JP2013222106A - Optical element holding device and manufacturing method of optical element holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of securing a light path to an optical element in a wide range with a simple configuration and capable of holding an optical element stably while securing easy attachment/detachment of the optical element; and a manufacturing method of the same.SOLUTION: An optical element holding device includes: a base member 112 having a base surface 112A which abuts on a bottom surface 102 of an optical element 100; a first projection 114 and a second projection 116 which are provided at the base member 112 and which are capable of pinching rising parts 104A, 104B of the optical element 100 in a state where the bottom surface 102 is abutted on the base surface 112A; a first notch 118 and a second notch 120 which are provided at the base member 112 between the first projection 114 and the second projection 116 forming a pair by facing each other via the base surface 112A, and the base surface 112A; and a holding power applying mechanism which applies holding power of the optical element 100 by pressing force that generates in a spring structure provided with a beam part 112C formed by the first notch 118.

Description

  The present invention relates to an optical element holding device and a method for manufacturing the optical element holding device.

  Conventionally, as a mechanism for holding an optical element having one or more planes such as a prism, an optical element holding apparatus as shown in Non-Patent Document 1 has been used. Specifically, the optical element holding device includes a base member on which the optical element is disposed, two shafts erected on the base member, and a holding member passed between the two shafts. I have. The optical element holding device is configured to move the holding member up and down along two shafts and hold the optical element between the holding member and the base member. That is, the optical element is held by the optical element holding device by being gripped by the bottom surface and the top surface. In such an optical element holding device, the optical element can be easily attached and detached, and can be easily replaced even if the optical element is damaged. For this reason, such an optical element holding device is widely used in optical experiments.

Sigma Koki Co., Ltd., general catalog 10 first edition (published April 2012, pages D34 and D35)

  However, in Non-Patent Document 1, two shafts project from the side surface of the optical element, and a holding member is disposed on the upper surface of the optical element. For this reason, it is difficult to arrange a plurality of optical elements close to each other, and a combination of a lens, a reflecting mirror, a prism, and the like for concentrating, diverging, reflecting, and refracting light (hereinafter referred to as “optical system”). It is difficult to construct a compact. At the same time, the optical path entering and exiting the optical element is limited, which may limit the configuration and application of the optical system.

  Accordingly, the present invention has been made to solve the above-mentioned problems, while ensuring easy removal of the optical element, ensuring a wide optical path to the optical element with a compact configuration, and maintaining stable optical elements. It is an object of the present invention to provide an optical element holding device capable of performing the above and a method for manufacturing the optical element holding device.

  The present invention is an optical element holding device for holding an optical element having one or more planes, a base member having a base surface that comes into contact with the plane, and provided on the base member. A plurality of convex portions that can sandwich the rising portion of the optical element in contact with the surface, and at least one of the convex portions that are opposed to each other via the base surface among the plurality of convex portions. Holding that provides a holding force of the optical element by a pressing force generated by a spring structure including a notch provided in the base member between the convex part and the base surface and a beam part formed by the notch. The above-described problems are solved by including a force imparting mechanism.

  In the present invention, the base member is provided with a plurality of convex portions that can sandwich the rising portion from the plane of the optical element. A holding force application mechanism having a spring structure is also provided on the base member. For this reason, in an optical element holding | maintenance apparatus, it can avoid providing parts other than a some convex part so that it may protrude from an optical element. At the same time, the size of the plurality of convex portions can be set such that the rising portions from the first side and the second side of the optical element can be sandwiched. For this reason, the freedom degree of the optical path of an optical element can be made high. Furthermore, it is not necessary to provide a member on the opposite side of the plane of the optical element that contacts the base surface of the base member. For this reason, it is easy to make the arrangement of the optical elements compact. Since the configuration is simpler than in the past, the cost can be reduced, and the number of movable parts is small and the failure probability can be reduced.

  The present invention is a method of manufacturing an optical element holding device that holds an optical element having one or more planes, the step of preparing a rectangular parallelepiped member, and the plane can be brought into contact with the rectangular parallelepiped member Forming a plurality of convex portions that can sandwich the rising portion of the optical element when the flat surface is brought into contact with the base surface; and A step of forming a cut portion in the base member between at least one of the convex portions that are opposed to each other via the base surface and the base surface, and a beam formed by the cut portion And a step of providing the base member with a holding force applying mechanism capable of applying a holding force of the optical element with a pressing force generated by a spring structure including a portion, and a method of manufacturing an optical element holding device, Can also capture .

  According to the present invention, it is possible to secure a wide range of an optical path to the optical element with a compact configuration while ensuring easy removal of the optical element, and it is possible to stably hold the optical element.

It is a whole perspective view showing an example of the optical element holding device of a 1st embodiment of the present invention. It is a side view of the optical element holding | maintenance apparatus of FIG. It is a whole perspective view which shows an example of the optical element holding | maintenance apparatus of 2nd Embodiment of this invention. It is a side view of the optical element holding device of FIG. It is a whole perspective view which shows an example of the optical element holding | maintenance apparatus of 3rd Embodiment of this invention. It is a top view of the optical element holding device of FIG. It is a side view which shows an example of the optical element holding | maintenance apparatus of 4th Embodiment of this invention. It is a side view which shows an example of the optical element holding | maintenance apparatus of 5th Embodiment of this invention. It is a whole perspective view which shows an example of the optical element holding | maintenance apparatus of 6th Embodiment of this invention. FIG. 10 is a side view of the optical element holding device of FIG. 9.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and dimensional ratios and the like are different from actual ones. Accordingly, specific dimensional ratios and the like should be determined in consideration of the following description. It goes without saying that the drawings include portions having different dimensional relationships and ratios.

<First Embodiment>
First, the overall configuration of the first embodiment will be schematically described with reference to FIGS. 1 and 2. The length 100C in the X-axis direction of the optical element 100 used in the present embodiment is the length L between the tip of the first convex portion 114 on the base surface 112A side and the tip of the second convex portion 116 on the base surface 112A side. (FIG. 2 (B), referred to as the distance L between convex portions).

  As shown in FIGS. 1 and 2, the optical element holding device 110 includes a first convex portion 114 and a second convex portion 116 on the base member 112. The base member 112 has a base surface 112 </ b> A that contacts the bottom surface 102 (plane) of the optical element 100. The first convex portion 114 and the second convex portion 116 are provided on the base member 112, and the first side 100A and the second side 100B of the bottom surface 102 of the optical element 100 with the bottom surface 102 in contact with the base surface 112A. The rising portions 104A and 104B from the can be sandwiched. That is, the first convex portion 114 and the second convex portion 116 are opposed to each other via the base surface 112A. A first cut portion 118 and a second cut portion 120 are provided between the first convex portion 114 and the base surface 112A and the base member 112 between the second convex portion 116 and the base surface 112A, respectively. . By the first cut portion 118 and the second cut portion 120, the first convex portion 114 and the second convex portion 116 can be elastically displaced in the X-axis direction, and constitute a spring structure that generates a pressing force. In particular, since the first cut portion 118 is set deep, the holding force application mechanism can have a more elastic spring structure. Therefore, the optical element holding mechanism 110 has a spring structure including the beam portion 112 </ b> C formed by the first cut portion 118 in particular, and holds the optical element 100 with the holding force generated by the pressing force generated by the spring structure. It can be said that a force imparting mechanism is provided. Of course, the 1st notch part does not need to be deeply set like the 2nd notch part. Even in this case, corresponding beam portions (not shown) are formed in the first cut portion and the second cut portion. In addition, the notch part which forms a spring structure should just be provided in the at least one convex part side among the convex parts which make a pair.

  As shown in FIGS. 1 and 2, the first cut portion 118 and the second cut portion 120 are provided adjacent to the first convex portion 114 and the second convex portion 116, respectively. Therefore, even if the base member 112 is formed by cutting or wire processing, and the angle between the first and second convex portions 114 and 116 and the base surface 112A is not right-angle processed, the apex angle is angular. The optical element 100 that is (right angle) can be securely held in close contact with the first and second convex portions 114 and 116 and the base surface 112A without being damaged.

  The optical element 100 has a substantially rectangular parallelepiped shape such as a prism as shown in FIG. 1, but the optical element 100 may be a beam splitter (BS), a filter, a mirror, or the like. In any case, light (indicated by white arrows shown in FIGS. 1 and 2A) can enter and exit from the side surface 104.

  Hereinafter, each component will be described in detail.

  As shown in FIG. 1, a first protrusion 114 and a second protrusion 116 are provided at both ends of the base surface 112 </ b> A of the base member 112. Therefore, the first convex portion 114 and the second convex portion 116 can sandwich the rising portions 104A and 104B from the first side 100A and the second side 100B of the optical element 100 (that is, the first convex portion 114). The height of the second convex portion 116 from the base surface 112A in the Z-axis direction is shortened to such an extent that the optical element 100 can be sandwiched. The rising portions 104A and 104B of the optical element 100 are regions near the first side 100A and the second side 100B shown in FIG. 2A, respectively, and the base surfaces 112A of the first convex portion 114 and the second convex portion 116 are used. The height in the Z-axis direction from is equal to that. Here, a circle whose diameter is 90% of the length of one side of the side surface 104 of the optical element 100 is assumed with reference to the center position of the side surface 104 of the optical element 100, and the inside of the circle is defined as the effective range of the optical element 100. Assuming that the regions of the rising portions 104A and 104B do not affect the effective range, for example. The base member 112 is provided with a female screw hole 112D that can be screwed with a rod (not shown) such as a screw in the lower surface direction, and an optical surface plate or the like for an optical experiment via the rod (see FIG. The base member 112 can be fixed on the not shown). The base member 112 may be made of a metal such as aluminum, stainless steel, or iron, but may be a resin or ceramic.

  As shown in FIGS. 1 and 2, a first cut portion 118 (cut portion) is provided between the first convex portion 114 and the adjacent base surface 112A (between the first convex portion 114 and the base surface 112A). It has been. The first cut portion 118 is provided along the side surface 112B of the base member 112 on the first convex portion 114 side with a substantially constant width W to the end portion 118A in the depth direction. For this reason, the first cut portion 118 constitutes the base member 112 with an elastically deformable beam portion 112 </ b> C having a first convex portion 114 formed integrally with the tip thereof. It is preferable that the end portion 118A of the first cut portion 118 has a circular shape as shown in FIG. 2B so that the stress concentration does not occur at a specific angle.

  As shown in FIGS. 1 and 2, the side surface 112B of the base member 112 is inclined at an angle θ (X-axis in FIG. 2B) so as to be obliquely upward with respect to the direction orthogonal to the base surface 112A (Z-axis direction). The angle with respect to the direction is displayed). Therefore, the first cut portion 118 along the side surface 112B is also inclined at the same angle θ, and the beam portion 112C formed by the first cut portion 118 is also inclined at the same angle θ. When the optical element 100 is disposed, the inclination angle of the beam portion 112C changes from θ to θ1, but as shown in FIG. 2B, the angle θ1 is less than 90 degrees. That is, the beam portion 112 </ b> C is formed so that at least the first convex portion 114 obtains a reaction force from the base surface 112 </ b> A via the optical element 100 when the optical element 100 is held. That is, the angle θ smaller than the angle θ1 is set within a range of angles having a pressing force Fz (FIG. 2B) that presses the optical element 100 toward the base surface 112A when the optical element 100 is held. Therefore, it is desirable to set the angle θ of the first cut portion 118 to be less than 90 degrees at the maximum.

  As shown in FIGS. 1 and 2, when the optical element 100 is installed in the optical element holding device 110, a force is applied from the optical element 100 to the beam portion 112 </ b> C via the first convex portion 114. For this reason, since the pressing force is applied from the first convex portion 114 to the optical element 100, the beam portion 112C bends and the width W of the first cut portion 118 increases as shown by the broken line in FIG. Accordingly, the first convex portion 114 is displaced to the opposite side of the second convex portion 116. As described above, the spring 112 is formed by the elastic deformation of the beam portion 112 </ b> C formed by the first cut portion 118. In the present embodiment, a mechanism having this configuration is referred to as a holding force applying mechanism.

  As shown in FIGS. 1 and 2A, a second cut portion 120 is provided between the second convex portion 116 and the adjacent base surface 112A. Even in the second cut portion 120, a beam portion (not shown) is formed to a small extent, and the above-described holding force application mechanism is configured. At the same time, the second notch 120 avoids damage to the apex angle that constitutes the second side 100B of the optical element 100 when the optical element 100 is placed on the base 112, and the rising portion 104B of the optical element 100 has the second rising edge 104B. The side surface and the surface of the convex portion 116 are provided so that the bottom surface 102 of the optical element and the base surface 112A are in contact with each other.

  Next, a method for manufacturing the optical element holding device 110 will be described below with reference to FIGS.

  First, a rectangular parallelepiped member is prepared. Next, the base member 112 having the base surface 112A with which the bottom surface 102 of the optical element 100 can abut is formed on the rectangular parallelepiped member, and the optical element 100 is optically contacted when the bottom surface 102 of the optical element 100 is in contact with the base surface 112A. First convex portions 114 and second convex portions 116 that can sandwich rising portions 104A and 104B from the first side 100A and the second side 100B of the element 100 are formed.

Next, the first cut portion 118 and the second cut portion 120 are formed in the base member 112 between the first convex portion 114 and the base surface 112A and between the second convex portion 116 and the base surface 112A.
Next, in particular, the base member 112 is provided with a holding force applying mechanism that can apply the holding force of the optical element 100 with a pressing force generated by a spring structure including the beam portion 112 </ b> C formed by the first cut portion 118.

  As described above, in the present embodiment, the first convex portion 114 and the second convex portion 116 capable of sandwiching the rising portions 104A and 104B from the first side 100A and the second side 100B of the bottom surface 102 of the optical element 100 are the bases. The member 112 is provided. Further, the holding force application mechanism having a spring structure generated by providing the first cut portion 118 and the second cut portion 120 between the first convex portion 114 and the second convex portion 116 and the base surface 112A is also a base member. 112. For this reason, in the optical element holding device 110, it can avoid providing parts other than the 1st convex part 114 and the 2nd convex part 116 so that it may protrude from the optical element 100. FIG.

  At the same time, the height in the Z-axis direction of the first convex portion 114 and the second convex portion 116 from the base surface 112A can be held between the rising portions 104A and 104B from the first side 100A and the second side 100B of the optical element 100. Can be about. Further, the length of the first convex portion 114 and the second convex portion 116 in the Y-axis direction is within a range that can stably hold the optical element 100 (although different from FIGS. 1 and 2), the optical element 100. Can be set shorter than the length in the Y-axis direction. For this reason, the freedom degree of the optical path of the optical element 100 can be made high.

  At the same time, it is not necessary to provide a member on the opposite side (upper surface side) of the bottom surface 102 of the optical element 100 in contact with the base surface 112A of the base member 112. For this reason, it is easy to make the arrangement of the optical element 100 compact. Furthermore, since the configuration is simpler than before, the cost can be reduced, and the number of movable parts is small, so that the failure probability can be reduced.

  In the present embodiment, the description will be made with reference to FIG. 2B. When the optical element 100 is installed on the optical element holding device 110, the first convex portion 114 is displaced outward in the X-axis direction. At this time, the beam portion 112C bends outward in the X-axis direction from the end portion 118A, and the beam portion 112C is inclined from the position of the solid line to the position of the broken line (angle θ → θ1). Here, as shown in FIG. 2B, the beam portion 112C is inclined with respect to a direction (Z-axis direction) orthogonal to the base surface 112A (the angle θ is less than 90 degrees). For this reason, attention is paid to the front end portion 114A of the first convex portion 114, and the force generated there is defined as the holding force F. Then, since this holding force F is not only the clamping force Fx between the first convex portion 114 and the second convex portion 116, but also the angle θ1 at which the beam portion 112C is inclined is less than 90 degrees, the base surface 112A side The pressing force Fz is included. That is, the optical element holding device 110 does not hold the optical element 100 only by the mere clamping force Fx between the first convex portion 114 and the second convex portion 116, but the optical element 100 is referred to as “the base surface 112A side”. The pressing force Fz is generated. That is, the beam portion 112 </ b> C is formed so that at least the first convex portion 114 obtains a reaction force from the base surface 112 </ b> A via the optical element 100 when the optical element 100 is held. For this reason, in this embodiment, it becomes possible to hold the optical element 100 firmly and stably.

  Moreover, in this embodiment, the 1st convex part 114, the 2nd convex part 116, and the base member 112 are integrally formed. For this reason, since the man-hour for forming the optical element holding | maintenance apparatus 110 can be reduced, cost reduction is possible. At the same time, it is possible to make the optical element holding device 110 small and to have a highly rigid structure.

  Furthermore, in the present embodiment, when the length (optical element width) 100C in the X-axis direction of the optical element 100 is known in advance, the second convex portion 116 contacting the optical element 100 to the center of the optical element 100 is known. The distance is always half of the optical element width 100C. Therefore, the center position of the optical element 100 can be easily estimated by using the position of the second convex portion 116 as a reference. For this reason, compared with the optical element holding device as in Non-Patent Document 1, where it is difficult to clarify the reference line, it is possible to reduce the labor of adjusting the optical axis.

  In other words, according to the present embodiment, a wide optical path to the optical element 100 can be secured with a compact configuration while ensuring easy removal of the optical element 100, and the optical element 100 can be stably held.

  Although the present invention has been described with reference to the first embodiment, the present invention is not limited to the first embodiment. That is, it goes without saying that improvements and design changes can be made without departing from the scope of the present invention.

Second Embodiment
Then, the whole structure of 2nd Embodiment is demonstrated roughly using FIG.3 and FIG.4. In addition, the length 200C in the X-axis direction of the optical element 200 used in the present embodiment may be longer or shorter than the distance L between the protrusions (FIGS. 4B and 4C).

  As shown in FIGS. 3 and 4, the optical element holding device 210 is formed in a base member 212 similar to that of the first embodiment, and in a screw hole 222C provided in the base member 212 facing the beam portion 212C as a holding force applying mechanism. A screw (not shown) to be screwed is further provided. The optical element holding device 210 has a configuration in which a screw is engaged with the beam portion 212C and screwed into the screw hole 222C, whereby the first convex portion 214 is displaced and a pressing force is applied to the optical element 200. Has been. That is, in the present embodiment, the first convex portion 214 and the second convex portion 216 can apply a strong pressing force to the optical element 200 and can increase its holding force by screwing the screw into the screw hole 222C. It is said.

  Hereinafter, each component will be described in detail. In addition, since components other than the holding force application mechanism related to the screw and screw hole 222C are the same as those in the first embodiment, the description other than the holding force application mechanism related to the screw and screw hole 222C will be omitted.

  As shown in FIGS. 3 and 4A, the base member 212 and the beam portion 212C that face each other at the first cut portion 218 are provided with screw holes 222C and screw placement portions 222, respectively. The screw hole 222C is continuous with the screw arrangement portion 222 provided in the beam portion 212C (side surface 212B).

  As shown in FIGS. 3 and 4A, the screw placement portion 222 includes a counterbore portion 222A and a through-hole portion 222B. The counterbore 222A can rotatably accommodate at least a part of a screw head (not shown). The counterbore 222A may not be provided if necessary. The through-hole portion 222B is a portion following the counterbore portion 222A and penetrates from the beam portion 212C to the first cut portion 218. The through hole 222B has a hole diameter through which the head of the screw cannot pass.

  As shown in FIGS. 3 and 4A, the screw hole 222C is a portion that is screwed into a male screw portion (not shown) of the screw, and is provided to continue to the through-hole portion 222B. For this reason, the male screw portion of the screw passes through the beam portion 212C, passes through the first cut portion 218, and the head portion of the screw is accommodated in the counterbore portion 222A, and the male screw portion of the screw enters the screw hole 222C. Screwed together. This screwing causes the beam portion 212C to bend from the end portion 218A.

  If the length 200C in the X-axis direction of the optical element 200 is smaller than the distance L between the convex portions, the first convex portion 214 is displaced toward the second convex portion 216 as shown by the broken line in FIG. (Change from angle θ to θ1). If the length 200C in the X-axis direction of the optical element 200 is equal to or greater than the distance L between the convex portions, the first convex portion 214 is opposite to the second convex portion 216 side when the optical element 200 is disposed. Displacement to the side (solid line in FIG. 4C), the width W of the first cut portion 218 is once expanded. Then, as shown by the broken line in FIG. 4C, the beam portion 212C bends (changes from angle θ to θ1).

  In any case, as shown in FIGS. 4B and 4C, the inclined angle θ1 of the beam portion 212C is less than 90 degrees and is inclined with respect to the Z-axis direction. That is, the beam portion 212C is formed such that at least the first convex portion 214 obtains a reaction force from the base surface 212A via the optical element 200 when the optical element 200 is held and the screw is screwed. . Therefore, it is desirable to set the angle θ of the first cut portion 218 in FIGS. 4B and 4C to 90 degrees or less at the maximum. From the above, in this embodiment, not only the clamping force Fx but also the pressing force Fz can be increased by screwing the screw into the screw hole 222C via the screw placement portion 222, and the holding force of the optical element 200 can be increased. It can be given even larger.

  At the same time, the force when the screw is screwed into the screw hole 222C is transmitted to the first convex portion 214 provided on the base member 212 through a corresponding distance of the beam portion 212C, and becomes the holding force of the optical element 200. . That is, since the pressing force generated by screwing the screw into the screw hole 222C is uniformized and applied as the holding force of the optical element 200, the distortion generated in the optical element 200 can be reduced.

  A holding force applying mechanism including a screw and a screw hole 222 </ b> C is also provided in the base member 212. For this reason, also in the optical element holding device 210 of this embodiment, it can avoid providing parts other than the 1st convex part 214 and the 2nd convex part 216 so that it may protrude from the optical element 200. FIG. Therefore, the holding force application mechanism can be configured simply and compactly, and the holding force applied to the optical element 200 can be generated and controlled with good reproducibility.

  In the present embodiment, the side surface 212B of the base member 212 on the first convex portion 214 side is inclined with respect to a direction (Z-axis direction) orthogonal to the base surface 212A. For this reason, the screwing state of the screw arranged on the side surface 212B can be easily adjusted.

  Although the present invention has been described with reference to the second embodiment, the present invention is not limited to the second embodiment. That is, it goes without saying that improvements and design changes can be made without departing from the scope of the present invention.

<Third Embodiment>
Next, the overall configuration of the third embodiment will be described with reference to FIGS. 5 and 6. The optical element 300 applied to the present embodiment is not a substantially rectangular parallelepiped shape, for example, a plano-convex cylindrical structure in which one surface has a curvature in one direction but does not have a curvature in a direction orthogonal thereto. Such as a lens. As shown in FIGS. 5 and 6, the constituent elements other than the first convex portion 314 are the same as those in the second embodiment, and thus the description other than the first convex portion 314 is omitted.

  As shown in FIGS. 5 and 6, the optical element holding device 310 has the same configuration as that of the second embodiment. However, the first side 300A of the optical element 300 is not a straight line parallel to the Y-axis direction but a curved line. For this reason, the 1st convex part 314 contact | abutted to the standup | rising part from 1st edge | side 300A is comprised from two convex part 314A, 314B. That is, as shown in FIGS. 5 and 6, the first convex portion 314 is configured such that a concave portion 314 </ b> C is provided in the central portion of the first convex portion 214 of the second embodiment. In addition, the code | symbol 324 of FIG. 6 is a screw.

  With such a configuration of the first protrusions 314, the protrusions 314A and 314B can contact the optical element 300 as shown in FIG. For this reason, in the present embodiment, even a plano-convex optical element having a cylindrical surface, which is not substantially rectangular parallelepiped, can be stably held.

  In the present embodiment, the center of the plano-convex optical element having a cylindrical surface is always arranged at the center of the width in the Y-axis direction of the recess 314C, and the center position of the optical element 300 is Estimation is easy. For this reason, compared with the optical element holding device as in Non-Patent Document 1, where it is difficult to clarify the reference line, it is possible to reduce the labor of adjusting the optical axis.

  Of course, in the present embodiment, the optical element is not limited to a plano-convex shape having a cylindrical surface, and may be of a substantially rectangular parallelepiped shape, or can be applied to an optical element having other curved surfaces and curves. .

<Fourth embodiment>
In the fourth embodiment, as shown in FIGS. 7A and 7B, the base member 412 is disposed between the first convex portion 414 and the second convex portion 416 which are opposed to each other via the base surface 412A. It can be separated into multiple blocks. In addition, since components other than the base member 412 between the 1st convex part 414 and the 2nd convex part 416 are the same as that of 1st Embodiment, 2nd Embodiment, or 3rd Embodiment, the 1st convex part 414 and 2nd Explanations other than the base member 412 between the convex portions 416 are omitted.

  As shown in FIG. 7A, the base member 412 is composed of three blocks, a front stage portion 413A, a middle stage portion 413B, and a rear stage portion 413C. When the optical element is thick, the middle portion 413B is combined, and when the optical element is thin, the middle portion 413B is removed. As shown in FIG. 7B, the front portion 413A and the rear portion 413C directly constitute the base member 412. can do. That is, the distance between the first convex part 414 and the second convex part 416 (distance L between convex parts) is changed by changing the number of blocks (front part 413A, middle part 413B, rear part 413C). It is possible. A bolt or the like (not shown) can be used to fix the front stage portion 413A, the middle stage portion 413B, and the rear stage portion 413C.

  That is, in the fourth embodiment, the distance between the first convex portion 414 and the second convex portion 416 can be changed by changing the number of blocks. For this reason, even if it is an optical element from which thickness differs, the optical element can be hold | maintained and it becomes possible to use the optical element holding | maintenance apparatus 410 more versatilely.

<Fifth Embodiment>
In the fifth embodiment, as shown in FIGS. 8A to 8D, the base member 512 includes a recess 521 in the base surface 512A (the base member 512 including the recess 521 is replaced with the main body 513A. Called). And the optical element holding | maintenance apparatus 510 in this embodiment has the square column member 513B (polygonal column member) which can be fitted by the four combinations to the recessed part 521 by changing the direction of the side surface of itself. In addition, since components other than the recessed part 521 and the square pillar member 513B are the same as that of 1st Embodiment, 2nd Embodiment, or 3rd Embodiment, description is abbreviate | omitted except the recessed part 521 and the square pillar member 513B.

  As shown in FIG. 8A, the concave portion 521 is provided between the second convex portion 516 and the base surface 512A. The quadrangular column member 513B has a shape that can be fitted into the recess 521. The quadrangular column member 513B includes protrusions 513BA and 513BB on two surfaces that are the back of each of the four side surfaces. The protrusions 513BA and 513BB are provided so that the positional relationship is different on each side surface. Note that reference numeral 513AA denotes a depression provided on the side surface of the recess 521, and is provided to accommodate the protrusion 513BB as shown in FIG. 8D. In the present embodiment, when the quadrangular column member 513B is fitted into the recess 521, the side surfaces of the quadrangular column member 513B excluding the projections 513BA and 513BB are configured to be flush with the base surface 512A. ing.

  First, as shown in FIG. 8A, when the quadrangular prism member 513B is fitted into the recess 521, the protrusion 513BA becomes one of the protrusions paired with the first protrusion 514. That is, the distance L between the protrusions is determined by the first protrusion 514 and the protrusion 513BA, and the rising portion of the optical element can be held between the first protrusion 514 and the protrusion 513BA.

  Next, when the quadrangular column member 513B in the state of FIG. 8A is rotated 180 degrees around the X axis and the quadrangular column member 513B is fitted into the concave portion 521, as shown in FIG. The first convex portion 514 is a convex portion that is paired with the first convex portion 514. That is, the distance L between the protrusions is determined by the first protrusion 514 and the protrusion 513BB, and the rising portion of the optical element can be held between the first protrusion 514 and the protrusion 513BB.

  Next, when the quadrangular prism member 513B in the state of FIG. 8B is rotated 180 degrees around the Y axis and the quadrangular prism member 513B is fitted into the concave portion 521, as shown in FIG. The first convex portion 514 is a convex portion that is paired with the first convex portion 514. That is, the distance L between the protrusions is determined by the first protrusion 514 and the protrusion 513BA, and the rising portion of the optical element can be held between the first protrusion 514 and the protrusion 513BA.

  When the quadrangular column member 513B in the state of FIG. 8B is rotated 90 degrees counterclockwise around the Y axis and the quadrangular column member 513B is fitted into the recess 521, as shown in FIG. The portion 513BB is housed in the recess 513AA, and the side surface of the quadrangular column member 513B that does not have a protrusion constitutes the same plane as the base surface 512A (that is, the side surface that does not have a protrusion contacts the bottom surface of the optical element). And the 2nd convex part 516 becomes one convex part of the convex part which makes a pair with the 1st convex part 514. That is, the distance L between the convex portions is determined by the first convex portion 514 and the second convex portion 516, and the rising portion of the optical element can be held between the first convex portion 514 and the second convex portion 516. . In this case, by fitting the quadrangular column member 513B into the recess 521, the contact area of the bottom surface of the optical element can be widened, and the optical element can be held more stably. In this case, of course, the quadrangular prism member 513B may not be fitted in the recess 521.

  That is, in the fifth embodiment, the distance L between the convex portions can be changed by changing the direction of the side surface of the quadrangular column member 513B and fitting the quadrangular column member 513B into the concave portion 521. For this reason, even if it is an optical element from which thickness differs, the optical element can be hold | maintained and it becomes possible to use the optical element holding | maintenance apparatus 510 more versatilely.

  In the present embodiment, the quadrangular prism member 513B is fitted in the recess 521, but a polygonal prism member such as a triangular prism member or a pentagonal prism member may be used. And the protrusion part should just be provided in the 1 or more side surface of the polygonal column member.

<Sixth Embodiment>
In the sixth embodiment, as shown in FIGS. 9 and 10, an optical element holding device 610 holds an optical element 600 having a bottom surface 602 (plane) having a square shape. Since the bottom surface 602 of the optical element 600 has a square shape, the optical element 600 includes not only the first side 600A and the second side 600B that are parallel, but also the third side that is parallel in the direction orthogonal to them (Y-axis direction). 600C and a fourth side 600D.

  As shown in FIG. 9, the base member 611 of the optical element holding device 610 is an X-axis base member 612 and a Y-axis base member 613 orthogonal to each other, and the base surfaces 612A and 613A constitute the same plane. . The X-axis base member 612 (Y-axis base member 613) has a first convex portion that can hold the rising portions of the first side 600A and the second side 600B (third side 600C and fourth side 600D) of the optical element 600. 614 and the 2nd convex part 616 (615 and 617) are provided. The rising portion, the first convex portion 614, and the second convex portion 616 (615 and 617) are the same as the relationship shown in FIG. Since the functions of the X-axis base member 612 and the Y-axis base member 613 are the same except that only the holding direction of the optical element 600 is different, only the X-axis base member 612 will be described below, and the Y-axis base member 613 will be described. Description is omitted.

  In the X-axis base member 612, the first convex portion 614 adjacent to the second convex portion 616 side has a base surface 612A (between the first convex portion 614 and the base surface 612A) as shown in FIG. A notch 618 (notch) is provided. The first cut portion 618 has a substantially constant width in the depth direction to the end portion (in FIG. 10, the beam portion 612C is in the state A, but the width of the state A is narrow for convenience of drawing). It is provided along the side surface 612B of the base member 612 on the one convex portion 614 side. For this reason, the first notch 618 results in the X-axis base member 612 having a first convex portion 614 integrally formed at the tip thereof, a beam portion 612C, and the first convex portion via the beam portion 612C. A support portion 612E that supports the portion 614 in a displaceable manner is formed. That is, the X-axis base member 612 includes a support portion 612E that supports the first convex portion 614 provided in the beam portion 612C so as to be displaceable. When the optical element 600 is gripped by the first convex portion 614 and the second convex portion 616, the angle (position) of the beam portion 612C (state A), which was the initial angle θ, is the position of the first convex portion 614. Is displaced outward (moved to the right in FIG. 10) and increased to an angle θ1 (the beam portion 612C is in the state C). For this reason, the support portion 612E generates a restoring force that attempts to return the position of the beam portion 612C that is displaced when the optical element 600 is held. That is, since the support portion 612E also forms a part of the spring structure generated by the first cut portion 618, the above-described restoring force is generated, so that a pressing force is applied to the optical element 600. Even when the position of the beam portion 612C is in the state C, the angle θ1 is less than 90 degrees, the first convex portion 614 is inclined toward the second convex portion 616, and the first convex portion 614. Only the tip 614A of the optical element 600 is in contact with the side surface 604 of the optical element 600. That is, although the support portion 612E has inclined the first convex portion 614 toward the second convex portion 616 from the beginning, the first convex portion 614 is also moved to the second convex portion 616 side when holding the optical element 600. The holding force of the optical element 600 is applied to the first convex portion 614 and the second convex portion 616.

  On the opposite side of the beam portion 612C, an extension portion 612D extends as shown in FIG. That is, the X-axis base member 612 includes an extending portion 612D that extends on the opposite side of the beam portion 612C. For this reason, when a force in the X-axis direction is applied to the extending portion 612D, the amount of displacement of the first convex portion 614 at the tip of the beam portion 612C can be applied in the X-axis direction with the support portion 612E as a fulcrum. That is, the position of the first convex portion 614 can be displaced by the extending portion 612D.

  A base surface 612A adjacent to the first protrusion 614 side of the second protrusion 616 is provided with a second notch 620 (notch) having the same shape as the first notch 618, as shown in FIG. . That is, as a result of the second insertion portion 620, the base member 612 has a beam portion 612C including a second convex portion 616 integrally formed at the tip thereof, and a support portion that supports the beam portion 612C in a displaceable manner. 612E is formed. Then, on the opposite side of the beam portion 612C, an extending portion 612D extends as shown in FIG. The functions of these members have the functions described above.

  As described above, in the sixth embodiment, the X-axis base member 612 and the Y-axis base member 613 are extended portions 612D and 613D extending to the opposite side of the beam portions 612C and 613C, and the beam portions 612C and 613C. The first convex portions 614 and 615 and the second convex portions 616 and 617 provided in the above are supported by the displacement portions 612E and 613E. And the restoring force which tries to return the position of the 1st convex part 614,615 and the 2nd convex part 616,617 which the support parts 612E and 613E were displaced by extension part 612D, 613D to the original is generated. A pressing force is applied to the optical element 600. That is, it is not necessary to provide a holding force application mechanism separately from the X-axis base member 612 and the Y-axis base member 613. For this reason, the optical element holding device 610 can be further reduced in size and cost. At the same time, the optical element 600 can be moved correspondingly in the XY axis directions on the base surfaces 612A and 613A while being held by the first convex portions 614 and 615 and the second convex portions 616 and 617 (for example, in FIG. 10). (Because the beam portion 612C shown can be displaced between state A and state B). For this reason, adjustment (centering) of the center position of the optical element 600 can be easily realized.

  Further, the X-axis base member 612 and the Y-axis base member 613 include extending portions 612D and 613D that extend on the opposite side of the beam portions 612C and 613C. Therefore, by displacing the extending portions 612D and 613D, the support portions 612E and 613E serve as fulcrums, and the beam portions 612C and 613C can be easily displaced from the state A to the state C in FIG. For this reason, the contact condition when the first convex portions 614 and 615 and the second convex portions 616 and 617 come into contact with the optical element 600 can be easily adjusted, the impact applied to the optical element 600 is reduced, and the optical element 600 is held. Can be realized more easily and stably.

  The optical element 600 includes a third side 600C and a fourth side 600D that are further parallel to the bottom surface 602. The base member 611 further includes a first convex portion 615 and a second convex portion 617 that can sandwich the rising portions from the third side 600C and the fourth side 600D (by the Y-axis base member 613). And the holding force provision mechanism (support part 613E) is further provided corresponding to the 3rd side 600C and the 4th side 600D. Further, the support portions 612E and 613E are provided corresponding to the sides 600A, 600B, 600C, and 600D (that is, at four locations). For this reason, the optical element holding device 610 can hold the optical element 600 from the four sides of the optical element 600, so that the optical element 600 can be held more firmly and stably.

  In the sixth embodiment, the holding force application mechanisms are provided as support portions and provided at four locations, but the present invention is not limited to this. For example, the holding force application mechanisms shown in the second embodiment may be provided in all four places, or may be used in only a part. Moreover, you may employ | adopt the 2nd notch part 120 shown in 1st Embodiment with each of an X-axis and a Y-axis base member.

  The present invention can be widely used to hold optical elements of various shapes such as prisms having one or more planes, beam splitters (BS), filters, mirrors, and cylindrical lenses.

100, 200, 300, 600 ... optical element 102, 202, 302, 602 ... bottom face of optical element 104, 304, 604 ... side face of optical element 110, 210, 310, 410, 510, 610 ... optical element holding device 112, 212, 312, 412, 512, 611 ... Base member 112A, 212A, 312A, 412A, 512A, 612A, 613A ... Base surface 112C, 212C, 312C, 412C, 512C, 612C, 613C ... Beam part 114, 214, 314, 414, 514, 614, 615 ... 1st convex part 116, 216, 316, 416, 516, 616, 617 ... 2nd convex part 118, 218, 318, 418, 518, 618, 619 ... 1st cut part 120, 220, 320, 420, 520, 620, 621 ... 2nd cut Insertion part 222, 322 ... Screw arrangement part 222C, 322C ... Screw hole 324, 524 ... Screw 513B ... Square pillar member 513BA, 513BB ... Projection part 521 ... Recess 612D, 613D ... Extension part 612E, 613E ... Support part

Claims (8)

An optical element holding device for holding an optical element having one or more planes,
A base member having a base surface in contact with the plane;
A plurality of convex portions provided on the base member and capable of sandwiching a rising portion of the optical element in a state where the flat surface is in contact with the base surface;
A notch provided in the base member between the base surface and at least one of the plurality of convex portions facing each other via the base surface and making a pair; and
A holding force applying mechanism for applying a holding force of the optical element by a pressing force generated by a spring structure provided with a beam portion formed by the cut portion;
An optical element holding device comprising: The beam portion is formed such that when the optical element is held, at least one of the pair of convex portions obtains a reaction force from the base surface via the optical element. The optical element holding device according to claim 1. The holding force applying mechanism further includes a screw that is screwed into a screw hole provided in the base member facing the beam portion,
The optical element according to claim 1 or 2, wherein the screw is engaged with the beam portion and screwed into the screw hole, whereby the convex portion is displaced and the pressing force is applied. Holding device. The optical element holding device according to any one of claims 1 to 3, wherein the plurality of convex portions and the base member are integrally formed. The base member is separable into a plurality of blocks between the convex portions that are opposed to each other via the base surface, and the number of the blocks is changed to change the distance between the convex portions that form the pair. The optical element holding device according to any one of claims 1 to 3, wherein the distance is changeable. The base member has a concave portion in the base surface, and has a polygonal column member that can be fitted in the concave portion by one or more combinations by changing the direction of the side surface of the base member,
4. The projection according to claim 1, wherein one or more protrusions provided on one or more of the side surfaces of the polygonal column member are one protrusion of the pair of protrusions. 5. Optical element holding device. The base member includes an extending portion that extends to the opposite side of the beam portion, and a support portion that supports the convex portion provided in the beam portion so as to be displaceable.
5. The pressing force is applied by generating a restoring force that causes the support portion to return the position of the convex portion displaced by the extending portion. The optical element holding device according to any one of the above. A method for manufacturing an optical element holding apparatus for holding an optical element having one or more planes,
A step of preparing a rectangular parallelepiped member;
Formed on the rectangular parallelepiped member is a base member having a base surface with which the flat surface can abut, and a convex portion capable of sandwiching the rising portion of the optical element when the flat surface is brought into contact with the base surface. A step of forming a plurality,
A step of forming a notch in the base member between the base surface and at least one of the plurality of convex portions facing each other via the base surface and forming a pair;
Providing the base member with a holding force applying mechanism capable of applying a holding force of the optical element with a pressing force generated by a spring structure provided with a beam portion formed by the cut portion;
The manufacturing method of the optical element holding | maintenance apparatus characterized by including these.

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