JPH0879594A - Adjusting device for position of solid-state image pickup element - Google Patents

Abstract

PURPOSE: To easily and surely adjust the position or solid-state image pickup elements by moving the spectral prism, where plural solid-state image pickup elements are arranged in a light emission part attached to a moving guide body, in the direction of the optical axis. CONSTITUTION: A cover 5 of the front frame side face is opened to expose the outer peripheral serrations of an annular adjustment member 6. When an operator rotates the serrated part by hand while using a camera and a monitor to confirm the picture, a moving guide body 10 brought into contact with the rear end part of the member 6 through a friction reduction member 7 and a spectral prism accessory 20 are moved in the direction of the optical axis by feed of an inner ring part screw of the member 6, and solid-state image pickup elements are easily adjusted to a prescribed flange back. After adjustment, the outer peripheral serration of the member 6 and a short-diameter steel ball 15 of the front frame are elastically engaged with each other to prevent the member 6 from rotating, and the adjusted state is kept. Then, the cover 5 is closed to cover the member 6, thus preventing the trouble after adjustment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position adjusting device for a solid-state image sensor in a television camera using the solid-state image sensor.

[0002]

2. Description of the Related Art As a lens used in a television camera (hereinafter, simply referred to as a camera), there is a lens having a U1 screw as a mounting mechanism, that is, a so-called C-mount type lens, and a camera housing of this lens. The distance from the mounting reference surface to the image forming surface of the optical image (hereinafter, referred to as flange back) is defined by the standard. However, since the flange back of each lens causes a manufacturing error, in order to obtain a good image, the image pickup surface of the solid-state image pickup device and the image forming surface of the lens must be exactly aligned. Even in conventional cameras, the relative position of the lens and the solid-state image sensor is adjusted, such as moving the solid-state image sensor in the optical axis direction or moving the lens mounting reference plane in the camera in the optical axis direction. Some have the function to do.

[0003]

Each of the above-mentioned conventional position adjusting techniques requires a special tool such as a screwdriver,
Fine adjustment is difficult. Alternatively, there is a drawback that adjustment and two fixing operations for holding the adjusted state are required. In addition, in a multi-plate camera, optical components such as a spectroscopic prism must be arranged on a short flange back, and the position adjusting device for a solid-state image sensor in the prior art is arranged on the peripheral side of the spectroscopic prism. Therefore, the structure becomes large,
As a result, there is concern that the camera housing will also become larger.
An object of the present invention is to provide a position adjusting device for a solid-state image pickup device, which eliminates these drawbacks and can adjust the flange back easily and reliably.

[0004]

In order to achieve the above object, the present invention has an annular adjustment in which a housing of a television camera has a threaded portion in one of a pair and a threaded portion in an inner ring portion. A fixed guide body composed of a guide member that supports the member by screwing the screw portion and the other is provided with a guide member for providing a rotation suppressing function, has a pair of holes, and is parallel to this. A pair of hole portions of a moving guide body having a spectral prism screw-coupled to the side surfaces and the outer circumferences of the pair of guide members are fitted to each other, and one surface orthogonal to the hole portion of the moving guide body has one end of the annular adjusting member. And the other surface is pressed by the elastic member.

[0005]

According to the above-described structure, the spectroscopic prism having the plurality of solid-state image pickup devices arranged in the light emitting portion attached to the moving guide by the rotation axis of the annular adjusting member moves back and forth in the optical axis direction. Therefore, the position of the solid-state image sensor with respect to the lens mounting reference plane in the camera housing can be adjusted easily and reliably.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the position adjusting device for a solid-state image pickup device of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention and the configuration of the main part thereof. A light alloy die-cast front frame 1 has a large-diameter hole, a recess, and a plurality of screw holes for fitting and mounting a lens mount 2 described later on the front surface. Although not shown in the drawing, a screw portion for attaching a pair of guide members 8 and 9 described later is provided on the rear surface, and further, for example, on the right side surface, an outer peripheral knurl portion of the adjustment member 6 described later is provided. A window is provided so that a part of the window is exposed. still,
The front frame 1 is appropriately combined with a plate plate, an upper chassis, and a lower chassis (all not shown) to form a camera housing. Reference numeral 6 is an annular adjusting member, and knurls are engraved on the entire outer circumference thereof. The groove width of the knurl is selected to be slightly smaller than the diameter of a small diameter rope 15 described later. The inner ring portion of the ring-shaped adjusting member 6 is threaded. Reference numerals 8 and 9 denote a pair of guide members, and one guide member 8 is provided with a screw portion 8a.
After being screwed into the screw of the inner ring portion of the annular adjusting member 6, it is attached to the rear surface of the front frame 1 using the screws 8b and 9b as with the other guide member 9.

Therefore, the annular adjustment member 6 is loosely fitted between the rear surface of the front frame 1 and the guide member 8 by screwing the screw portion. Further, at this time, a part of the outer peripheral knurl of the annular adjustment member 6 is part of the front frame 1 described above.
It is exposed from the window on one side. Reference numeral 20 is a spectral prism accessory, for example, in the case of a three-plate camera, R, G, B
The solid-state image sensor is positioned and fixed to the light emitting portion of the.
Further, for example, a ceramic molded pedestal is adhered to the right side surface, and a screw portion for fixing and a guide hole are provided on this pedestal. Reference numeral 10 denotes a movement guide body, which is provided with a pair of holes that fit with the guide member 8 and the guide member 9. Of these holes, one hole 10a is a reference hole for movement, and is fitted with the outer periphery of the guide member 8 with a gap of several μm, and thus is precisely machined. The other hole 10b is fitted to the outer periphery of the guide member 9 and serves as a mechanism for suppressing the rotation direction.

Further, two guide pins 10d for positioning the spectroscopic prism accessory 20 are erected on one surface 10c orthogonal to the pair of holes, and the spectroscopic prism accessory 20 is attached to the moving guide body 10 by a screw 31. Fixed after positioning. Thereafter, the movement guide body 10 is inserted into the pair of guide members 8 and 9 via the friction reducing member 7 until it comes into contact with the rear end portion of the annular adjustment member 6. Reference numeral 11 is a compression coil spring, which is a moving guide body 10 and a pair of guide members 8 and 9.
It is fitted into the holding plate 12 attached to the rear end of the guide member 8 with the screw 32, and is arranged on the circumferential side of the guide member 8. As a result, the movement guide body 10 is always urged to the front side (lens side) by the pressing force of the compression coil spring 11,
The play in the front-rear direction of the movement guide body 10 and the play due to the backlash between the annular adjustment member 6 and the guide member 8 are removed. The deformable leaf spring 13 includes the guide member 9 and the movement guide body 1.
The guide member 9 and the moving guide body 10 are fitted in the guide member 9 and the moving guide body 10 in such a manner that the guide member 9 and the movement guide body 10 are fitted therein.

Reference numeral 2 denotes a lens mount, a screw for mounting a lens is cut on the front surface, and an optical color filter 2a is adhered to the rear thereof. 3 is a packing having a window portion and a convex portion having a highly elastic shape on the peripheral side of the window portion.
It is attached to the rear end of the front frame 1 by adhesion or elastic fitting, and together with the lens mount 2, screws 3 are attached to the front surface of the front frame 1.
It is fixed by 3. At this time, the highly elastic convex portion of the packing contacts the front surface portion of the prism accessory 20. Further, since the rear cylindrical portion of the lens mount 2 is inserted into the large diameter hole on the front surface of the front frame 1 in a fitted state, the optical axis accuracy is good. Reference numeral 15 is a small diameter rope, which is not shown in the drawing but is biased by the compression coil spring 16 so as to come into contact with the outer peripheral knurl of the annular adjusting member 6 and is attached to the front frame 1 by the set screw 17. .
Reference numeral 5 is a high-elasticity plastic cover, a hinge portion 5a of which is partially formed, and one end of which is attached to one side surface of the front frame 1 in the vicinity of the window portion with screws 34. Further, since two claw portions are provided at the other end and hooked to the window end portion of the front frame 1, it can be easily opened and closed by hand.

The procedure of position adjustment of this embodiment will be described below. The cover 5 arranged on one side of the front frame 1
When is opened, the outer peripheral knurl of the annular adjusting member 6 is partially exposed. Using the camera and monitor, while rotating the exposed annular adjustment ring by hand while checking the monitor image, the screw of the inner annular portion of the annular adjustment ring 6 is fed,
The movement guide body 10 and the spectral prism accessory 20 that are in contact with the rear end portion of the annular adjustment ring 6 via the friction reducing member 7.
Moves smoothly in the optical axis direction, and as a result, the solid-state imaging device is easily adjusted to a predetermined flange back. After the adjustment, the outer peripheral knurl of the annular adjusting member 6 and the small diameter rope 15 of the front hood 1 elastically engage with each other to prevent the annular adjusting member 6 from rotating, and the adjusted state is reliably maintained. After that, by closing the cover 5, the annular adjustment member 6 is not touched unless the adjustment operation is intentionally performed, so that a trouble or the like after the adjustment due to a human error can be prevented.

[0011]

As described above, according to the present invention, the following effects can be obtained. 1. It can be adjusted manually without the need for special tools. 2. Fine adjustment is easy. 3. The adjusted state can be maintained reliably. 4. The mounting space inside the camera housing can be reduced. (Valid for multi-panel cameras)

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Front Frame 2 Lens Mount 3 Packing 5 Cover 6 Annular Adjustment Member 7 Friction Reducing Member 8, 9 Guide Member 10 Moving Guide Body 11, 16 Compression Coil Spring 12 Holding Plate 13 Deformable Leaf Spring 15 Small Diameter Rope Ball 17 Set Screw 20 Prism Accessory 31 , 32, 33 screws

Claims (2)

[Claims] 1. A television camera housing, wherein one of a pair has a threaded portion, and an annular adjustment member having a threaded portion provided in an inner ring portion so as to be screwed with the threaded portion. A fixed guide body composed of a guide member supported by screwing the two parts and a guide member for providing a rotation suppressing function on the other side, and having a pair of hole parts fitted into the fixed guide body. The hole portion of the moving guide body in which a spectral prism having a plurality of solid-state image pickup devices positioned and attached to the light emitting portion is screw-coupled to one side surface parallel to the hole portion, and the outer circumference of each of the pair of guide members serving as the fixed guide body. It is fitted so that one surface of the movement guide body, which is orthogonal to the hole portion, comes into contact with one end of the annular adjustment member and the other surface is pressed by an elastic member, and the movement is caused by rotation of the annular member. The spectroscopic pref screwed to the guide body A position adjusting device for a solid-state image pickup device, wherein the lens moves in the optical axis direction. 2. The position adjusting device for a solid-state image pickup device according to claim 1, wherein a click mechanism including a hard ball and an elastic member is added to the annular adjusting member portion. .