JP6052124B2 - Tilt adjustment device - Google Patents

Description

  The present invention relates to a tilt adjusting device capable of adjusting the tilt of an optical surface of an optical component in two axial directions.

  In general, optical components such as a spatial light modulation element that displays image information and an image pickup element that captures an image use a tilt adjustment device in a state where image information output from the optical surface is displayed on a display or the like. A good image is obtained by adjusting the tilt of the optical surface.

  As an example to which this kind of tilt adjustment device is applied, there is a spatial light modulation device described in Patent Document 1.

  In the spatial light modulation device described in Patent Document 1, a plurality of spatial light modulation elements are housed in a plurality of outer frames, and a plurality of spatial light modulation elements are arranged in a matrix, for example, in 3 rows × 3 columns. Yes.

  A bright hologram reproduction image is obtained by electrically synthesizing image outputs from a plurality of spatial light modulation elements.

  5 and 6 in the same publication, as conventional tilt adjusting devices, screws and springs are provided in the vicinity of the four corners of one outer frame containing one spatial light modulator, and each screw and each spring are provided. And the inclination of the optical surface of one spatial light modulator is adjusted. In the conventional tilt adjustment device, the tilt of the optical surface is adjusted using the adjustment optical system for the nine spatial light modulation elements in total.

Japanese Patent Application Laid-Open No. 7-129067

  By the way, according to the conventional tilt adjusting device described in Patent Document 1, the inclination of the optical surface of one spatial light modulator can be adjusted with a simple configuration using, for example, four screws and four springs. However, since the optical surface rotates around the optical axis when adjusting the balance between each spring and each screw, there is a problem that it is difficult to accurately adjust the tilt angle of the optical surface.

  Therefore, an object of the present invention is to provide a tilt adjusting device that can accurately adjust the tilt angle of the optical surface when tilting the optical surface of the optical component in the biaxial direction.

The present invention has been made in view of the above problems, and includes an optical component having an optical surface, an optical component mounting member for positioning and mounting the optical component, and the optical component mounting member with a first rotation shaft. A hinge member having a first hinge portion rotatably supported at the center, and the hinge member supported rotatably about a second rotation shaft set at an angle different from the first rotation shaft. A base that is fixedly installed with a second hinge portion, and is hooked between the optical component mounting member and the hinge member, and urges the optical component mounting member toward the hinge member. A biasing means; a second biasing means that is latched between the hinge member and the base and biases the hinge member toward the base; and the optical component mounting member from the base side The one end side is moved forward and backward by the urging force of the first urging means. A first tilt adjustment member that tilts and adjusts the optical surface of the optical component about the first rotation axis through the optical component mounting member by contacting the component mounting member; The optical surface of the optical component is moved through the hinge member and the optical component mounting member by advancing and retracting toward the hinge member, and abutting one end side against the hinge member by the biasing force of the second biasing means. the a second tilt adjusting member for tilting adjustment about the second turning axis, the optical component mounting member, said one end of said first tilting adjustment member has a receiving portion contacting the optical When the surface is set parallel to the base, the contact point at which the one end portion of the first tilt adjustment member contacts the receiving portion is made to substantially coincide with the axis of the second rotation shaft. providing tilt adjustment device comprising a call.

  According to the tilt adjusting device according to the present invention, the tilt angle of the optical surface of the spatial light modulator can be adjusted with high accuracy.

(A), (b) is the perspective view which looked at the tilt adjustment apparatus which concerns on the Example of this invention from the front side and the back side, respectively. It is the disassembled perspective view which decomposed | disassembled and showed the tilt adjustment apparatus which concerns on the Example of this invention. (A), (b) is the top view and right view which showed the tilt adjustment apparatus which concerns on the Example of this invention. (A)-(c) is the tilt adjusting apparatus which concerns on the Example of this invention, The 1st-3rd at the time of making a 1st tilt adjustment member (1st screw | thread) contact | abut to the boss | hub part of an optical component mounting member. It is the figure which showed the aspect. It is the perspective view which looked at the tilt adjustment apparatus of the modification which partially deformed the tilt adjustment apparatus which concerns on the Example of this invention from the back side. It is the perspective view which showed the whole structure of the spatial light modulation device to which the tilt adjusting device which concerns on this invention was applied. FIG. 7 is a perspective view showing a remote control unit for remotely operating a plurality of tilt adjusting devices installed in the spatial light modulation device shown in FIG. 6. It is the figure which showed typically the remote control part which remote-operates the several tilt adjustment apparatus installed in the spatial light modulation apparatus shown in FIG.

  Hereinafter, embodiments of the tilt adjusting device according to the present invention will be described in detail with reference to FIGS.

  The tilt adjustment device of the embodiment uses an optical component such as a spatial light modulation element that displays image information or an imaging element that captures an image, and the image information output from the optical surface of the optical component is displayed on a display or the like. In the displayed state, the optical surface can be tilted and adjusted accurately in two axial directions.

  Further, when the tilt adjustment device of the embodiment is applied to, for example, a spatial light modulation device or the like, the tilt adjustment of the optical surface of the optical component (spatial light modulation element) in the tilt adjustment device in the biaxial direction is performed. The device is configured to be remotely controlled.

  FIGS. 1A and 1B are perspective views of the tilt adjusting device according to the embodiment of the present invention when viewed from the front side and the rear side. FIG. 2 is an exploded perspective view of the tilt adjusting device according to the embodiment of the present invention.

  As shown in FIGS. 1A, 1B, and 2, the tilt adjusting device 10 according to the embodiment of the present invention includes an optical component 11 having a rectangular or square optical surface 11a, and the optical component 11. An optical component mounting member 14 for positioning and mounting, and a hinge member having first hinge portions 16c and 16d for rotating the optical component mounting member 14 on which the optical component 11 is mounted about the first rotation shaft 17. 16 and a base 21 having second hinge portions 21c and 21d for rotating the hinge member 16 about a second rotation shaft 22 orthogonal to the first rotation shaft 17 and fixedly installed, A first biasing member 27 that biases the optical component mounting member 14 toward the hinge member 16, a second biasing member 28 that biases the hinge member 16 toward the base 21, and the optical surface 11 a of the optical component 11. The first rotation shaft 1 is provided via the optical component mounting member 14. And a first tilt adjustment member 29 having one end side in contact with the optical component mounting member 14 and a second end side supported by the base 21, and the optical surface 11 a of the optical component 11. In order to adjust the tilt around the second rotation shaft 22 through the optical component mounting member 14 and the hinge member 16, one end side is in contact with the hinge member 16 so as to be able to advance and retreat, and the other end side is supported by the base 21. The second tilt adjustment member 30 is roughly configured.

  Here, each component of the tilt adjusting device 10 according to the embodiment of the present invention will be specifically described in order.

  First, the optical component 11 will be described below with respect to the case where a spatial light modulation element that displays image information is used in this embodiment. However, the present invention is not limited to this, and an imaging element that captures an image may be used. .

  In this optical component (hereinafter referred to as a spatial light modulation element) 11, an optical surface 11a for displaying image information using LCOS (Liquid Crystal On Silicon) is formed in a rectangular shape.

  The optical surface 11a of the spatial light modulator is shown in a rectangular shape in FIG. 1A, but may be a square shape.

  The optical surface 11a of the spatial light modulator 11 has first and second sides 11a1 and 11a2 facing each other with a gap K1 (only shown in FIG. 2) on the left and right sides, and the first and second sides 11a1 and 11a2. Is surrounded by the third and fourth sides 11a3 and 11a4 facing each other with a gap K2 (shown only in FIG. 2).

  Accordingly, the left and right ends in the longitudinal direction of the optical surface 11a of the spatial light modulator 11 correspond to the first and second sides 11a1 and 11a2, and the front and rear ends in the short direction of the optical surface 11a are the third and fourth sides 11a3 and 11a3. 11a4.

  In the spatial light modulator 11, a flexible substrate 12 is connected to the side surface corresponding to the left first side 11a1 of the optical surface 11a.

  The outer periphery of the optical surface 11a of the spatial light modulator 11 is covered with a light shielding plate 13, and a hole 13a (shown only in FIG. 2) facing the optical surface 11a penetrates the light shielding plate 13 in a rectangular shape. Is formed. The light shielding plate 13 blocks stray light caused by reflection outside the image display area of the optical surface 11a.

  The optical component mounting member 14 on which the spatial light modulator 11 is mounted has a convex upper surface 14a that is short on the side corresponding to the second side 11a2 on the right side of the optical surface 11a of the spatial light modulator 11 and is upward. It is formed in a convex shape toward. The optical component mounting member 14 is recessed by one step from the convex upper surface 14 a downward by the thickness of the spatial light modulation element 11, and the mounting surface 14 b is formed flat according to the outer shape of the spatial light modulation element 11. Yes.

  Then, the side surface side corresponding to the second side 11a2 on the right side of the optical surface 11a of the spatial light modulation element 11 is positioned and brought into contact with the inside of the convex upper surface 14a of the optical component mounting member 14 to thereby contact the optical component. The lower surface 11b of the spatial light modulator 11 is mounted on the mounting surface 14b of the mounting member 14 and fixed using an adhesive or the like.

  Further, the arm portion 14 c is formed so as to protrude from the convex upper surface 14 a of the optical component mounting member 14 in a direction away from the second side 11 a 2 on the right side of the optical surface 11 a of the spatial light modulator 11.

  The arm portion 14c of the optical component mounting member 14 has an inner space between the inner sides of the pair of front and rear first hinge portions 16c and 16d formed on the hinge member 16 described later with an outer distance K3 between the outer sides in the front-rear direction (only FIG. 2 shown). It is formed shorter than the interval K4 (shown only in FIG. 2). The arm portion 14c is formed with a shaft hole 14c1 (only FIG. 2 is illustrated) through which a later-described first rotation shaft 17 is fitted.

  In addition, a second rotating shaft 22 (22A, 22B), which will be described later, has a boss portion 14e at a substantially central portion of the fourth side 11a4 behind the optical surface 11a of the spatial light modulator 11 in the lower surface 14d of the optical component mounting member 14. ) Projecting downward to a height substantially matching the axis of. One end portion side of a first tilt adjustment member (first screw) 29 described later is in contact with the boss portion 14e so as to freely advance and retract.

  Note that the boss portion 14e of the optical component mounting member 14 is not located at the substantially central portion of the fourth side 11a4 of the optical surface 11a, but is substantially the same as the axis of the second rotation shaft 22 (22A, 22B) described later when viewed from above. It suffices if the in-plane position matches.

  A first biasing member 27 to be described later is hooked on the side corresponding to the first and third sides 11a1 and 11a3 of the optical surface 11a of the spatial light modulator 11 on the lower surface 14d of the optical component mounting member 14. One spring latching plate 15 is attached.

  The hinge member 16 that tilts the optical component mounting member 14 about the first rotation shaft 17 has an upper surface 16a and a lower surface 16b that are both flat. Further, the hinge member 16 has a pair of front and rear first hinge portions 16c and 16d protruding upward on the side corresponding to the second side 11a2 on the right side of the optical surface 11a of the spatial light modulator 11 on the upper surface 16a. Is formed.

  The first hinge portions 16c and 16d of the hinge member 16 are parallel to the front and rear third and fourth sides 11a3 and 11a4 of the optical surface 11a of the spatial light modulator 11, and outside the right second side 11a2. Are opposed to each other with an inner distance K4 between the inner sides (shown only in FIG. 2).

  Further, shaft holes 16c1 and 16d1 (only FIG. 2 are shown) through which the first rotation shaft 17 is fitted are formed through the first hinge portions 16c and 16d of the hinge member 16, respectively.

  The first rotation shaft 17 is parallel to the left and right first and second sides 11a1 and 11a2 of the optical surface 11a of the spatial light modulator 11 and has a second side as shown in FIG. It is provided at a position deviated outward from 11a2.

  At this time, the first rotation shaft 17 only needs to be parallel to the left and right first and second sides 11a1 and 11a2 of the optical surface 11a of the spatial light modulator 11. It may be installed on the right side outside the second side 11a2 of the optical surface 11a so that the span between the first rotation shaft 17 and a first tilt adjustment member (first screw) 29 described later can be set longer. desirable. As a result, the tilt angle of the optical surface 11a can be minutely displaced around the first rotation axis following the amount of advancement / retraction of the first tilt adjustment member (first screw) 29 that moves forward and backward.

  Between the first hinge portions 16 c and 16 d of the hinge member 16, the arm portion 14 c of the optical component mounting member 14 and the first compression spring 18 are fitted through the first rotation shaft 17. The first rotating shaft 17 is pivotally supported in shaft holes 16c1 and 16d1 (shown only in FIG. 2) of the first hinge portions 16c and 16d, and the E rotating washer 19 prevents the first rotating shaft 17 from coming off. ing.

  At this time, thrust play is prevented with respect to the arm portion 14c by pressing the arm portion 14c of the optical component mounting member 14 to the front first hinge portion 16c side by the first compression spring 18.

  As a result, the optical component mounting member 14 on which the spatial light modulator 11 is mounted can be tilted about the first rotation shaft 17 pivotally supported by the first hinge portions 16c and 16d of the hinge member 16. Yes.

  In addition, a pair of left and right support pieces 16e and 16f are formed to protrude downward on the left and right end portions on the lower surface 16b side of the hinge member 16, respectively.

  The support pieces 16e and 16f of the hinge member 16 are parallel to the left and right first and second sides 11a1 and 11a2 of the optical surface 11a of the spatial light modulator 11 and are located between the inner sides at positions near the rear fourth side 11a4. With an inner distance K5 (only shown in FIG. 2).

  At this time, an inner distance K5 between the support pieces 16e and 16f of the hinge member 16 is an outer distance K6 between the outer sides of a pair of left and right second hinge portions 21c and 21d formed on a base 21 described later (only FIG. 2 is shown). ) Is formed longer.

  Further, shaft holes 16e1 (only shown in FIG. 2) and 16f1 (not shown) through which the second rotating shafts 22 (22A and 22B) are fitted penetrate the support pieces 16e and 16f of the hinge member 16, respectively. Is formed.

  The second rotating shaft 22 is parallel to the third and fourth sides 11a3 and 11a4 before and after the optical surface 11a of the spatial light modulator 11, and as shown in FIG. 11a4 is provided in the vicinity.

  At this time, the second rotating shaft 22 only needs to be parallel to the third and fourth sides 11a3 and 11a4 before and after the optical surface 11a of the spatial light modulator 11. It is desirable to install in the vicinity of the 4th side 11a4 of the optical surface 11a so that the span between the 2nd rotation axis | shaft 22 and the 2nd tilt adjustment member (2nd screw) 30 mentioned later can be set long. As a result, the tilt angle of the optical surface 11a can be slightly displaced around the second rotation axis by following the amount of advancement / retraction of the second tilt adjustment member (second screw) 30 that moves forward and backward.

  First and second biasing members 27 and 28 to be described later are hooked on the front side corresponding to the third side 11a3 in front of the optical surface 11a of the spatial light modulator 11 on the upper surface 16a of the hinge member 16. A spring hooking bracket 20 formed by bending the first and second bent pieces 20a and 20b is attached.

  A first recess 16g is cut out on the upper surface 16a of the hinge member 16 on the left side of the spring latching bracket 20 in the figure, and the first bent piece 20a of the spring latching bracket 20 is formed in the first recess 16g. And a first urging member 27 to be described later.

  A second recess 16h is cut out on the upper surface 16a of the hinge member 16 on the side corresponding to the fourth side 11a4 behind the optical surface 11a of the spatial light modulator 11, and the second recess 16h has a front end. The boss portion 14e that protrudes and faces the lower surface 14d of the optical component mounting member 14 described above is faced.

  The base 21 for tilting the hinge member 16 about the second rotation shaft 22 orthogonal to the first rotation shaft 17 has both an upper surface 21a and a lower surface 21b formed flat. On the upper surface 21 a of the base 21, a pair of left and right second hinge portions 21 c and 21 d are directed upward on the side corresponding to the left and right first and second sides 11 a 1 and 11 a 2 of the optical surface 11 a of the spatial light modulator 11. Protrusions are formed.

  The second hinge portions 21c and 21d of the base 21 are parallel to the left and right first and second sides 11a1 and 11a2 of the optical surface 11a of the spatial light modulator 11, and at positions near the rear fourth side 11a4. They are opposed to each other with an outer interval K6 between the outer sides (only shown in FIG. 2).

  The second hinge shafts 21c and 21d of the base 21 are provided with second rotation shafts 22 (22A and 22B) parallel to the third and fourth sides 11a3 and 11a4 before and after the optical surface 11a of the spatial light modulator 11. Shaft holes 21c1, 21d1 (only shown in FIG. 2) to be fitted are respectively formed through.

  Then, the support pieces 16e and 16f of the hinge member 16 are straddled from the upper side between the second hinge portions 21c and 21d of the base 21 to the left of the support piece 16e on the left side of the hinge member 16 and the left side of the base 21. The second rotary shaft 22A (22) is pivotally supported through the second compression spring 23 between the second hinge portion 21c and the second rotary shaft 22A is prevented from coming off by the E washer 24. ing.

  Further, a short second rotating shaft 22B (22) is pivotally supported on the right support piece 16f of the hinge member 16 and the second hinge portion 21d on the right side of the base 21, and the second is supported by the E washer 25. The rotation shaft 22B is prevented from coming off.

  At this time, thrust play with respect to the hinge member 16 is prevented by pushing the support piece 16 e side of the hinge member 16 leftward by the second compression spring 23.

  In addition, on the axis line of the second rotating shaft 22 described above, in order to make the tilt adjusting device 10 compact, the point at which the boss portion 14e formed to protrude from the lower surface 14d of the optical component mounting member 14 intersects the base 21. Since the second rotating shaft 22 cannot be formed long because it is provided between the second hinge portions 21c and 21d, the second rotating shaft 22 is made short and the second rotating shaft 22A is short. 22B.

  Further, a second spring hook for hooking a second biasing member 28 to be described later on the front side corresponding to the third side 11a3 in front of the optical surface 11a of the spatial light modulator 11 on the upper surface 21a of the base 21. A stop plate 26 is attached.

  Furthermore, the base 21 is formed with an escape hole 21e through which the flexible substrate 12 connected to the spatial light modulator 11 passes.

  The first biasing member 27 that biases the optical component mounting member 14 toward the hinge member 16 uses a tension spring. The first urging member (hereinafter referred to as a first tension spring) 27 has its one end portion 27a hooked to a first spring latching plate 15 attached in front of the lower surface 14d of the optical component mounting member 14. Yes. Further, the first tension spring 27 is hooked on the first bent piece 20a of the spring latching bracket 20 having the other end portion 27b attached to the front center portion on the upper surface 16a of the hinge member 16.

  By this first tension spring 27, the optical component mounting member 14 on which the spatial light modulator 11 is mounted is biased so as to tilt toward the lower hinge member 16 with the first rotation shaft 17 as the center. .

  The second biasing member 28 that biases the hinge member 16 toward the base 21 also uses a tension spring. The second urging member (hereinafter referred to as a second tension spring) 28 has a second bent piece 20b of the spring latching bracket 20 in which the one end portion 28a is attached to the front center portion on the upper surface 16a of the hinge member 16. It is hanging on. Further, the second tension spring 28 is hooked to the second spring latching plate 26 attached to the front side on the upper surface 21a of the base 21 at the other end 28b.

  By this second tension spring 28, the hinge member 16 is biased so as to tilt toward the lower base 21 around the second rotation shaft 22 (22A, 22B).

  The first tilt adjustment member 29 that adjusts the tilt around the first rotation axis of the optical component mounting member 14 on which the spatial light modulation element 11 is mounted is a screw as an example of a member that is supported by the base 21 and moves forward and backward. However, the present invention is not limited to this and may be a rod-shaped member.

  The first tilt adjustment member (hereinafter referred to as a first screw) 29 is installed on the base 21 at a position corresponding to the substantially central portion of the fourth side 11a4 behind the optical surface 11a of the spatial light modulator 11. ing. The first screw 29 has a male screw portion 29b screwed into a female screw portion cylindrical body 29a fixed to the base 21 by press fitting or the like, and a steel ball 29c is fitted to one end portion (tip portion) of the male screw portion 29b. Is installed.

  Then, when the male screw portion 29b of the first screw 29 is rotated forward or reverse from the lower surface 21b side of the base 21, the male screw portion 29b of the first screw 29 linearly advances and retreats in the vertical direction. Thus, the steel ball 29c mounted on one end of the male screw portion 29b is brought into contact with the lower end portion of the boss portion 14e formed to protrude from the lower surface 14d of the optical component mounting member 14.

  At this time, as shown in FIGS. 4A to 4C, the boss portion 14e formed to protrude from the lower surface 14d of the optical component mounting member 14 is a steel mounted on one end portion of the male screw portion 29b of the first screw 29. It is a receiving part with which the ball 29c abuts.

  The steel ball 29c mounted on one end of the male screw portion 29b of the first screw 29 is brought into contact with the boss portion 14e formed to protrude from the lower surface 14d of the optical component mounting member 14 in three ways.

  That is, in the first aspect shown in FIG. 4A, the lower end portion of the boss portion 14e of the optical component mounting member 14 is formed on the flat surface 14e1. Moreover, in the 2nd aspect shown in FIG.4 (b), the lower end site | part of the boss | hub part 14e is formed in the conical surface 14e2 dented conically. Furthermore, in the 3rd aspect shown in FIG.4 (c), the lower end part of the boss | hub part 14e is formed in the hemispherical surface 14e3 dented in a hemispherical shape. Any one of the first to third aspects may be applied. However, the third mode shown in FIG. 4C is desirable.

  In the third aspect described above, the steel ball 29c mounted on one end of the male screw portion 29b of the first screw 29, and the hemispherical surface 14e3 in which the lower end portion of the boss portion 14e of the optical component mounting member 14 is recessed in a hemispherical shape, Slid in conformity with each other, it is not necessary to be affected by the rotation of the male screw portion 29b with respect to the hemispherical surface 14e3. Therefore, it is possible to adjust the optical surface 11a (FIG. 1) with high accuracy with respect to the tilt around the first rotation axis.

  Even when any one of the first to third aspects is adopted, when the optical surface 11a of the spatial light modulator 11 is set parallel to the base 21 when the tilt adjusting device 10 is designed, FIG. As shown in b), the design contact point at which one end portion of the male screw portion 29b of the first screw 29 contacts the optical component mounting member 14 is three-dimensionally (vertical direction × (Horizontal direction × depth direction).

  Accordingly, one end portion of the first screw 29 also contacts the boss portion (receiving portion) 14e that protrudes from the optical component mounting member 14 toward one end portion of the first screw (first tilt adjustment member) 29. You will have this contact.

  That is, as shown in FIGS. 4A to 4C, when the tilt adjusting device 10 is designed, it is mounted on the lower end portion of the boss portion 14e of the optical component mounting member 14 on one end portion of the male screw portion 29b of the first screw 29. When the steel ball 29c is brought into contact, the center point O of the steel ball 29c, which is the contact point with the lower end portion of the boss portion 14e, is approximately three-dimensionally aligned with the axis of the second rotating shaft 22. It is set.

  Accordingly, the protruding position of the lower end portion of the boss portion 14e of the optical component mounting member 14 is set in advance so as to contact the contact point at the time of designing the first screw 29.

  The second tilt adjustment member 30 that adjusts the tilt of the hinge member 16 about the second rotation axis also uses a screw as an example of a member that is supported by the base 21 and moves up and down. However, the present invention is not limited to this. Alternatively, it may be a rod-shaped member.

  The second tilt adjustment member (hereinafter referred to as a second screw) 30 is formed on the base 21 on the axis of the first rotation shaft 17 and on the second and third sides 11a2 of the optical surface 11a of the spatial light modulator 11. , 11a3 at a position corresponding to the diagonally right front. Similarly to the first screw 29, the second screw 30 is formed by screwing a male screw portion 30b into a female screw portion cylinder 30a fixed to the base 21 by press fitting or the like, and one end portion of the male screw portion 30b. Are mounted with steel balls 30c.

  When the male screw part 30b of the second screw 30 is rotated forward or reverse from the lower surface 21b side of the base 21, the male screw part 30b of the second screw 30 linearly advances and retreats in the vertical direction. A steel ball 30c mounted on one end of 30b is brought into contact with the lower surface 16b of the hinge member 16.

  At this time, as will be described later, when the rotary operation of the first and second screws 29 and 30 is remotely operated by the flexible shaft 63 (FIGS. 7 and 8), the strength of the waist of the flexible shaft 63 is not lost. Thus, in order to maintain the mounting strength of the first and second screws 29 and 30, both the female threaded cylinders 29a and 30a of the first and second screws 29 and 30 are firmly supported on the base 21. Therefore, the first and second tilt adjustment members can be reliably advanced and retreated in the vertical direction without applying unnecessary loads other than in the vertical direction, and the optical operation of the optical surface 11a of the spatial light modulator 11 can be performed remotely.

  In addition, there is a method in which the female screw portion is directly formed on the base for the first and second screws 29 and 30. However, in this embodiment, since the screwing accuracy and pitch of the screw affect the adjustment function, a commercially available product in which the female threaded cylinders 29a and 30a and the male threaded parts 29b and 30b are specially formed. It is better to use For example, when the diameters of the male screw portions 29b and 30b are 4 mm, the screw pitch can be set to 0.25 mm narrower than the JIS standard and the screwing length can be increased, so that the first and second screws 29 and 30 can be rotated. It can be performed accurately and accurately.

  When adjusting the inclination of the optical surface 11a of the spatial light modulator 11 in the tilt adjusting device 10 according to the embodiment of the present invention configured as described above, the user does not show the image information displayed on the optical surface 11a. The first and second screws 29 and 30 are rotated from the lower surface 21b side of the base 21 in the tilt adjusting device 10 while being viewed on the display.

  Here, the tilt adjusting device 10 has a two-layer structure in which the tilt adjustment mechanism portion of the spatial light modulator 11 toward the optical surface 11a is divided into an upper layer around the first rotation axis and a lower layer around the second rotation axis. It is assembled to. Therefore, the adjustment of the tilt of the spatial light modulator 11 toward the optical surface 11a is performed by repeatedly adjusting the lower layer and the upper layer little by little, and finally adjusting the tilt adjustment mechanism of the upper layer close to the spatial light modulator 11. Therefore, the tilt adjustment to the optical surface 11a is the best.

  First, as shown in FIGS. 3A and 3B, when adjusting the tilt adjustment mechanism of the lower layer, a hinge member 16 supporting the optical component mounting member 14 is provided in the vicinity of the fourth side 11a4 of the optical surface 11a. The second rotation shaft 22 is rotated around the center.

  At this time, the male screw portion 30b of the second screw 30 passes through the axis of the first rotation shaft 17 on the lower surface 16b of the hinge member 16 and is obliquely forward to the right of the second and third sides 11a2 and 11a3 of the optical surface 11a. The one end side is brought into contact, and the second screw 30 is linearly advanced and retracted in the vertical direction. As a result, the optical surface 11a of the spatial light modulator 11 follows the urging force of the second tension spring 28 installed on the front side of the third side 11a3 of the optical surface 11a according to the advance / retreat amount of the second screw 30. 2 Tilt about the pivot shaft 22.

  On the other hand, as shown in FIG. 3A, when adjusting the tilt adjustment mechanism of the upper layer, the optical component mounting member 14 on which the spatial light modulator 11 is mounted is connected to the second side of the optical surface 11 a of the spatial light modulator 11. It is rotated around the first rotating shaft 17 that is biased outward from 11a2.

  At this time, one end portion side of the male screw portion 29b of the first screw 29 is placed on the lower end portion of the boss portion 14e that protrudes from the lower surface 14d side of the optical component mounting member 14 to the substantially intermediate portion of the fourth side 11a4 of the optical surface 11a. The first screw 29 is linearly advanced and retracted in the vertical direction by abutting. Thereby, the optical surface 11a of the spatial light modulator 11 follows the urging force of the first tension spring 27 installed in front of the first and third sides 11a1 and 11a3 of the optical surface 11a. In response to this, the first tilting shaft 17 is tilted.

  As described above, when the optical surface 11a of the spatial light modulator 11 is set parallel to the base 21 at the time of designing, one end portion side of the male screw portion 29b of the first screw 29 contacts the optical component mounting member 14. The design contact point that comes into contact with the axis of the second rotation shaft 22 is substantially matched three-dimensionally.

  Thus, even if the optical surface 11a of the spatial light modulator 11 is tilted about the second rotation shaft 22 via the lower hinge member 16, the boss portion 14e of the upper optical component mounting member 14 is the second. It substantially coincides with the axis of the rotation shaft 22. Accordingly, since the optical component mounting member 14 on which the spatial light modulator 11 is mounted does not move, the tilt angle of the optical surface 11a is not displaced with respect to the tilt around the first rotation axis.

  Further, the boss portion 14e of the optical component mounting member 14 is adjusted by adjustment for absorbing the influence of variation due to assembly, such as the manufacturing accuracy of the component, the attachment of the spatial light modulation element 11, or the adjustment adjusted to the optical system. Even in the case of being adjusted to a position deviated from the axis of the second rotation shaft 22, in order to perform tilt adjustment with respect to the optical surface 11a of the spatial light modulator 11 as will be described later, By tilting the lower surface 16b of the hinge member 16 with the steel ball 30c mounted on one end of the screw portion 30b, the tilt of the first rotation shaft 17 due to the tilt about the second rotation shaft 22 is minimized. Can do.

  On the other hand, even if the optical surface 11a of the spatial light modulator 11 is tilted about the first rotation shaft 17 via the upper optical component mounting member 14, the optical surface 11a is tilted around the second rotation shaft. In contrast, the tilt angle is not displaced.

  Therefore, it is possible to accurately adjust the tilt angles around the first and second rotation axes with respect to the optical surface 11a of the spatial light modulator 11, and to maintain this state.

  Further, the optical surface 11a of the spatial light modulator 11 can be tilted and adjusted separately from each other about the first and second rotation axes orthogonal to each other. Therefore, when the optical surface 11a of the spatial light modulator 11 is tilted in the biaxial directions orthogonal to each other, the tilt angle of the optical surface 11a of the spatial light modulator 11 can be adjusted with high accuracy. Further, since the tilt adjustment points can be reduced with respect to the optical surface 11a as compared with the conventional example, and the rotational deviation about the optical axis of the optical surface 11a does not occur, the tilt adjustment device 10 with high reliability can be provided.

  Next, a description will be given, using FIG. 5, of a modified tilt adjusting apparatus obtained by partially deforming the tilt adjusting apparatus 10 according to the embodiment of the present invention.

  FIG. 5 is a perspective view of a tilt adjusting device of a modified example obtained by partially deforming the tilt adjusting device of the embodiment as viewed from the rear side.

  In the tilt adjusting device 10H of the modified example shown in FIG. 5, only the structure of the base 21H is different from the tilt adjusting device 10 of the embodiment described with reference to FIGS. 1 (a), 1 (b) and 2 above. They are only partially different. The same constituent members shown above are given the same reference numerals for illustration only, and different constituent members from those of the embodiment are given new reference numerals and different points will be described.

  The base 21H in the tilt adjustment device 10H of the modified example includes a flat plate 21H1 and a hinge member 21H2 having second hinge portions 21c and 21d, and the hinge member 21H2 is integrally fixed to the upper surface 21a of the flat plate 21H1. .

  Therefore, the above-described base 21H has the same function as the base 21 (FIG. 1) in the first embodiment. However, the base 21H is processed by separating it into a flat plate 21H1 and a hinge member 21H2, and after processing Workability is better when the base 21H is manufactured by combining the flat plate 21H1 and the hinge member 21H2.

  From the above, in the tilt adjusting device 10H of this modified example, the first hinge member 16 having the first hinge portions 16c and 16d and the second hinge member 21H2 having the second hinge portions 21c and 21d are in two upper and lower layers. It becomes the structure laminated | stacked on.

  As will be described later, the spatial light modulation device 50 (FIG. 6) is configured by applying the tilt adjustment device 10 of the embodiment or the tilt adjustment device 10H of the modification and arranging a plurality of tilt adjustment devices 10 or 10H in a matrix. In this case, the workability of the base 21H becomes better when the plurality of hinge members 21H2 are integrally fixed on the single flat plate 21H1 using the technical idea of the tilt adjusting device 10H of the modified example.

  In the tilt adjusting device 10 of the embodiment described in detail above or the tilt adjusting device 10H of the modified example, the case where the spatial light modulation element 11 or the imaging element (not shown) is used as the optical component has been described. In addition, as an optical component, a light emitting element or a light receiving element used for an optical pickup or the like, various mirrors, optical filters, prisms, or the like may be employed.

  Further, in the tilt adjusting device 10 of the embodiment or the tilt adjusting device 10H of the modified example, when the optical surface 11a of the spatial light modulation element (optical component) 11 is tilted in the biaxial direction, the first and second rotating shafts Although the case where 17 and 22 are mutually orthogonally demonstrated was demonstrated, it is not restricted to this, The 2nd rotation which set the optical surface 11a to the angle from which the 1st rotation axis | shaft 17 and the 1st rotation axis | shaft 17 differed The shaft 22 may be tilted in the biaxial direction.

  Here, a spatial light modulation device will be described with reference to FIGS. 6 to 8 as an example to which the tilt adjusting device 10 of the embodiment or the tilt adjusting device 10 of the modified example is applied.

  FIG. 6 is a perspective view of a spatial light modulator to which the tilt adjusting device according to the present invention is applied. FIGS. 7 and 8 show a remote control unit for remotely operating a plurality of tilt adjusting devices installed in the spatial light modulator.

  As shown in FIG. 6, in the spatial light modulation device 50, a front panel 53 is attached substantially vertically to a front surface 52 a of a box-shaped bracket 52 installed on a bottom plate 51.

  In addition, on the front surface 53a of the front panel 53 described above, a plurality of tilt adjustment devices 10 of the embodiment on which the spatial light modulation element (optical component) 11 is mounted or a plurality of tilt control devices 10H of the modified examples are arranged in a matrix.

  At this time, when the tilt adjustment device 10 of the embodiment is applied, the front panel 53 has a plurality of second hinge portions (not shown) in the same manner as the base 21 (FIG. 1) in the tilt adjustment device 10 of the embodiment. Or a structure in which a plurality of the bases 21 in the tilt adjusting device 10 of the embodiment are mounted on the front panel 53.

  On the other hand, when the tilt adjustment device 10H of the modified example is applied, the front panel 53 is similar to the flat plate 21H (FIG. 5) constituting a part of the base 21H in the tilt adjustment device 10H of the modified example. The panel 53 has a structure in which a plurality of hinge members 21H2 (FIG. 5) constituting the other part of the base 21H in the tilt adjustment device 10H of the modified example are attached.

  In the spatial light modulator 50, the reflective spatial light modulators 11 formed using LCOS that displays information two-dimensionally are arranged in a matrix, for example, in 4 rows × 4 columns (or 3 rows × 3 columns). Has been.

  Then, by irradiating light corresponding to the image information from the outside onto the optical surface 11a of each spatial light modulator 11, the image information reflected and output by the optical surface 11a is projected by a projection lens (not shown). The high-precision electronic holographic image can be displayed three-dimensionally.

  In addition, when combining each image information displayed on the optical surface 11a (FIG. 1) of each of the plurality of spatial light modulators 11, the light information from the light shielding plate 13 (FIG. 1) covering the outside of the optical surface 11a is combined. The information on the gap between the adjacent spatial light modulation elements 11 is optically removed and combined.

  Therefore, in the spatial light modulation device 50, since each spatial light modulation element 11 is mounted on each tilt adjustment device 10 or 10 H, the optical surface 11 a of each spatial light modulation element 11 is centered on the first rotation shaft 17. Thus, it can be tilted in the pan direction (the horizontal direction of the image). Further, in the spatial light modulator 50, the optical surface 11a can be tilted in the tilt direction (vertical direction of the image) about the second rotation shaft 22. However, tilt adjustment cannot be performed from the optical surface 11 a side of each spatial light modulator 11.

  Therefore, in this spatial light modulation device 50, an operation panel 61 constituting a part of the remote control unit 60 for remotely operating the tilt adjusting device 10 or 10H is attached on the upper surface 52b of the bracket 52. The unit 60 will be described later.

  In addition, on the bottom plate 51, behind the bracket 52, a plurality of control units 70 that are unitized for each arrangement row of the spatial light modulation elements 11 are installed. Each control unit 70 has a circuit component 72 mounted in a frame 71, and each control unit 70 is cooled by a plurality of fans 73 mounted above the frame 71.

  Next, as shown in FIGS. 7 and 8, the remote operation unit 60 described above is a front panel 53 corresponding to the base 21 in the tilt adjusting device 10 of the embodiment or the flat plate 21H in the tilt adjusting device 10H of the modified example. A flexible shaft 63 connects the first screw 29 or the second screw 30 supported on the operation panel 62 and the operation knob 62 attached to the upper surface 61 a of the operation panel 61.

  At this time, the first screw 29 that contacts the optical component mounting member 14 (FIG. 1) and the second screw 30 that contacts the hinge member 16 (FIG. 1) are both supported on the front panel 53 side. Thus, the waist strength of the flexible shaft 63 can be withstood. Therefore, even if the tilt adjustment of the spatial light modulator 11 is remotely operated, no trouble occurs.

  Specifically, the other end portion of the male screw portion 29b or 30b of the first or second screw 29 or 30 protruding to the back surface 53b side of the front panel 53 and the operation knob 62 protruding to the back surface 61b side of the operation panel 61. The shaft portion 62 a is fastened by couplings 64 and 65 attached to both ends of the flexible shaft 63.

  At this time, a flexible shaft 63 having a function of transmitting rotation to an axis not on the same axis is applied. The flexible shaft 63 has a function as a flexible rotating shaft, and can transmit the rotation given to one end to the other end in a bent state instead of a straight line. In addition, the flexible shaft 63 has a plurality of layers in which steel wires are wound around the core wire, and the overlapped layers of the steel wires are wound around opposite sides, so that it can correspond to both the left and right rotation directions.

  When the remote operation unit 60 is configured as described above, the user rotates the operation knobs 62 corresponding to the first and second screws 29 and 30 in the normal direction or the reverse direction, and the first and the second via the flexible shafts 63. When the male screw portions 29b, 30b of the second screws 29, 30 are rotated, the male screw portions 29b, 30b screwed into the female screw portion cylinders 29a, 30a advance and retract linearly, respectively. Therefore, the tilt adjustment of the optical surface 11a of the spatial light modulator 11 can be remotely operated around the first and second rotation axes orthogonal to each other.

  At this time, when the tilt adjustment device 10 or 10H is arranged on the front panel 53, for example, 4 rows × 4 columns, 16 first and second screws 29 and 30 are provided, respectively, but a total of 32 first screws are provided. It is not necessary to remotely control all of the first and second screws 29 and 30. For example, if the remote control is performed on 4 rows × 2 columns displaying the central portion of the image, a total of 16 flexible shafts 63 may be connected.

  Of course, the flexible shaft 63 may be connected to the first and second screws 29 and 30 even when the tilt adjusting device 10 or 10H is used alone.

10 ... tilt adjustment device 11 ... optical component (spatial light modulator)
DESCRIPTION OF SYMBOLS 11a ... Optical surface, 11a1-11a4 ... 1st-4th edge, 14 ... Optical component mounting member 16 ... Hinge member, 16c, 16d ... Front-rear pair 1st hinge part 17 ... 1st rotating shaft, 21 ... Example 21H, a pair of left and right second hinge portions 21H ... a modified base, 21H1 ... flat plate, 21H2 ... hinge member 22 (22A, 22B) ... second rotating shaft 27 ... first biasing member (First tension spring), 28 ... second biasing member (second tension spring)
29 ... first tilt adjustment member (first screw), 30 ... second tilt adjustment member (second screw)
50 ... Spatial light modulator, 53 ... Front panel, 62 ... Flexible shaft

Claims (4)

An optical component having an optical surface;
An optical component mounting member for positioning and mounting the optical component;
A hinge member having a first hinge portion that rotatably supports the optical component mounting member about a first rotation axis;
A base that is fixedly installed with a second hinge portion that rotatably supports the hinge member about a second rotation axis set at an angle different from the first rotation axis;
A first biasing means that is hooked between the optical component mounting member and the hinge member and biases the optical component mounting member toward the hinge member;
A second biasing means that is hooked between the hinge member and the base, and biases the hinge member toward the base;
Advancing and retreating from the base side toward the optical component mounting member, and abutting one end side against the optical component mounting member by the urging force of the first urging means, through the optical component mounting member A first tilt adjustment member that tilts and adjusts the optical surface of the optical component about the first rotation axis;
Advancing and retreating from the base side toward the hinge member, and abutting one end side against the hinge member by the urging force of the second urging means, through the hinge member and the optical component mounting member A second tilt adjustment member that tilts and adjusts the optical surface of the optical component about the second rotation axis;
Equipped with a,
The optical component mounting member, said one end of said first tilting adjustment member has a receiving portion abuts,
When the optical surface is set parallel to the base, the contact point at which the one end portion of the first tilt adjustment member contacts the receiving portion is made to substantially coincide with the axis of the second rotation shaft. ing
Tilt adjustment device comprising a call. The receiving unit is a boss portion protruding toward from the optical component mounting member on the one end of the first tilting adjustment member,
That the boss portion having a said contact point
Tilt adjustment device according to claim 1, wherein the this. The tilt adjustment apparatus according to claim 1 or 2, wherein the first and second tilt adjustment members are supported by the base. The first and second tilt adjusting members are connected to the other end portions of the first and second tilt adjusting members opposite to the one end portions, respectively. 4. The tilt adjusting device according to claim 3, wherein the first and second tilt adjusting members are remotely operated so as to freely advance and retract.

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