JP2004287304A - Imaging device mounting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a one-sided blurring phenomenon, etc by adjusting the setting angle of an imaging device such as a CCD loaded on a digital camera etc. <P>SOLUTION: When mounting the imaging device 30 on a housing 10 for holding a lens 1, an elastic member 20 is arranged in the recessed part 11 of the housing 10, the imaging device 30 is arranged in contact with the elastic member 20, a plate-like fixing member 40 is arranged behind the imaging device 30 and fixed to the trailing end face 12 of the housing 10, then, three adjusting screws 50 thread-engaged with the fixing member 40 and whose leading ends come into contact with the rear side 33 of the imaging device 30 are suitably driven, then, the elastic member 20 is suitably compressed and deformed, then, the setting angle of the imaging device 30 is adjusted. Thus, the image forming surface of the imaging device can be corrected so as to be vertical to the optical axis, and also, the one-sided blurring phenomenon can be eliminated by inclining the imaging device (image forming surface) with reference to a lens generating one-sided blurring and correcting the angle of the imaging device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image sensor mounting device for mounting an image sensor such as a CCD mounted on a digital camera or the like, and more particularly to an image sensor mounting device capable of aligning a lens included in a lens barrel with respect to an optical axis.
[0002]
[Prior art]
2. Description of the Related Art As a conventional mounting device for fixing an image pickup device such as a CCD, a mounting portion (base plate) is formed behind a lens barrel (housing) holding a lens, and a rectangular protection having an inclined surface in the mounting portion. The vibration-absorbing rubber is placed, the edge of the CCD (image sensor) is placed in contact with the inclined surface of the vibration-proof rubber, and the CCD is fixed by pressing the back surface of the CCD with a heat radiating plate. There is known a device that uses a surface to obtain a centering effect of aligning the center of a CCD with the center of a lens (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP, 2002-300441, A
[Problems to be solved by the invention]
By the way, since the lens and the CCD are mounted on the basis of the predetermined position of the lens barrel, the imaging plane of the CCD does not become perpendicular to the optical axis of the lens due to the dimensional accuracy of the lens barrel or the variation in mounting. It may be installed in an inclined state. Further, even if the image forming plane of the CCD is perpendicular to the optical axis of the lens, an image formed on the CCD may cause a partial blurring phenomenon due to a variation in dimensional accuracy of the lens.
In the conventional mounting device, even if an attempt is made to address these problems, adjustment after mounting is impossible because only the centering action is obtained.
[0005]
Therefore, if the image plane of the CCD is inclined with respect to the optical axis, it is necessary to remove and reassemble the lens or the CCD. Had to be removed and replaced with another lens. Such reassembly or replacement work is very complicated, resulting in an increase in management cost and an increase in product cost.
[0006]
The present invention has been made in view of the above circumstances, and a purpose thereof is to reassemble or reassemble the image pickup device even when the image pickup device is attached at an angle or when a one-sided blur phenomenon occurs. It is an object of the present invention to provide an image pickup device mounting apparatus which can solve these problems only by a simple adjustment operation after mounting without replacing a lens.
[0007]
[Means for Solving the Problems]
The image pickup device mounting apparatus of the present invention is a housing for holding a lens, and mounting means for mounting the image pickup device to the housing behind the lens, the image pickup device mounting apparatus, wherein the mounting means, It is characterized by including an angle adjusting mechanism for adjusting the mounting angle of the imaging element with respect to the optical axis of the lens.
According to this configuration, in a state where the lens and the image sensor are assembled to the housing (for example, a lens barrel), when the imaging plane of the image sensor is not perpendicular to the optical axis of the lens, or If the image has a one-sided blur phenomenon, the image plane can be corrected perpendicular to the optical axis by adjusting the mounting angle of the image sensor appropriately by the angle adjustment mechanism, and the one-sided blur occurs. By tilting the image sensor (image forming plane) with respect to the lens to be corrected and performing angle correction according to the one-sided blur, the one-sided blur phenomenon can be eliminated.
[0008]
In the above configuration, the angle adjustment mechanism includes an elastic member that is elastically deformable and interposed between the housing and the imaging element, a fixing member fixed to the housing behind the imaging element, and screwed to the fixing member. And an adjustment screw that contacts the rear surface of the image sensor.
According to this configuration, when adjusting the mounting angle of the imaging element, if the screwing amount of the adjusting screw screwed to the fixing member is appropriately adjusted, the deformation amount of the elastic member changes according to the screwing amount, and the imaging element is changed. Changes the mounting angle (inclination angle). Thereby, the mounting angle of the image sensor can be adjusted as needed.
[0009]
In the above configuration, a configuration can be adopted in which the adjustment screws include three adjustment screws arranged at the vertices of a triangle on the surface of the fixing member substantially perpendicular to the optical axis.
According to this configuration, by adjusting the screw-in amounts of the three adjustment screws, the mounting angle of the image sensor can be easily and accurately adjusted.
[0010]
In the above configuration, it is possible to adopt a configuration including a circuit board disposed behind the fixing member and connecting the terminal of the image sensor, wherein the circuit board has an opening that allows insertion of a tool for adjusting an adjustment screw. .
According to this configuration, even after the terminals of the image sensor are connected to the circuit board, the screwing amount of the adjusting screw can be easily adjusted using the tool. Therefore, in the inspection step after the assembling step, when a one-sided blur phenomenon or the like is confirmed, the mounting angle of the imaging element can be adjusted through a tool from the outside of the circuit board. Can be easily eliminated.
[0011]
In the above configuration, it is possible to adopt a configuration in which the fixing member has an insertion portion through which the terminal of the imaging element is inserted.
According to this configuration, in a configuration in which the fixing member is disposed behind the image sensor and the circuit board is disposed behind the fixing member, the terminal of the image sensor is passed through the insertion portion (for example, a through hole or a notch), and then Can be connected to the circuit board disposed on the other side. Therefore, the terminals can be easily arranged.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 3 show an embodiment of the mounting device according to the present invention. FIG. 1 is a sectional view showing a state after assembly (attachment), and FIGS. 2 and 3 are exploded perspective views of the mounting device. FIG.
[0013]
As shown in FIG. 1, this device includes a housing (lens barrel) 10 holding a lens 1 and a low-pass filter 2, an elastic member 20 disposed behind the low-pass filter 2, and an elastic member 20. CCD 30 as an image sensor, a fixing member 40 fixed to the housing 10 behind the CCD 30, three adjusting screws 50 screwed to the fixing member 40 to contact the CCD 30, and a rear of the fixing member 40 And a circuit board 60 and the like arranged at the same time.
[0014]
As shown in FIGS. 1 and 2, a rectangular concave portion 11 is formed in the housing 10 behind the low-pass filter 2, and a flat rear end surface 12 is formed around the concave portion 11. Four screw holes 13 are formed at four corners of the end face 12.
The concave portion 11 directly holds the elastic member 20, and a positioning protrusion (not shown) is provided on a side wall of the concave portion 11 so as to align the center of the elastic member 20 with the optical axis L. The lens 1 and other lenses are arranged and held along the optical axis L in front of the inside of the housing 10.
[0015]
As shown in FIGS. 1 and 2, the elastic member 20 is formed so as to have a rectangular opening 21 in the center, and when a compressive force is applied to the end face 22, the elastic member 20 is elastically deformed in accordance with the compressive force. When the compressive force is removed, the elastic member returns to its original shape.
Further, the elastic member 20 has an adhesive property for preventing dust, dust and the like from entering the internal space when the elastic member 20 is interposed between the low-pass filter 2 and the CCD 30. Is formed of the above material.
[0016]
As shown in FIGS. 1 to 3, the CCD 30 as an image sensor has a substantially rectangular outline, a flat face plate 31 is disposed in front, and an image forming surface having a vertical line S behind the face plate 31 is formed. A plurality of terminals 32 are provided to protrude on both side surfaces, and a back surface 33 is formed flat. Here, the terminal 32 is electrically connected to an electric circuit (wiring) on the circuit board 60 described later.
[0017]
The fixing member 40 is formed of a metal plate formed in a substantially rectangular flat plate shape. In a substantially central region thereof, three screw holes 41 are provided so as to be respectively located at the vertices of a triangle, and two elongated holes are provided outside thereof. A through hole 42 is provided as a simple insertion portion, and four circular holes 43 are provided at four corners. The fixing member 40 is fixed to the housing 10 by being brought into contact with the rear end surface 12 of the housing 10 and fastening the fastening screw 45 passed through the circular hole 43 to the screw hole 13.
[0018]
At this time, the fixing member 40 is positioned and fixed so as to be substantially perpendicular to the optical axis L of the lens 1. That is, the three screw holes 41 are arranged at the vertices of the triangle on a plane substantially perpendicular to the optical axis L.
Here, the fixing member 40 is formed in a rectangular shape. However, if the fixing member 40 is firmly fixed to the rear end face 12 of the housing 10 and can be screwed with the adjusting screw 50, for example, a substantially triangular shape or other The shape may be as follows.
[0019]
In the above configuration, the three adjustment screws 50 are screwed into the respective screw holes 41 on the fixing member 40 and abut on the area A on the back surface 33 of the CCD 30 as shown in FIGS. By adjusting the screwing amount, it is possible to adjust the mounting angle of the CCD 30 (the inclination angle of the imaging surface with respect to the optical axis L) while compressing the elastic member 20.
[0020]
As shown in FIGS. 1 and 3, the circuit board 60 is formed in a substantially rectangular shape. A rectangular opening 61 is provided in the center area, and an electric circuit for connecting the terminals 32 of the CCD 30 is provided on the front surface thereof. (Wiring) 62 is provided.
Here, the connection of the terminal 32 to the electric circuit 62 may be soldered, or may be detachably connected in a fitting manner. The circuit board 60 is fixed to a main body of the digital camera on which the housing 10 is mounted, or a supporting portion (not shown) formed to protrude rearward from the housing 10 with a fastening screw or the like.
[0021]
Next, assembly of this device and adjustment of the mounting angle of the CCD 30 will be described. First, in a state where the lens 1 and the like are assembled inside the housing 10, as shown in FIG. 2, the elastic member 20 is incorporated while being positioned in the concave portion 11 of the housing 10.
Subsequently, as shown in FIG. 2, the CCD 30 is arranged so as to be placed on the end face 22 of the elastic member 20.
[0022]
Next, the fixing member 40 is mounted on the rear end face 12 of the housing 10 so that the terminal 32 of the CCD 30 passes through the through hole 42, and four fastening screws 45 are passed through the circular holes 43 and fastened to the screw holes 13. Is done. Thereby, the fixing member 40 is firmly attached to the housing 10.
[0023]
Subsequently, the three adjusting screws 50 are screwed into the screw holes 41 of the fixing member 40, and are appropriately tightened until the tips thereof contact the back surface 33 of the CCD 30 and the CCD 30 is fixed. The three adjustment screws 50 may be assembled together with the fixing member 40 in a state where the three adjusting screws 50 are all previously screwed into the fixing member 40 with the same screwing amount and are integrally held.
[0024]
Next, the circuit board 60 is disposed above the fixing member 40, and the terminals 32 are connected to the electric circuit 62. Thereby, the assembly of the entire apparatus is completed. In this state, the lens 1, the low-pass filter 2, the elastic member 20, the CCD 30 as the image sensor, the fixing member 40, the adjusting screw 50, and the circuit board 60 are sequentially arranged from the front to the rear of the subject side. Become.
[0025]
After the assembly is completed, in the inspection step, the circuit board 60 is energized to turn on the CCD 30 and photograph a predetermined subject. Then, a subject image is formed on the CCD 30 in accordance with the subject light that has entered through the lens 1 and the like, and the formed image is displayed on a separately arranged inspection monitor.
[0026]
Here, when a one-sided blur phenomenon or the like is confirmed in the displayed image, the tool D is inserted from the opening 61 of the circuit board 60 while viewing the displayed image as shown in FIG. Then, the screwing amounts of the three adjusting screws 50 are appropriately adjusted. Thereby, the mounting angle of the CCD 30 with respect to the optical axis L of the lens 1 is adjusted, and the one-sided blur state can be eliminated. At this time, since the three adjustment screws 50 are appropriately adjusted, the mounting angle of the CCD 30 can be easily and accurately adjusted.
[0027]
In this way, even after the assembly of the apparatus is completed, the one-sided blur phenomenon can be eliminated only by adjusting the adjusting screw 50 (tilt adjustment), so that it is not necessary to remove and reassemble the lens 1 which has been conventionally incorporated. .
Also, due to variations in product dimensions, etc., the image plane of the CCD 30 is not perpendicular to the optical axis L of the lens 1 (the vertical line S of the image plane is coaxial (parallel) with the optical axis L of the lens 1). In this case, it is possible to correct the mounting angle to be vertical by appropriately adjusting the screwing amounts of the three adjusting screws 50 as described above.
[0028]
FIG. 4 shows another embodiment of the elastic member forming a part of the mounting device according to the present invention. In this embodiment, as shown in FIG. 4, the elastic member 20 'has a rectangular opening 21' at the center using a material such as silicone rubber as described above, and has an opening 21 'at the end face 22'. It is formed so as to have a step 23 ′ in the vicinity.
[0029]
The protruding face plate 31 of the CCD 30 is adapted to the step 23 'as shown in FIG. 4B. Therefore, when the CCD 30 is placed from above the elastic member 20 ′, the center of the CCD 30 is easily aligned with the optical axis L of the lens 1 by allowing the face plate 31 to enter the step 23 ′. can do.
In the assembled state, the elastic member 20 ′ is deformed by an appropriate compressive force, so that the elastic member 20 ′ is kept in close contact with the elastic member 20 ′, so that dust and dust can be prevented from entering the internal space.
[0030]
FIG. 5 shows another embodiment of a circuit board forming a part of the mounting device according to the present invention. In this embodiment, as shown in FIG. 5, the circuit board 60 'is formed in a substantially rectangular shape, and three openings 61' corresponding to the three adjustment screws 50 are provided in a central region thereof. Four openings 62 'corresponding to the four fastening screws 45 are provided at the four corners, and an electric circuit (wiring) 63' for connecting the terminal 32 of the CCD 30 is provided on the front surface (lower surface) thereof.
[0031]
Here, instead of the rectangular opening 61 as described above, the circular opening 61 'corresponding to each adjustment screw 50 is provided, thereby allowing the insertion of the tool D from outside the circuit board 60'. In addition, the area of the circuit board 60 'can be sufficiently ensured, and the wiring can be easily and freely arranged.
Further, by providing the opening 62 ′ corresponding to the fastening screw 45, even if the terminal 32 is soldered to the electric circuit (wiring) 63 ′, the fixing member 40 can be fixed to the housing 10. Can be detached.
[0032]
FIG. 6 shows another embodiment of the fixing member forming a part of the mounting device according to the present invention. In this embodiment, as shown in FIG. 6, the fixing member 40 'is provided with three screw holes 41' respectively located at the apexes of a triangle in a substantially central area thereof, and two outside holes as insertion parts are provided outside the screw holes 41 '. Two notches 42 'are provided, and four circular holes 43' are provided at four corners.
[0033]
Therefore, when assembling, the terminal 32 of the CCD 30 is connected to the circuit boards 60 ', (60) through the notch 42' of the fixing member 40 ', so that the assembling is facilitated. Further, even after the terminals 32 are soldered to the circuit boards 60 'and (60), only the fixing member 40' can be removed, and the attachment and detachment of components can be facilitated.
Further, in a state where the fixing member 40 ′ is fixed to the housing 10, the terminal 32 is passed through a gap between the side wall of the concave portion 11 and the edge of the notch 42 ′, and this gap is made as small as possible. This can prevent dust, dust, and the like from entering the inside.
[0034]
In the above embodiment, the case where the three adjusting screws 50 screwed to the fixing member 40 are employed as the angle adjusting mechanism has been described. However, the present invention is not limited to this. If the mounting angle (inclination angle) of the CCD 30 can be adjusted using the position as a fulcrum, one or two adjustment screws 50 can be employed. Note that four or more adjustment screws 50 may be employed.
[0035]
In the above-described embodiment, a case is shown in which a through hole 42 and a notch 42 ′ for inserting the terminal 32 into the fixing members 40 and 40 ′ are provided to guide the terminal 32 of the CCD 30 to the circuit boards 60 and 60 ′. However, the present invention is not limited to this. The through holes 42 and the notches 42 ′ are not provided in the fixing members 40, 40 ′, and the terminals 32 are connected to the circuit boards 60, 60 ′ through the outside of the fixing members. You may.
[0036]
In the above embodiment, the case where the contour of the fixing member 40 is rectangular is shown. However, the present invention is not limited to this, and three fastening screws 45 are employed, and the three fastening screws 45 and three adjustments are made. The outline of the screw 50 may be substantially triangular or another shape in consideration of the arrangement of the screw 50.
[0037]
【The invention's effect】
As described above, according to the image sensor mounting apparatus according to the present invention, as the mounting means for mounting the image sensor on the housing holding the lens, the angle for adjusting the mounting angle of the image sensor with respect to the optical axis of the lens. By adopting the adjustment mechanism, if the image plane of the image sensor is not perpendicular to the optical axis of the lens in the state where the lens and the image sensor are assembled in the housing, or the image is partially blurred. When a phenomenon occurs, the image forming plane can be corrected to be perpendicular to the optical axis by appropriately adjusting the mounting angle of the image sensor using this angle adjusting mechanism, and the angle correction according to the one-sided blur can be performed. By doing so, the one-sided blur phenomenon or the like can be eliminated without replacing the lens.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of a mounting device according to the present invention.
FIG. 2 is an exploded perspective view showing one embodiment of a mounting device according to the present invention.
FIG. 3 is an exploded perspective view showing one embodiment of a mounting device according to the present invention.
4A and 4B show another embodiment of the elastic member forming a part of the mounting device, wherein FIG. 4A is a perspective view, and FIG. 4B is a cross-sectional view taken along line EE in FIG.
FIG. 5 is an exploded perspective view showing another embodiment of the circuit board forming a part of the mounting device.
FIG. 6 is an exploded perspective view showing another embodiment of a fixing member forming a part of the mounting device.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 lens 2 low-pass filter 10 housing 11 concave portion 12 rear end surface 13 screw hole 20, 20 ′ elastic member 21, 21 ′ opening 22, 22 ′ end surface 23 ′ step portion 30 CCD (imaging element)
31 face plate 32 CCD terminal 33 back surface 40,40 'fixing member 41,41' opening 42 through hole (insertion part)
42 'notch (insertion part)
43, 43 'Circular hole 45 Fastening screw 50 Adjusting screw 60, 60' Circuit board 61, 61 ', 62' Opening 62, 63 'Electric circuit (wiring)
L Optical axis S Vertical line of image plane

Claims (5)

A mounting device for an image sensor, comprising: a housing for holding a lens; and mounting means for mounting an image sensor to the housing behind the lens.
The mounting unit includes an angle adjustment mechanism that adjusts a mounting angle of the imaging device with respect to an optical axis of the lens.
A mounting device for an image pickup device, characterized in that: The angle adjustment mechanism includes an elastic member that is elastically deformable and interposed between the housing and the image sensor, a fixed member fixed to the housing behind the image sensor, and the fixed member. An adjusting screw that is screwed into contact with the back surface of the image sensor,
2. The image pickup device mounting device according to claim 1, wherein: The adjusting screw includes three adjusting screws respectively arranged at vertices of a triangle on a surface of the fixing member substantially perpendicular to an optical axis.
3. The image pickup device mounting device according to claim 2, wherein: Including a circuit board arranged behind the fixing member and connecting the terminal of the image sensor,
The circuit board has an opening that allows insertion of a tool for adjusting the adjustment screw,
The mounting device for an image sensor according to claim 2 or 3, wherein: The fixing member has an insertion portion for inserting a terminal of the image sensor,
The mounting device for an image sensor according to any one of claims 2 to 4, wherein:

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