontal tilts have been completed. However, adhesives and screws are often used for fixing them.

However, the fixing work of the solid-state image pickup device with the adhesive is not only complicated and time-consuming, but also the adhesive enters between the device holder and the spacer and the position of the adjusted solid-state image pickup device is misaligned. There is a problem that ends up. Therefore, for example, as shown in Japanese Utility Model Application Laid-Open No. 59-39580, a pillar is erected, the pillar is fitted in a hole of a solid-state image pickup element, and a space between the pillar and the mounting hole is soldered to both Although there is a proposal to join them, although the joining work is relatively simple, it is difficult to erect the pillars on the prism, and there is a risk that solder will reach the surface side of the prism and the solid-state image sensor. It wasn't very effective.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first aspect of the present invention is to provide a solid-state image sensor and a light-receiving surface side of the solid-state image sensor having an opening, An element base having a first connecting portion fixed to the light emitting surface side, having a second connecting portion and having a mounting stud raised, and mounting the solid-state imaging device and opening the light receiving surface side thereof. Then, an element holder having a through hole having a diameter larger than that of the stud so as to pass through the mounting stud and having a connecting portion to be connected to the second connecting portion, and the solid-state imaging on the element holder. A solid-state image sensor assembly comprising an elastic member fixed to the mounting stud so as to elastically press the element and displace the element holder with respect to the element base. Providing a fixed structure To,

A second aspect of the invention is based on the solid-state image sensor assembly constructed according to the first aspect of the invention, in which the element holder of the solid-state image sensor assembly is made to correspond to the fixing portion of the color separation prism and back focus is performed. After the adjustment, the first connecting portion and the fixing portion of the element base are fixed, the element holder is displaced with respect to the element base, and after the registration adjustment, the connecting portion of the element holder and the element base A method for fixing a solid-state imaging device, characterized in that the second connection portion is fixed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below by applying it to a three-plate color video camera. FIG. 1 is an exploded perspective view showing an embodiment of a solid-state image sensor fixing structure and a fixing method according to the present invention.

An embodiment shown in FIG. 1 will be explained by using, for example, a three-plate type video camera. A three-color separation prism 1 has a ceramic prism base 3 attached to both sides thereof.
It is attached to the frame of the device via a and 3b. Then, the imaging light of the subject incident on the imaging lens (taking lens) not shown is the three-color separation prism 1.
Is decomposed into three colors of red (R), green (G), and blue (B), and reaches the light receiving surface of the solid-state image sensor 5 from the light emitting surface side of the three color separating prism 1 through the trimming filter 2. Has become.

A metal coating (metalizing layer) 4 such as copper (Cu) or silver palladium (Ag-Pd) is deposited on the light emitting surface side of the prism bases 3a and 3b by a metalizing method. .

A metal plate-shaped element holder 7 having a solid-state image pickup element 5 is sequentially stacked on a metal plate-shaped element base 6, and the element base 6 is screwed with a screw 9 via a leaf spring 8. By doing so, the respective intermediate members are elastically pressure-bonded and fixed to each other. The element base 6 and the element holder 7 are both solderable metals.

Specifically, the element base 6 having an opening 6a corresponding to the light receiving surface of the solid-state image pickup element 5 has a bent piece 6b connected to the metal coating 4 of the prism bases 3a and 3b at the central portions on both sides. 6b is provided, and 4 is provided at the upper and lower ends.
The individual connecting pieces 6c, 6c and the mounting studs 6d, 6d are projected.

On the other hand, the element holder 7 is provided with openings 7a corresponding to the light receiving surface and through holes 7b, 7b having a diameter sufficiently larger than the diameter of the studs so as to pass through the studs 6d, 6d, and the elements are provided on both sides thereof. Connecting piece 6 of base 6
c, 6c and corresponding upright tongues 7d, 7d projecting the connection pieces 7c, 7c and surrounding the solid-state image sensor 5.
Have.

Here, at the time of mounting, the studs 6d, 6d of the element base 6 are inserted into the through holes 7 of the element holder 7 having a sufficiently large diameter.
b, 7b are inserted, and the solid-state image sensor 5 is screwed to the studs 6d, 6d with the screws 9, 9 via the leaf spring 8 to temporarily assemble the solid-state image sensor assembly 10. By this temporary assembly, the element holder 7 having the solid-state image pickup element 5 with respect to the element base 6 is elastically allowed to move back and forth (in the optical axis direction) based on the studs 6d and 6d, and has a sufficiently large diameter. The insertion holes 7b, 7b allow vertical and horizontal movement.

Then, with the solid-state image pickup device assembly 10 arranged in a predetermined relationship with the trimming filter 2 by a jig (not shown), front and rear back focus, up and down, left and right with respect to the optical axis of the prism. After adjusting the tilt, the bent pieces 6b, 6b of the element base 6 and the prism base 3a,
The metal coating 3b of 3b is fixed by soldering. Then, the elastic force of the leaf spring 8 moves or pivotally displaces the element holder 7, which holds the solid-state image sensor 5 by pressure, against the pressure force of the element base 6 and the three colors (R). , G, B)
After adjusting the registration of the
Connection pieces 6c, 6c and connection pieces 7c, 7c of the element holder 7
By fixing and with solder, three-color separation prism 1
The solid-state image pickup device 5 on which the back focus adjustment and the registration adjustment have been accurately performed is fixed to the image pickup light emitting surface. By using the solid-state image sensor assembly in this way, each of the above adjustments can be performed separately in two parts. Therefore, once the back focus is adjusted, the previous adjustment is performed in the subsequent work (registration adjustment). It does not go crazy and various adjustments can be carried out very accurately, resulting in an increased reliability of the device.

[0016]

As described above in detail, according to the solid-state image pickup device fixing structure and the fixing method according to the present invention, the element holder for holding the solid-state image pickup device is relatively displaceable along the element base. Further, by using the solid-state image pickup device assembly that is elastically pressure-contacted, the back focus adjustment and the registration adjustment for the prism can be divided into two and can be individually performed. Other adjustments performed in the process do not cause the previous adjustment position to be out of alignment, and have the advantage of improving the reliability of the device such as the ease of assembly and the improvement of assembly accuracy.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a solid-state image sensor fixing structure and a fixing method according to the present invention.

[Explanation of symbols]

1 ... Color separation prism, 2 ... Trimming filter, 3a,
3b ... Prism base, 5 ... Solid-state image sensor, 6 ... Element base, 7 ... Element holder, 8 ... Leaf spring, 10 ... Solid-state image sensor assembly.

Claims (2)

[Claims] 1. A solid-state image pickup device, a first connection part having an opening on a light-receiving surface side of the solid-state image pickup device and fixed to a light emission surface side of a color separation prism, and a second connection part. With the element base in which the mounting stud is raised, the solid-state image sensor is mounted and the light receiving surface side thereof is opened, and the mounting stud has a through hole larger than the stud so that the mounting stud is inserted. An element holder having a connecting portion connected to a second connecting portion, and the element holder elastically pressing the solid-state imaging device on the element holder so that the element holder can be displaced with respect to the element base. A solid-state image sensor fixing structure comprising an elastic member fixed to a mounting stud and a solid-state image sensor assembly. 2. A solid-state image pickup device, a first connection part having an opening on a light-receiving surface side of the solid-state image pickup device and fixed to a light emission surface side of a color separation prism, and a second connection part. With the element base in which the mounting stud is raised, the solid-state image sensor is mounted and the light receiving surface side thereof is opened, and the mounting stud has a through hole larger than the stud so that the mounting stud is inserted. An element holder having a connecting portion connected to a second connecting portion, and the element holder elastically pressing the solid-state imaging device on the element holder so that the element holder can be displaced with respect to the element base. An elastic member fixed to the mounting stud and a solid-state image pickup device assembly are provided, and the element holder of the solid-state image pickup device assembly is made to correspond to the fixing portion of the color separation prism, and the element focus is adjusted after the back focus is adjusted. Fixing the first connection portion and the fixing portion of the element holder, and displacing the element holder with respect to the element base to adjust the registration, and then the connection portion of the element holder and the second connection of the element base. A method for fixing a solid-state image sensor, comprising: