JP2000125162A - Lens mount for board camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust optical axes of respective lenses in a different diameter fitting part, to eliminate the need of holder exchange and to eliminate the need of work in a clean room by providing a circular recessed part engaged with a CCD holder disk at the back of a holder fitting part, thereby fitting a CCD holder. SOLUTION: An optical filter 3 which faces a solid-state image pickup element 2 fitted to a substrate 1 and through which required wavelength light passes is fixed in the center of a disk 4a, and a mount fitting part is provided in a peripheral edge part. A CCD holder 4 where a cylindrical substrate fitting part 4b fitted to the substrate 1 by surrounding the solid image pickup element 2 is formed on an inner edge back face and a circular recessed part 5a2 engaged with the disk of the CCD holder 4 at the back face of a holder fitting part 5a are provided. Then, a lens mount 5 having a cylindrical lens fixing part 5b to which a lens 6 that picks up an image on the solid-state image pickup element 2 is fitted at the center of a front face is also installed. Since the lens mount 5 corresponding to the lens is exchanged at the time of exchanging the lens, the difference of the diameter of a fitting part 6a is not a problem.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens mount for a board camera, and more particularly, to a lens mount for a lens having a different diameter.

[0002]

2. Description of the Related Art Conventionally, a solid-state imaging device is mounted on a substrate,
A lens for imaging on the solid-state imaging device, a lens mount for a board camera configured to be attached to the substrate via a lens mount having an optical filter that transmits only light of a required wavelength, for example, As shown in FIG. 4A, the optical filter 3 facing the solid-state imaging device 2 is fixed to the center of a cylindrical body (lens mount) 9;
One side is provided with a mounting portion 9a surrounding the solid-state imaging device 2 and attached to the substrate 1, and the other side is provided with a lens fixing portion 9b for mounting the lens 6. However, the diameter and focal length of the mounting portion of the lens to the lens mount differ depending on the manufacturer and model, and when the lens is changed depending on the board camera model and shipped, the lens mount must be replaced. In the conventional example shown in FIG. 4A, the entire lens mount must be replaced with a lens suitable for the lens, and the operation must be performed in a clean room. Had become. Therefore, in recent years, as shown in FIG. 4B, the optical filter 3 facing the solid-state imaging device 2 is fixed to a hole 4a1 at the center of the disk 4a, and a mounting hole 4a2 ′ is provided at a peripheral edge thereof. A tubular substrate mounting portion 4b surrounding the solid-state imaging device 2 and mounted to the substrate 1 on the inner back surface of the mounting hole 4a2 '.
And a lens mount 5 having a cylindrical lens fixing portion 5b for mounting the lens 6 at the center of the front surface of a mounting portion 5a 'having a screw hole 5a1' corresponding to the mounting hole 4a2 '. In the case where the lens 6 is changed and the lens 6 is changed and shipped, the mounting operation is performed in a clean room without changing the CCD holder 4 and only the lens mount 5 is changed. But,
In this configuration, as described above, when the lens is changed and shipped, there is an effect that it is not necessary to perform the mounting operation in a clean room, but there is a problem that the optical axis of the CCD holder and the lens mount are shifted. Was.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and eliminates the necessity of performing the mounting work in a clean room when the lens is changed and shipped. It is intended to provide a lens mount for a board camera.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an optical filter which passes only light of a required wavelength in the center of a disk opposite to a solid-state image sensor mounted on a substrate. A CCD holder that is fixed and provided with a mount mounting portion at a peripheral portion thereof, and a cylindrical substrate mounting portion that surrounds the solid-state imaging device and is mounted on the substrate on the back surface inside the mount mounting portion; A cylindrical lens fixing portion for providing a circular concave portion for fitting the disk of the CCD holder on the back surface of the holder mounting portion corresponding to the portion, and for mounting a lens for forming an image on the solid-state imaging device at the center of the front surface. And a lens mount for a board camera.

[0005] A board camera in which the mount mounting portion has a mounting screw hole on a peripheral edge thereof, and the holder mounting portion has an insertion hole through which a screw portion of a screw screwed into the mounting screw hole is inserted. Lens mount.

The mount mounting portion has a mounting hole on a peripheral edge thereof, while the holder mounting portion has a screw hole for screwing a screw inserted into the mounting hole. I have.

A lens mount for a board camera is provided in which an internal thread corresponding to a male thread formed on the outer periphery of the lens mounting portion is formed on the inner periphery of the lens fixing portion.

A lens mount for a board camera is provided in which a screw hole is provided in a lens fixing portion of the lens mount from an outer periphery to an inner periphery of the lens fixing portion.

[0009]

As described above, in a lens mount for a board camera according to the present invention, only light of a required wavelength passes through the center of a disk facing a solid-state imaging device mounted on a substrate. A CCD holder that fixes the optical filter, provides a mount mounting portion on the peripheral edge, and forms a cylindrical substrate mounting portion that surrounds the solid-state imaging device and mounts to the substrate on the back surface inside the mount mounting portion, The CCD on the back of the holder mounting part corresponding to the mount mounting part
Since a circular concave portion for fitting the disk of the holder is provided, and a lens mount having a cylindrical lens fixing portion for mounting a lens for forming an image on the solid-state imaging device is provided at the center of the front surface. By replacing the lens mount with a lens mount having a lens fixing part corresponding to the lens to be mounted, various lenses having different diameters of the mounting part can be mounted.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a lens mount for a board camera according to the present invention will be described in detail with reference to the drawings. 1 and 2 show an embodiment of a lens mount for a board camera according to the present invention. FIG. 1- (A) is a front view, FIG. 1- (B) is a side sectional view, and FIG. It is a perspective view. In the figure, 1
Is a substrate on which a solid-state imaging device is mounted, 2 is the same substrate 1
The solid-state imaging device mounted thereon. Reference numeral 3 denotes an optical filter that cuts light having an unnecessary wavelength and passes only light having a necessary wavelength. Reference numeral 4 denotes a CCD holder having a hole 4a1 at the center.
A disk 4a in which an optical filter 3 facing the solid-state imaging device 2 is fixed in the hole 4a1 and a mounting screw hole 4a2 forming a mounting mounting portion is formed on a peripheral edge;
The solid-state imaging device 2 is formed in a cylindrical shape on the back surface of the circular plate 4a on the inner circumference from a2 and surrounds the solid-state imaging device 2, and includes a substrate mounting portion 4b mounted on the substrate 1.

Reference numeral 5 denotes a lens mount. The lens mount 5 has an insertion hole 5a1 on a peripheral edge thereof which forms a holder mounting portion 5a corresponding to the mounting screw hole 4a2 of the mount mounting portion.
A circular concave portion 5a2 for fitting the disc 4a is provided on the back surface of the holder mounting portion 5a, and a cylindrical lens fixing portion 5b for mounting the lens 6 is provided at the center of the front surface. The lens fixing portion 5b is formed in a cylindrical shape, and a screw hole 5b1 cut from the outer periphery toward the inner periphery is formed around the cylindrical portion. 6
Denotes a lens for forming an image on the solid-state imaging device 2, and includes a mounting portion 6 a corresponding to a lens fixing portion 5 b of the lens mount 5. Reference numeral 7 denotes a screw inserted from the insertion hole 5a1 and screwed into the mounting screw hole 4a2. 8
Is a screw that is screwed into the screw hole 5b1 to fix the lens 6.

FIG. 3 is a sectional side view showing a main part of another embodiment of a lens mount for a board camera according to the present invention. As shown in the figure, a lens 6 is provided on the inner periphery of the lens fixing portion 5b.
A female screw 5b2 corresponding to the male screw 6a1 formed on the mounting portion 6a is formed. The inner diameter of the lens fixing portion 5b is designed according to the lens to be mounted, so that if the lens does not have a male screw, the screw is not cut.

Next, the assembling procedure of the above configuration will be described. First, in a clean room, a CCD holder 4 on which an optical filter 3 is fixed is mounted on a substrate 1 on which a solid-state solid-state imaging device 2 is mounted, and dirt, dust, etc. are placed inside the solid-state solid-state imaging device 2 and the CCD holder 4 surrounding the solid-state imaging device 2. To prevent dust from adhering or entering. Next, the disk 4a of the CCD holder 4 is fitted into the concave portion 5a2 of the lens mount 5, and the screw 7 is inserted from the insertion hole 5a1 and screwed into the mounting screw hole 4a2, thereby mounting the lens mount 5 on the C.
Fix to the CD holder 4 and mount the lens 6 on the lens mount 5
Is fixed with screws 8. When the male screw 6a1 is provided in the mounting portion 6a of the lens 6, the male screw 6a1 is screwed and fixed to the female screw 5b2 formed in the lens fixing portion 5b.

[0014]

As described above, according to the lens mount for a board camera according to the present invention, only light of a required wavelength passes through the center of the disk in opposition to the solid-state imaging device mounted on the substrate. A CCD holder that fixes the optical filter, provides a mount mounting portion on the peripheral edge, and forms a cylindrical substrate mounting portion that surrounds the solid-state imaging device and mounts to the substrate on the back surface inside the mount mounting portion, The CC on the back of the holder mounting part corresponding to the mount mounting part
Since a circular concave portion for fitting the disk of the D holder is provided, and a lens mount having a cylindrical lens fixing portion for mounting a lens for forming an image on the solid-state imaging device is provided in the center of the front surface. Replace the lens mount with a lens fixing part corresponding to the lens to be mounted, fit the disc of the CCD holder into the concave part of the lens mount and mount it. Since it can be attached, the cost of parts and the cost of work can be reduced. Further, since the CCD holder does not need to be replaced, the replacement work does not need to be performed in a clean room, and the work cost can be reduced. That is, mass production can be performed as a common unit until the CCD holder is mounted on the substrate on which the solid-state imaging device is mounted. In a separate step, a lens mount corresponding to the lens is circularly mounted in accordance with the type of lens to be mounted. Production and shipping can be performed by fitting the disc of the CCD holder into the recess and mounting it. Therefore, by mass-producing parts that require high operating costs, many models corresponding to the purpose of use can be produced at low cost. be able to.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a lens mount for a board camera according to the present invention, wherein FIG.
(B) is a side sectional view.

FIG. 2 is an exploded perspective view of a main part showing an embodiment of a lens mount for a board camera according to the present invention.

FIG. 3 is a side sectional view showing a main part of another embodiment of a lens mount for a board camera according to the present invention.

4A and 4B are side sectional views showing a conventional lens mount for a board camera, in which FIG. 4A shows an example in which the lens mount is formed integrally, and FIG.

[Explanation of symbols]

 Reference Signs List 1 substrate 2 solid-state imaging device 3 optical filter 4 CCD holder 4a disk 4a1 hole 4a2 mounting screw hole 4b substrate mounting portion 5 lens mount 5a holder mounting portion 5a1 insertion hole 5a2 concave portion 5b lens fixing portion 5b1 screw hole 5b2 female screw 6 lens Mounting part 6a1 Male screw 7, 8 screw

Claims (5)

[Claims] An optical filter that passes only light of a required wavelength is fixed to a center of a disk facing a solid-state imaging device mounted on a substrate, and a mount mounting portion is provided on a peripheral portion of the optical filter. A CCD holder having a cylindrical substrate mounting portion surrounding the solid-state imaging device on the back surface inside the mounting portion and mounting the solid-state imaging device on the substrate; and the solid-state imaging device in the center of the front surface of the holder mounting portion corresponding to the mount mounting portion. In a lens mount for a board camera, comprising: a lens mount provided with a cylindrical lens fixing portion for mounting a lens for forming an image thereon, a circular shape in which a disk of the CCD holder is fitted to a back surface of the holder mounting portion. A lens mount for a board camera, characterized by having a concave portion. 2. The mounting portion has a mounting screw hole at a peripheral edge thereof, and the holder mounting portion has an insertion hole through which a screw portion of a screw screwed into the mounting screw hole is inserted. The lens mount for a board camera according to claim 1, wherein: 3. The mount mounting portion has a mounting hole on a peripheral edge thereof, and the holder mounting portion has a screw hole for screwing a screw inserted into the mounting hole. The lens mount for a board camera according to claim 1. 4. A lens for a board camera according to claim 1, wherein a female screw corresponding to a male screw formed on an outer periphery of said lens mounting portion is formed on an inner periphery of said lens fixing portion. mount. 5. A lens fixing part of the lens mount,
2. The lens mount for a board camera according to claim 1, wherein a screw hole is provided from an outer periphery to an inner periphery of the lens fixing portion.