JPH06133322A - Mount method for solid-state color image pickup device - Google Patents

Abstract

PURPOSE:To provide the mount method of the solid-state image pickup device in which highly accurate assembly and mass-production are facilitated at a low cost with miniaturization by simplifying the mount structure of the solid- state color image pickup device onto a lens barrel CONSTITUTION:A liquid ultraviolet ray curing adhesives is interposed among prism members 3a, 3b, 3c and among the prism members 3a, 3b, 3c and among solid-state image pickup elements 4a, 4b, 4c of a solid-state color image pickup device and they are tentatively assembled and a liquid ultraviolet ray curing adhesives is applied between the solid-state image pickup device assembled tentatively and a mount base 1 and they are tentatively assembled. A reference chart 8 is picked up by the solid-state image pickup elements 4a, 4b, 4c via a lens barrel 5 incorporating a camera lens to detect the position, and after the optical length of the solid-state image pickup elements 4a, 4b, 4c and the longitudinal axis and the lateral axis are positioned relatively to fix the entire components in the lump by emitting an ultraviolet ray to the adhesives.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a solid-state color image pickup device used in a television camera, a video camera or the like having a solid-state image pickup element.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for improvements in downsizing and high image quality of video cameras. From this fact, it is expected that the three-plate type solid-state color image pickup device which has been conventionally used for commercial use will be developed for a consumer high image quality video camera.

A method of mounting a conventional solid-state color image pickup device will be described below. FIG. 3 shows a plan view (FIG. 3A) and a front view (FIG. 3B) of a conventional method of mounting a solid-state color imaging device. In FIG. 3, reference numeral 1 is a mounting base for mounting the solid-state color imaging device on a fixing member, and 3
a, 3b, 3c are prism members forming a color separation prism, 4a, 4b, 4c are solid-state image pickup devices for picking up respective color components, 5 is a lens barrel having a built-in camera lens for forming an image of an object on the solid-state image pickup device, Reference numeral 8 is a reference chart which is an imaged object, and 9
Is a fixing member for mounting the mounting base, 10 is a screw for fixing, and 11 is a flange for mounting the lens barrel.

The operation of the mounting method of the solid-state color image pickup device configured as described above will be described below. First, in a solid-state color imaging device including a color separation prism composed of the prism members 3a, 3b and 3c and solid-state imaging devices 4a, 4b and 4c, the prism members 3a, 3b, 3c and After the solid-state imaging devices 4a, 4b, and 4c are relatively positioned and fixed, a room-temperature curing adhesive is applied to the mounting base 1 and solid-state imaging is performed on the end faces of the prism members 3a, 3b, and 3c from the incident surface. The mounting base 1 is fixed in parallel by a jig or the like so as not to tilt with respect to the optical axes of the elements 4a, 4b, 4c.

The mounting base 1 is placed on the fixing member 9 temporarily fastened to the flange 11 with the screw 10a, and the screw 10b is temporarily fastened. The mounting holes for the screws 10a and 10b are provided so that the positions of the solid-state color image pickup device can be adjusted.
The gap with 0b is slightly larger.

The reference chart 8 is imaged by the solid-state image pickup device 4c through the lens barrel 5 having a built-in camera lens, and is slid between the flange 11 and the fixing member 9 while observing the image pickup signal, so as to be positioned vertically. Match and fix with screws 10b. Similarly, the optical path length is aligned with the mounting base 1 and the fixing member 9 in the lateral direction, and the optical path length is fixed with the screw 10a.

[0007]

However, in the above-mentioned conventional structure, since each dedicated mounting base, fixing member and flange are required and the number of parts is large, the size is large and the cost is high and the assembling process is complicated. Therefore, there is a problem that mass production is difficult.

The present invention solves the above-mentioned conventional problems, and provides a mounting method of a solid-state color image pickup device which simplifies the structure, enables compact and low-cost assembly with high precision, and facilitates mass production. It is provided.

[0009]

In order to achieve this object, a method of mounting a solid-state color image pickup device of the present invention is a solid-state color image sensor comprising a color separation prism composed of prism members and a solid-state image pickup device for picking up color components. -In the method of mounting an image pickup device on a lens barrel, a mount for mounting a solid-state color image pickup device is integrated with the lens barrel. Alternatively, the mounting base is configured to be attachable to and detachable from the lens barrel by means of positioning pins provided on the mounting base, and fine ruggedness is provided on the bonding surface of the mounting base with the solid-state color imaging device.

Further, there is provided a structure in which a fixing plate having a transparent appearance and having fine irregularities on the adhesive surface is provided at a position facing the mounting base.

[0011]

With this structure, a liquid adhesive is sandwiched between the prism members of the solid color image pickup device and between the prism member and the solid state image pickup device to temporarily assemble them, and between the temporarily assembled solid color image pickup device and the mounting base. The liquid adhesive is sandwiched and temporarily assembled. Then, the reference chart is imaged by the solid-state image sensor through the camera lens and the position is detected as an image signal. After aligning the optical path length and the vertical and horizontal directions while observing the imaging signal, ultraviolet light is radiated, and then each prism member and each solid-state imager and between the lens barrel and the solid-state color imaging device are irradiated. Fix all at once.

As described above, by integrally mounting the mounting base with the lens barrel and assembling the solid-state color imaging device and mounting the solid-state color imaging device on the mounting base with high accuracy, the structure can be simplified and downsized. In addition, in a configuration in which the mounting base is provided with positioning pins and can be attached to and detached from the lens barrel, the mounting base is attached to the assembly device equipped with the lens barrel of the reference lens, and the solid-state color image pickup device is assembled and fixed to the mounting base. After removal, the positioning pin enables highly accurate assembly into the lens barrel for the camera, facilitating mass production.

Further, the bonding strength is improved by providing fine unevenness on the bonding surface of the mounting base and the fixing plate and the solid color image pickup device, and by mounting the fixing plate on the surface facing the mounting base of the prism member, the solid color Since the image pickup device can be held on both sides instead of being held by the mounting base, changes over time after mounting can be reduced, and by providing fine irregularities on the adhesive surface of the fixing plate, the adhesive strength is the same as in the mounting of solid color image pickup devices. Is improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which a solid-state color image pickup device is attached to a lens barrel. 1 is a mount integrally formed with the lens barrel by resin molding or the like, 2 is a fixing plate for connecting the lens barrel and the prism member, 3a, 3b and 3c are colors for separating imaged light into blue, green and red The prism members 4a, 4b, and 4c constituting the disassembling prism are solid-state image pickup devices for picking up blue, green, and red color components, 5 is a lens barrel having an image pickup lens for coupling an image pickup object to the solid-state image pickup device, and 7 is A groove for preventing the adhesive from squeezing out, and a reference chart 8 as an imaged object.

The operation of the mounting method of the solid-state color image pickup device constructed as described above will be described. Between the prism members 3a, 3b and 3c of the solid-state image pickup device, the prism members 3a, 3b and 3c and the solid-state image pickup devices 4a and 4b,
Liquid ultraviolet light curable adhesive is sandwiched between 4c and temporarily assembled,
A liquid ultraviolet light curable adhesive is sandwiched between the temporarily assembled solid-state color image pickup device and the mounting base 1 for temporary assembly.

The reference chart 8 is imaged on the image pickup surfaces of the solid-state image pickup devices 4a, 4b, 4c through the lens barrel 5 having a camera lens, and the position is detected by the image pickup signal. The mount 1 and the prism members 3a, 3b, 3 while observing the image pickup signal
The solid-state imaging device 4a is made to slide closely between c so that the optical path length is matched. When the mounting base 1 slides, the adhesive does not flow out of the bonding surface and flow into the incident surface of the prism member 3a.
A groove 7 is provided in the mounting base 1.

Similarly, while observing the image pickup signal, the optical path lengths of the solid-state image pickup devices 4b and 4c are adjusted to the prism members 3a and 3a.
It is performed by the close contact between b and 3c. Further, the alignment of the solid-state imaging devices 4a, 4b, 4c in the vertical and horizontal directions excluding the optical path lengths is performed by the solid-state imaging devices 4a, 4b, 4c and the prism member 3.
a, 3b, 3c, and the like, and then ultraviolet light is radiated to collectively cover the prism members 3a, 3b, 3c, the solid-state image sensors 4a, 4b, 4c, and the mount 1. Fix it. After this, a transparent fixing plate 2 is attached to the surface of the mounting base 1 of the solid-state color image pickup device facing the bonding surface and the end surface of the lens barrel by sandwiching a liquid ultraviolet curing adhesive and irradiating ultraviolet light. To fix.

As described above, according to this embodiment, when the solid-state color image pickup device is mounted on the mount integrated with the lens barrel, the optical path length is 10 μm or less corresponding to each lens barrel having a built-in camera lens. The positions of the vertical and horizontal axes could be adjusted to 1 μm or less. In addition, there is no influence on the positional accuracy when the fixing plate is attached, and the adhesive strength is improved by providing the matte surface-like unevenness.

A second embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, 1 is a mounting base for mounting the solid-state color imaging device, 2 is a fixing plate for connecting the mounting base and the solid-state color imaging device, 3 is a prism member, 4 is a solid-state imaging device, and the above is the same as the configuration of FIG. It is something.
The difference from the configuration of FIG. 1 is that the mounting base 1 has a positioning pin 6, a mounting hole 12 for mounting the lens barrel, and a hole 13 through which a light beam passes.
That is the point.

The operation of the mounting method of the solid-state color image pickup device constructed as described above will be described below. First, the mount 1 is attached to the assembling apparatus equipped with the lens barrel of the reference lens, the positioning pins 6 are aligned with the reference lens, and the mounting holes 12 are attached to the assembling apparatus, and the prism members 3a, 3b and 3c and the solid-state image pickup device are attached. After assembling the solid-state color imaging device 4a, 4b, 4c and fixing it to the mounting base 1, after removal, the positioning pin 6 is inserted into a pin hole of a lens barrel for a camera and fixed with a screw 10c.

As described above, mass production was easy by making the mounting table removable.

[0023]

As described above, according to the present invention, the mounting base is integrated with the lens barrel or is attachable / detachable by the positioning pin provided on the mounting base, and the solid color image pickup device assembly and the lens barrel and the solid color image pickup device are provided. By collectively mounting with high accuracy, the structure can be simplified, the size can be reduced, and mass production is easy. Also, by holding both sides of the solid-state color image pickup device with the fixing plates, it is possible to reduce the change with time after attachment.

[Brief description of drawings]

FIG. 1A is a plan view showing a solid-state color imaging device using a first embodiment of the present invention, and FIG. 1B is a front view of the imaging device.

FIG. 2A is a side view showing the configuration of a mounting base used in a second embodiment of the present invention, and FIG. 2B is a front view thereof.

FIG. 3A is a plan view showing a mounting structure of a conventional solid-state color imaging device, and FIG. 3B is a front view thereof.

[Explanation of symbols]

 1 Mounting Base 2 Fixing Plate 3 Prism Member 4 Solid-State Image Sensor 5 Lens Bar 6 Pin 7 Groove 8 Reference Chart 9 Fixing Member 10 Screw 11 Flange 12 Mounting Hole 13 Hole

Claims (4)

[Claims] 1. A method for mounting a solid-state color image pickup device comprising a color separation prism made of a prism member and a solid-state image pickup device for picking up color components on a lens barrel, wherein a mounting base for mounting the solid-state color image pickup device is provided. A method for mounting a solid-state color imaging device, characterized by being integrated with the lens barrel. 2. A method for mounting a solid color image pickup device comprising a color separation prism made of a prism member and a solid state image pickup device for picking up a color component on a lens barrel, wherein a mounting base for mounting the solid color image pickup device. A mounting method for a solid-state color imaging device, characterized in that a positioning pin is provided and the mount can be attached to and detached from the lens barrel. 3. The mounting method for a solid-state color image pickup device according to claim 1, wherein the attachment surface of the mounting base is provided with fine irregularities. 4. A mounting method for a solid-state color image pickup device according to claim 1, wherein a fixing plate having a transparent appearance and having fine irregularities on an adhesive surface is provided at a position facing the mounting base.