JPS613572A - Image pickup device - Google Patents

Abstract

PURPOSE:To obtain an image pickup device surely fixing a solid-state image pickup element body while the solid-state image pickup element body is adjusted for movement simply by fitting the solid-state image pickup element body to a fixed frame clipping elastically and fitting a member of an image pickup optical system side. CONSTITUTION:A groove 12 for preventing flair is formed to a peripheral side wall of the end part of the emitting side of a prism 5 and a fixed frame 14 is iftted between the groove 12 and an external edge 13. The fixed frame 14 is a folded elastic plate member in a channel shape and the external end 13 of the prism 5 is clipped elastically. In mounting the solid-state image pickup element body 11 to the fixed frame 14, it is tightened by clipping the spacer 29. Thus, in case of the focus adjustment and the alignment adjustment of each picture element, a screw 19 of a clipping piece 15 is retrogressed in the X direction and the fixed frame 14 is slided minutely as to the Y direction. Further, the Z direction is adjusted by replacing properly the spacers 29 with diferent thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an imaging device that captures an image using a solid-state imaging device.

[Technical background of the invention and its problems]

Solid-state image sensors (CC) are used in imaging devices such as TV cameras.
When using D), alignment of the solid-state image sensor with respect to the optical system is important. In particular, in a two-panel type or three-panel type imaging device, it is necessary to accurately align the pixels of each solid-state image pickup element with each other and in the three-dimensional directions of XYZ.

However, in the past, the method was to simply overlap a tremor filter etc. via a spacer and fix them with adhesive, which made it difficult to make fine adjustments during assembly and could not be held securely.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and aims to provide a relatively simple structure, easy to finely adjust the movement of a solid-state image sensor body, and furthermore, to provide a method for fixing the solid-state image sensor body. The objective is to provide a reliable imaging device.

[Summary of the invention]

The present invention achieves this by attaching a solid-state image sensor body to a fixed frame that elastically sandwiches and attaches a member on the imaging optical system side.
An imaging device that allows easy adjustment of the movement of solid-state elements.
be.

[Embodiments of the invention]

Hereinafter, each embodiment of the present invention will be described based on the drawings.

1 to 3 show a first embodiment. Figure 1 is 3
The main part configuration of a plate-type COD color TV camera is shown. In the figure, 1 is an imaging lens of an imaging optical system, and 2 is a dichroic prism. This dichroic prism 2 is
1st. Second. The third consists of three prisms 3, 4.5. The first prism 3 has a dichroic surface Da and a reflective mirror surface MB, and separates blue light from the light incident through the imaging lens 1 and outputs it from the output end surface 6. The second prism 4 has a dichroic surface OR and a reflective mirror surface MR, and transmits the green light, separates the red light, and emits it from the output end surface 7. The third prism 5 transmits the green light as it is and outputs it from its output end face 8. Furthermore, solid-state II image element bodies 9, 10.11 are positioned and placed opposite to each other on each output end face 6.7.8.

Each of the solid-state image sensor bodies 9.10.11 is attached to a member on the imaging optical system side, for example, each prism 3.4.5, by means as shown in FIG.
Ru. Although FIG. 3 shows the case where the solid-state Il image element body 11 is attached to the third prism 5, other components can be attached in the same manner.

That is, on the circumferential side wall of the output side end of the prism 5, a bulge 12 for preventing flare is formed over the entire circumference.

Further, an outer end portion 13 on the output side partitioned from the full 12
A fixed frame 14 is attached to the. This fixed frame 14 is made by bending an elastic plate-like material into a trowel shape, and each end of the fixed frame 14 is attached to a clamping piece 1.
5.15, whereby the outer end 13 of the prism 5
be held elastically. Further, each clamping piece 15.15 is formed with protrusions 16, 16 which are formed along the width direction thereof and protrude inwardly. And this protrusion 16
, 16 press against the side wall surface of the outer end 13, and the outer end 1
It is designed to hold 3. A bent piece 17, 17 that is bent inward is formed at the tip of each clamping piece 15, 15, and each bent piece 17, 17 is fitted into the above-mentioned hole 12. Furthermore, screw holes 18, 18 are bored in each of the clamping pieces 15, 15, avoiding the protrusions 16, 16. Then, a screw 19 is inserted into each screw hole 18.18.
．． 19 screws are inserted.

On the other hand, a window 21 is formed in the central plate portion 2o of the fixed frame 14, and screw holes 22.22 are bored in the left and right side portions of the window 21.
A relatively long screw 23°23 is inserted into the hole. The screws 23 and 23 are used to fasten and identify the solid image body 11 which is superimposed and joined to the central plate portion 2o. Moreover, 24.24 is a washer used at that time.

The solid-state image sensor body 11 has an element section 26 provided in the center of a package 25, and lead pieces 27 are provided protruding from the upper and lower ends of the package 25, respectively. Furthermore, notches 2, 8, and 28 are formed at the left and right ends of the package 25, respectively. And the above screw 2
3.23 passes through the notch 28.28 and package 2
5 is tightened to attach the solid-state image sensor 11 to the fixed frame 14.

Further, when this solid-state image sensor body 11 is attached to the center plate portion 20 of the fixed frame 14, a spacer 29 for focus adjustment is interposed between the two. This spacer 29 is made of a relatively thin plate-like member, and has a window 30 formed in its center. Furthermore, the notches 2 are provided at the left and right ends of the spacer 29.
A notch 31.31 is formed corresponding to 8.28. □This spacer 29 is available in many types with different thicknesses.

Next, when attaching the solid-state image sensor body 11, the solid-state image sensor body 11 is first joined to the central plate portion 20 of the fixed frame 14 with the spacer 29 in between, and the notches 2 are
8. Insert the screws 23.23 through 28, 31.31, and tighten and fix by screwing them into the screw holes 22, 22.

Further, the outer end portion 13 of the prism 5 is sandwiched between the clamping pieces 15, 15 of the fixed frame 14, and the fixed frame 14 is attached to the prism 5 as shown in FIG. The protrusions 16, 16 of this sharpening clamping piece 15.15 press against the outer surface of the outer end 13 of the prism 5, and the bent pieces 17.17 are inserted into the groove 12 for preventing flare.

Next, the imaging optical system is adjusted to focus the solid-state image sensor body 11 and to make each pixel correspond to each other. first,
For the X direction, the screw holes 18 and 18 of the clamping pieces 15, 15
Screw 19 screwed into
．． By pressing the tip of 19 against the side surface of the outer end 13, it moves in the X direction and selects a position in the X direction. Regarding the YZ direction, use a jig or the like (not shown) to move the fixed frame 14 slightly.
Adjust by sliding. In addition, adjustment can also be made by appropriately exchanging spacers 29 having different thicknesses, especially in two directions. Regarding the Y direction, for example, as shown by the dotted line in FIG. This may also be done by inserting screws 34, 34 into the angle 33, and moving the screws 34, 34 abutting against the upper and lower side surfaces of the outer end 13 and moving them back and forth. In this way, adjustment in the XYh direction can be done using screws 19.19.34.3.
4, but it may also be done only in the Y direction.

In this way, the positioning of the solid-state image sensor body 11 is completed, but in addition, the inside of the filler 12 for preventing flare is filled with adhesive along with the bent pieces 17 and 17 of the fixed frame 14, and the fixed frame 15 is more securely fixed. It's okay. Furthermore, the holding piece 15.15, particularly the protrusion 16.16 portion, may be adhered to the side wall surface of the outer end portion 13 of the prism 5. In addition, fixing frame 1 using screws.
4 may be fixed to the prism 5.

The other solid-state one-image element bodies 9 and 10 are also attached in the same manner as described above. In this way, the solid-state image sensor body 9.1
You can easily adjust the XYZ movement of 0.11, and
Fixation to the prisms 3, 4.5 is reliable.

Note that the spacer is not limited to the one in the above embodiment, but may be one as shown in each figure in FIG. 4. Figure 7 (
A> has a pair of strip-shaped spacers on the left and right 1 spacer 3
4.34 is arranged. The method shown in FIG. 4(B) is a method in which small spacers 35 are arranged at the four corners. The one shown in FIG. 4(C) is a method in which strip-shaped spacers 36 and 36 are arranged on the upper and lower sides, respectively. FIG. 4(D) shows a spacer 37 formed from a transparent plate-like material. Adjustment in the Z direction is performed by preparing a large number of these having different thicknesses and using them interchangeably. Also,
In the methods shown in FIGS. 4(B) and 4(C), the inclination can also be adjusted at the same time. Moreover, if the groove 12 for preventing flare is formed not in a simple mouth shape but in a wedge shape as shown in FIG. 5, engagement with the bent pieces 15 and 15 can be ensured. In addition, the solid-state image sensor body does not have to directly hold the package.
The solid-state image sensor body may be attached to a substrate serving as another support.

〔Effect of the invention〕

As described above, according to the present invention, although the configuration is relatively simple, fine adjustment of the movement of the solid-state image sensor body relative to the imaging optical system can be easily and reliably performed.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of the main parts of a three-element COD camera showing an embodiment of the present invention, Fig. 2 is a perspective view of the dichroic prism, and Fig. 3 is a diagram of the solid-state image sensor body for the dichroic prism. Installation is shown in perspective view of section 4.
Figures (A) to (D) are arrangement front views showing modified examples of the spacer, respectively, and Fig. 5 is a plan view showing a modified example of the groove for preventing flare. 3...first prism, 4...second prism, 5
...Third prism, 9,10. ．． 11...solid m
S element body, 12...Flare prevention groove, 14...Fixing frame, 15...Holding piece, 17...Bending piece, 29...
·Spacer. Applicant's representative Patent attorney Jun Tsuboi Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] An imaging device that receives and images an optical image obtained through an imaging optical system with a solid-state imaging device, which has at least a pair of clamping pieces and is attached to the imaging optical system by elastically sandwiching a member on the imaging optical system side. An imaging device comprising a fixed frame and a solid-state image sensor body attached to the fixed frame.