JP6360238B2 - Optical member - Google Patents

Description

  The present invention relates to an optical member.

  As a technique for attaching an aspherical mirror to a member to be attached with high precision at a predetermined position and posture, a part of the aspherical surface of the aspherical mirror is used as a reference surface, and the reference surface is reflected by reflection of light irradiated on the reference surface. A technique for measuring the inclination and setting the inclination to zero has been proposed (see Patent Document 1).

  Further, a technique has been proposed for an image projection apparatus having a holding structure in which the positional relationship between the projected image and the reflection surface is small even when the tilt of the reflective optical element is adjusted (see Patent Document 2).

JP 2007-328238 A (in particular, paragraphs “0001” and “0040”) JP2011-059459A (abstract)

  As described above, the optical member has been required to be accurate in the mutual positional relationship between constituent members such as an aspherical mirror which is one of the reflecting mirrors.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an optical member and a reflecting mirror that make it possible to make the positional relationship between constituent members accurate.

In order to achieve the above object, an optical member of the present invention is an optical member having a barrel that emits generated image light and a reflective mirror having a curved surface that reflects the image light, and is disposed opposite to the curved surface of the reflective mirror. And the fixed member to which the reflecting mirror fixed by the first mirror holding member is fixed, and the back side surface of the curved surface of the reflecting mirror are from a collimator for adjusting the mutual positional relationship between the lens barrel and the reflecting mirror. The fixed member has a reference surface for adjusting the mutual positional relationship between the lens barrel and the reflecting mirror, and the reference surface is provided on the side not facing the reflecting mirror; Two side end surfaces that are installed and fixed on the collimator stage and that connect the upper end surface and the lower end surface of the end surfaces surrounding the reflecting mirror are notched so as to open in the direction toward the lens barrel. Shaped engagement part Two projections arranged in through-holes respectively passing through a pair of opposed surfaces of the first mirror holding member that are opposed to the two side end surfaces, respectively, enter the groove-shaped engaging portion and form a groove shape the engaging portion engages, characterized by rotating operatively to Rukoto the reflection mirror as a rotation axis the axis connecting the two projections.

In order to achieve the above object, an optical member of the present invention has a lens barrel that emits generated image light and a reflecting mirror that has a curved surface that reflects the image light, and the lens barrel faces the curved surface of the reflecting mirror. In the optical member to be arranged, the back surface of the curved surface of the reflecting mirror fixed by the first mirror holding member has a plane that reflects the light emitted from the collimator for adjusting the mutual positional relationship between the lens barrel and the reflecting mirror. and, the lens barrel has a reference surface for mutual positional relationship adjustment between the lens barrel and the reflecting mirror, the reference surface is provided on a side not facing the reflecting mirror is installed and fixed to the stage of the collimator, further Of the end surfaces surrounding the reflecting mirror, two side end surfaces connecting the upper end surface and the lower end surface have groove-shaped engaging portions that are cut out so as to open in the direction toward the lens barrel side. Mirrors facing each side end face The two first engaged members disposed in the engaging holes penetrating the pair of opposing surfaces of the one holding member enter the groove-shaped engaging portion and engage with the groove-shaped engaging portion. , wherein the rotational operable to Rukoto the reflection mirror as a rotation axis the axis connecting the two first engaged member.

In order to achieve the above object, an optical member of the present invention has a lens barrel that emits generated image light and a reflecting mirror that has a curved surface that reflects the image light, and the lens barrel faces the curved surface of the reflecting mirror. In the optical member to be arranged, the back surface of the curved surface of the reflecting mirror fixed by the first mirror holding member has a plane that reflects the light emitted from the collimator for adjusting the mutual positional relationship between the lens barrel and the reflecting mirror. The lens barrel has a lens barrel reference surface for adjusting the mutual positional relationship between the lens barrel and the reflecting mirror. The lens barrel reference surface is provided on the side facing the reflecting mirror, and further surrounds the reflecting mirror. Of the end faces, the two side end faces that connect the upper end face and the lower end face have groove-like engaging portions that are notched so as to open in the direction toward the lens barrel side, and the two side end faces respectively. A pair of opposing surfaces of the first mirror holding member facing each other The two first engaged members disposed in the engaging holes that pass through each of them enter the groove-shaped engaging portion and engage with the groove-shaped engaging portion, and the two first engaged members the axis connecting member and said rotary operatively to Rukoto the reflection mirror as a rotation axis.

  Here, the plane and the optical axis of the lens barrel may be in a substantially vertical positional relationship.

  The plane may be capable of reflecting light.

  The flat surface may have a substantially parallel relationship with the reference surface or the lens barrel reference surface.

  Further, the plane and the reference surface or the lens barrel reference surface may be on the same optical axis.

  In the present invention, it is possible to provide an optical member and a reflecting mirror that make it possible to make the positional relationship between the constituent members accurate.

It is a disassembled perspective view of the optical member which concerns on the 1st Embodiment of this invention. It is the figure which looked at the disassembled perspective view shown in FIG. 1 from the paper surface back | inner side of FIG. It is AA sectional drawing in FIG. 2 of the state by which the fixing part of the 2nd mirror holding member and mirror fixing | fixed part which comprise the optical member which concerns on the 1st Embodiment of this invention was carried out. It is a schematic diagram which shows the detail of the reflective mirror which comprises the optical member which concerns on the 1st Embodiment of this invention, and a 1st mirror holding member, and is a rear view of a reflective mirror, and its BB sectional drawing. It is a figure which shows the detail of the mirror holding member fixing | fixed part which comprises the optical member which concerns on the 1st Embodiment of this invention, and is the back view seen from the back side of a reflective mirror, and the schematic diagram of the CC sectional drawing . It is a schematic diagram of the collimator used when adjusting the positional relationship between each structural member of the optical member which concerns on the 1st Embodiment of this invention, and the optical member which concerns on the 2nd Embodiment of this invention mentioned later. . It is a longitudinal cross-sectional schematic diagram in the longitudinal direction in FIG. 1 of a lens-barrel, and is a figure which shows the attachment state of a reflective mirror. It is a disassembled perspective view of the optical member which concerns on the 2nd Embodiment of this invention. It is the figure which changed the exploded perspective view shown in FIG. 8 slightly, and was seen from the paper surface back side of FIG. It is the disassembled perspective view of a reflective mirror and a mirror holding member, and is the figure seen from the side where the curved surface of a reflective mirror can be seen. It is the figure seen from the paper surface back side of FIG. It is a schematic diagram which shows the detail of a reflective mirror and a mirror 1st holding member, and is a rear view of a reflective mirror and a mirror 1st holding member, The part of a reflective mirror among the DD sectional drawings, and protrusion of a mirror 1st holding member It is the figure which extracted only the part. It is a schematic diagram which shows the detail of a reflective mirror and a mirror 1st holding member, and is a front view of a reflective mirror and a mirror 1st holding member, and the projection of the mirror mirror part and protrusion of a mirror 1st holding member among the EE sectional drawings It is the figure which extracted only the part. FIG. 6 is an exploded perspective view of a mirror and a mirror second holding member in which a reflection mirror and a mirror first holding member are combined. It is the figure seen from the paper surface back side of FIG. FIG. 5 is an exploded perspective view of a combination of a reflection mirror, a mirror first holding member, and a mirror second holding member, and an adjustment screw for adjusting the positional relationship between the mirror first holding member and the mirror second holding member. It is the figure seen from the paper surface back side of FIG. In FIG. 16, it is a FF cross-sectional schematic diagram when the adjustment screw is inserted into the hole. FIG. 4 is an exploded perspective view of a fixed member and a member in which a reflection mirror, a mirror first holding member, and a mirror second holding member are combined. It is the figure seen from the paper surface back side of FIG. It is a GG cross-sectional schematic diagram of what combined the reflective mirror, the mirror 1st holding member, the mirror 2nd holding member, and the fixing member in FIG.

  Hereinafter, an optical member and a reflection mirror according to embodiments of the present invention will be described with reference to the drawings.

(Configuration of optical member and reflection mirror according to first embodiment of the present invention)
FIG. 1 is an exploded perspective view of an optical member 1 according to the first embodiment of the present invention. 2 is an exploded perspective view of FIG. 1 as viewed from the back side of FIG.

  The optical member 1 has a lens barrel 10 that emits image light generated by an imaging device or a personal computer. The lens barrel 10 has two lens barrel fixed portions 12 and 12 protruding in a plate shape from the outer peripheral surface 11 at positions 180 degrees apart from each other in the circumferential direction of the outer peripheral surface 1. Two lens barrel fixing holes 13, 13, 14, and 14 are formed in the lens barrel fixed portions 12 and 12, respectively. Between the two lens barrel fixing holes 13, 13, 14, 14, projections 15, 15 projecting downward in FIGS. 1 and 2 are formed. Here, the lower surface of FIGS. 1 and 2 of the lens barrel fixing portions 12 and 12 is referred to as a lens barrel mounting surface 16 and 16. Further, there are screws 17, 17, 17, and 17 that penetrate the two lens barrel fixing holes 13, 13, 14, and 14 from the upper side to the lower side in FIGS.

  The optical member 1 also includes a reflection mirror 20 that reflects and enlarges the image light emitted from the lens barrel 10. The reflection mirror 20 has a curved surface 21 that is a concave surface and a flat surface 22 on the back side thereof. The curved surface 21 is a paraboloid obtained by rotating a parabola around its axis of symmetry. The plane 22 is a plane substantially perpendicular to the symmetry axis. The plane 22 is used for adjusting the mutual positional relationship between the lens barrel 10, a fixing member described later, and the reflection mirror 20. The plane 22 and the optical axis L of the lens barrel 10 are in a substantially vertical positional relationship. A method for this positional relationship will be described later. Further, the flat surface 22 is the optical axis of the reflecting mirror 20 that passes through the innermost part of the curved surface 21 (for example, the portion corresponding to the apex of the parabola when a parabolic surface is used) (after being assembled as the optical member 1). Is perpendicular to the optical axis L).

  End surfaces (upper end surface 23, lower end surface 24, side end surfaces 25, 26) other than the curved surface 21 and the flat surface 22 of the reflection mirror 20 are surrounded by a first mirror holding member 27 and a second mirror holding member 28. The upper end surface 23 of the reflection mirror 20 is formed with a recess 29 whose center is recessed. The first mirror holding member 27 and the second mirror holding member 28 hold the reflection mirror 20 and play a role of fixing the reflection mirror 20 to a holding member described later. The upper end surface 23 and the lower end surface 24 have projecting portions 23a (not shown in FIGS. 1 and 2) and 24a projecting therefrom. Details of the structure of the first mirror holding member 27 and the second mirror holding member 28 and the holding mechanism will be described later.

  The optical member 1 has a fixing member 30 that fixes the lens barrel 10 and the reflecting mirror 20. The fixing member 30 has a shape in which a lens barrel fixing portion 31 and a mirror fixing portion 32 are integrated in a longitudinal direction of the fixing member 30. The lens barrel fixing portion 31 has two lens barrel installation surfaces 33 and 33 that are in contact with the lens barrel mounting surfaces 16 and 16 at both ends of the lens barrel fixing portion 31 in a direction orthogonal to the longitudinal direction. The lens barrel installation surfaces 16 and 16 of the two lens barrel fixing portions 12 and 12 described above are in contact with the lens barrel installation surfaces 33 and 33, respectively. The lens barrel mounting surfaces 33 and 33 have two lens barrel fixing holes 13, 13, 14, and 14, and lens barrel fixing holes that can face the projections 15 and 15 formed therebetween, respectively. 34, 34, 35, 35 and lens barrel adjustment holes 36, 36 are formed.

  To fix the lens barrel 10 and the fixing member 30, first, the projections 15 and 15 are inserted into the lens barrel adjusting holes 36 and 36, respectively. Then, a slight gap is formed between the projections 15 and 15 and the lens barrel adjustment holes 36 and 36. Within the gap, the positional relationship between the projections 15 and 15 and the lens barrel adjustment holes 36 and 36 is adjusted. Then, the space of the two lens barrel fixing holes 13, 13, 14, and 14 and the space of the lens barrel fixing holes 34, 34, 35, and 35 are overlapped. Then, the screw threads of the screws 17, 17, 17, 17 and the screw grooves of the lens barrel fixing holes 34, 34, 35, 35 are screwed together and tightened with a screw force to fix the lens barrel 10 and the fixing member 30. To do. Here, details of the adjustment of the positional relationship will be described later.

  The reflection mirror 20 and the fixing member 30 are fixed by fixing the second mirror holding member 28 and the mirror fixing portion 32. 3 is a cross-sectional view taken along line AA in FIG. 2 in a state where the second mirror holding member 28 and the mirror fixing portion 32 are fixed. The rib 40 erected from the second mirror holding member 28 in the direction of the lens barrel 10 has two holes 41 and 41 formed at both ends thereof. The mirror fixing portion 32 is formed with two pedestal portions 42 and 42 and mirror ground surfaces 44 and 44 on the upper surface thereof at positions adjacent to the lens barrel fixing portion 31 at both ends in a direction orthogonal to the longitudinal direction. Yes. The pedestal portions 42 and 42 have hollow portions 43 and 43. Circular mirror fixing holes 45, 45 are formed in the mirror ground surfaces 44, 44, and connect the upper portions of the mirror ground surfaces 44, 44 and the hollow portions of the pedestals 42, 42.

  The holes 41 and 41 and the mirror fixing holes 45 and 45 can be overlapped with each other. The lower surface of the rib 40 is in contact with the mirror ground planes 44, 44, the holes 41, 41 and the mirror fixing holes 45, 45 are overlapped, and the screws 48, 48 are connected to the mirror fixing holes via the springs 47, 47. 45, 45 is inserted from the lower side of FIGS. In this state, the screws 48 and 48 are tightened with washers and nuts 49 and 49 in the upper direction of the mirror fixing holes 45 and 45 in FIGS. In this way, the second mirror holding member 28 and the mirror fixing portion 32 are fixed.

  Before or after the tightening of the screws 48, 48 and the washer nuts 49, 49, or at the same time, both ends in the direction perpendicular to the longitudinal direction of the fixing member 30 shown in FIG. The mirror fixing holes 50 and 51 provided at the farthest positions and the second mirror holding member 28 are fixed. Therefore, the space of the grooves 52 and 52 formed in the portion of the second mirror holding member 28 located on the flat surface 22 side with respect to the curved surface 21 and the lower end surface 24 side with respect to the upper end surface 23 is fixed to the mirror. It overlaps with the space of the holes 50 and 51 for use. The superposition is realized when both are arranged so that the second mirror holding member 28 is accommodated in the mirror fixing portion 32. The shaft member 53 is inserted into both the groove portions 52 and 52 and the mirror fixing hole portions 50 and 51. A handle member 54 is attached to one end of the shaft member 53 from the outside of the fixed member 30. Further, since the other end 55 of the shaft member 53 is threaded, and the mirror fixing hole 51 has a screw hole at the same time, the other end 55 of the shaft member 53 is rotated to the mirror fixing hole by rotating the handle member 54. Screwed to the part 51. As described above, the reflecting mirror 20 and the second mirror holding member 28 are also fixed by the shaft member 53.

  How the reflection mirror 20 is held by the first mirror holding member 27 will be described. As shown in FIG. 2, the first mirror holding member 27 has through holes 61 and 61 that penetrate through the plate portions facing the side end surfaces 25 and 26. Further, cylindrical projections 62 and 62 that are fixed through the through holes 61 and 61 protrude toward the reflection mirror 20. Groove-shaped engaging portions 63 and 63 are formed on the curved surface 21 side of the side end surfaces 25 and 26 of the reflecting mirror 20, and the protrusions 62 and 62 enter the engaging portions 63 and 63. Thus, the reflection mirror 20 is held by the first mirror holding member 27. However, with only this holding, there is room for the reflecting mirror 20 to rotate about the axis connecting the protrusions 62 and 62 as the rotation axis.

  FIG. 4 is a schematic view showing details of the reflection mirror 20 and the first mirror holding member 27, and is a rear view of the reflection mirror 20 and a cross-sectional view taken along line BB. A hole portion 65 that can be inserted in the longitudinal direction in FIGS. 1 and 2 is formed in the protruding portion 24 a protruding from the lower end surface 24 of the reflecting mirror 20. A protrusion 66 (not shown in FIGS. 1 and 2) is formed at a position that extends from the first mirror holding member 27 and faces the protrusion 24a. The protrusion 66 is formed with a hole 67 that overlaps the hole 65 of the protrusion 24a.

  A space 68 is provided between the protrusion 66 and the protrusion 24 a, and a coil spring 69 is inserted into the space 68. The distance between the protrusion 24 a and the protrusion 66 is adjusted by the screw force of the screw 70 that passes through both the hole 65 and the hole 67 through the coil spring 69 and the elastic force of the coil spring 69. Here, the screw 70 has a thread groove that matches a screw thread formed on the inner wall surface of the hole 67, and the distance between the protruding portion 24 a and the protruding portion 66 changes by rotating the screw 70. It is configured as follows. This distance is configured to increase the urging force of the coil spring 69 by decreasing the distance and to decrease the urging force of the coil spring 69 by increasing the distance.

  Further, the protruding portion 23a protruding from the upper end surface 23 of the reflecting mirror 20 is a groove-shaped portion 71 (see FIGS. 1 and 5) formed in a portion of the first mirror holding member 27 facing the upper end surface 23 of the reflecting mirror 20. (Also described in 2)). The projection 23 a is pressed against the inner wall of the groove 71 by the leaf spring 72 arranged on the flat surface 22 side of the first mirror holding member 27 and on the groove 71. .

  By fixing the projection 23a of the reflection mirror 20 to the first mirror holding member 27 by the leaf spring 72 and adjusting the position of the projection 24a of the reflection mirror 20 shown in FIG. The room in which the reflection mirror 20 rotates is limited with the connecting axis as the rotation axis.

  However, there is a possibility that misalignment occurs due to the rotation of the reflection mirror 20, which is the axis connecting the upper end surface 23 and the lower end surface 24 of the reflection mirror 20, and the vertical axis in FIGS. is there. Therefore, the details of the adjustment mechanism for the positional deviation based on the rotation of the reflection mirror 20 about the rotation axis P will be described.

  The adjustment of the positional deviation based on the rotation of the reflection mirror 20 about the rotation axis P is performed by the first mirror holding member 27 and the second mirror holding member 28 on the side end surfaces 25 and 26 side of the reflection mirror 20 shown in FIGS. This is done by mirror holding member fixing portions 81 and 81.

  FIG. 5 is a diagram showing details of the mirror holding member fixing portions 81, 81, and is a schematic diagram of a rear view seen from the rear side of the reflection mirror 20 and a CC sectional view thereof. In the mirror holding member fixing portions 81, 81, projections 82, 82, 83, 83 protruding from both the first mirror holding member 27 and the second mirror holding member 28 are overlapped one by one. In the superposed state, the holes 84, 84, 85, 85 formed in the protrusions 82, 82, 83, 83 are also superposed.

  As can be seen from the CC cross-sectional view of the protrusions 82, 82, 83, 83 shown in FIG. 5, a space 86 is provided between the protrusion 82 and the protrusion 83, and a coil spring is provided in the space 86. 87 is inserted. The distance between the protrusion 82 and the protrusion 83 is adjusted by the screw force of the screw 88 that passes through both the hole 84 and the hole 85 via the coil spring 87 and the elastic force of the coil spring 87. Here, the screw 88 has a screw groove that matches a screw thread formed on the inner wall surface of the hole 85, and the distance between the protrusion 82 and the protrusion 83 changes by rotating the screw 88. It is configured as follows. This distance is configured to increase the urging force of the coil spring 87 by decreasing the distance and to decrease the urging force of the coil spring 87 by increasing the distance.

(Adjustment of the positional relationship between the constituent members of the optical member 1 according to the first embodiment)
FIG. 6 is a schematic diagram of a collimator 89 used when adjusting the positional relationship between the optical member 1 and the constituent members of the optical member according to a second embodiment to be described later.

  First, the position and angle of the stage 89a of the collimator 89 for installing the various members shown in FIG. 6 and the light source unit 89b of the collimator 89 that emits inspection light fixed above the stage 89a are adjusted. Adjustment is performed by 89c so that the optical axis La of the light emitted from the light source unit 89b and the upper surface 89d of the stage 89b are substantially perpendicular.

  After that, among the fixing members 30 shown in FIG. 2, the reference surface 90 (the flat surface portion of the fixing member 30) at the position of the lens barrel fixing portion 31 farthest from the mirror fixing portion 32 in the longitudinal direction is used as the fixing member 30. When the lens barrel 10 and the reflecting plate 92 are installed, the lens barrel reference surface 91 (more precisely, the reflecting plate 92) of the lens barrel 10 and the flat surface 22 of the reflecting mirror 20 transmit light emitted from the light source unit 89b. The position of the fixing member 30 is adjusted so as to be on the optical axis La, and is installed and fixed on the upper surface 89d of the stage 89a. At this time, the reference surface 90 of the fixing member 30 installed and fixed on the upper surface 89d is substantially parallel to the upper surface 89d.

  Then, in a state where the positional relationship between the collimator 89 and the reference plane 90 is left as it is, light is emitted from the collimator 89 toward the plane 22 of the reflection mirror 20, and the reference plane 90 and the plane 22 are reflected by the reflected light. Are substantially parallel. When the reference plane 90 and the plane 22 are not substantially parallel, the screw 70 shown in FIG. 4 and the screw 88 shown in FIG. 5 are used to adjust until they are substantially parallel.

  Next, with the positional relationship between the collimator 89 and the reference surface 90 as it is, the reflecting plate 92 is fixed to the lens barrel reference surface 91 of the lens barrel 10 facing the reflecting mirror 20 as shown in FIG. FIG. 7 is a schematic longitudinal sectional view of the lens barrel 10 in the longitudinal direction in FIG. 1, and shows a state in which the reflecting plate 92 is attached. The outline of the tip of the lens barrel 10 protrudes. The protruding front end surface serves as a lens barrel reference surface 91. The reflection plate 92 has a reflection surface 93 perpendicular to the optical axis L of the lens barrel 10 when attached to the lens barrel reference surface 91. The reflecting surface 93 has a substantially vertical positional relationship with the optical axis L of the lens barrel 10. Therefore, when the reflecting plate 92 is fixed so as to be in contact with the lens barrel reference surface 91, the reflecting surface 93 of the reflecting plate 92 has a positional relationship substantially perpendicular to the optical axis L.

  In this state, light is emitted from the collimator 89 toward the reflection surface 93 of the reflection plate 92, and it is confirmed whether the reference surface 90 and the reflection surface 93 are substantially parallel by the reflected light. When the reference surface 90 and the reflecting surface 93 are not substantially parallel, the protrusion 15 and the mirror are within a slight gap when the protrusion 15 of the lens barrel 10 is inserted into the lens barrel adjusting hole 36. The positional relationship of the cylinder adjusting hole 36 is adjusted so that the reference surface 90 and the reflecting surface 93 are substantially parallel.

  Here, the term “substantially parallel” includes both the case of being completely parallel and the case of being substantially parallel allowing an angle shift of 15 minutes or less, 10 minutes or less, or 5 minutes or less. In addition, the term “substantially vertical” includes both the case of being completely vertical and the case of being substantially vertical allowing an angle shift of 15 minutes or less, 10 minutes or less, or 5 minutes or less.

  As described above, the positional relationship between the constituent members of the optical member 1 according to the first embodiment is adjusted. When this optical member 1 is attached to the main body of an optical device such as a projector that projects an enlarged display screen of a personal computer, the optical member 1 is attached based on the reference surface of the fixing member 30, so that the positional relationship between the constituent members of the optical device is increased. Be accurate. In the above case, the positional relationship between the fixing member 30 and the reflecting mirror 20 is first adjusted, and then the positional relationship between the fixing member 30 and the lens barrel 10 is adjusted. good.

(Configuration of optical member and reflection mirror according to second embodiment of the present invention)
FIG. 8 is an exploded perspective view of the optical member 100 according to the second embodiment of the present invention. FIG. 9 is a diagram in which the exploded perspective view shown in FIG. 8 is slightly changed and is viewed from the back side of FIG.

  Similar to the optical member 1, the optical member 100 includes a lens barrel 101 that emits image light generated by an imaging device or a personal computer. The lens barrel 101 has two lens barrel fixed portions 103 and 103 projecting in a plate shape from the outer peripheral portion 102 at positions 180 degrees apart in the circumferential direction of the outer peripheral surface 1. Two lens barrel fixing holes 104 and 105 are formed in the lens barrel fixed portions 103 and 103, respectively. Between the lens barrel fixing holes 104 and 105 of the single lens barrel fixed portion 103, a lens barrel installation hole 106 into which a protrusion on the fixing member side described later is fitted is formed. Here, the upper surface in FIGS. 8 and 9 of the lens barrel fixed portions 103 and 103 is referred to as a lens barrel installation surface 107 and 107.

  The optical member 100 includes a reflection mirror 110 that reflects and enlarges the image light emitted from the lens barrel 101. The reflection mirror 110 has a curved surface 111 that is a concave surface and a flat surface 112 on the back side thereof. The curved surface 111 is a paraboloid obtained by rotating a parabola around its axis of symmetry. The plane 112 is a plane substantially perpendicular to the symmetry axis. The plane 112 is used for adjusting the mutual positional relationship between the lens barrel 101, a fixing member described later, and the reflection mirror 110. In addition, the plane 112 and the optical axis L ′ of the lens barrel 101 are in a substantially vertical positional relationship. Further, the flat surface 112 is the optical axis of the reflecting mirror 110 that passes through the innermost part of the curved surface 111 (for example, the portion corresponding to the apex of the parabola when a parabolic surface is used) (after being assembled as the optical member 100). Is perpendicular to the optical axis L ′.

  The reflection mirror 110 is held by a mirror first holding member 113 and a mirror second holding member 114. The mirror first holding member 113 and the mirror second holding member 114 have a role of fixing the reflecting mirror 110 to a fixing member described later. Details of the holding mechanism of the mirror first holding member 113 and the mirror second holding member 114 will be described later.

  The optical member 100 includes a fixing member 120 that fixes the lens barrel 101 and the reflecting mirror 110. The fixing member 120 has a shape in which a lens barrel fixing portion 121 and a mirror fixing portion 122 are divided in the longitudinal direction of the fixing member 120 and integrated. The lens barrel fixing portion 121 is shaped like a cylinder cut in half in the length direction. At the cut surfaces (two upper surfaces in FIGS. 8 and 9) and farthest from the reflecting mirror 110, the lens barrel engaging portion 123, which is engaged with the lens barrel fixed portions 103, 103 described above, 123 is formed.

  The lens barrel engaging portions 123 and 123 have lens barrel installation surfaces 125 and 125 that face the lens barrel grounded surfaces 107 and 107 with the metal plates 124 and 124 interposed therebetween. The lens barrel grounding surfaces 125 and 125 are fitted into mounting screw holes 126, 126, 127, and 127 that overlap the lens barrel fixing holes 104, 104, 105, and 105, respectively, and the lens barrel installation holes 106 and 106. The lens barrel installation projections 128 and 128 to be inserted are formed. The metal plates 124 and 124 are formed with holes that overlap the mounting screw holes 126, 126, 127, and 127 and through which the lens barrel installation protrusions 128 and 128 pass. 9 is a diagram in which the metal plates 124 and 124 are lifted to the upper side of FIG. 9 from the state of FIG.

  To fix the lens barrel 101 and the fixing member 120, first, the lens barrel installation protrusions 128 and 128 are inserted into the lens barrel installation holes 106 and 106 through the central holes of the metal plates 124 and 124, respectively. Then, a slight gap is formed between the lens barrel installation protrusions 128 and 128 and the lens barrel installation holes 106 and 106. Within this gap, the positional relationship between the lens barrel installation projections 128 and 128 and the lens barrel adjustment holes 106 and 106 is adjusted. Then, the two lens barrel fixing holes 104, 104, 105, 105 and the mounting screw holes 126, 126, 127, 127 are overlapped. Then, screws (not shown) from the lens barrel fixing holes 104, 104, 105, 105 to the screw holes 126, 126, 127, 127 that fit the screw grooves through the holes at both ends of the metal plates 124, 124. ) Is inserted. Then, the lens barrel 101 and the fixing member 120 are fixed by tightening and screwing with the screw force. Note that details of the above-described positional relationship adjustment will be described later.

  FIG. 10 is an exploded perspective view of the reflection mirror 110 and the first mirror holding member 113, as viewed from the side where the curved surface 111 of the reflection mirror 110 is visible. FIG. 11 is a view as seen from the back side of the sheet of FIG. 10 and 11, the direction parallel to the optical axis L ′ in FIGS. 8 and 9 is the Z-axis direction, and the vertical direction (gravity direction) in FIGS. 10 and 11 is the Y-axis direction. A direction orthogonal to the axial direction and the Y-axis direction is referred to as an X-axis direction.

  The upper end surface 130 of the reflecting mirror 110 is formed with a hollow recess 131 and has an upper protrusion 132 protruding from the recess 131 upward in FIGS. 10 and 11 in a cylindrical shape. In addition, the reflection mirror 110 has a lower protrusion 134 protruding from the lower end surface 133 on the lower side of FIGS. A hole 135 that penetrates in the Z-axis direction is formed in the lower protrusion 134. Further, the side end surfaces 136 and 137 of the reflecting mirror 110 have engaging portions 138 and 138 partially cut out on the curved surface 111 side and on the upper side of FIGS.

  The mirror first holding member 113 has a frame shape as a whole. The upper side of the mirror first holding member 113 in FIG. 11 is a storage portion 141 that stores the upper end surface 130 side of the reflection mirror 110. Further, a position adjusting groove 142 is formed at the center in the X-axis direction in FIG. Further, ribs 143 and 143 projecting in the Z-axis direction are formed at both ends on the near side in FIG. 10 of the accommodating portion 141, and the engaging holes 144 and 144 penetrating the ribs 143 and 143 in the X-axis direction. Is formed. Further, the first mirror holding member 113 is formed with a projection 146 that protrudes in a rectangular column shape from the lower end surface 145 to the lower side in the Y-axis direction, and the projection 145 has a hole 147 that penetrates in the Z-axis direction. Has been. The hole portion 147 has a counterbore shape that is a screw hole shape with a narrow opening toward the lens barrel 101 in the Z-axis direction, although it is difficult to understand in the drawing.

  When the upper portion of the reflecting mirror 110 is relatively moved in the direction (Z-axis direction) in which the upper portion of the reflecting mirror 110 is accommodated in the accommodating portion 141 of the mirror first holding member 113, the upper protrusion 132 enters the position adjusting groove 142, and the engaging portions 138, The space of 138 and the space of the engagement holes 144 and 144 overlap, and the space of the hole 135 and the space of the hole 147 overlap.

  The plate spring 151 is installed so that the upper projection 132 is pressed against the position adjustment groove 142 by the plate spring 151 so that the upper projection 132 enters the position adjustment groove 142. At the time of installation, the holes 152, 152 at both upper ends of the leaf spring 151 are fitted into the protrusions 153, 153 on both sides of the position adjusting groove 142. Then, the space of the hole portions 154, 154 of the leaf spring 151 and the space of the hole portions 155, 155 on both sides of the position adjusting groove portion 142 overlap, and the pins 156, 156 are inserted into the both hole portions 153, 155, The leaf spring 151 is fixed to the position adjusting groove 142. Therefore, the leaf spring 151 suppresses the reflection mirror 110 from falling off the mirror first holding member 113 and rattling in the Z-axis direction.

  Further, the space of the engaging portions 138 and 138 and the space of the engaging hole portions 144 and 144 are overlapped. And in the surface which rib 143,143 opposes, ie, in accommodating part 141, one projection part 161a, 161a inside the X-axis direction of the pin-shaped member which is the 1st engaged member 161,161 is an engaging part. 138 and 138. The first engaged members 161 and 161 include disc-shaped bowl-shaped portions 161c and 161c, protrusions 161a and 161a formed at the center of one surface, and a protrusion 161b formed at the center of the opposite surface. 161b.

  At the time of the insertion, the spring washer 162 is pressed and disposed in one or both of the gaps around the engaging portions 138 and 138 and the engaging hole portions 144 and 144. Then, when the spring washer 162 is released, the other protrusions 161b and 161b of the first engaged members 161 and 161 move the engaging holes 144 and 144 to the outside of the opposing surfaces of the ribs 143 and 143, respectively. It penetrates and engages with the engaging holes 144 and 144. The spring washer 162 exerts an urging force that presses and fixes the flanges 161c and 161c of the first engaged members 161 and 161 and the inner wall of the accommodating portion 141 (periphery of the engaging hole portions 144 and 144). The backlash of the reflection mirror 110 in the X-axis direction is suppressed.

  Further, leaf spring fixing members 163 and 163 are arranged at both ends in the X-axis direction on the upper surface of the first mirror holding member 113. Of the three holes respectively provided in the second leaf springs 164 and 164, the both end holes 165, 165, 165 and 165 are inserted into the both end protrusions 166, 166, 166 and 166 of the leaf spring fixing members 163 and 163. To do. In this state, of the three holes provided in the second leaf springs 164 and 164, the space between the central holes 167 and 167 and the hole portion 168 between the both end protrusions 166 and 166 of the leaf spring fixing members 163 and 163, respectively. , 168 overlap, the pins 169 and 169 are inserted and fixed so as to penetrate the space downward in the Y-axis direction. Then, the distal ends 170 and 170 press the upper end surface 130 of the reflecting mirror 110 by the urging force of the second leaf springs 164 and 164. Therefore, the second leaf springs 164 and 164 suppress backlash of the reflection mirror 110 in the Y-axis direction.

  Here, the upper portion of the mirror first holding member 113 and the reflection mirror 110 is fixed by the biasing force of the spring washer 162, the leaf spring 151, and the second leaf springs 164, 164. However, with these alone, there is room for the reflection mirror 110 to rotate about the X axis connecting the two first engaged members 161 and 161 as the rotation axis.

  When the upper part of the reflection mirror 110 is relatively moved in the direction (Z-axis direction) in which the upper part of the mirror first holding member 113 is accommodated, the space of the hole 135 and the space of the hole 147 are overlapped. A coiled compression spring 171 is disposed in the space between the hole 135 and the hole 147. The adjusting screw 172 is disposed so as to pass through the inner space of the hole 135, the hole 147, and the compression spring 171. Then, the adjustment screw 172 and the hole 147 are screwed together, and the lower projection 134 of the reflection mirror 110 and the projection 146 of the mirror first holding member 113 are fixed. The lower part of the reflecting mirror 110 and the mirror first holding member 113 are fixed by the urging force of the compression spring 171, and the reflecting mirror with the axis connecting the two first engaged members 161, 161 described above as the rotation axis The rotation of 110 is suppressed.

  Adjustment of the positional relationship between the reflection mirror 110 and the first mirror holding member 113 will be described with reference to FIGS. 12 and 13. FIG. 12 is a schematic diagram showing details of the reflecting mirror 110 and the first mirror holding member 113. The rear view of the reflecting mirror 110 and the first mirror holding member 113, and the reflecting mirror 110 and DD among the DD cross-sectional views thereof. It is the figure which extracted only the part of the projection part 146 of the mirror 1st holding member 113. FIG. FIG. 13 is a schematic diagram showing details of the reflecting mirror 110 and the first mirror holding member 113. FIG. 13 is a front view of the reflecting mirror 110 and the first mirror holding member 113, and of the EE cross-sectional view of the reflecting mirror 110. It is the figure which extracted only the projection part 146 of the part and the mirror 1st holding member 113. FIG.

  The hole 135 of the lower protrusion 134 protruding from the lower end surface 133 of the reflection mirror 110 and the hole 147 of the protrusion 146 extending from the mirror first holding member 113 are opposed to each other. A space 181 is provided between the lower protrusion 134 and the protrusion 146, and a compression spring 171 is inserted into the space 181. The distance between the lower protrusion 134 and the protrusion 146 is adjusted by the screw force of the adjusting screw 172 that passes through both the hole 135 and the hole 147 through the compression spring 171 and the elastic force of the compression spring 171. .

  Here, the adjustment screw 172 has a thread groove that matches a screw thread formed on the inner wall surface of the hole 147, and the lower protrusion 134 and the protrusion are rotated by rotating the adjustment screw 172. The distance 146 is configured to change. This distance is configured to increase the urging force of the compression spring 171 by decreasing the distance and to decrease the urging force of the compression spring 171 by increasing the distance.

  FIG. 14 is an exploded perspective view of the reflecting mirror 110 and the mirror first holding member 113 combined with each other and the mirror second holding member 114, and FIG. 15 is a view as seen from the back side of FIG. .

  The overall shape of the mirror second holding member 114 has a substantially boomerang shape. On both ends in the length direction of the upper portion of the first mirror holding member 113, depressed portions 191 and 191 are formed. The recessed portions 191 and 191 are formed with holes 192 and 192 that penetrate the recessed bottom surface. Screw hole portions 193 and 193 for fixing to the mirror first holding member 113 are formed at both ends in the length direction of the mirror second holding member 114 and at a position farthest from the lens barrel 101 on the upper side surface. Yes.

  The first mirror holding member 113 and the second mirror holding member 114 are fixed by fixing screws 194 and 194 through the holes 192 and 192 and inserted into the screw holes 193 and 193 and screwed together. . Spring washers 195 and 195 and washers 196 and 196 are arranged between the fixing screws 194 and 194 and the holes 192 and 192, and between the holes 192 and 192 and the screw holes 193 and 193, Washers 197 and 197 are arranged. These longitudinal sectional views are shown in FIG.

  FIG. 16 shows an adjustment screw that adjusts the positional relationship between the reflecting mirror 110, the mirror first holding member 113, and the mirror second holding member 114, and the mirror first holding member 113 and the mirror second holding member 114. FIG. 17 is an exploded perspective view of 201 and 201, and FIG. 17 is a view as seen from the back side of FIG. FIG. 18 is a schematic cross-sectional view taken along the line F-F when the adjusting screws 201 and 201 are inserted into the holes 202 and 202 in FIG. 16.

  When the adjusting screws 201 and 201 are inserted into the holes 202 and 202, the positional deviation based on the rotation of the reflecting mirror 110 with the vertical axis in FIG. 16 as the rotation axis P 'can be adjusted. As shown in FIG. 18, the adjusting screw 201 is inserted into the hole 202 and further inserted into the screw hole 203 (also described in FIG. 15) of the mirror second holding member 114 where the space overlaps the hole 202. A space 204 is formed between the hole 202 and the screw hole 203, and a compression spring 205 is disposed in the space 204.

  The distance between the mirror first holding member 113 and the mirror second holding member 114 is determined by the screw force of the adjusting screw 201 that passes through both the hole 202 and the screw hole 203 through the compression spring 205 and the elastic force of the compression spring 205. It has been adjusted.

  Here, the adjustment screw 201 has a screw groove that matches a screw thread formed on the inner wall surface of the screw hole 203. By rotating the adjustment screw 201, the first mirror holding member 113 and the mirror are rotated. The distance of the second holding member 114 is configured to change. This distance is configured to increase the urging force of the compression spring 205 by decreasing the distance, and to decrease the urging force of the compression spring 205 by increasing the distance.

  FIG. 19 is an exploded perspective view of the reflecting mirror 110, the mirror first holding member 113, and the mirror second holding member 114 combined with each other, and the fixing member 120. FIG. 20 is a perspective view of FIG. It is a figure. FIG. 21 is a schematic cross-sectional view taken along the line GG of FIG. 19 in which the reflecting mirror 110, the mirror first holding member 113, the mirror second holding member 114, and the fixing member 120 are combined.

  Hole portions 213 and 213 are formed in the bottom surfaces 212 and 212 of the corner portions 211 and 211 between the recessed portions 191 and 191 of the mirror first holding member 113 and the ribs 143 and 143. From above the bottom surfaces 212 and 212, fixing screws 214 and 214 pass through the spring washers 215 and 215 and washers 216 and 216, pass through the holes 213 and 213, and further pass through the washers 217 and 217 for fixing. The screw holes 218 and 218 are screwed together. The mirror second holding member 114 and the fixing member 120 are fixed by the screwing.

  Further, side plates 219 and 219 extending from the bottom surfaces 212 and 212 to the lower side of FIGS. 19 and 20 are for adjusting the position of the mirror second holding member 114 and the fixing member 120 in the X-axis direction in FIG. Screw holes 220, 220 are formed. When the position adjusting screws 221 and 221 are inserted into the screw holes 220 and 220 while being screwed together, they hit the walls 222 and 222 of the fixing member 120. If the position adjusting screws 221 and 221 are further inserted after the collision, the distance in the X-axis direction between the mirror second holding member 114 and the fixing member 120 can be adjusted.

(Adjustment of the positional relationship between the constituent members of the optical member 100 according to the second embodiment)
First, the position and angle of the stage 89a of the collimator 89 for installing the various members shown in FIG. 6 and the light source unit 89b of the collimator 89 that emits inspection light fixed above the stage 89a are adjusted. Adjustment is performed by 89c so that the optical axis La of the light emitted from the light source unit 89b and the upper surface 89d of the stage 89b are substantially perpendicular.

  After that, when the reference surface 230 (see FIG. 8) of the lens barrel 101 is installed, the lens barrel reference surface 234 (see FIG. 9, a member corresponding to a reflection mirror 93 to be described later) and the reflection mirror of the lens barrel 101 are installed. The flat surface 112 of 110 is on the optical axis La of the light emitted from the light source unit 89b. The position of the lens barrel 101 is adjusted and installed and fixed on the upper surface 89d of the stage 89a. At this time, the reference surface 230 of the lens barrel 101 installed and fixed on the stage 89a is substantially parallel to the upper surface 89d of the stage 89a.

  As shown in FIG. 8, the entire reference surface 230 has a ring shape. Similarly, three reference surface member engaging portions 231 having a ring shape are fixed to the peripheral surface of the lens barrel 101 by screws 232, 232, and 232 at intervals of 120 ° in the circumferential direction.

  The lens barrel reference surface 234 and the optical axis L ′ are in a vertical relationship almost certainly during the manufacturing process. At the same time, the reference surface 230 is also perpendicular to the optical axis L ′ when it is fixed to the lens barrel 101 with the screw 232. Therefore, the lens barrel reference surface 234 and the reference surface 230 are substantially parallel when assembled.

  Next, the fixing member 120 is attached to the lens barrel 101 while maintaining the positional relationship between the lens barrel 101 and the collimator 89, and further, the reflection mirror 110 is attached to the fixing member 120. At this time, light is emitted from the collimator 89 toward the plane 112 of the reflection mirror 110, and it is confirmed whether the reference plane 230 and the plane 112 are substantially parallel by the reflected light. When the reference surface 230 and the flat surface 112 are not substantially parallel, the screw 172 shown in FIGS. 12 and 13, the adjustment screw 201 shown in FIG. 18 and the position adjustment screw 221 shown in FIGS. And adjust until they are substantially parallel.

  Here, the term “substantially parallel” includes both the case of being completely parallel and the case of being substantially parallel allowing an angle shift of 15 minutes or less, 10 minutes or less, or 5 minutes or less. In addition, the term “substantially vertical” includes both the case of being completely vertical and the case of being substantially vertical allowing an angle shift of 15 minutes or less, 10 minutes or less, or 5 minutes or less.

  As described above, the positional relationship between the constituent members of the optical member 100 according to the second embodiment is adjusted. When this optical member 100 is attached to the main body of an optical device such as a projector for projecting an enlarged display screen of a personal computer, the optical member 100 is attached based on the reference plane 230 of the lens barrel 101, so that the positional relationship of each component of the optical device Is accurate.

(Main effects obtained by the embodiment of the present invention)
The optical members 1 and 100 according to the first and second embodiments of the present invention have reflection mirrors 20 and 110, respectively. The rear surfaces of the curved surfaces 21 and 111 of the reflecting mirrors 20 and 110 have the planes 22 and 112 for adjusting the mutual positional relationship between the lens barrel 10 and the reflecting mirror 20 or between the lens barrel 101 and the reflecting mirror 110, respectively. . Therefore, if a collimator or the like is used, the positional relationship between the reference surface 90 of the fixing member 30, the reference surface 230 of the lens barrel 101, and the reflecting mirrors 20 and 110 can be made substantially parallel. Therefore, the optical members 1, 100 and the reflection mirrors 20, 110 according to the first and second embodiments of the present invention can make the positional relationship between the constituent members accurate.

  The optical members 1 and 100 according to the first and second embodiments of the present invention have reflection mirrors 20 and 110, respectively. The reflecting mirrors 20 and 110 are parabolic surfaces whose curved surfaces 21 and 111 are rotated around a parabola around the axis of symmetry, and the curved surfaces 21 and 111 of the reflecting mirrors 20 and 110 are substantially symmetrical with an axis of symmetry on the back side. Vertical planes 22 and 112. Therefore, if a collimator or the like is used, the positional relationship between the reference surface 90 of the fixing member 30, the reference surface 230 of the lens barrel 101, and the reflecting mirrors 20 and 110 can be made substantially parallel. Therefore, the optical members 1, 100 and the reflection mirrors 20, 110 according to the first and second embodiments of the present invention can make the positional relationship between the constituent members accurate. Furthermore, since this symmetry axis is the optical axis of the reflecting mirrors 20 and 110, it is possible to make the optical axis coincide with or parallel to the optical axes L and L 'of the lens barrels 10 and 101.

  The optical members 1 and 100 according to the first and second embodiments of the present invention have reflection mirrors 20 and 110, respectively. The reflecting mirrors 20 and 110 have flat surfaces 22 and 112 that are substantially perpendicular to the optical axis of the reflecting mirrors 20 and 110, whose curved surfaces 21 and 111 pass through the innermost part of the curved surface. Therefore, if a collimator or the like is used, the positional relationship between the reference surface 90 of the fixing member 30, the reference surface 230 of the lens barrel 101, and the reflecting mirrors 20 and 110 can be made substantially parallel. Therefore, the optical members 1, 100 and the reflection mirrors 20, 110 according to the first and second embodiments of the present invention can make the positional relationship between the constituent members accurate. Furthermore, the optical members 1, 100 and the reflection mirrors 20, 110 can make the optical axes of the reflection mirrors 20, 110 coincide with or parallel to the optical axes L, L ′ of the lens barrels 10, 101.

  As described above, the optical members 1 and 100 and the reflection mirrors 20 and 110 make it possible to make the positional relationship between the constituent members accurate. Therefore, the planes 22 and 112 included in the reflection mirrors 20 and 110 and The optical axes L and L ′ of the lens barrels 10 and 101 can be in a substantially vertical positional relationship.

  The optical member 1 and the reflection mirror 20 further include a fixing member 30 that fixes the lens barrel 10 and the reflection mirror 20, and a plane portion that is in a substantially parallel positional relationship with the plane 22 that the reflection mirror 20 has. The fixing member 30 can have a certain reference surface 90.

  Further, since the planes 22 and 112 of the reflection mirrors 20 and 110 can reflect light, it is not necessary to prepare a member such as the reflection plate 92 shown in FIG.

(Other forms)
The optical members 1, 100 and the reflection mirrors 20, 110 according to the first and second embodiments of the present invention described above are examples of preferred embodiments of the present invention, but are not limited thereto. Various modifications can be made without departing from the scope of the present invention.

  For example, the reflecting mirrors 20 and 110 are paraboloids whose curved surfaces 21 and 111 rotate a parabola around the symmetry axis, and the curved surfaces 21 and 111 of the reflection mirrors 20 and 110 are symmetrical on the back side. And planes 22 and 112 substantially perpendicular to each other. However, the angle between the symmetry axis and the planes 22 and 112 can be changed as appropriate. Even if it changes in that way, the positional relationship between each component can be made accurate by confirming at which angle the light of the collimator irradiated to the planes 22 and 112 is reflected. However, from the viewpoint of facilitating the adjustment of the positional relationship between the constituent members of the optical members 1 and 100, the symmetry axis and the planes 22 and 112 are preferably substantially perpendicular.

  Further, the reflecting mirrors 20 and 110 have flat surfaces 22 and 112 that are substantially perpendicular to the optical axis of the reflecting mirrors 20 and 110 whose curved surfaces 21 and 111 pass through the innermost part of the curved surface. However, the angles of the optical axes of the reflecting mirrors 20 and 110 and the planes 22 and 112 can be changed as appropriate. For example, the optical axes of the reflection mirrors 20 and 110 may not pass through the innermost portions of the curved surfaces 21 and 111. Even if it changes in that way, the positional relationship between each component can be made accurate by confirming at which angle the light of the collimator irradiated to the planes 22 and 112 is reflected. However, from the viewpoint of facilitating adjustment of the positional relationship between the constituent members of the optical members 1 and 100, it is preferable that the optical axes of the reflection mirrors 20 and 110 and the planes 22 and 112 are substantially perpendicular.

  Further, the planes 22 and 112 of the reflection mirrors 20 and 110 can reflect light, but cannot reflect light, and an additional member such as a reflector 92 shown in FIG. 7 may be used. good. However, it is preferable that the planes 22 and 112 are capable of reflecting light from the viewpoint of facilitating the adjustment of the positional relationship between the constituent members of the optical members 1 and 100.

  Adjustment of the positional relationship between the constituent members of the optical members 1 and 100 is performed when the optical members 1 and 100 are assembled alone. You may carry out, attaching a part of member. For example, in the adjustment of the positional relationship between the constituent members of the optical member 100, after the adjustment of the position of the lens barrel 101 and the collimator is completed, the lens barrel 101 is attached to the optical apparatus while maintaining the positional relationship of the lens barrel 101 and the collimator. The positional relationship between the lens barrel 101 and the reflecting mirror 110 may be adjusted in the attached state. At this time, when only the lens barrel 101 is incorporated in the optical device, if the reference surface 230 of the lens barrel 101 is aligned with a member corresponding to the reference surface of the optical device, the assembly of the optical device is facilitated. Become.

  Since the fixing members 30 and 120 are not essential components, they can be omitted. For example, a configuration in which the lens barrels 10 and 101 and the reflecting mirrors 20 and 110 are fixed directly or with a predetermined member interposed therebetween may be adopted.

  The curved surfaces 21 and 111 of the reflecting mirrors 20 and 110 are so-called aspherical surfaces, but may be other curved surfaces such as free-form surfaces.

DESCRIPTION OF SYMBOLS 1,100 Optical member 10,101 Barrel 20,110 Reflection mirror 21,111 Curved surface 22,112 Plane 30,120 Fixed member 90,230 Reference plane (plane part)
L, L 'Optical axis

Claims (7)

In an optical member having a barrel that emits the generated image light and a reflection mirror having a curved surface that reflects the image light,
The lens barrel disposed opposite to the curved surface of the reflection mirror, and a fixing member to which the reflection mirror fixed by the first mirror holding member is fixed ;
The back side of the curved surface of the reflection mirror has a plane that reflects the light emitted from the collimator for adjusting the mutual positional relationship between the lens barrel and the reflection mirror,
The fixing member has a reference surface for adjusting the mutual positional relationship between the lens barrel and the reflecting mirror,
The reference plane is provided on the side not facing the reflection mirror, and is installed and fixed on the collimator stage .
Of the end surfaces surrounding the reflection mirror, the two side end surfaces connecting the upper end surface and the lower end surface have groove-like engaging portions that are cut out so as to open in the direction toward the lens barrel side,
Two protrusions arranged in through-holes that respectively penetrate the pair of opposed surfaces of the first mirror holding member that are opposed to the two side end surfaces respectively enter the groove-shaped engaging portion and enter the groove. Engaged with the engagement part,
Optical members, wherein the rotational operable to Rukoto the reflection mirror as an axis of rotation the axis connecting the two projections. In an optical member that includes a lens barrel that emits the generated image light and a reflection mirror that has a curved surface that reflects the image light, and the lens barrel is disposed to face the curved surface of the reflection mirror.
The back side surface of the curved surface of the reflection mirror fixed by the mirror first holding member has a plane that reflects the light emitted from the collimator for adjusting the mutual positional relationship between the lens barrel and the reflection mirror,
The lens barrel has a reference surface for adjusting the mutual positional relationship between the lens barrel and the reflecting mirror,
The reference surface is provided on the side not facing the reflection mirror, and is installed and fixed on a collimator stage .
Of the end surfaces surrounding the reflection mirror, the two side end surfaces connecting the upper end surface and the lower end surface have groove-like engaging portions that are cut out so as to open in the direction toward the lens barrel side,
The two first engaged members disposed in the engaging hole portions respectively penetrating the pair of opposing surfaces of the first mirror holding member, which are opposed to the two side end surfaces, respectively, are in the groove-like engagement. Enter the part and engage with the groove-shaped engaging part,
Optical members, wherein the rotational operable to Rukoto the reflection mirror as an axis of rotation the axis connecting the two first engaged member. In an optical member that includes a lens barrel that emits the generated image light and a reflection mirror that has a curved surface that reflects the image light, and the lens barrel is disposed to face the curved surface of the reflection mirror.
The back side surface of the curved surface of the reflection mirror fixed by the mirror first holding member has a plane that reflects the light emitted from the collimator for adjusting the mutual positional relationship between the lens barrel and the reflection mirror,
The lens barrel has a lens barrel reference surface for adjusting the mutual positional relationship between the lens barrel and the reflecting mirror,
The lens barrel reference surface is provided on the side opposed to the reflection mirror, further,
Of the end surfaces surrounding the reflection mirror, the two side end surfaces connecting the upper end surface and the lower end surface have groove-like engaging portions that are cut out so as to open in the direction toward the lens barrel side,
The two first engaged members disposed in the engaging hole portions respectively penetrating the pair of opposing surfaces of the first mirror holding member, which are opposed to the two side end surfaces, respectively, are in the groove-like engagement. Enter the part and engage with the groove-shaped engaging part,
Optical members, wherein the rotational operable to Rukoto the reflection mirror as an axis of rotation the axis connecting the two first engaged member. In the optical member according to any one of claims 1 to 3,
An optical member, wherein the plane and the optical axis of the barrel are substantially perpendicular to each other. In the optical member according to any one of claims 1 to 4,
The optical member, wherein the plane is capable of reflecting light. The optical member according to any one of claims 1 to 5,
The optical member, wherein the flat surface has a substantially parallel relationship with the reference surface or the lens barrel reference surface. The optical member according to any one of claims 1 to 6,
The optical member, wherein the flat surface and the reference surface or the lens barrel reference surface are on the same optical axis.

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