JP2540604Y2 - Optical element mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a device for mounting an optical element for refracting or reflecting a laser beam at a predetermined position in a device or the like that performs measurement using a laser beam. In particular, the present invention relates to an optical element mounting device capable of finely adjusting the attitude of an optical element.

[Prior Art] Conventionally, a measuring instrument using a laser beam generally includes an optical element mounting device as shown in FIGS.
The optical element mounting device has a mounting base 1 and a base 3 mounted on the mounting base 1.
The movable part 5 is provided on the upper surface of the base 3. Movable part 5
Denotes two movable plates 5a and 5b parallel to each other at an interval, and two columns 5c supporting these movable plates 5a and 5b to each other.
And A pressing member 7 that can move up and down is attached to a central portion of the upper movable plate 5a. The holding member 7 extends vertically through the upper movable plate 5a. Holding member 7
An optical element (not shown) for bending the laser beam is sandwiched and mechanically fixed between the lower end of the movable plate 5b and the lower movable plate 5b. A knob 7a is provided on the upper part of the holding member 7.

Further, the optical element mounting device further includes two inclination adjusting members 9 and 11 and one rotation adjusting member 13. Assuming that the holding member 7 is in the axial direction, the tilt adjusting members 9 and 11 project radially outward from the cylindrical side surface of the base 3. On the other hand, the rotation adjusting member 13 protrudes from the cylindrical side surface of the base 3 in a direction parallel to a tangent line.

Knobs 9a, 11a, and 13a are provided at tip portions of the inclination adjusting members 9, 11 and the rotation adjusting member 13, respectively. When these knobs 9a, 11a, 13a are rotated, the tilt adjusting members 9, 11 and the rotation adjusting member 13 are rotated, and the movable portion 5 can be tilted and rotated. As a result, the laser beam after bending can be directed to a predetermined position by finely adjusting the attitude and the direction of the optical element.

Further, this optical element mounting device is fixedly installed on an installation table or the like by penetrating screws (not shown) into four screw holes 15 formed in the mounting base portion 1.

[Problem to be Solved by the Invention] However, if two optical element mounting devices are installed adjacent to each other, when the laser light is adjusted to a predetermined position by operating each of the knobs 7a, 9a, 11a, and 13a, the adjacent optical devices are mounted. There is a problem that the fine adjustment is difficult because the element mounting device is in the way.

Furthermore, the inclination adjusting members 9 and 11 and the rotation adjusting member 13
Projecting outward from the cylindrical side surface of the optical element mounting device, the external dimensions of the optical element mounting device become large, and a correspondingly large installation space must be secured.

Therefore, there is a problem that such an optical element mounting device cannot be designed and manufactured compactly.

Therefore, an object of the present invention is to provide an inexpensive optical element mounting device that can easily fine-tune a laser beam, and can be designed and manufactured in a compact manner.

[Means for Solving the Problems] According to the present invention, there is provided an optical element mounting apparatus including a movable part for mounting an optical element and a base on which the movable part is mounted so that the posture can be adjusted. Two spheres that are sandwiched between the base and the base so as to form a gap and are arranged along a predetermined straight line;
The relative distance between the movable portion and the base portion is changed within the range of the gap to perform a seesaw motion on the movable portion to adjust the posture of the movable portion to which the optical element is attached, so that the spherical body is adjusted. Adjusting means provided on each of both sides of the movable section sandwiching the predetermined straight line passing therethrough, and connecting the movable section and the base in the direction of the seesaw movement so as to be relatively movable within the range of the gap. Thus, an optical element mounting device is obtained.

Embodiment FIG. 1 and FIG. 2 show an optical element mounting apparatus according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the optical element mounting apparatus includes a mounting base 21 and a base 23 mounted on a main surface of the mounting base 21. On the upper surface of the base 23, a movable portion 27 for mounting an optical element 26 (a prism is shown in the drawing) such as a prism or a reflection mirror at a predetermined position is mounted. A pair of flanges 23a and 23b extend below the base 23 so as to project in opposite directions. Mounting holes 25a and 25b are formed in these flange portions 23a and 23b, respectively.

An adjustment groove 25c extending from one end of the flange 23a toward one side wall of the base 23 is formed on one flange 23a.

The attachment base 21 and the base 23 are attached to each other by fixing means. As fixing means, the mounting holes 25a of the base 23,
Two screws 31 (only one is shown in the drawing) respectively inserted through 25b are screwed into screw holes 29a, 29b of the mounting base 21 and fastened via spring washers 29. The mounting holes 25a and 25b have a diameter larger than the diameter of the screw 31.

Further, the adjusting groove 25c is for finely adjusting the base 23 in the turning direction by a known eccentric driver (not shown). In order to enable use of the eccentric screwdriver, a reference hole 33 is formed in the mounting base 21 so as to face the adjustment groove 25c. The reference hole 33 serves as a reference for fine adjustment of the rotation of the base 23.

A shaft hole 34 is formed in the center of the bottom surface of the base 23. On the other hand, a shaft hole 37 is also formed in the mounting base portion 21 so as to face the shaft hole 34 of the substrate 23. A mounting shaft 35 is fitted into these shaft holes 34, 37. Thus, the mounting base
The base 21 and the base 23 are rotatably connected to each other by a mounting shaft 35. That is, the base 23 is rotatable around a mounting shaft 35 which is an axis perpendicular to the main surface of the mounting base 21.

The base 23 and the movable part 27 have positioning means for positioning the movable part 27 with respect to the base 23. As a positioning means, as shown in FIG. 3, on the upper surface of the base 23,
Four ball receiving holes 39a for interposing a sphere (fulcrum member) 38,
39b, 39c, and 39d are formed at positions corresponding to the squares of the virtual square along the upper surface of the substrate 23, respectively. The two ball receiving holes 39a and 39b are formed on a first diagonal line on the upper surface of the base 23, and the other two ball receiving holes 39c and 39d are formed on a second diagonal line. As shown in FIG. 4, the movable portion 27 has four ball receiving holes 40a, 40b, 40 as positioning means so as to face the ball receiving holes 39a, 39b, 39c, 39d of the base portion 23 one by one.
c, 40d are formed. A sphere 38 is interposed between the pair of ball receiving holes 39a and 39b on the first diagonal line on the upper surface of the base 23 and the pair of ball receiving holes 40a and 40b of the movable portion 27 facing these. Have been. Also, a sphere 38 is provided between a pair of ball receiving holes 39c and 39d on the second diagonal line on the upper surface of the base 23 and a pair of ball receiving holes 40c and 40d of the movable portion 27 opposed thereto. Can be interposed. That is, the positioning means has a plurality of sets of ball receiving holes 39a to 39d and 40a to 40d at different positions along a predetermined straight line so as to oppose the opposing surfaces of the movable portion 27 and the base 23. The sphere 38 is sandwiched between the movable part 27 and the base 23 so as to form a gap S, and is dimensioned so as to leave a small gap S between the base 23 and the movable part 27 (see FIG. 3). Stipulated.

Therefore, the movable portion 27 and the base portion 23 change the relative distance between them within the range of the gap S. The movable portion 27 is movable in a seesaw motion (swinging) with respect to the base portion 23 with the sphere 38 as a fulcrum. It is.

An L-shaped positioning plate 41 for positioning the optical element 26 is provided on the upper surface of the movable portion 27. Two mounting holes 43 and 44 formed near both ends of the positioning plate 41
The positioning plate 41 is fixed to the movable part 27 by screws 47 and 48 screwed into the movable member 27, respectively, and pins 51 and 53 inserted into holes in other portions. The pins 51 and 53 are used for attaching the positioning plate 41 to a predetermined position. That is, the shape of the movable portion 27 is formed by performing cutting on the outer shape portion. However, when mass-producing the movable parts 27, if the number of lots increases, there may be a slight error in the outer dimensions of each movable part 27. Further, when the mounting holes 43 and 44 are formed in the movable portion 27 having an error, and the positioning plate 41 is mounted on the movable portion 27 with only the screws 47 and 48, a displacement occurs. That is, the ball receiving hole 40a has an error of the outer dimension of the movable portion 27.
Deviation occurs from the center of the position corresponding to the square of the virtual square of ~ 40d. As a result, the center of the optical element 26 fixed to the positioning plate 41 is also shifted.

To correct such dimensional errors, the ball receiving hole
A predetermined dimension is determined in the X-axis-Y-axis direction from the center of the position corresponding to the square of the virtual square of 40a to 40d. Further, when pin holes (not shown) for inserting the pins 51 and 53 into the positions of these predetermined dimensions are formed in the movable portion 27, the positioning plate 41 can always be mounted at the same position.

The base 23 and the movable unit 27 are provided with adjusting means for adjusting the posture of the movable unit 27 with respect to the base 23 in the direction of the seesaw movement. The adjusting means changes the relative distance between the movable part 27 and the base part 23 within the range of the gap to cause the movable part 27 to perform a seesaw motion and adjust the posture of the movable part 27 to which the optical element 26 is attached. It is located on each side of the movable part 27 across a predetermined straight line passing through each of the pair of spheres 38. Such adjusting means connects the movable portion 27 and the base portion 23 so as to be relatively movable within the range of the gap S in the direction of the seesaw motion. As described in detail below, the movable portion 27 serves as an adjusting unit.
It is attached to the base 23 by two adjusting screws 61,62. One adjusting screw 61 has two flat washers 57a and 57b.
And a spring member 59 such as a compression coil spring provided therebetween, and is inserted into a mounting hole 64 passing through the movable portion 27 and the positioning plate 41. Further, the other adjusting screw 62 is connected to the movable portion 27 on the diagonally opposite side of the one mounting hole 64.
Is inserted through a mounting hole 65 penetrating through. This mounting hole
An adjusting screw 62 is screwed into an adjusting screw hole 68 formed in the base 23 so as to face the 65. That is, the adjusting means includes a spring member 59 which urges the movable portion 27 in one direction with respect to the base 38 with the sphere 38 as a fulcrum, and an adjustment for moving the movable portion 27 in the opposite direction with respect to the base 23 with the sphere 38 as a fulcrum. It has screws 61 and 62.

Further, on the upper surface of the base 23, in addition to the adjustment screw holes 67 and 68, additional adjustment screw holes 71 and 72 are formed at positions at an angle of 90 ° with respect to the adjustment screw holes 67 and 68. These additional adjustment screw holes 7
The role of 1,72 will be clarified later.

In this manner, the movable portion 27 is capable of seesaw movement within a small angle with respect to the upper surface of the base portion 23 with the two spheres 38 on the first diagonal line serving as fulcrums. The optical element 26 changes its direction along with the movable section 27. As a result, the direction of the laser beam after penetrating the optical element 26 can be finely adjusted. In addition,
The optical element 26 is attached to the upper surface of the movable section 27 in accordance with the positioning plate 41.

Next, the operation of finely adjusting the optical element 26 using the optical element mounting device will be described.

For fine adjustment in the rotation direction, the two screws 31 screwed into the mounting base 21 are slightly loosened, and the base 23 is rotated about the mounting shaft 35 by an eccentric driver. This operation is performed by inserting the eccentric driver into the adjustment groove 23c from above and rotating the eccentric driver. At this time, it goes without saying that the tip of the eccentric driver is inserted into the reference hole 33.

Further, to finely adjust the direction of the movable portion 27 around the horizontal axis, the adjusting screw 62 is tightened or loosened. Then, the movable portion 27 performs the seesaw motion by the rotation amount and the pitch amount of the adjusting screw 62 with the sphere 38 as a fulcrum. Here, the resilient force of the spring member 59 urges the movable portion 27, thereby stabilizing the posture of the movable portion 27. Thus, the moving part
For fine adjustment of 27, the seesaw movement can be performed only in the gap S between the base portion 23 and the movable portion 27 by loosening or tightening the adjustment screws 61 and 62.

When the movable part 27 and the sphere 38 are changed by 90 ° on the upper surface of the base 23 and the spheres 38 are arranged in the ball receiving holes 39c, 39d, 40a, 40b, the seesaw of the movable part 27 with respect to the upper surface of the base 23 is obtained. Exercise 90
The angle can be changed to °. At this time,
61 and 62 are screwed into additional adjustment screw holes 71 and 72 formed on the upper surface of the base 23.

In addition, in this optical element mounting device, there is a case where the optical element 26 is provided on the movable portion 27 using the adjusting means.

This adjusting means is provided on the opposing surfaces of the base 23 and the movable part 27.
A plurality of sets of opposing ball receiving holes 39a to 39d, 40a to formed at different positions along a straight line intersecting a predetermined straight line
40d and spheres 38 arranged between these ball receiving holes 39a to 39d and 40a to 40d, respectively.

When the base 23 and the movable part 27 are fixed by the adjusting screws 61 and 62 using such an adjusting means, the optical element 26 is
23 can be provided in parallel with the upper surface.

In this way, a plurality of adjacent optical element mounting devices can be used in parallel with the upper surface of the base 23. At this time, even if the spring member 59 is not used, it is possible to keep the adjustment screws 61 and 62 in parallel by fine adjustment.

Further, instead of the positioning plate 41, the movable portion 2 is formed by using the movable plate 5a, the support 5c, and the holding member 7 shown in FIGS.
The optical element 26 can be positioned so as to be mechanically attached to the upper surface of 7. In this case, the lower portions of the columns 5c are fitted into the screw holes 43, 44 instead of the screws 47, 48. In this way, the optical element 26 can be positioned and fixed between the movable part 27 and the lower end of the holding member 7.

[Effects of the Invention] As described above with the embodiments, according to the optical element mounting device of the present invention, the base can be easily adjusted in the rotational direction with respect to the mounting base, and the fine adjustment of the movable portion is adjusted. The laser light can be easily changed to a predetermined position by tightening or loosening the screw.

The movable part must change direction depending on the model, but can be easily changed by changing the position of the sphere.

Furthermore, since the optical element mounting device does not have an outwardly protruding portion and all fine adjustments can be performed from above, several optical element mounting devices can be installed adjacent to each other in a small space, and the device is compact. An inexpensive optical element mounting device that can be designed and manufactured can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an optical element mounting apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II showing an assembled state of the optical element mounting apparatus shown in FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing a fitted state, FIG. 4 is a perspective view showing a movable portion, FIG. 5 is a side view of a conventional optical element mounting device, and FIG. 6 is a plan view of the optical element mounting device of FIG. 1; mounting base, 3; base, 5; movable part, 7; holding member, 9.1
1; tilt adjustment member, 13; rotation adjustment member, 21; mounting base,
23; base, 25; optical element, 25c; adjustment groove, 27; movable part, 29
a, 29b; screw hole, 31 ;, 33; reference hole, 35; mounting shaft, 38; sphere,
39a, 39b, 39c, 39d; Ball receiving hole, 40a, 40b, 40c, 40d; Ball receiving hole, 4
1; Positioning plate, 43, 44; Mounting hole, 51, 53; Pin, 59; Spring member, 61, 62; Adjusting screw, 64, 65; Mounting hole, 67, 68; Adjusting screw hole, 71, 72; Additional Adjustment screw hole.

Claims (1)

(57) [Scope of request for utility model registration] 1. An optical element mounting apparatus comprising: a movable portion for mounting an optical element; and a base on which the movable portion is mounted so that the posture can be adjusted, wherein a gap is formed between the movable portion and the base. The optical element is configured to perform a seesaw motion on the movable part by changing a relative distance between the two spheres sandwiched and arranged along a predetermined straight line and the movable part and the base within the range of the gap. The movable part and the base are provided on both sides of the movable part sandwiching the predetermined straight line passing through each of the spheres so as to adjust the posture of the movable part with the movable part and the base in the direction of the seesaw movement. An optical element mounting device comprising: an adjusting means connected to be relatively movable within a range of the gap.