JP2012049581A - Position adjustment mechanism for solid state imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components of intermediate members required for adjusting a position of a solid state imaging device.SOLUTION: A lens casing 2 holding an image formation lens 1 has a support pin 5 press-fitted in a coupling position of an intermediate support member 4, and the support pin 5 has a screw 13 for attaching the intermediate support member 4 and a screw hole 5a for fitting the screw. The intermediate support member 4 bonding and fixing a solid state imaging device 3 is attached via O-rings 6, 7, 16. Positioning of the intermediate support member 4 in the Z direction, θ1 direction and θ3 direction is performed by adjusting the screw-in amount of the screw 13 and changing compressive force on the O-rings 7, 16. Positioning of the intermediate support member 4 in the X direction, Y direction and θ2 direction is performed by adjusting the screw-in amount of the screws 11, 12 disposed on the periphery of the intermediate support member 4 and changing compressive force on the O-ring 6.

Description

  The present invention relates to a position adjustment mechanism for a solid-state imaging device mounted on an optical device that is mounted on an artificial satellite and acquires image data of earth observation.

  In order to adjust the position of this type of conventional solid-state image sensor in six directions, at least two intermediate support members for position adjustment are provided between the imaging lens and the solid-state image sensor. For example, in the solid-state imaging device mounting apparatus described in Patent Document 1, two intermediate support members are provided, and the first intermediate support member is mounted by adjusting the directions of X, Z, θ1, and θ3. This is a mechanism for adjusting the directions of Y and θ2 with an intermediate support member.

  In addition, in the solid-state imaging device mounting apparatus described in Patent Document 2, three intermediate support members are provided, and the first intermediate support member is mounted by adjusting the directions of X, Z, and θ1, and the second intermediate support member. The direction of X3, Y, and θ2 is adjusted and attached, and the direction of θ3 is adjusted by a third intermediate support member to which the solid-state image sensor is fixed.

  As described above, the mechanism for adjusting the conventional solid-state imaging device in six directions requires two or more intermediate support members for position adjustment, and a dedicated jig for adjusting the position of the intermediate support member is necessary. The adjustment means is also complicated and requires a lot of time for adjustment. Furthermore, the mounting area of the adjustment mechanism of the solid-state imaging device is large, and there is a problem that recent artificial satellites that are required to be miniaturized cannot fit in the apparatus.

Japanese Patent Laid-Open No. 5-341164 Japanese Patent Laid-Open No. 6-148489

  The problem to be solved is that the number of parts of the intermediate member necessary for adjusting the position of the solid-state imaging device is large.

  In order to reduce the number of intermediate members necessary for adjusting the position of the solid-state imaging device, the present invention has the most main feature in which an O-ring is fitted to a portion where the intermediate support member is fastened to the lens housing.

  The position adjustment mechanism of the solid-state imaging device according to the present invention has two intermediate and three O-rings mounted on the fastening portion between the lens housing and the intermediate supporting member holding the solid-state imaging device. Even with a single component, it is possible to adjust in six directions as before, so the number of components required for adjustment can be reduced, the mounting area of the adjustment mechanism can be reduced, and the device can be reduced in size and weight. Have. In addition, since the position of the intermediate support member is adjusted using only the parallel movement of the screw as the screw rotates, the adjustment is easy, and no dedicated jig is required for position adjustment. It also has an effect that can be realized.

It is sectional drawing which shows Example 1 of the position adjustment mechanism of the solid-state image sensor which concerns on this invention. It is a disassembled perspective view which shows Example 1 of the position adjustment mechanism of the solid-state image sensor which concerns on this invention. It is detail sectional drawing of the fastening part of a lens housing | casing and an intermediate support member. It is a figure for demonstrating adjustment to the Z direction of a solid-state image sensor. It is a figure for demonstrating the adjustment to (theta) 2 direction of a solid-state image sensor.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a first embodiment of the position adjusting mechanism of the solid-state imaging device according to the present invention. In FIG. 1, the solid-state imaging device 3 is bonded and fixed to an intermediate support member 4, and has X, Y, Z, θ1, θ2, θ3 with the imaging lens 1 held by the lens housing 2. The structure can be adjusted in six directions. Refer to FIG. 2 for the six directions of X, Y, Z, θ1, θ2, and θ3.

  FIG. 2 is an exploded perspective view of the position adjusting mechanism of the solid-state imaging device, and FIG. 1 is a view seen from the right side of FIG. FIG. 2 shows a state before the intermediate support member 4 is attached to the lens housing 2 as shown in FIG. Further, the six directions X, Y, Z, θ1, θ2, and θ3 are added for reference. X and Y are two axes in the same horizontal plane as the mounting surface, Z is a vertical axis with respect to the horizontal plane, and θ1, θ2, and θ3 indicate rotational directions around the X, Y, and Z axes. The solid-state imaging device 3 is bonded and fixed to the intermediate support member 4 so that the terminal 3 a passes through the two long holes 4 d and 4 e of the intermediate support member 4. The terminal 3a is soldered with a substrate or a wire, and mediates an electrical signal to be transmitted to an amplifier circuit or the like (not shown).

  The intermediate support member 4 is attached to the imaging lens 1 so as to enter the frame of the lens housing 2, and a “window” for securing an optical path between the solid-state imaging device 3 and the imaging lens 1. Is given. The intermediate support member 4 is provided with one pin hole 4a at the upper center of the long hole 4d and two pin holes 4b and 4c at the lower left and right symmetrical positions of the long hole 4e. The distance between the pin holes 4a and 4b is equal to the distance between the pin holes 4a and 4c. That is, the pin holes 4a, 4b, 4c are located at the apexes of a triangle located at the center of the mounting surface of the intermediate support member. And the attachment position of the solid-state image sensor 3 exists between the pin holes 4a and 4b and between the pin holes 4a and 4c.

  The lens housing 2 is provided with pin holes 2g, 2h, 2i at positions corresponding to the pin holes 4a, 4b, 4c. The intermediate support member 4 is attached by attaching three pin holes 4a, one end of which is driven into the pin holes 2g, 2h, 2i and fixed to the other end of the three support pins 5. This is done by screwing three mounting screws 13a, 13b and 13c through 4b and 4c.

  FIG. 3 is a detailed cross-sectional view of the fastening portion between the lens housing 2 and the intermediate support member 4 by the mounting screw 13 (13a, 13b, 13c in FIGS. 1 and 2). The support pin 5 is a cylinder having a four-stage diameter and has a complicated cross section, as indicated by hatching. The right side merely forms the convex part 5b which is driven into the pin holes 2g, 2h and 2i and fixed to enter the thick part of the lens housing 2. However, the left side that cannot be driven into the pin holes 2g, 2h, and 2i has three stages of diameters, and tapered portions 5e and 5d are provided at the diameter switching portions. A portion from the largest diameter to the next diameter is hollowed, and a screw hole 5a for fitting with an attachment screw 13 for attaching the intermediate support member 4 is provided.

  The tapered portion 5e is formed in a portion that changes from the maximum diameter to the next diameter, and a large O-ring 6 is fitted in contact with the left side of the tapered portion 5e. The tapered portion 5e prevents the O-ring 6 from being displaced. The inner diameter of the O-ring 6 is slightly smaller than the outer diameter 5c between the tapered portion 5e and the tapered portion 5d, and the outer diameter of the O-ring 6 is processed to be larger than the outer diameter of the pin holes 4a, 4b, 4c. . As a result, the O-ring 6 is mounted in a slightly compressed state, and there is no gap in the vertical direction between the support pin 5 and the pin holes 4a, 4b, 4c.

  The tapered portion 5d is formed in a portion that changes from the diameter in which the O-ring 6 is fitted to the minimum diameter, and a small O-ring 7 is fitted in contact with the left side of the tapered portion 5d. The tapered portion 5d prevents the O-ring 7 from being displaced. The diameter of the O-ring 7 is selected so that there is no gap in the left-right direction between the support pin 5 and the pin holes 4a, 4b, 4c.

  The intermediate support member 4 is attached to the support pin 5 by a mounting screw 13 and a washer 14 via a spacer 15 and an O-ring 16. Similar to the support pin 5, the spacer 15 is provided with a taper 15 a for preventing the positional deviation of the O-ring 16. The intermediate support member 4 is attached to the lens housing 2 by rotating the attachment screw 13. Here, the O-rings 67 and 16 provide a reaction force equal to the force pushed by a screw, and may be replaced with another elastic body such as a spring.

  As described above, the intermediate support member 4 is attached to the lens housing 2 in the Z direction, and the position adjustment in the Z, θ3, and θ1 directions can be performed by the attachment screw 13 as described later. However, other means are required for position adjustment in other directions.

  Referring again to FIG. 2, the screw holes 2 a and 2 d for the set screws 11 a and 11 d and the two bottom surfaces of the lens housing 2 are disposed at two locations on the top surface of the lens housing 2 in order to adjust the positions in the Y and θ 2 directions. Are provided with screw holes 2b, 2c for set screws 11b, 11c. The set screws 11a to 11d are positioned symmetrically in the vertical and horizontal directions forming the apex of the quadrangle. By rotating the set screws 11a to 11d, the tip portions thereof come into contact with the upper surface and the lower surface of the intermediate support member 4 attached as described above.

  In addition, screw holes 2e and 2f for set screws 12a and 12b are provided at two central positions on the side surface of the lens housing 2 in order to adjust the position in the X direction. By rotating the set screws 12a and 12b, the front ends thereof come into contact with the left side surface and the right side surface of the intermediate support member 4 attached as described above. The front ends of the set screws 11a to 11d, 12a, and 12b are spherical so that the intermediate support member 4 can come into contact with any position.

  Next, a procedure for adjusting the position of the solid-state imaging device 3 in six directions of X, Y, Z, θ1, θ2, and θ3 will be described. The position adjustment in the Z, θ1, and θ3 directions is performed by adjusting the force in the direction perpendicular to the intermediate support member 4, and the position adjustment in the X, Y, and θ2 directions is performed by adjusting the force in the in-plane direction of the intermediate support member 4. Perform by adjustment.

  Adjustment in the directions of Z, θ1, and θ3 is performed by adjusting the screwing amount of 13 screws. To adjust in the Z direction, the three mounting screws 13a, 13b, 13c are rotated by the same amount in the same direction. For example, as shown in FIG. 4A, the O-rings 16 and 7 are compressed (see FIG. 3) when the mounting screw 13 is rotated in the tightening direction (a), as shown in FIG. 4B. Next, the intermediate support member 4 is moved in the direction b). Since the solid-state imaging device 3 is bonded and fixed to the intermediate support member 4, it moves in the same manner. 4A is a front view of the present position adjustment mechanism as viewed from the intermediate support member 4 side, and FIG. 4B is a side view of the present position adjustment mechanism as viewed from the right side.

  In the adjustment in the θ1 direction, the two mounting screws 13b and 13c are rotated in opposite directions, respectively, one compresses the O-ring 7 and the other opens the O-ring 7. Thus, the intermediate support member 4 can adjust around the Y axis, that is, in the θ1 direction. When the rotation amounts of the mounting screws 13b and 13c are the same, the intermediate support member 4 rotates around the intermediate position of the mounting screws 13b and 13c.

  In the adjustment in the θ3 direction, the two mounting screws 13b and 13c and the mounting screw 13a are rotated in opposite directions, one of which compresses the O-rings 16 and 7, and the other opens the O-rings 16 and 7. Accordingly, the intermediate support member 4 can adjust around the X axis, that is, in the θ3 direction.

  Even when the intermediate support member 4 is inclined at the time of adjusting θ1 and θ3, the O-ring 16 is fitted between the screw head of the screw 13 and the intermediate support member 4, so that the screw head does not come into contact with each other. The support member 4 can be pressed down.

  FIG. 5 is a view for explaining an adjustment example in the θ2 direction, and is a front view when the position adjustment mechanism is viewed from the intermediate support member 4 side, as in FIG. 4A. The set screws 11a and 11b are rotated in the c) direction, and the set screws 11c and 11d are rotated in the d) direction. Each set screw moves in the direction of e), and the intermediate support member 4 is pushed by the set screws 11a and 11c. As a result, the O-ring 6 is compressed, and since the intermediate support member 4 is sandwiched between the O-rings 16 and 7, the intermediate support member 4 rotates in the direction of G). At this time, the amount of rotation of the set screw (11b, 11d in the example of FIG. 5) that moves in the direction away from the intermediate support member 4 is made larger than the pushing side, and only the set screws 11a, 11c on the pushing side are in the middle. It is made to contact with the support member 4.

  Adjustment in the X and Y directions is simple. The adjustment in the Y direction is performed by moving the intermediate support member 4 in the Y direction by rotating the set screws 11a to 11d in the same direction. Similarly, adjustment in the X direction is performed by rotating the set screws 12a and 12b in the same direction and moving the intermediate support member 4 in the X direction.

  As described above, the O-rings 6, 7, 16 mounted between the intermediate support member 4 and the support pins 5 are compressed or released in accordance with the parallel movement of the screws by rotating the mounting screws 13 and the set screws 11, 12. By doing so, it is possible to move the intermediate support member 4 in six directions and adjust the solid-state imaging device 3 in six directions.

  After the adjustment work is completed, it is preferable to fix the intermediate support member 4 by pouring an adhesive between the intermediate support member 4 and the lens housing 2 so that the intermediate support member 4 is not displaced due to loosening of screws or the like.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

  (Appendix 1) A position adjusting mechanism for a solid-state imaging device for adjusting a position with respect to the imaging lens, wherein the lens housing having a rectangular parallelepiped holding the imaging lens and the solid-state imaging device are bonded and fixed. A flat rectangular parallelepiped intermediate support member that is attached so as to enter the frame of the body, and a support pin that is fixed and fitted into the lens housing and three sets of pin holes provided in the intermediate support member, respectively And three mounting screws that are screwed into screw holes provided in the support pins to fasten the intermediate support member to the lens housing, and each of the pin holes has the same two sides as the solid-state imaging It is applied to the apex position of a triangle located at the center of the mounting surface of the intermediate support member across the mounting position of the element, and an O-ring is fitted to the fastening portion to adjust the rotation of the three mounting screws. Ri said mounting surface and the vertical direction Z and the horizontal plane X, axial rotation θ3 of Y, the position adjusting mechanism of the solid-state imaging device is characterized in that to allow three-way alignment of .theta.1.

  (Appendix 1) The O-ring is composed of a large O-ring and two small O-rings, the outer diameter of the large O-ring is larger than the diameter of the pin hole of the intermediate support member, and the small O-ring is the intermediate support The position adjustment mechanism of the solid-state image pickup device according to appendix 1, wherein a diameter is formed such that a gap is not formed between a pin hole on a member side and a head of the mounting screw and a rear end of the support pin. .

  (Supplementary Note 3) The outer diameter of the screw hole portion of the support pin decreases in three steps toward the inner surface of the intermediate support member, and the diameter switching portion has a tapered portion for preventing the O-ring from being displaced. The position adjustment mechanism for a solid-state imaging device according to appendixes 2 and 2, wherein:

  (Supplementary Note 4) Four screw holes are provided at two positions on the top and bottom surfaces of the lens casing, which are symmetric with respect to the upper and lower sides, and are screwed into the two positions on the lower surface. By rotating a set screw to bring the tip of the intermediate support member into contact with the upper and lower surfaces of the intermediate support member, and adjusting the rotation, the vertical direction Y in the horizontal plane and the Z-axis rotation θ2 are adjusted in two directions. The position adjustment mechanism for a solid-state image pickup device according to any one of appendices 3 to 3, wherein

  (Additional remark 5) In the center part of the frame of the lens housing, two screw holes are provided at two positions on the left and right symmetrical side surfaces, and a set screw to be screwed in is rotated to rotate the left surface of the intermediate support member. The position adjustment of the solid-state imaging device according to any one of appendices 4 to 4, wherein the position of the horizontal direction X in the horizontal plane can be adjusted by bringing the tip portion into contact with the right surface and adjusting the rotation. mechanism.

  (Additional remark 6) The front-end | tip of the said set screw is spherical shape so that it can contact | connect the surface of the said frame part of the said intermediate support member whatever position state the said intermediate support member becomes The position adjusting mechanism of the solid-state imaging device according to any one of supplementary notes 4 and 5, wherein

DESCRIPTION OF SYMBOLS 1 Imaging lens 2 Lens housing 3 Solid-state image sensor 4 Intermediate support member 5 Support pin 6, 7, 16 O-ring 14 Washer 15 Spacer 2a-2f Screw hole 2g-2i Pin hole 4a-4c Pin hole 4d, 4e Elongated hole 5a Screw hole 11a to 11d Set screw 12a, 12b Set screw 13a, 13b Mounting screw

Claims (6)

A position adjustment mechanism for a solid-state imaging device that adjusts the position of the imaging lens,
A rectangular parallelepiped lens housing holding the imaging lens;
A flat rectangular parallelepiped intermediate support member to which a solid-state imaging element is bonded and fixed and attached into a frame of the lens housing;
Support pins that are respectively fixed and fitted into the lens housing and three sets of pin holes provided in the intermediate support member;
Having three mounting screws that are screwed into screw holes provided in the support pins to fasten the intermediate support member to the lens housing;
The pin hole is provided at the apex position of a triangle located at the center of the mounting surface of the intermediate support member, with two equal sides straddling the mounting position of the solid-state imaging device, and an O-ring is fitted to the fastening portion, The position of the solid-state imaging device is characterized by adjusting the position of the mounting surface in the three directions of the vertical rotation Z and the horizontal rotation X, Y of the horizontal plane X, Y by adjusting the rotation of the three mounting screws. Adjustment mechanism. The O-ring consists of a large O-ring and two small O-rings,
The outer diameter of the large O-ring is larger than the diameter of the pin hole of the intermediate support member,
2. The small O-ring has a diameter that does not allow a gap between the pin hole on the intermediate support member side and the head of the mounting screw and the rear end of the support pin. The position adjustment mechanism of the solid-state image sensor described in 1.   The outer diameter of the screw hole portion of the support pin decreases in three steps toward the inner surface of the intermediate support member, and the diameter switching portion is provided with a tapered portion to prevent the O-ring from being displaced. The position adjusting mechanism of the solid-state imaging device according to claim 1 or 2.   In the central part of the frame of the lens housing, four screw holes are made at two positions on the upper and lower symmetrical upper and lower sides that form a vertex of a quadrangle, and a set screw screwed into this is rotated. The tip of the intermediate support member is in contact with the upper and lower surfaces of the intermediate support member, and the rotation is adjusted to adjust the position in the two directions of the vertical direction Y and the Z-axis rotation θ2 in the horizontal plane. The position adjusting mechanism for a solid-state imaging device according to claim 1,   In the central part of the frame of the lens housing, two screw holes are provided at two positions on the left and right symmetrical side surfaces, and set screws screwed into the screw holes are rotated so that the left and right surfaces of the intermediate support member 5. The position adjustment mechanism for a solid-state imaging device according to claim 1, wherein a position of the horizontal direction X in the horizontal plane can be adjusted by contacting a tip and adjusting the rotation.   The end of the set screw has a spherical shape so that it can contact the surface of the frame portion of the intermediate support member regardless of the position of the intermediate support member. Item 6. A position adjusting mechanism for a solid-state imaging device according to Item 4 or 5.

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