JP6687268B1 - Adjusting structure of optical component and optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjustment structure for an optical component, which can easily adjust the position of the optical component in the three-dimensional orthogonal directions of the X-axis, the Y-axis and the Z-axis.
SOLUTION: The adjustment structure of an optical component is such that a first optical component is fixed and a cylindrical body 8 having an external thread formed on an outer peripheral surface and a second optical component are fixed, and one of the cylindrical body 8 is fixed. A holder 6 having a contact surface with which the ends contact, a first through hole formed in the housing 10 of the optical device 1 and having a female screw formed on the peripheral surface thereof into which the male screw of the tubular body 8 is screwed, and the holder A bolt that fixes 6 to the housing 10 and a second through hole that is formed in the housing 10 and through which the bolt passes are provided. The diameter of the second through hole is larger than the diameter of the shaft portion of the bolt.
[Selection diagram] Figure 1

Description

  The present disclosure relates to an adjustment structure for an optical component and an optical device.

  A general optical device is required to arrange optical components with high accuracy. For example, the optical path adjusting device of Patent Document 1 includes a first fixing member to which a semiconductor laser is fixed and a second fixing member to which a collimator lens is fixed. Then, the first bolt passed through the through hole formed in the first fixing member is screwed into the second fixing member, and the second bolt passed through the through hole formed in the second fixing member is inserted into the optical system supporting portion. It is screwed into the outer wall of the body.

  At this time, the diameter of the through hole of the first fixing member is larger than the diameter of the shaft portion of the first bolt, and the diameter of the through hole of the second fixing member is larger than the diameter of the shaft portion of the second bolt. ing. As a result, the first fixing member is moved in the X-axis direction and the Y-axis direction that are two orthogonal axial directions with respect to the second fixing member with the first bolt loosened, and the second fixing member is moved with the second bolt loosened. The optical path can be adjusted by moving the fixing member in the X-axis direction and the Y-axis direction with respect to the outer wall of the optical system support body. Incidentally, the optical axis of the semiconductor laser is the Z axis, and the X axis and the Y axis are orthogonal to the Z axis.

JP-A-5-323166

  The optical path adjusting device of Patent Document 1 is configured to be able to adjust the positions of optical components such as a semiconductor laser and a collimator lens in the X-axis direction and the Y-axis direction, but the Z-axis orthogonal to the X-axis and the Y-axis. It is not configured to adjust the position of the optical component in the direction.

  Here, for example, by inserting and removing shims having different thicknesses between the first fixing member and the second fixing member and between the second fixing member and the outer wall of the optical system support body, the Z-axis of the optical component is inserted. It is possible to adjust the directional position.

  However, each time the shim having a different thickness is inserted and removed to adjust the position of the optical component in the Z-axis direction, the position of the optical component in the X-axis direction and the Y-axis direction shifts, and the X-axis direction and the Y-axis direction of the optical component again occur. It is necessary to re-adjust the position in the axial direction, and the position adjustment of the optical component in the X-axis direction, the Y-axis direction, and the Z-axis direction is complicated.

  One of the objects to be achieved by the embodiments disclosed herein is to provide an adjusting structure for an optical component and an optical device that contribute to solving the problem. It should be noted that this goal is only one of the goals that the embodiments disclosed herein seek to achieve. Other objects or problems and novel features will become apparent from the description of the present specification or the accompanying drawings.

The adjustment structure of the optical component of the first aspect is
A cylindrical body to which the first optical component is fixed and an external thread is formed on the outer peripheral surface;
A holder to which a second optical component is fixed and which has a contact surface with which one end of the tubular body contacts;
A first through hole formed in a housing of the optical device, the peripheral surface of which is formed with a female screw into which the male screw of the cylindrical body is screwed;
A bolt for fixing the holder to the housing,
A second through hole formed in the housing and through which the bolt is inserted;
Equipped with
The diameter of the second through hole is larger than the diameter of the shaft portion of the bolt.

  According to the above-described aspect, it is possible to provide an optical component adjustment structure and an optical device that can easily perform position adjustment in the X-axis direction, the Y-axis direction, and the Z-axis direction that are three-dimensional orthogonal to the optical component.

FIG. 3 is a diagram for explaining the configuration of the optical device according to the first embodiment. FIG. 3 is an exploded perspective view showing the adjustment structure of the optical component of the first embodiment. FIG. 3 is a perspective view of the adjustment structure of the optical component of the first embodiment as viewed from the Z axis − side. FIG. 3 is a perspective view of the adjustment structure of the optical component of the first embodiment as viewed from the Z axis + side. FIG. 7 is a diagram of a state in which a bolt is screwed into the holder in the optical component adjusting structure according to the first embodiment, as viewed from the Y axis + side. FIG. 6 is a diagram of a state in which a bolt is screwed into a holder in the adjustment structure for an optical component according to the first embodiment, viewed from the X-axis-side. FIG. 6 is a diagram of a state in which the tubular body is screwed into the housing, as viewed from the Y axis + side, in the adjustment structure for the optical component of the first embodiment. FIG. 5 is a diagram of a state in which the tubular body is screwed into the housing in the optical component adjusting structure according to the first embodiment as viewed from the X-axis-side. FIG. 6 is a diagram showing how the positions of the optical filter in the X-axis direction and the Y-axis direction are adjusted in the adjustment structure of the optical component according to the first embodiment, as viewed from the Z-axis + side. FIG. 6 is a diagram showing how the position of the optical filter is adjusted in the X-axis direction and the Y-axis direction via a bolt in the adjustment structure of the optical component of the first embodiment, as viewed from the Y-axis + side. FIG. 6 is a view of adjusting the position of the optical filter in the X-axis direction and the Y-axis direction via a bolt in the adjustment structure for the optical component of the first embodiment, as viewed from the X-axis-side. FIG. 13 is a diagram of a state in which a bolt is screwed into a holder in the adjustment structure for an optical component of the second embodiment, viewed from the Y axis + side.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the following embodiments. Further, the following description and the drawings are simplified as appropriate for clarifying the explanation.

<Embodiment 1>
First, the optical device according to the present embodiment will be briefly described. FIG. 1 is a diagram for explaining the configuration of the optical device according to the present embodiment. In the optical device 1, the light emitted from the light source 2 is provided on the tubular body 8 via the reflection mirror 3, the first lens 4 and the optical filter (second optical component) 7 provided on the holder 6. The light is emitted from the second lens (first optical component) 9, and each of these elements is fixed to the housing 10.

  Next, the adjustment structure of the optical component of the present embodiment will be described. In the following description, an orthogonal three-dimensional (XYZ) coordinate system will be used for the sake of clarity. FIG. 2 is an exploded perspective view showing the adjustment structure of the optical component of the present embodiment. FIG. 3 is a perspective view of the adjustment structure of the optical component according to the present embodiment as viewed from the Z-axis-side. FIG. 4 is a perspective view of the adjusting structure of the optical component according to the present embodiment as viewed from the Z axis + side.

  The adjustment structure of the optical component of the present embodiment is configured so that the position of the optical filter 7 provided on the holder 6 in the X axis direction, the Y axis direction, and the Z axis direction can be adjusted. Specifically, as shown in FIGS. 2 to 4, the adjustment structure of the optical component is formed in the cylindrical body 8 in which the second lens 9 is provided, the holder 6 in which the optical filter 7 is provided, and the housing 10. The first through hole 10a and the second through hole 10b, the bolt 11 and the spring washer 12 are provided.

  As shown in FIG. 2, the cylindrical body 8 has a cylindrical shape as a basic form, and the second lens 9 is fixed inside the cylindrical body 8. A male screw 8a is formed on the outer peripheral surface of the tubular body 8. The end surface of the tubular body 8 on the Z axis + side is a flat surface and is arranged on a substantially XY plane. Such a tubular body 8 is made of metal such as aluminum.

  The holder 6 is basically a plate-shaped body having an opening 6a formed therein, and is arranged inside the housing 10 as shown in FIGS. 3 and 4. As shown in FIG. 2, for example, the opening 6a has a circular shape when viewed from the Z-axis direction and penetrates the holder 6 in the Z-axis direction. A counterbore 6b is formed on the surface of the holder 6 on the −Z axis side so as to surround the opening 6a.

  The counterbore portion 6b is formed so as to be able to accommodate the end of the tubular body 8 on the + Z axis side, and has, for example, a substantially annular shape centered on the center of the opening 6a when viewed in the Z axis direction. The surface (bottom surface) of the counterbore portion 6b on the Z axis + side is flat and is arranged on a substantially XY plane.

  A plurality of screw holes 6c are formed on the Z-axis-side surface of the holder 6. On the other hand, an optical filter 7 is fixed to the Z-axis + side surface of the holder 6 so as to cover the opening 6a from the Z-axis + side. Such a holder 6 is made of metal such as aluminum.

  The first through hole 10a penetrates the side wall 10c of the housing 10 in the thickness direction of the side wall 10c, and roughly overlaps the opening 6a of the holder 6 when viewed from the Z-axis direction. That is, the first through hole 10a extends, for example, in the Z-axis direction. A female screw 10d is formed on the peripheral surface of the first through hole 10a.

  The tubular body 8 is passed through the first through hole 10a so that the male screw 8a of the tubular body 8 is screwed into the female screw 10d, and the end surface of the tubular body 8 on the Z axis + side is the counterbore portion of the holder 6. It is in surface contact with the bottom surface of 6b. That is, the bottom surface of the countersunk portion 6b of the holder 6 functions as a contact surface with which the end surface on the Z axis + side of the tubular body 8 contacts.

  The second through hole 10b penetrates the side wall 10c of the housing 10 in the thickness direction of the side wall 10c. That is, the second through hole 10b also extends in the Z-axis direction. A plurality of second through holes 10b are arranged around the first through hole 10a so as to roughly correspond to the screw holes 6c of the holder 6.

  At this time, although a detailed function will be described later, the plurality of second through holes 10b have a center of gravity of the first through hole 10a as a center of gravity, and a side on the Y axis + side of the side wall 10c of the housing 10 and a Y axis. It may be arranged diagonally to a rectangle or a square having sides parallel to the − side.

  The bolt 11 is passed through the second through hole 10b and screwed into the screw hole 6c of the holder 6. Thereby, the holder 6 is fixed to the housing 10 in a state where the end surface of the tubular body 8 on the + Z axis side is in surface contact with the bottom surface of the countersink portion 6b of the holder 6. That is, the positions of the optical filter 7 in the X-axis direction, the Y-axis direction, and the Z-axis direction are fixed. At this time, the diameter of the second through hole 10b is set larger than the diameter of the shaft portion 11a of the bolt 11.

  The spring washer 12 is arranged between the head portion 11 b of the bolt 11 and the side wall 10 c of the housing 10 while being passed through the shaft portion 11 a of the bolt 11. However, although the spring washer 12 is used in the present embodiment, a disc spring or the like may be used as long as it is an elastic body that exerts an elastic force between the head portion 11b of the bolt 11 and the side wall 10c of the housing 10. .

  Next, a flow of adjusting the position of the optical filter 7 in the adjusting structure of the optical component according to the present embodiment will be described. FIG. 5 is a view of the state in which the bolt is screwed into the holder as viewed from the Y axis + side. FIG. 6 is a view of the state in which the bolt is screwed into the holder as seen from the X-axis-side. FIG. 7 is a diagram of a state in which the tubular body is screwed into the housing as viewed from the Y axis + side. FIG. 8 is a diagram of a state in which the tubular body is screwed into the housing, as viewed from the X-axis-side. FIG. 9 is a diagram showing how the positions of the optical filter in the X-axis direction and the Y-axis direction are adjusted as viewed from the Z-axis + side. FIG. 10 is a diagram showing how the position of the optical filter in the X-axis direction and the Y-axis direction is adjusted via the bolt as viewed from the Y-axis + side. FIG. 11 is a diagram showing how the positions of the optical filter in the X-axis direction and the Y-axis direction are adjusted via the bolts, as viewed from the X-axis-side.

  First, as shown in FIGS. 5 and 6, the holder 6 is arranged inside the housing 10. At this time, the surface of the holder 6 on the side where the countersink portion 6b is formed is arranged so as to face the side wall 10c of the housing 10.

  Then, the screw hole 6c and the second through hole 10b are arranged so that the screw hole 6c of the holder 6 and the second through hole 10b of the housing 10 overlap each other when viewed from the Z-axis direction. From the outside, the bolt 11 is passed through the second through hole 10b and screwed into the screw hole 6c. At this time, the bolt 11 is temporarily tightened in the screw hole 6c to such an extent that the spring washer 12 is lightly brought into contact with the side wall 10c of the housing 10 while the optical filter 7 is arranged near the desired position in the Z-axis direction.

  Next, as shown in FIGS. 7 and 8, the male screw 8a of the tubular body 8 is screwed into the female screw 10d of the housing 10 so that the end surface of the tubular body 8 on the Z axis + side is counterbored to the holder 6b. Make a surface contact with the bottom of the.

  While maintaining the state in which the end surface of the tubular body 8 on the Z axis + side is in surface contact with the bottom surface of the counterbore portion 6b of the holder 6, so that the optical filter 7 is arranged at a desired position in the Z axis direction, The screwing amount of the male screw 8a of the tubular body 8 is adjusted.

  At this time, since the spring washer 12 is arranged between the side wall 10c of the housing 10 and the head 11b of the bolt 11, the Z-axis movement of the holder 6 can be absorbed by the spring washer 12.

  In this way, the Z-axis + side end surface of the tubular body 8 is pressed against the bottom surface of the counterbore portion 6b of the holder 6 by the elastic force of the spring washer 12, so Accordingly, the position of the optical filter 7 in the Z-axis direction can be adjusted via the holder 6. Then, if the screwing amount of the male screw 8a of the tubular body 8 is determined, the optical filter 7 can be fixed at a desired position in the Z-axis direction.

  At this time, if the polygonal portion 8b is provided on the outer peripheral surface of the tubular body 8 on the −Z axis side, the operator can easily screw in the male screw 8a of the tubular body 8 while pinching the polygonal portion 8b. The amount can be adjusted.

  Next, the bottom surface of the counterbore portion 6b of the holder 6 is slid with respect to the Z-axis + side end surface of the tubular body 8 so that the optical filter 7 is arranged at a desired position in the X-axis direction and the Y-axis direction. While moving, the optical filter 7 is moved in the X-axis direction and the Y-axis direction via the holder 6.

  At this time, as described above, since the diameter of the second through hole 10b of the housing 10 is larger than the diameter of the shaft portion 11a of the bolt 11, as shown in FIG. And can be moved in the Y-axis direction. Here, for example, as shown in FIGS. 10 and 11, since the head 11b of the bolt 11 is arranged outside the housing 10, the operator picks the head 11b of the bolt 11 to attach the holder 6 to the holder 6. It can be moved in the X-axis direction and the Y-axis direction.

  In addition, the plurality of second through holes 10b have a center of gravity of the first through hole 10a as a center of gravity and a side parallel to the Y axis + side and the Y axis − side of the side wall 10c of the housing 10. They are arranged diagonally to a rectangle or square. As a result, when the holder 6 is moved in the X-axis direction and the Y-axis direction, it is possible to suppress the holder 6 from rotating around the X-axis and the Y-axis.

  Moreover, since the end surface of the cylindrical body 8 on the + Z axis side is in surface contact with the bottom surface of the counterbore portion 6b of the holder 6, the optical filter 7 is accurately moved in the X axis direction and the Y axis direction via the holder 6. It can be moved.

  In this way, when the optical filter 7 is arranged at a desired position in the Z-axis direction, and further, the optical filter 7 is arranged at a desired position in the X-axis direction and the Y-axis direction, the bolt 11 is screwed into the screw hole 6c of the holder 6. Then, screw it in to tighten the bolt 11 fully. At this time, since the end surface of the tubular body 8 on the + Z axis side is in surface contact with the bottom surface of the countersunk portion 6b of the holder 6, it is difficult for the optical filter 7 to be displaced in the Z axis direction. As a result, the optical filter 7 can be fixed at desired positions in the X-axis direction, the Y-axis direction, and the Z-axis direction.

  As described above, the optical component adjusting structure and the optical device 1 according to the present embodiment are configured so that the end of the tubular body 8 on the Z axis + side is in contact with the bottom surface of the counterbore 6b of the holder 6. The position of the optical filter 7 in the Z-axis direction can be adjusted via the holder 6 according to the screwing amount of the male screw 8a of No. 8, and if the screwing amount of the male screw 8a of the tubular body 8 is determined, the optical filter 7 is It can be fixed at a desired position in the Z-axis direction. Then, with the end of the tubular body 8 on the Z axis + side in contact with the bottom surface of the countersunk portion 6b of the holder 6, the position of the optical filter 7 in the X axis direction and the Y axis direction is adjusted via the holder 6. It can be carried out.

  Therefore, as compared with the case where the position of the optical component in the Z-axis direction is adjusted by inserting and removing the shim, a displacement in the Z-axis direction occurs each time the position of the optical filter 7 is adjusted in the X-axis direction and the Y-axis direction. It is difficult to adjust the position of the optical filter 7 in the three-dimensional orthogonal directions, that is, the X-axis direction, the Y-axis direction, and the Z-axis direction.

<Second Embodiment>
As shown in FIG. 12, a scale 21 is preferably formed on the outer peripheral surface of the tubular body 8 so that the operator can visually recognize the screwing amount of the male screw 8a of the tubular body 8. As a result, the operator can visually recognize the screwing amount of the male screw 8a of the tubular body 8. Although the scale 21 is formed on the outer peripheral surface of the tubular body 8 in the present embodiment, the amount of the male screw 8a of the tubular body 8 to be screwed may be visually recognized.

  The above-described embodiments are merely examples of application of the technical idea obtained by the inventor of the present invention. That is, the technical idea is not limited to the above-described embodiments, and it goes without saying that various modifications can be made.

  For example, although the holder 6, the tubular body 8 and the housing 10 of the above-described embodiment are made of metal such as aluminum, when adjusting the position of the optical filter 7 in the X-axis direction, the Y-axis direction and the Z-axis direction. Any material that is difficult to deform may be used.

  For example, although the first optical component is configured by the second lens 9 and the second optical component is configured by the optical filter 7, the first optical component and the second optical component are arranged on the optical path. It is not limited as long as it is a component.

  For example, in the above embodiment, the spring washer 12 is arranged between the side wall 10c of the housing 10 and the head 11b of the bolt 11, but it may be omitted. In this case, in order to maintain the state in which the end surface of the tubular body 8 on the Z axis + side is in contact with the bottom surface of the countersunk portion 6b of the holder 6, in correspondence with the screw amount of the male screw 8a of the tubular body 8, The screwing amount of the bolt 11 may be adjusted.

  For example, in the above-described embodiment, the end surface of the tubular body 8 on the Z axis + side is brought into surface contact with the bottom surface of the counterbore portion 6b of the holder 6, but in the stable state of the holder 6, the X axis direction and the Y axis direction. The Z-axis + side end of the tubular body 8 may be brought into contact with the bottom surface of the countersunk portion 6b of the holder 6 so that the position can be adjusted. In that case, the end surface on the Z axis + side of the tubular body 8 and the bottom surface of the counterbore portion 6b of the holder 6 are brought into contact with each other in a point-symmetrical arrangement centered on the central axis of the tubular body 8, or the tubular body 8 It is preferable that the end surface on the + side of the Z axis and the bottom surface of the countersunk portion 6b of the holder 6 be in line contact with each other in an annular shape.

  For example, although the holder 6 of the above-described embodiment includes the countersunk portion 6b, the countersunk portion 6b may be omitted. In that case, the end surface of the tubular body 8 on the Z axis + side may be brought into contact with the surface of the holder 6 on the Z axis − side.

1 Optical Device 2 Light Source 4 First Lens 6 Holder, 6a Opening, 6b Counterbore, 6c Screw Hole 7 Optical Filter 8 Cylindrical Body, 8a Male Screw, 8b Polygonal Section 9 Second Lens 10 Housing 10a First through hole, 10b Second through hole, 10c Side wall, 10d Female screw 11 Bolt, 11a Shaft part, 11b Head part 12 Spring washer 21 Scale

Claims (7)

A cylindrical body to which the first optical component is fixed and an external thread is formed on the outer peripheral surface;
A holder to which a second optical component is fixed and which has a contact surface with which one end of the tubular body contacts;
A first through hole formed in a housing of the optical device, the peripheral surface of which is formed with a female screw into which the male screw of the cylindrical body is screwed;
A bolt for fixing the holder to the housing,
A second through hole formed in the housing and through which the bolt is inserted;
Equipped with
The adjustment structure for an optical component, wherein the diameter of the second through hole is larger than the diameter of the shaft portion of the bolt.   The second through-hole has a center of gravity of the first through-hole as a center of gravity, and is a regular square or a rectangle having one side parallel to at least one side of the side wall of the housing in which the first through-hole is formed. The adjustment structure for an optical component according to claim 1, wherein the adjustment structure is arranged diagonally.   The adjustment structure for an optical component according to claim 1, wherein one end of the tubular body and a contact surface of the holder are in surface contact with each other.   The adjusting structure for an optical component according to claim 1, further comprising an elastic body disposed between the head of the bolt and the housing.   The optical component adjusting structure according to any one of claims 1 to 4, further comprising a polygonal portion on an outer peripheral surface on the side of the other end of the tubular body.   The tubular body is formed with a visual recognition portion that indicates the amount of screwing of the male screw of the tubular body. The adjustment structure for an optical component according to claim 1.   An optical device comprising the adjustment structure for an optical component according to claim 1.

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