JP4508673B2 - Optical component holding mechanism - Google Patents

Description

  The present invention relates to an optical component holding mechanism that holds an optical component such as a lens or a diffraction grating so as to be adjustable in an optical axis direction and / or a rotation direction around the optical axis.

As a conventional optical component holding mechanism, for example, as shown in FIG. 17A, a plan view, and in FIG. 17B, a cross-sectional view taken along line Q-Q in FIG. The frame 52 is attached to the fixed block 53 with a screw 55 via a leaf spring 54 so as to be pressed against the two wall surfaces 53a and 53b formed on the fixed block 53, so that the frame 52 can be slid along the optical axis. A lens that holds the position of the lens 51 in the optical axis direction in an adjustable manner is known.
JP 11-328721 A (paragraph 0015)

  However, the optical component holding mechanism disclosed in Patent Document 1 requires a leaf spring 54 and screws 55 for mounting the frame 52, which increases the number of components and increases the cost of the apparatus using the lens 51. In addition, there is a concern that it is difficult to reduce the size of the apparatus because a space for providing the leaf spring 54 and the screw 55 is required.

  Accordingly, an object of the present invention made in view of such a point is to provide an optical component holding mechanism capable of saving space and reducing costs.

The invention according to claim 1 is an optical component holding mechanism that holds a holding member that holds an optical component on a fixed block.
The holding member is formed with a portion having a different outer width in a direction perpendicular to the optical axis and a protrusion,
The fixing block is formed with a portion where the narrow outer width of the holding member is fitted, a portion where a portion with a large outer width is lightly press-fitted, and a recess where the protrusion is fitted,
After fitting the narrow portion of the holding member with the fixed block to the fixed block, the holding member is rotated about the optical axis to fit the protrusion into the recess, and the wide portion with the outer width. Is lightly press-fitted into the fixed block, and the holding member is held by the fixed block.

The invention according to claim 2 is an optical component holding mechanism that holds a holding member that holds an optical component on a fixed block.
The holding member is formed with a portion having a different outer width in a direction perpendicular to the optical axis and a protrusion,
In the fixing block, a portion where a narrow outer width of the holding member is fitted, a portion where a wide outer width is lightly press-fitted, and a concave portion where the protrusion is engaged are formed.
After fitting the narrow portion of the holding member to the fixed block, the holding member is rotated about the optical axis to bring the protrusion into contact with the bottom of the recess, and The wide part is lightly press-fitted into the fixed block, and the holding member is held by the fixed block.

The invention according to claim 3 is an optical component holding mechanism that holds a holding member that holds an optical component on a fixed block.
The holding member is formed with a portion having a different outer width in a direction perpendicular to the optical axis and a protrusion,
The fixing block communicates with a portion where the narrow portion of the holding member is fitted, a portion where a portion with a large outer width is lightly press-fitted, a groove portion with which the protrusion is engaged, and the groove portion. Forming an opening for adjustment,
After fitting the narrow portion of the holding member to the fixed block, the holding member is rotated about the optical axis to engage the protrusion with the groove, and the wide portion of the external width. Is lightly press-fitted into the fixing block, and in this state, a jig is passed through the adjustment opening, the position of the holding member in the rotation direction is adjusted by the jig through the protrusion, and the holding member is It is configured to be held by a fixed block.

The invention according to claim 4 is an optical component holding mechanism that holds a holding member that holds an optical component on a fixed block.
The holding member is formed with a portion having a different outer width in a direction perpendicular to the optical axis,
The fixed block is formed with two opposing side walls into which the portion with the large outer width of the holding member is lightly press-fitted, and a bottom wall with which the portion with the large outer width abuts,
After the portion having the large outer width of the holding member is brought into contact with the bottom wall and the portion having the small outer width is inserted into the fixed block, the holding member is rotated about the optical axis, and the outer width is The holding member is held by the fixed block by abutting a wide portion of the holding member against the two side walls and the bottom wall.

According to each of the first to fourth aspects of the present invention, since the holding member can be fixed to the fixing block without using a spring or the like, it is possible to realize an optical component holding mechanism that is space-saving and inexpensive.

Hereinafter, it will be explained the embodiment of the optical component holding mechanism according to the present invention.

(First Reference Example)
FIGS. 1 to 3 show a first reference example of an optical component holding mechanism developed together with the present invention. FIG. 1A is a plan view of a holding member holding an optical component, and FIG. FIG. 2A is a cross-sectional view taken along the line AA in FIG. 2A, FIG. 2A is a plan view for explaining the operation of inserting the holding member into the fixed block, and FIG. 2B is a line BB in FIG. 3A is a plan view for explaining the position adjusting operation of the holding member, and FIG. 3B is a sectional view taken along the line CC of FIG. 3A.

In this reference example, the condensing lens 1 that is an optical component is bonded and fixed to a frame 2 that is a holding member, and the frame 2 is attached to a fixed block 3 so that its position can be adjusted in the optical axis direction.

  The frame 2 that holds the condenser lens 1 is formed with flat portions 2a and 2b that are cut flat (D cut) along the axial direction at two axially symmetrical positions on the circumferential surface of the cylindrical member, The width between the flat portions 2a and 2b is made narrower than the width (outer diameter size) between the arc portions 2c and 2d that are not cut. In addition, a hole 2e is formed in the circular arc portion 2c of the frame 2 so that the jig 4 for rotation and optical axis position adjustment is engaged.

  On the other hand, the fixed block 3 is formed with rising portions 3a and 3b that are opposed to each other so that the narrow flat portions 2a and 2b of the frame 2 are fitted to each other, and on the opposite surface side of the rising portions 3a and 3b. Grooves are formed, respectively, to form a total of four edge portions 3c, two of which are lightly press-fitted into the wide circular arc portions 2c, 2d of the frame 2. Further, the fixed block 3 is formed with a recess 3d at the upper end of the rising portion 3b so that the rotation position of the frame 2 by the jig 4 and the movement position in the optical axis direction can be adjusted, and between the rising portions 3a and 3b. An opening 3e is formed at the bottom for holding the frame 2.

The operation of the optical component holding mechanism according to this reference example will be described below. First, the frame 2 to which the condenser lens 1 is bonded and fixed is inserted between the rising portions 3a and 3b of the fixed block 3, and the flat width of the frame 2 is narrow as shown in FIGS. 2 (a) and 2 (b). The parts 2a and 2b are fitted. At this time, the hole 2e formed in the circular arc part 2c of the frame 2 is positioned at the upper part.

  Next, as shown in FIG. 2 (b), the tip of the jig 4 is inserted into the hole 2e of the frame 2, and the jig 4 is rotated in the direction of arrow a, as shown in FIG. 3 (b). The frame 2 is rotated about the optical axis to move the wide arc portions 2c, 2d to the four edge portions 3c of the rising portions 3a, 3b. The frame 2 is held in the fixed block 3 by press-fitting.

  Thereafter, the jig 2 moves the frame 2 in the optical axis direction indicated by the double arrow b to adjust the position of the condenser lens 1. After adjustment, the frame 2 is fixed to the fixed block 3 with an adhesive or the like as necessary. Reinforce and fix.

As described above, according to this reference example , the frame 2 can be fixed to the fixed block 3 so as to be adjustable in the optical axis direction without using a spring or the like, so that an optical component holding mechanism that saves space and is inexpensive can be realized. Can do.

(First embodiment)
4 to 6 show a first embodiment of the present invention. FIG. 4 (a) is a plan view of a holding member holding an optical component, and FIG. 4 (b) is a cross-sectional view of FIG. FIG. 5A is a cross-sectional view taken along line D, FIG. 5A is a plan view for explaining the operation of inserting the holding member into the fixed block, FIG. 5B is a cross-sectional view taken along line EE in FIG. FIG. 6A is a plan view for explaining the position adjusting operation of the holding member, and FIG. 6B is a cross-sectional view taken along line FF in FIG.

  In the present embodiment, the diffraction grating 5 that is an optical component is bonded and fixed to a frame 6 that is a holding member, and this frame 6 is attached to a fixed block 7 so as to be rotatable about the optical axis.

On the frame 6 that holds the diffraction grating 5, flat portions 6a and 6b that are D-cut flat along the axial direction are formed at two axially symmetrical positions on the circumferential surface of the cylindrical member, as in the first reference example. Then, the width between the flat portions 6a and 6b is made narrower than the width (outer diameter size) between the arc portions 6c and 6d that are not cut. Further, a protrusion 6e for adjusting the rotation is formed on the arc portion 6c of the frame 6.

On the other hand, as in the first reference example , the fixed block 7 is formed with rising portions 7a and 7b facing each other so that the flat portions 6a and 6b of the frame 6 are fitted to each other, and the rising portions 7a and 7b are opposed to each other. Grooves are formed on the surface side to be formed, and a total of four edge portions 7c into which the arc portions 6c and 6d of the frame 6 are lightly press-fitted are formed. In addition, the fixed block 7 is formed with a recess 7d at the upper end of the rising portion 7b so that the projection 6e is fitted to restrict the movement of the frame 6 in the optical axis direction, and the frame 6 between the rising portions 7a and 7b. An opening 7e is formed at the bottom for holding the.

  Hereinafter, the operation of the optical component holding mechanism according to the present embodiment will be described. First, the frame 6 to which the diffraction grating 5 is bonded and fixed is inserted between the rising portions 7a and 7b of the fixed block 7, and as shown in FIGS. 6a and 6b are fitted. At this time, the protrusion 6e formed on the circular arc part 6c of the frame 6 is positioned at the upper part.

  Next, as shown in FIG. 5 (b), the frame 6 is rotated about the optical axis in the direction of arrow a through the projection 6e of the frame 6, as shown in FIGS. 6 (a) and 6 (b). The wide circular arc portions 6c and 6d of the frame 6 are lightly press-fitted into the four edge portions 7c of the rising portions 7a and 7b, and the protrusion 6e is fitted into the concave portion 7d of the rising portion 7b.

  Thereafter, the arcs 6c and 6d of the frame 6 are lightly press-fitted into the four edge portions 7c, and the projection 6e is fitted into the recess 7d, and the frame 6 is centered on the optical axis via the projection 6e. By rotating, the rotation of the diffraction grating 5 is adjusted in a plane orthogonal to the optical axis. After adjustment, the frame 6 is reinforced and fixed to the fixed block 7 with an adhesive or the like as necessary.

  As described above, according to the present embodiment, the frame 6 can be fixed to the fixed block 7 so as to be rotatable about the optical axis without using a spring or the like. Can be realized. Further, since the protrusion 6e of the frame 6 is fitted into the recess 7d of the rising portion 7b to adjust the rotation of the frame 6, the optical axis direction indicated by the double-headed arrow b in FIG. Can be reliably controlled. Therefore, the diffraction grating 5 held on the frame 6 can be easily and accurately rotated and adjusted.

(Second Embodiment)
7 to 9 show a second embodiment of the present invention. FIG. 7 (a) is a plan view of a holding member holding an optical component, and FIG. 7 (b) is a cross-sectional view of FIG. FIG. 7C is a bottom view of FIG. 7A, FIG. 8A is a plan view for explaining the operation of inserting the holding member into the fixed block, and FIG. 8B is a diagram. 8A is a cross-sectional view taken along the line H-H, FIG. 9A is a plan view for explaining the position adjustment operation of the holding member, and FIG. 9B is a cross-sectional view taken along the line I-I in FIG. It is.

  In this embodiment, the condensing lens 11 and the wave plate 12 that are optical components are bonded and fixed to a frame 13 that is a holding member, and the frame 13 is attached to the fixed block 14 so that the position can be adjusted in the optical axis direction. The wave plate 12 is held on the end surface (bottom surface) opposite to the end of the frame 13 holding the condenser lens 11.

  Similarly to the above-described embodiment, the frame 13 is formed with flat portions 13a and 13b that are D-cut flat along the axial direction at two axially symmetrical positions on the circumferential surface of the cylindrical member. The width between the portions 13a and 13b is made narrower than the width (outer diameter size) between the arc portions 13c and 13d that are not cut. Further, on the arc portion 13c of the frame 13, a rotation adjustment projection 13e is formed, and an adjustment groove 13f for engaging a jig 15 such as a minus driver is formed in the projection 13e.

  On the other hand, as in the above embodiment, the fixed block 14 is formed with rising portions 14a and 14b that are opposed to each other so that the flat portions 13a and 13b of the frame 13 are fitted to each other, and the rising portions 14a and 14b are opposed to each other. Grooves are formed on the surface to be formed, and four edge portions 14c into which the arc portions 13c and 13d of the frame 13 are lightly press-fitted are formed in total, four in total. Further, a protrusion 14e is engaged with the upper end of the rising portion 14b of the fixed block 14 to form a recess 14d that restricts the rotation of the frame 13 and the movement range in the optical axis direction, and communicates with the recess 14d. Thus, the adjustment groove 14e with which the jig 15 is engaged is formed. Further, the fixed block 14 is formed with an opening 14f in the bottom portion that holds the frame 6 between the rising portions 14a and 14b.

  Hereinafter, the operation of the optical component holding mechanism according to the present embodiment will be described. First, the frame 13 to which the condenser lens 11 and the wave plate 12 are bonded and fixed is inserted between the rising portions 14a and 14b of the fixed block 14, and as shown in FIGS. The narrow flat portions 13a and 13b are fitted. At this time, the protruding portion 13e formed on the arc portion 13c of the frame 13 is positioned at the top.

  Next, as shown in FIG. 8B, the frame 13 is rotated in the direction of arrow a about the optical axis via the protrusion 13e of the frame 13, as shown in FIGS. 9A and 9B. The protrusion 13e is brought into contact with the bottom of the recess 14d of the rising portion 14b, and the wide arc portions 13c and 13d of the frame 13 are lightly press-fitted into the four edge portions 14c of the rising portions 14a and 14b.

  Thereafter, as shown in FIGS. 9A and 9B, an adjustment groove 13f formed in the protrusion 13e of the frame 13, and an adjustment groove 14e formed in the rising portion 14b in communication with the recess 14d, A jig 15 such as a flat-blade screwdriver is inserted across the frame, and the jig 15 is rotated about the insertion direction, whereby the frame 13 is moved in the optical axis direction indicated by the double-headed arrow b, and the condenser lens 11 and The position of the wave plate 12 is adjusted integrally, and after adjustment, the frame 13 is reinforced and fixed to the fixed block 14 with an adhesive or the like as necessary.

According to the present embodiment, as in the first reference example , the frame 13 can be fixed to the fixed block 14 so as to be adjustable in the optical axis direction without using a spring or the like. A mechanism can be realized. Further, the frame 13 can be moved in the optical axis direction in a state where the rotational position around the optical axis is restricted.

(Third embodiment)
10 and 11 show a third embodiment of the present invention. FIG. 10 (a) is a plan view for explaining the operation of inserting the holding member into the fixed block, and FIG. 10 (b) is FIG. FIG. 11A is a sectional view taken along line JJ in FIG. 11A, FIG. 11A is a plan view for explaining the position adjusting operation of the holding member, and FIG. 11B is a sectional view taken along line KK in FIG. is there.

In this embodiment, in the second embodiment , the frame 13 is attached to the fixed block 14 so that the position of the frame 13 can be adjusted in the optical axis direction and the rotation direction around the optical axis.

Therefore, a vertical groove 14g through which the projection 13e of the frame 13 escapes is formed in the rising portion 14b of the fixed block 14 instead of the concave portion 14d, and an adjustment groove 14e is formed in communication with the upper portion of the vertical groove 14g. . Further, an adjustment opening 14h that is communicated with the vertical groove 14g and into which a jig 16 such as a minus driver can be inserted is formed below the rising portion 14b. A protrusion 13g with which the jig 16 abuts is formed on the protrusion 13e of the frame 13. Other configurations are the same as those of the second embodiment .

  Hereinafter, the operation of the optical component holding mechanism according to the present embodiment will be described. First, as in the third embodiment, a frame 13 to which the condenser lens 11 and the wave plate 12 are bonded and fixed is inserted between the rising portions 14a and 14b of the fixed block 14, and FIGS. ), The narrow flat portions 13a and 13b of the frame 13 are fitted.

  Next, as shown in FIG. 10 (b), the frame 13 is rotated about the optical axis in the direction of arrow a through the projection 13e of the frame 13, as shown in FIGS. 11 (a) and 11 (b). The protrusion 13e is positioned in the vertical groove 14g of the rising portion 14b, and the wide arc portions 13c and 13d of the frame 13 are lightly press-fitted into the four edge portions 14c of the rising portions 14a and 14b.

  Thereafter, the jig 15 is extended across the adjustment groove 13f of the frame 13 and the adjustment groove 14e of the rising portion 14b within a range where the arc portions 13c and 13d of the frame 13 are lightly press-fitted into the four edge portions 14c. At the same time, the jig 16 is inserted into the adjustment opening 14h of the rising portion 14b, and the position of the rotation direction is adjusted by rotating the frame 13 about the optical axis indicated by the double arrow c with the jig 15 and the jig 16. In the same manner as in the third embodiment, the jig 15 adjusts the position in the optical axis direction. When the frame 13 is rotated by the jig 16, the jig 16 is brought into contact with the protrusion 13 g of the frame 13.

  According to the present embodiment, as in the above-described embodiment, a space-saving and cost-effective optical component holding mechanism can be realized, and the frame 13 is fixed to the fixed block 14 with the optical axis direction and the optical axis as the center. The position can be adjusted with high accuracy in the direction of rotation.

(Second reference example)
FIGS. 12 to 14 show a second reference example developed together with the present invention. FIG. 12 (a) is a plan view of a holding member holding an optical component, and FIG. 12 (b) is a diagram L of FIG. 12 (a). FIG. 13A is a sectional view taken along line L, FIG. 13A is a plan view for explaining the operation of inserting the holding member into the fixed block, FIG. 13B is a sectional view taken along line MM in FIG. (A) is a top view for demonstrating the position adjustment operation | movement of a holding member, FIG.14 (b) is the NN sectional view taken on the line of Fig.14 (a).

This reference example is the same as the first reference example , in which one portion of the frame 2 is D-cut to form one flat portion 2a, all the other outer peripheral surfaces are arc portions 2f, and the rising portion 3b of the fixed block 3 The surface in contact with the frame 2 is a flat surface without forming the edge portion 3c, and the other configurations are the same as in the first reference example .

In this reference example , first, the frame 2 to which the condenser lens 1 is bonded and fixed is inserted between the rising portions 3a and 3b of the fixed block 3, and as shown in FIGS. The flat portion 2a having a narrow width 2 is fitted to the arc-symmetrical arc portion 2f. Thereafter, as shown in FIG. 13B, the tip of the jig 4 is inserted into the hole 2e of the frame 2, and the jig 4 is rotated in the direction of the arrow a, as shown in FIG. 14B. By moving the frame 2 around the optical axis by moving it to a position in contact with the recess 3d or in the vicinity thereof, the wide arc portion 2f is positioned between the two edge portions 3c of the rising portion 3a and the rising portion 3b. Then, the frame 2 is held in the fixed block 3, and in this state, the frame 2 is moved in the optical axis direction indicated by the double arrow b by the jig 4 to adjust the position of the condenser lens 1.

As described above, in this reference example , the D-cut surface (flat portion 2a) of the frame 2 is made one, and the surface of the rising portion 3b of the fixed block 3 with which the frame 2 abuts is a flat surface. The processing of the fixed block 3 is facilitated, and the cost can be further reduced as compared with the case of the first reference example .

(Fourth embodiment)
FIGS. 15 and 16 show a fourth embodiment of the present invention. FIG. 15 (a) is a plan view for explaining the operation of inserting the holding member into the fixed block, and FIG. 15 (b) is FIG. (A) OO sectional view, FIG. 16 (a) is a top view for demonstrating the position adjustment operation | movement of a holding member, FIG.16 (b) is the PP sectional view taken on FIG. .

In this embodiment, in the first reference example , the surfaces of the rising portions 3a and 3b of the fixed block 3 that are in contact with the frame 2 are formed as flat side walls, and the distance between them is the width of the frame 2 The wide arc portions 2c and 2d are formed in a size that allows light press-fitting. Further, the bottom portion that holds the frame 2 between the rising portions 3a and 3b is formed as a bottom wall 3f without opening, and the concave portion 3d at the upper end portion of the rising portion 3b is omitted. Other configurations are the same as those of the first reference example .

  In the present embodiment, first, the frame 2 to which the condenser lens 1 is bonded and fixed is arranged such that the arc portion 2d comes into contact with the bottom wall 3f of the fixed block 3 as shown in FIGS. 15 (a) and 15 (b). Is inserted between the rising portions 3a and 3b.

  Next, as shown in FIG. 15 (b), the tip of the jig 4 is inserted into the hole 2e of the frame 2, and the jig 4 is rotated in the direction of arrow a, as shown in FIG. 16 (b). Further, the arc portion 2c of the frame 2 is brought into contact with the rising portion 3b and the arc portion 2d is brought into contact with the rising portion 3a and the bottom wall 3f, so that the frame 2 is supported at three points and held in a light press-fit state.

  Thereafter, while the frame 2 is pressed toward the bottom wall 3f by the jig 4, the position of the condenser lens 1 is adjusted by moving in the optical axis direction indicated by the double arrow b.

  As described above, in the present embodiment, the opposing rising portions 3a and 3b that hold the frame 2 of the fixed block 3 have flat side walls and the bottom portion has the bottom wall 3f, so that the fixed block 3 can be easily processed. The cost can be further reduced as compared with the case of the first embodiment.

  It should be noted that the present invention is not limited to the above-described embodiment, and many variations or modifications can be made. The optical component held by the holding member is not limited to the condensing lens, the diffraction grating, and the wave plate described above, and the present invention can be applied effectively when holding other optical components.

It is a figure which shows the structure of the holding member of the optical component holding mechanism in the 1st reference example developed with this invention. It is a figure for demonstrating the insertion operation to the fixed block of the holding member in a 1st reference example . Similarly, it is a figure for demonstrating the position adjustment operation | movement of a holding member. It is a figure which shows the structure of the holding member of the optical component holding mechanism in 1st Embodiment of this invention. It is a figure for demonstrating the insertion operation | movement to the fixed block of the holding member in 1st Embodiment . Similarly, it is a figure for demonstrating the position adjustment operation | movement of a holding member. It is a figure which shows the structure of the holding member of the optical component holding mechanism in 2nd Embodiment of this invention. It is a figure for demonstrating the insertion operation to the fixed block of the holding member in 2nd Embodiment . Similarly, it is a figure for demonstrating the position adjustment operation | movement of a holding member. It is a figure for demonstrating the insertion operation | movement to the fixed block of the holding member by the optical component holding mechanism in 3rd Embodiment of this invention. Similarly, it is a figure for demonstrating the position adjustment operation | movement of a holding member. It is a figure which shows the structure of the holding member of the optical component holding mechanism in the 2nd reference example developed with this invention. It is a figure for demonstrating the insertion operation to the fixed block of the holding member in a 2nd reference example . Similarly, it is a figure for demonstrating the position adjustment operation | movement of a holding member. It is a figure for demonstrating the insertion operation to the fixed block of the holding member by the optical component holding mechanism in 4th Embodiment of this invention. Similarly, it is a figure for demonstrating the position adjustment operation | movement of a holding member. It is a figure for demonstrating the conventional optical component holding mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Condensing lens 2 Frame 2a, 2b Flat part 2c, 2d Arc part 2e Hole 2f Arc part 3 Fixed block 3a, 3b Standing part 3c Edge part 3d Recess 3e Opening 3f Bottom wall 4 Jig 5 Diffraction grating 6 Frame 6a, 6b Flat part 6c, 6d Arc part 6e Projection part 7 Fixed block 7a, 7b Standing part 7c Edge part 7d Concave part 7e Opening 11 Condensing lens 12 Wave plate 13 Frame 13a, 13b Flat part 13c, 13d Arc part 13e Projection part 13f For adjustment Groove 13g Protrusion 14 Fixed block 14a, 14b Rising portion 14c Edge portion 14d Recess 14e Adjustment groove 14f Opening 14g Vertical groove 14h Adjustment opening 15, 16 Jig

Claims (4)

In an optical component holding mechanism that holds a holding member that holds an optical component in a fixed block,
The holding member is formed with a portion having a different outer width in a direction perpendicular to the optical axis and a protrusion,
The fixing block is formed with a portion where the narrow outer width of the holding member is fitted, a portion where a portion with a large outer width is lightly press-fitted, and a recess where the protrusion is fitted,
After fitting the narrow portion of the holding member with the fixed block to the fixed block, the holding member is rotated about the optical axis to fit the protrusion into the recess, and the wide portion with the outer width. The optical component holding mechanism is configured such that the holding member is held in the fixed block by lightly press-fitting into the fixed block. In an optical component holding mechanism that holds a holding member that holds an optical component in a fixed block,
The holding member is formed with a portion having a different outer width in a direction perpendicular to the optical axis and a protrusion,
In the fixing block, a portion where a narrow outer width of the holding member is fitted, a portion where a wide outer width is lightly press-fitted, and a concave portion where the protrusion is engaged are formed.
After fitting the narrow portion of the holding member to the fixed block, the holding member is rotated about the optical axis to bring the protrusion into contact with the bottom of the recess, and An optical component holding mechanism configured to lightly press a wide portion into the fixed block and hold the holding member on the fixed block. In an optical component holding mechanism that holds a holding member that holds an optical component in a fixed block,
The holding member is formed with a portion having a different outer width in a direction perpendicular to the optical axis and a protrusion,
The fixing block communicates with a portion where the narrow portion of the holding member is fitted, a portion where a portion with a large outer width is lightly press-fitted, a groove portion with which the protrusion is engaged, and the groove portion. Forming an opening for adjustment,
After fitting the narrow portion of the holding member to the fixed block, the holding member is rotated about the optical axis to engage the protrusion with the groove, and the wide portion of the external width. Is lightly press-fitted into the fixing block, and in this state, a jig is passed through the adjustment opening, the position of the holding member in the rotation direction is adjusted by the jig through the protrusion, and the holding member is An optical component holding mechanism configured to be held by a fixed block. In an optical component holding mechanism that holds a holding member that holds an optical component in a fixed block,
The holding member is formed with a portion having a different outer width in a direction perpendicular to the optical axis,
The fixed block is formed with two opposing side walls into which the portion with the large outer width of the holding member is lightly press-fitted, and a bottom wall with which the portion with the large outer width abuts,
After the portion having the large outer width of the holding member is brought into contact with the bottom wall and the portion having the small outer width is inserted into the fixed block, the holding member is rotated about the optical axis, and the outer width is An optical component holding mechanism configured to hold the holding member on the fixing block by bringing a wide portion of the holding member into contact with the two side walls and the bottom wall.

Images