JP6425886B2 - Projection optical system mounting structure - Google Patents

Projection optical system mounting structure Download PDF

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JP6425886B2
JP6425886B2 JP2013265000A JP2013265000A JP6425886B2 JP 6425886 B2 JP6425886 B2 JP 6425886B2 JP 2013265000 A JP2013265000 A JP 2013265000A JP 2013265000 A JP2013265000 A JP 2013265000A JP 6425886 B2 JP6425886 B2 JP 6425886B2
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engagement surface
optical system
projection
lens barrel
projection optical
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貴 山口
貴 山口
恭彦 松尾
恭彦 松尾
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本発明は、曲面ミラーを保持するミラー保持部材とレンズ鏡筒とを固定部材で連結する投射光学系の取付構造に関する。   The present invention relates to a mounting structure of a projection optical system in which a mirror holding member holding a curved mirror and a lens barrel are connected by a fixing member.

レンズ素子により構成される屈折光学系と、屈折光学系よりも投射側に曲面ミラーを配置する構成の投射光学系と、その構成を利用した投射距離の短いプロジェクターが公知である（例えば特許文献１参照）。   There is known a dioptric optical system constituted by a lens element, a projection optical system having a curved mirror disposed on the projection side of the dioptric optical system, and a projector having a short projection distance using the construction (for example, Patent Document 1) reference).

そして、屈折光学系の光軸に対して曲面ミラーが傾いた際の調整法としては様々な提案がなされている（例えば特許文献２参照）。   Various proposals have been made as an adjustment method when the curved mirror is inclined with respect to the optical axis of the refractive optical system (see, for example, Patent Document 2).

また、レンズ鏡筒と曲面ミラーとを連結する固定部材を介在させることで、屈折光学系と曲面ミラーとの位置合わせが行われている（例えば特許文献３参照）。   Further, by interposing a fixing member that connects the lens barrel and the curved mirror, alignment between the dioptric system and the curved mirror is performed (see, for example, Patent Document 3).

特開２００４‐２５８６２０号公報JP 2004-258620 A 特開２０１１‐０５９４５９号公報JP, 2011-05459, A 特開２０１０‐１０７７７８号公報Unexamined-Japanese-Patent No. 2010-107778

しかし、特許文献１のような構成の場合、曲面ミラーの角度及び位置の変化に対する光学的性能の変化が大きく、屈折光学系の光軸と曲面ミラー光軸との調整の精度が求められる。   However, in the case of the configuration as described in Patent Document 1, the change in optical performance with respect to the change in angle and position of the curved mirror is large, and the accuracy of adjustment between the optical axis of the dioptric system and the curved mirror optical axis is required.

また、屈折光学系の光軸に対して曲面ミラーの光軸が直交方向へずれるシフトズレに対する対策案はほとんど見られない。
なお、シフトズレの原因は各部品の精度にもよるが、問題となりやすいのはレンズ鏡筒と曲面ミラーとの光軸上の位置を固定する際の組み立て時の誤差である。 In addition, there is almost no proposal for a measure against the shift of the optical axis of the curved mirror in the direction orthogonal to the optical axis of the refractive optical system.
Although the cause of the shift depends on the accuracy of each part, it is the assembling error at the time of fixing the position on the optical axis of the lens barrel and the curved mirror, which tends to be a problem.

そして、特許文献３のように、レンズ鏡筒と曲面ミラーとを連結する固定部材を介在させることで、屈折光学系と曲面ミラーとの位置合わせを行う場合、レンズ鏡筒と固定部材との結合位置が曲面ミラーから離れ過ぎている。このため、固定部材自体の反りや結合部分で組み立て時に発生した少量の傾きでも、結合部分から曲面ミラーまでの距離が大きくなるほど曲面ミラー自体の屈折光学系の光軸に対するシフトズレが大きくなってしまう。   Then, as in Patent Document 3, when positioning of the dioptric system and the curved mirror is performed by interposing a fixing member that connects the lens barrel and the curved mirror, coupling of the lens barrel and the fixing member is performed. The position is too far from the curved mirror. For this reason, even if the fixed member itself warps or a small amount of inclination generated at the time of assembly at the joint portion, the shift deviation of the curved mirror itself with respect to the optical axis of the refractive optical system becomes larger as the distance from the joint portion to the curved mirror increases.

本発明の課題は、曲面ミラー保持部材とレンズ鏡筒とを固定部材で連結する投射光学系において、固定部材自体の製造誤差や組立誤差による曲面ミラーの位置ズレを抑制することを可能となるようにすることである。   An object of the present invention is to provide a projection optical system in which a curved mirror holding member and a lens barrel are connected by a fixing member, so that positional deviation of the curved mirror due to manufacturing errors and assembly errors of the fixing member itself can be suppressed. It is to

以上の課題を解決するため、請求項１に記載の発明は、
曲面ミラーを保持するミラー保持部材とレンズ鏡筒とを固定部材で連結する投射光学系の取付構造であって、
前記レンズ鏡筒に第一係合面を設けて、
前記固定部材に第二係合面を設け、
前記第一係合面及び第二係合面を合わせて固定した状態で、前記第一係合面が光軸方向において前記投射光学系の全長の半分よりも投射側に位置していることを特徴とする。 In order to solve the above problems, the invention according to claim 1 is:
A mounting structure of a projection optical system in which a mirror holding member for holding a curved mirror and a lens barrel are connected by a fixing member,
Providing a first engagement surface on the lens barrel;
Providing a second engagement surface on the fixing member;
In a state in which the first engagement surface and the second engagement surface are fixed together, the first engagement surface is positioned on the projection side in the optical axis direction rather than half of the total length of the projection optical system. It features.

請求項２に記載の発明は、
請求項１に記載の投射光学系の取付構造であって、
前記第二係合面に開口部を設け、
前記開口部に前記レンズ鏡筒の投射側を挿入するように前記固定部材を前記レンズ鏡筒と光軸上の位置を重複させながら前記第一係合面と第二係合面とを接触させることを特徴とする。 The invention according to claim 2 is
It is the attachment structure of the projection optical system according to claim 1,
Providing an opening in the second engagement surface;
The fixing member is brought into contact with the first engagement surface and the second engagement surface while overlapping the position on the optical axis with the lens barrel such that the projection side of the lens barrel is inserted into the opening. It is characterized by

請求項３に記載の発明は、
請求項１または２に記載の投射光学系の取付構造であって、
前記第一係合面と第二係合面は互いに光軸と直交する面であることを特徴とする。 The invention according to claim 3 is
The mounting structure of the projection optical system according to claim 1 or 2,
The first engagement surface and the second engagement surface are surfaces orthogonal to the optical axis.

請求項４に記載の発明は、
請求項１から３のいずれか一項に記載の投射光学系の取付構造であって、
前記第一係合面と第二係合面の間には、各々の係合面の光軸方向の距離を調整する調整機構が備えられていることを特徴とする。 The invention according to claim 4 is
It is an attachment structure of the projection optical system according to any one of claims 1 to 3,
An adjustment mechanism is provided between the first engagement surface and the second engagement surface to adjust the distance in the optical axis direction of each engagement surface.

請求項５に記載の発明は、
請求項１から４のいずれか一項に記載の投射光学系の取付構造であって、
前記第二係合面よりも本体側には、前記固定部材が形成されないことを特徴とする。 The invention according to claim 5 is
It is an attachment structure of the projection optical system according to any one of claims 1 to 4,
The fixing member is not formed on the main body side of the second engagement surface.

請求項６に記載の発明は、
請求項１から５のいずれか一項に記載の投射光学系の取付構造であって、
前記第一係合面が、光軸方向における前記レンズ鏡筒内部の屈折光学系の内部で形成される中間像の光軸上の位置よりも投射側に位置していることを特徴とする。 The invention according to claim 6 is
It is an attachment structure of the projection optical system according to any one of claims 1 to 5,
The first engagement surface is located on the projection side of a position on an optical axis of an intermediate image formed inside the dioptric system inside the lens barrel in the optical axis direction.

請求項７に記載の発明は、
請求項１から６のいずれか一項に記載の投射光学系の取付構造であって、
前記第一係合面と第二係合面の外形が、前記レンズ鏡筒の最大外径よりも小さいことを特徴とする。 The invention according to claim 7 is
The mounting structure of the projection optical system according to any one of claims 1 to 6,
The outer shapes of the first engagement surface and the second engagement surface are smaller than the maximum outer diameter of the lens barrel.

請求項８に記載の発明は、
曲面ミラーを保持するミラー保持部材とレンズ鏡筒とを固定部材で連結する投射光学系の取付構造であって、
前記レンズ鏡筒は、本体側の本体側レンズ鏡筒と投射側の投射側レンズ鏡筒とに分離可能であり、
前記投射側レンズ鏡筒の投射側に前記固定部材を一体的に設け、
前記本体側レンズ鏡筒に第三係合面を設けて、
前記投射側レンズ鏡筒に第四係合面を設け、
前記第三係合面及び第四係合面は合わせて固定した状態で、前記第三係合面が光軸方向において前記投射光学系の全長の半分よりも投射側に位置していることを特徴とする。 The invention according to claim 8 is
A mounting structure of a projection optical system in which a mirror holding member for holding a curved mirror and a lens barrel are connected by a fixing member,
The lens barrel can be separated into a main body side lens barrel on the main body side and a projection side lens barrel on the projection side,
The fixing member is integrally provided on the projection side of the projection side lens barrel;
Providing a third engagement surface on the body side lens barrel,
Providing a fourth engagement surface on the projection side lens barrel;
In a state where the third engagement surface and the fourth engagement surface are fixed together, the third engagement surface is positioned on the projection side in the optical axis direction rather than half of the total length of the projection optical system. It features.

請求項９に記載の発明は、
請求項８に記載の投射光学系の取付構造であって、
前記第三係合面と第四係合面は互いに光軸と直交する面であることを特徴とする。 The invention according to claim 9 is
A mounting structure of a projection optical system according to claim 8,
The third engagement surface and the fourth engagement surface may be surfaces orthogonal to the optical axis.

請求項１０に記載の発明は、
請求項８または９に記載の投射光学系の取付構造であって、
前記第三係合面と第四係合面の間には、各々の係合面の光軸方向の距離を調整する調整機構が備えられていることを特徴とする。 The invention according to claim 10 is
The mounting structure of a projection optical system according to claim 8 or 9,
An adjusting mechanism is provided between the third engaging surface and the fourth engaging surface to adjust the distance of each engaging surface in the optical axis direction.

請求項１１に記載の発明は、
請求項４または１０に記載の投射光学系の取付構造であって、
前記調整機構はワッシャであることを特徴とする。 The invention according to claim 11 is
A mounting structure of a projection optical system according to claim 4 or 10, wherein
The adjustment mechanism is a washer.

請求項１２に記載の発明は、
請求項８から１０のいずれか一項に記載の投射光学系の取付構造であって、
前記第四係合面よりも本体側には、前記固定部材が形成されないことを特徴とする。 The invention according to claim 12 is
The mounting structure of a projection optical system according to any one of claims 8 to 10 , wherein
The fixing member is not formed on the main body side with respect to the fourth engagement surface.

請求項１３に記載の発明は、
請求項８から１０のいずれか一項に記載の投射光学系の取付構造であって、
前記第三係合面が、光軸方向における前記レンズ鏡筒内部の屈折光学系の内部で形成される中間像の光軸上の位置よりも投射側に位置していることを特徴とする。 The invention according to claim 13 is
The mounting structure of a projection optical system according to any one of claims 8 to 10 , wherein
The third engagement surface is located on the projection side of a position on the optical axis of an intermediate image formed inside the dioptric system inside the lens barrel in the optical axis direction.

請求項１４に記載の発明は、
請求項８から１０のいずれか一項に記載の投射光学系の取付構造であって、
前記第三係合面と第四係合面の外形が、前記レンズ鏡筒の最大外径よりも小さいことを特徴とする。 The invention according to claim 14 is
The mounting structure of a projection optical system according to any one of claims 8 to 10 , wherein
The third engaging surface and the fourth engaging surface may be smaller in outer diameter than the maximum outer diameter of the lens barrel.

請求項１５に記載の発明は、
請求項１から１４のいずれか一項に記載の投射光学系の取付構造であって、
前記ミラー保持部材は、前記曲面ミラーを、前記レンズ鏡筒内部の屈折光学系の光軸に対して角度及び位置を調整可能に支持していることを特徴とする。 The invention according to claim 15 is
A mounting structure of a projection optical system according to any one of claims 1 to 14,
The mirror holding member supports the curved mirror so as to adjust its angle and position with respect to the optical axis of the refractive optical system inside the lens barrel.

請求項１６に記載の発明は、
請求項１１に記載の投射光学系の取付構造であって、
請求項４に記載の前記調整機構を構成するワッシャと第一係合面及び第二係合面が略同一形状、または請求項１０に記載の前記調整機構を構成するワッシャと第三係合面及び第四係合面が略同一形状であることを特徴とする。 The invention according to claim 16 is
It is a mounting structure of the projection optical system according to claim 11,
A washer constituting the adjusting mechanism according to claim 4 and a first engaging surface and a second engaging surface have substantially the same shape, or a washer constituting the adjusting mechanism according to claim 10 and a third engaging surface And the fourth engagement surface have substantially the same shape.

本発明によれば、固定部材とレンズ鏡筒との結合位置をより曲面ミラー側へ近づけることにより、固定部材自体の製造誤差や組立誤差による曲面ミラーの位置ズレを抑制することが可能となる。   According to the present invention, by bringing the coupling position of the fixing member and the lens barrel closer to the curved mirror side, it is possible to suppress positional deviation of the curved mirror due to manufacturing errors and assembly errors of the fixing member itself.

本発明を適用する投射光学系に備える曲面ミラーの調整装置の構成を示すもので、曲面ミラーと第１保持部材（ミラー保持部材）の関係を曲面ミラー側から見た分解斜視図である。The structure of the adjustment apparatus of the curved surface mirror with which the projection optical system to which this invention is applied is shown is shown, and it is the disassembled perspective view which looked at the relationship between the curved surface mirror and the 1st holding member (mirror holding member) from the curved surface mirror side. 図１と逆に第１保持部材側から見た図である。It is the figure seen from the 1st holding member side contrary to FIG. 図１及び図２の曲面ミラーと第１保持部材を結合して第２保持部材（ミラー保持部材）との関係を示すもので、第１保持部材側から見た斜視図（ａ）と、その反対側から見た図（ｂ）である。FIG. 3 shows the relationship between the second holding member (mirror holding member) by combining the curved mirror of FIG. 1 and FIG. 2 with the first holding member, and a perspective view (a) seen from the first holding member side and It is the figure (b) seen from the other side. 図３の曲面ミラーと第１保持部材及び第２保持部材を結合した状態を示すもので、調整用ネジ側から見た斜視図（ａ）と、その反対側から見た図（ｂ）である。FIG. 4 shows the curved mirror of FIG. 3 coupled to the first holding member and the second holding member, and is a perspective view (a) seen from the adjustment screw side and a view (b) seen from the opposite side . 図４の曲面ミラーと第１保持部材及び第２保持部材と固定部材の関係を示すもので、固定部材側から見た斜視図（ａ）と、その反対側から見た図（ｂ）である。FIG. 5 shows the relationship between the curved mirror of FIG. 4 and the first holding member, the second holding member, and the fixing member, and is a perspective view (a) seen from the fixing member side and a view (b) seen from the opposite side . 図５の曲面ミラーと第１保持部材及び第２保持部材と固定部材と冶具部材の関係を示すもので、冶具部材側から見た斜視図（ａ）と、その反対側から見た図（ｂ）である。FIG. 6 shows the relationship between the curved mirror of FIG. 5, the first holding member, the second holding member, the fixing member, and the jig member, and FIG. 5B is a perspective view as seen from the jig member side and FIG. ). 図６の曲面ミラーと第１保持部材及び第２保持部材と固定部材と冶具部材の結合状態を示すもので、冶具部材側から見た斜視図（ａ）と、その反対側から見た図（ｂ）である。6 is a perspective view of the curved mirror and the first holding member, the second holding member, the fixing member, and the jig member shown in FIG. 6 as viewed from the jig member side, and a view from the opposite side ((a) b). 曲面ミラーと第１保持部材の関係を示すもので、背面側から見た模式図（ａ）と、その中央縦断面図（ｂ）である。The relationship between a curved surface mirror and a 1st holding member is shown, and it is the schematic diagram (a) seen from the back side, and its center longitudinal cross-sectional view (b). 曲面ミラーと第１保持部材の関係を示すもので、前面側から見た模式図（ａ）と、その中央縦断面図（ｂ）である。The relationship between a curved surface mirror and a 1st holding member is shown, and it is the schematic diagram (a) seen from the front side, and its center longitudinal cross-sectional view (b). 第２保持部材に対する第１保持部材の関係を示す要部縦断側面図である。It is a principal part longitudinal side view which shows the relationship of the 1st holding member with respect to a 2nd holding member. 固定部材に対する第２保持部材の関係を示す要部縦断側面図である。It is a principal part longitudinal side view which shows the relationship of the 2nd holding member with respect to a fixing member. 本発明を適用した投射光学系の取付構造の一実施形態の構成を示すもので、鏡筒と固定部材が別体型の場合の組立状態を示した縦断側面図である。The structure of one Embodiment of the attachment structure of the projection optical system which applied this invention is shown, and it is the longitudinal cross-sectional view which showed the assembly state in the case of a lens-barrel and a fixing member being another body type. 図１２の鏡筒及び固定部材の分解図である。FIG. 13 is an exploded view of a lens barrel and a fixing member of FIG. 12; 図１２の組立状態の斜視図で、投射側から見た図（ａ）と、本体側から見た図（ｂ）である。It is the perspective view of the assembly state of FIG. 12, and is the figure (a) seen from the projection side, and the figure (b) seen from the main body side. 図１３の分解状態の斜視図で、投射側から見た図（ａ）と、本体側から見た図（ｂ）である。It is the perspective view of the decomposition | disassembly state of FIG. 13, the figure (a) seen from the projection side, and the figure (b) seen from the main body side. 実施形態２を示すもので、鏡筒と固定部材が一体型の場合の組立状態を示した縦断側面図である。It is a longitudinal side view which shows Embodiment 2 and shows the assembly state in case a lens-barrel and a fixing member are integral type. 図１６の鏡筒及び固定部材の分解図である。FIG. 17 is an exploded view of the lens barrel and the fixing member of FIG. 16; 図１６の組立状態の斜視図で、投射側から見た図（ａ）と、本体側から見た図（ｂ）である。FIG. 17 is a perspective view of the assembled state of FIG. 16, which is a view (a) seen from the projection side and a view (b) seen from the main body side. 図１７の分解状態の斜視図で、投射側から見た図（ａ）と、本体側から見た図（ｂ）である。It is the perspective view of the decomposition | disassembly state of FIG. 17, and is the figure (a) seen from the projection side, and the figure (b) seen from the main body side.

以下、図を参照して本発明を実施するための形態を詳細に説明する。
始めに、本発明を適用する投射光学系に備える曲面ミラーの調整装置について説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, an adjustment apparatus for a curved mirror provided in a projection optical system to which the present invention is applied will be described.

（曲面ミラーの調整装置）
図１及び図２は本発明を適用する投射光学系に備える曲面ミラーの調整装置の構成として曲面ミラー１とミラー保持部材の第１保持部材１１の関係を示すもので、図３及び図４はさらにミラー保持部材の第２保持部材１２との関係を示し、図５はさらに固定部材２１との関係を示し、図６及び図７はさらに冶具部材３１との関係を示している。 (Adjustment device of curved mirror)
1 and 2 show the relationship between the curved mirror 1 and the first holding member 11 of the mirror holding member as a configuration of the curved mirror adjustment device provided in the projection optical system to which the present invention is applied, and FIGS. Further, the relationship between the mirror holding member and the second holding member 12 is shown, FIG. 5 further shows the relationship with the fixing member 21, and FIGS. 6 and 7 further show the relationship with the jig member 31.

そして、図８及び図９は曲面ミラー１と第１保持部材１１の関係を模式的に示すもので、図１０は第２保持部材１２に対する第１保持部材１１の関係を示し、図１１は固定部材２１に対する第２保持部材１２の関係を示している。   8 and 9 schematically show the relationship between the curved mirror 1 and the first holding member 11. FIG. 10 shows the relationship between the first holding member 11 and the second holding member 12. FIG. The relationship between the second holding member 12 and the member 21 is shown.

「前提」
始めに、画像調整素子からの画像光を屈折光学素子から構成される結像光学系へ入射し、結像光学系から出射した光線を曲面ミラー１の反射面で反射することにより被投射面へ画像光を拡大投射する投射光学系において、図１に示すように、結像光学系の光線をＺ軸、画像調整素子の画像中心から出射した光線の軌跡の存在する平面内におけるＺ軸と直交する軸をＹ軸、Ｚ軸及びＹ軸とそれぞれ直交する軸をＸ軸と規定し、各軸と平行な方向をそれぞれＺ軸方向、Ｙ軸方向、Ｘ軸方向と規定する。 "Assumption"
First, the image light from the image adjustment element is made incident on the imaging optical system composed of the dioptric optical element, and the light beam emitted from the imaging optical system is reflected by the reflection surface of the curved mirror 1 to the projection surface In a projection optical system that magnifies and projects image light, as shown in FIG. 1, the light beam of the imaging optical system is orthogonal to the Z axis within the plane where the Z axis represents the light beam emitted from the image center of the image adjustment element. An axis perpendicular to the Y axis and the Z axis and the Y axis is defined as an X axis, and a direction parallel to each axis is defined as a Z axis direction, a Y axis direction, and an X axis direction.

また、投射光学系を光軸が地面と平行となるように地面に設置した場合において、Ｚ軸方向において、画像調整素子側を前側、被投射面側を後側と規定し、Ｘ軸方向において、前側から後側を見た場合の左右をそれぞれ左側、右側と規定して、Ｙ軸方向において、前側から後側を見た場合の上下をそれぞれ上側、下側と規定し、左右方向はＸ軸方向、上下方向はＹ軸方向、前後方向はＺ軸方向とそれぞれ対応する。   When the projection optical system is installed on the ground so that the optical axis is parallel to the ground, the image adjustment element side is defined as the front side and the projection surface side is defined as the rear side in the Z axis direction. The left and right sides as viewed from the front side are respectively defined as the left side and the right side, and the upper and lower sides as viewed from the front side are respectively defined as the upper side and the lower side in the Y axis direction. The axial direction, the vertical direction correspond to the Y-axis direction, and the front-rear direction corresponds to the Z-axis direction.

曲面ミラー１は、非円形の曲線を回転軸にＺ軸を用いて回転させた際に形成される非球面のうち、鏡軸であるＺ軸上の面を含まない一部の面を用いた形状を有しており、結像光学系の光軸及び曲面ミラー１の鏡軸は共軸である。   The curved mirror 1 uses a part of the aspheric surface formed when the non-circular curve is rotated about the rotation axis using the Z axis, but does not include the surface on the Z axis that is the mirror axis. The optical axis of the imaging optical system and the mirror axis of the curved mirror 1 are coaxial.

「曲面ミラー」
図１及び図２に示すように、曲面ミラー１の反射面外の外周面のＸ軸と平行な第１軸線上に、左右一箇所ずつ溝状係合部１ａが形成されている。この溝状係合部１ａは、曲面ミラー１の前側から後側へ向かって溝が形成され、反射面側は開放されている。 "Curved mirror"
As shown in FIGS. 1 and 2, on the first axis parallel to the X-axis parallel to the X-axis of the outer peripheral surface outside the reflection surface of the curved mirror 1, groove-shaped engaging portions 1a are formed one by one at the left and right. The groove-shaped engaging portion 1a is formed with a groove from the front side to the rear side of the curved mirror 1, and the reflecting surface side is open.

曲面ミラー１の下端部側には、軸心がＹ軸方向に向き、かつＺ軸と直交する突起部１ｂが形成されている。この突起部１ｂは、前後方向に貫通した穴部１ｃを有している。
また、曲面ミラー１の上端部側には、軸心がＹ軸方向に向い、かつＺ軸と直交する突起部１ｄが形成されている。 On the lower end portion side of the curved mirror 1, a protrusion 1 b whose axis is oriented in the Y-axis direction and orthogonal to the Z-axis is formed. The protrusion 1 b has a hole 1 c penetrating in the front-rear direction.
Further, on the upper end portion side of the curved mirror 1, a protrusion 1 d whose axis is directed in the Y-axis direction and which is orthogonal to the Z-axis is formed.

「第１保持部材」
曲面ミラー１の外周側には、図１及び図２に示すように、第１保持部材１１が配置されている。この第１保持部材１１は、内周側に曲面ミラー１を保持可能に形成されている。
第１保持部材１１には、曲面ミラー１の溝状係合部１ａに対応する位置に、左右方向に貫通した貫通孔１１ａが形成されている。この左右の貫通孔１１ａには、軸心が各々Ｘ軸と平行な第１軸線上にある軸状部材の第１被係合部材２がそれぞれ嵌め込まれている。溝状係合部１ａは第１被係合部材２と係合することにより、第１保持部材１１に第１軸線を回動軸として回動可能に保持されている。 "First holding member"
As shown in FIGS. 1 and 2, the first holding member 11 is disposed on the outer peripheral side of the curved mirror 1. The first holding member 11 is formed on the inner peripheral side so as to be able to hold the curved mirror 1.
In the first holding member 11, a through hole 11 a that is penetrated in the left-right direction is formed at a position corresponding to the groove-like engaging portion 1 a of the curved mirror 1. In the left and right through holes 11a, first engaged members 2 of shaft-shaped members whose axis centers are respectively on the first axis parallel to the X-axis are fitted. The groove-shaped engaging portion 1 a is rotatably held by the first holding member 11 with the first axis as a rotation axis by engaging with the first engaged member 2.

また、一方の第１被係合部材２と第１保持部材１１との間にはスプリングワッシャ３が挿入されている。このスプリングワッシャ３により曲面ミラー１は一方の第１被係合部材２と共に第１保持部材１１の他方に押し付けられている。
第１保持部材１１には、曲面ミラー１の突起部１ｂに対応する位置に突起部１１ｂが形成されている。この突起部１１ｂには、前後方向に貫通しかつ前側の開口が狭くネジ穴状である座ぐり形状の穴部１１ｃが形成されている。そして、曲面ミラー１の穴部１ｃと第１保持部材１１の穴部１１ｃには、後側から調整用ネジ４が挿入されて、穴部１１ｃのネジ穴部と螺合している。また、穴部１１ｃの内部には、圧縮バネ５が後側から挿入されている。 Further, a spring washer 3 is inserted between one of the first engaged members 2 and the first holding member 11. The curved mirror 1 is pressed against the other of the first holding member 11 together with the one first engaged member 2 by the spring washer 3.
The first holding member 11 is formed with a protrusion 11 b at a position corresponding to the protrusion 1 b of the curved mirror 1. The protrusion 11b is formed with a counterbore-shaped hole 11c which penetrates in the front-rear direction and whose front opening is narrow and which has a screw hole shape. The adjustment screw 4 is inserted from the rear side into the hole portion 1c of the curved mirror 1 and the hole portion 11c of the first holding member 11, and is screwed with the screw hole portion of the hole portion 11c. In addition, a compression spring 5 is inserted from the rear side into the inside of the hole 11c.

そして、第１保持部材１１には、曲面ミラー１の突起部１ｄに対応する位置に、位置調整用溝部１１ｄが形成されている。この位置調整用溝部１１ｄは、左右方向の溝幅が突起部１ｄの直径よりも大きく、前後方向の溝の深さが突起部１ｄの直径とほぼ等しくなっている。そして、第１保持部材１１の後側から突起部１ｄを位置調整用溝部１１ｄへ挿入した後、位置調整用溝部１１ｄの後側からビス６で固定される板バネ７により、突起部１ｄを位置調整用溝部１１ｄの底部である前側の壁面へ押し付けている。   In the first holding member 11, a position adjustment groove 11 d is formed at a position corresponding to the protrusion 1 d of the curved mirror 1. The groove width in the left-right direction of the position adjusting groove 11d is larger than the diameter of the protrusion 1d, and the depth of the groove in the front-rear direction is substantially equal to the diameter of the protrusion 1d. Then, after inserting the projection 1d into the position adjustment groove 11d from the rear side of the first holding member 11, the projection 1d is positioned by the plate spring 7 fixed by the screw 6 from the rear side of the position adjustment groove 11d. It is pressed against the front wall surface which is the bottom of the adjustment groove 11d.

第１保持部材１１の上端部には、左右方向に離間した位置に二つの板バネ８の一端がビス９でそれぞれ固定されている。この板バネ８の他端は、第１保持部材１１の前側端部から前側へ突き出しており、第１保持部材１１内部の曲面ミラー１の外周部の上端部を付勢している。   One ends of two plate springs 8 are fixed to the upper end portion of the first holding member 11 at positions separated in the left-right direction by screws 9 respectively. The other end of the plate spring 8 protrudes forward from the front end of the first holding member 11 and biases the upper end of the outer peripheral portion of the curved mirror 1 inside the first holding member 11.

よって、図８及び図９に示すように、曲面ミラー１を第１保持部材１１に対して第１被係合部材２を介して保持した状態で調整ネジ４を調整することにより、曲面ミラー１を第１保持部材１１に対して第１軸線（Ｘ）を回転軸として回動可能とした第１角度調整機構Ａ１を構成している。この第１角度調整機構Ａ１により、曲面ミラー１の反射面の角度調整及び固定が可能となっている。   Therefore, as shown in FIGS. 8 and 9, the curved mirror 1 is adjusted by adjusting the adjusting screw 4 in a state in which the curved mirror 1 is held with respect to the first holding member 11 via the first engaged member 2. The first angle adjustment mechanism A1 is configured to be rotatable with respect to the first holding member 11 with the first axis (X) as a rotation axis. The angle adjustment and fixing of the reflection surface of the curved mirror 1 are possible by the first angle adjustment mechanism A1.

また、スプリングワッシャ３によりＸ軸方向のガタツキを抑制し、板バネ７により曲面ミラー１の第１被係合部材２からの脱落及びＺ軸方向のガタツキを抑制し、板バネ８によりＹ軸方向のガタツキを抑制した第１姿勢保持機構Ｂ１を構成している。   Further, rattling in the X-axis direction is suppressed by the spring washer 3, and detachment of the curved mirror 1 from the first engaged member 2 and rattling in the Z-axis direction are suppressed by the plate spring 7. The first posture holding mechanism B1 is configured to suppress the rattling.

さらに、第１保持部材１１の左右方向の外周側の両側面には、延設部１１ｅが一つずつ形成されている。この延設部１１ｅには、上下方向に貫通し、左右方向に比べて前後方向に口径が大きくなった長穴状の穴部１１ｆが形成されている。
そして、２つの延設部１１ｅの後端部には、下方向に延設された延設部１１ｇがそれぞれ一つずつ形成されている。この延設部１１ｇには、Ｚ軸方向に貫通した穴部１１ｈが形成されている。 Furthermore, one extending portion 11 e is formed on each of both side surfaces on the outer peripheral side in the left-right direction of the first holding member 11. The elongated portion 11 e is formed with an elongated hole portion 11 f penetrating in the vertical direction and having a larger diameter in the front-rear direction than in the horizontal direction.
Then, at the rear end of the two extending portions 11e, one extending portion 11g extending downward is formed. The extended portion 11g is formed with a hole 11h penetrating in the Z-axis direction.

また、第１保持部材１１の上端部には、調整用穴部１１ｉが形成されている。この調整用穴部１１ｉの中心軸は、Ｚ軸と直交するＹ軸方向にあり、中心軸とＺ軸の交点は曲面ミラー１の前側の表面付近で結ばれている。   Further, at the upper end portion of the first holding member 11, an adjustment hole 11i is formed. The central axis of the adjustment hole 11 i is in the Y-axis direction orthogonal to the Z-axis, and the intersection point of the central axis and the Z-axis is connected near the front surface of the curved mirror 1.

「第２保持部材」
第１保持部材１１の背面側には、図３に示すように、第２保持部材１２が配置されている。この第２保持部材１２は、内周側に曲面ミラー１を保持した第１保持部材１１を保持可能に形成されている。
第２保持部材１２には、第１保持部材１１の穴部１１ｆに対応する位置に、左右一つずつの固定用ネジ穴部１２ｆが形成されている。この固定用ネジ穴部１２ｆは、第２保持部材１２の端部上に突出した突出部１２ｅのＹ軸方向に向いた軸心に形成されている。
固定用ネジ１３を穴部１１ｆに挿入して固定用ネジ穴部１２ｆに螺合することにより、第２保持部材１２に対して第１保持部材１１の移動を制限している。 "Second holding member"
As shown in FIG. 3, the second holding member 12 is disposed on the back side of the first holding member 11. The second holding member 12 is formed so as to be able to hold the first holding member 11 holding the curved mirror 1 on the inner peripheral side.
The second holding member 12 is formed with left and right fixing screw holes 12 f at positions corresponding to the holes 11 f of the first holding member 11. The fixing screw hole portion 12 f is formed at an axial center of the protruding portion 12 e protruding on the end portion of the second holding member 12 in the Y-axis direction.
The movement of the first holding member 11 with respect to the second holding member 12 is restricted by inserting the fixing screw 13 into the hole 11 f and screwing it into the fixing screw hole 12 f.

なお、固定用ネジ１３で結合する際には、スプリングワッシャ１４と平ワッシャ１５を先に固定用ネジ１３に嵌め込み、第１保持部材１１と第２保持部材１２の間に平ワッシャ１６を挟んでから、固定用ネジ１３を固定用ネジ穴１２ｆに螺合する。   When connecting with the fixing screw 13, the spring washer 14 and the flat washer 15 are first inserted into the fixing screw 13, and the flat washer 16 is held between the first holding member 11 and the second holding member 12. Then, the fixing screw 13 is screwed into the fixing screw hole 12f.

そして、第２保持部材１２には、第１保持部材１１の穴部１１ｈに対応する位置に、左右一つずつの穴部１２ｈが形成されている。この穴部１２ｈは、後側の開口の口径は広くなっているが、前側の開口の口径は小さくなり、ネジ穴状である座ぐり形状になっている。また、穴部１２ｈには、図１０に示すように、後側から圧縮バネ１８が挿入されている。   Then, in the second holding member 12, right and left holes 12 h are formed at positions corresponding to the holes 11 h of the first holding member 11. Although the bore of the rear opening is wide, the bore of the front opening is small, and the hole 12 h has a counterbore shape which is a screw hole. Further, as shown in FIG. 10, a compression spring 18 is inserted into the hole 12h from the rear side.

図４に示すように、後側から調整用ネジ１７を穴部１１ｈ及び圧縮バネ１８、穴部１２ｈに挿入し、穴部１２ｈのネジ穴部に調整用ネジ１７を螺合する。   As shown in FIG. 4, the adjustment screw 17 is inserted into the hole 11h, the compression spring 18, and the hole 12h from the rear side, and the adjustment screw 17 is screwed into the screw hole of the hole 12h.

また、第２保持部材１２の後端部には、穴部１２ｈと左右方向では同軸上に存在し、穴部１２ｈよりも曲面ミラー１の光軸に近づいた位置に、二つの調整用治具固定部１２ｊが形成されている。   Further, at the rear end of the second holding member 12, the two adjustment jigs are present coaxially with the hole 12h in the left-right direction and closer to the optical axis of the curved mirror 1 than the hole 12h. The fixing portion 12j is formed.

よって、図６及び図７に示すように、調整用治具固定部１２ｊに背面から治具部材３１を一対の冶具固定用ネジ３２により固定し、治具部材３１に形成された突起部３１ｉを第１保持部材１１に形成された調整用穴部１１ｉに係合することにより、第１保持部材１１は調整用穴部１１ｉのＹ軸と平行な中心軸を回動軸として回動可能でかつ平行移動が規制される。   Therefore, as shown in FIGS. 6 and 7, the jig member 31 is fixed to the adjustment jig fixing portion 12j from the rear surface by the pair of jig fixing screws 32, and the projection 31i formed on the jig member 31 is By engaging with the adjustment hole 11i formed in the first holding member 11, the first holding member 11 can rotate around a central axis parallel to the Y axis of the adjustment hole 11i as a rotation axis, and Parallel movement is regulated.

このため、図１０に示すように、調整用ネジ１７により第１保持部材１１を第２保持部材１２に対して第２軸線（Ｙ）を回転中心とした角度調整を行う第２角度調整機構Ａ２を構成している。   Therefore, as shown in FIG. 10, the second angle adjustment mechanism A2 performs angle adjustment about the second axis (Y) with respect to the second holding member 12 by the adjusting screw 17 with respect to the second holding member 12. Are configured.

また、曲面ミラー１の反射面の角度を調整してから固定用ネジ１３を締めることにより、調整後の姿勢を保持することが可能となる第２姿勢保持機構Ｂ２を構成している。   In addition, by adjusting the angle of the reflection surface of the curved mirror 1 and tightening the fixing screw 13, a second attitude holding mechanism B2 is configured which can hold the attitude after adjustment.

ここで、治具部材３１は第１保持部材１１を第２保持部材１２に対して調整を完了した後に外しても良いし、そのまま補強部材として残しておいてもよい。   Here, the jig member 31 may be removed after completing the adjustment of the first holding member 11 with respect to the second holding member 12, or may be left as it is as a reinforcing member.

さらに、第２保持部材１２には、図３に示すように、前後方向において、突出部１２ｅと同軸上にあり、かつ突出部１２ｅよりも前側に離間した位置に、左右１つずつの穴部１２ｋが形成されている。この穴部１２ｋは、上下方向に貫通し、かつ前後方向に比べて左右方向の口径が大きくなった長穴状になっている。   Furthermore, as shown in FIG. 3, the second holding member 12 has holes on the left and right sides at positions coaxial with the protrusion 12e in the front-rear direction and spaced apart to the front than the protrusion 12e. 12k is formed. The hole 12k penetrates in the vertical direction, and has an elongated hole shape whose diameter in the left-right direction is larger than that in the front-rear direction.

また、第２保持部材１２の穴部１２ｋの形成されている平面部１２ｍは、その左右方向に光軸から離間した辺縁部に垂直で下方向に延びた平面部１２ｎを有している。この平面部１２ｎには、左右方向において、穴部１２ｋと同軸上にあり、かつ左右方向に貫通した調整用ネジ穴部１２ｐが形成されている。   Further, the plane portion 12m in which the hole portion 12k of the second holding member 12 is formed has a plane portion 12n extending downward and perpendicular to the side edge portion separated from the optical axis in the left-right direction. An adjustment screw hole 12p coaxial with the hole 12k in the left-right direction and penetrating in the left-right direction is formed in the flat portion 12n.

こうして、反射面の角度及び位置を調整後に固定可能に保持している曲面ミラー１及び第１保持部材１１、第２保持部材１２を組み合わせて反射面保持機構とする。   In this way, the curved mirror 1 and the first holding member 11 and the second holding member 12 holding the angle and position of the reflecting surface in a fixed manner after adjustment are combined to form a reflecting surface holding mechanism.

「固定部材」
以上の反射面保持機構の下面側には、図５に示すように、固定部材２１が配置されている。この固定部材２１は、内周側に反射面保持機構を保持可能に形成されている。反射面保持機構は、固定部材２１の後側端部に配置されている。
固定部材２１は、前側の左右両端部に、屈折光学素子による結像光学系を内包する図示しないレンズ鏡筒に固定するための固定用係合部２１ａを有している。 "Fixing member"
As shown in FIG. 5, a fixing member 21 is disposed on the lower surface side of the above-described reflection surface holding mechanism. The fixing member 21 is formed on the inner peripheral side so as to be capable of holding the reflecting surface holding mechanism. The reflective surface holding mechanism is disposed at the rear end of the fixing member 21.
The fixing member 21 has fixing engaging portions 21 a at the left and right end portions on the front side for fixing to a lens barrel (not shown) containing an imaging optical system with a refractive optical element.

固定部材２１には、第２保持部材１２の穴部１２ｋに対応する位置に、左右１つずつの固定用ネジ穴部２１ｋが形成されている。この固定用ネジ穴部２１ｋは、固定部材２１の端部上に突出した突出部２１ｂの軸心に形成されている。
固定用ネジ２２を穴部１２ｋに挿入して固定用ネジ穴部２１ｋと螺合することにより、固定部材２１に対して第２保持部材１２の移動を制限している。 The fixing member 21 is formed with left and right fixing screw holes 21 k at positions corresponding to the holes 12 k of the second holding member 12. The fixing screw hole portion 21 k is formed at the axial center of the projecting portion 21 b protruding above the end portion of the fixing member 21.
The movement of the second holding member 12 with respect to the fixing member 21 is restricted by inserting the fixing screw 22 into the hole 12 k and screwing it with the fixing screw hole 21 k.

なお、固定用ネジ２２で結合する際には、スプリングワッシャ２３と平ワッシャ２４を先に固定用ネジ２２に嵌め込み、第２保持部材１２と固定部材２１の間に平ワッシャ２５を挟んでから固定用ネジ２２を固定用ネジ穴部２１ｋと螺合する。   When connecting with the fixing screw 22, the spring washer 23 and the flat washer 24 are first inserted into the fixing screw 22, and the flat washer 25 is sandwiched between the second holding member 12 and the fixing member 21 before fixing. The screw 22 is screwed into the fixing screw hole 21k.

そして、固定部材２１には、第２保持部材１２の調整用ネジ穴部１２ｐに対応する位置に、穴部は無く壁面である壁部２１ｐが存在している。この調整用ネジ穴部２１ｐに調整用ネジ２６が螺合されると、調整用ネジ２６が調整用ネジ穴部１２ｐを貫通して、その先端部が固定部材２１の壁部２１ｐを押す。   In the fixing member 21, a wall 21 p which is a wall without a hole is present at a position corresponding to the adjustment screw hole 12 p of the second holding member 12. When the adjustment screw 26 is screwed into the adjustment screw hole 21p, the adjustment screw 26 passes through the adjustment screw hole 12p, and the tip thereof pushes the wall 21p of the fixing member 21.

よって、図６に示すように、調整用ネジ２６により第２保持部材１２を固定部材２１に対してＸ軸方向へ平行移動させることにより、反射面の位置の調整を行う第１位置調整機構Ｃ１を構成している。   Therefore, as shown in FIG. 6, by moving the second holding member 12 in parallel in the X axis direction with respect to the fixing member 21 by the adjusting screw 26, the first position adjusting mechanism C1 which adjusts the position of the reflecting surface Are configured.

また、図１１に示すように、反射面の位置が決定してから固定用ネジ２２を締めることにより、調整後の姿勢を保持することが可能となる第３姿勢保持機構Ｂ３を構成している。   Further, as shown in FIG. 11, by fixing the fixing screw 22 after the position of the reflecting surface is determined, a third posture holding mechanism B3 which can hold the posture after adjustment is configured. .

以上のように、曲面ミラー１の調整装置は、第１軸線（Ｘ）を回転中心とする第１角度調整機構Ａ１、第２軸線（Ｙ）を回転中心とする第２角度調整機構Ａ２、第１姿勢保持機構Ｂ１、第２姿勢保持機構Ｂ２、第３姿勢保持機構Ｂ３、第１軸線（Ｘ）方向への第１位置調整機構Ｃ１を備えている。   As described above, the adjustment device of the curved mirror 1 includes the first angle adjustment mechanism A1 whose center of rotation is the first axis (X), the second angle adjustment mechanism A2 whose center of rotation is the second axis (Y), and A first attitude holding mechanism B1, a second attitude holding mechanism B2, a third attitude holding mechanism B3, and a first position adjusting mechanism C1 in the direction of the first axis (X) are provided.

以上、曲面ミラー１の調整装置によれば、第１角度調整機構Ａ１、第２角度調整機構Ａ２、第１姿勢保持機構Ｂ１、第２姿勢保持機構Ｂ２、第３姿勢保持機構Ｂ３、及び第１位置調整機構Ｃ１を互いに独立して備えることで、反射面の角度、姿勢及び位置をそれぞれ独自に調整でき、より高精度で容易に調整することができる。   As described above, according to the adjusting device of the curved mirror 1, the first angle adjusting mechanism A1, the second angle adjusting mechanism A2, the first attitude holding mechanism B1, the second attitude holding mechanism B2, the third attitude holding mechanism B3, and the first By providing the position adjusting mechanisms C1 independently of each other, the angle, attitude, and position of the reflecting surface can be adjusted independently, and can be easily adjusted with higher accuracy.

（変形例１）
また、第１保持部材１１と第２保持部材１２の間にあるワッシャ１６及び／または第２保持部材１２と固定部材２１との間にある平ワッシャ２５は、そのワッシャの厚さや挟む枚数を変えることにより、反射面の上下方向の位置の調整を行うことが可能な第２位置調整機構としての機能を持たせることも可能である。 (Modification 1)
Further, the washer 16 between the first holding member 11 and the second holding member 12 and / or the flat washer 25 between the second holding member 12 and the fixing member 21 change the thickness and the number of the washers. Thus, it is also possible to provide a function as a second position adjusting mechanism capable of adjusting the position of the reflecting surface in the vertical direction.

その際に、高さ調整機構は、Ｘ軸方向において、同軸上で、かつ左右方向に離間して二箇所あるため、一方に挟むワッシャの数や厚みを他方に対して異ならせることにより、鏡軸を回転軸として反射面を回動させることも可能である。   At that time, the height adjustment mechanism is provided coaxially in the X-axis direction and at two places separated in the left-right direction, so that the number and thickness of the washers sandwiched in one is different from the other It is also possible to turn the reflective surface about the axis of rotation.

（変形例２）
以上の調整装置においては、光軸と直交する軸線を第１軸線、光軸と直交して、かつ第１軸線と直交する軸線を第２軸線としたが、これに限らず、光軸と直交する軸線と平行な軸線を第１軸線、光軸と直交して、かつ第１軸線と直交する軸線と平行な軸線を第２軸線としてもよい。
さらに、その他、具体的な細部構造等について適宜に変更可能であることは勿論である。 (Modification 2)
In the above adjustment device, an axis orthogonal to the optical axis is taken as a first axis, an axis orthogonal to the optical axis, and an axis orthogonal to the first axis as a second axis, but the present invention is not limited thereto. An axis parallel to the first axis may be a first axis, an axis perpendicular to the optical axis, and an axis parallel to an axis orthogonal to the first axis may be a second axis.
Furthermore, it is needless to say that other specific details can be appropriately changed.

次に、本発明の実施形態を説明する。
なお、以下の実施形態では、前述した曲面ミラーの調整装置で説明した部材と同一の部材には同一符号を付す。 Next, an embodiment of the present invention will be described.
In the following embodiments, the same members as the members described in the above-described adjustment apparatus for a curved mirror are given the same reference numerals.

（実施形態１）
この実施形態は固定部材２１とレンズ鏡筒が別部材の場合に対応する。 (Embodiment 1)
This embodiment corresponds to the case where the fixing member 21 and the lens barrel are separate members.

図１２から図１５は本発明を適用した投射光学系の取付構造の一実施形態の構成として鏡筒と固定部材が別体型の場合を示すもので、前述した曲面ミラーの調整装置で説明したとおり、１は曲面ミラー、２１は固定部材であって、４１は投射側レンズ鏡筒、４２は本体側レンズ鏡筒である。   FIG. 12 to FIG. 15 show the case where the lens barrel and the fixing member are separate types as a configuration of an embodiment of the mounting structure of the projection optical system to which the present invention is applied, as described in the curved mirror adjustment device described above. Reference numeral 1 denotes a curved mirror, 21 denotes a fixing member, 41 denotes a projection side lens barrel, and 42 denotes a main body side lens barrel.

実施形態においては、図示のように、屈折光学系と曲面ミラー１より構成される投射光学系と、その屈折光学系を内包するレンズ鏡筒４１・４２と、曲面ミラー１の角度及び位置を微調整可能に支持しているミラー保持部材１１・１２と、を有する投射光学系、及びその投射光学系を内包する鏡筒となっている。
そして、固定部材２１は、レンズ鏡筒４１・４２とミラー保持部材１１・１２とを連結して、レンズ鏡筒４１・４２に対する曲面ミラー１の光軸方向の位置を規定して固定する。 In the embodiment, as shown in the figure, the angle and position of the curved mirror 1 and the projection optical system including the refractive optical system and the curved mirror 1, the lens barrels 41 and 42 including the refractive optical system, The projection optical system having the mirror holding members 11 and 12 which are adjustably supported, and the lens barrel including the projection optical system.
The fixing member 21 connects the lens barrels 41 and 42 and the mirror holding members 11 and 12 to define and fix the position of the curved mirror 1 with respect to the lens barrels 41 and 42 in the optical axis direction.

また、レンズ鏡筒４１・４２及び固定部材２１は次のように固定される。
すなわち、図１３及び図１５に示すように、レンズ鏡筒４１・４２には第一係合面４１Ａが形成されて、固定部材２１には第二係合面２１Ａが形成されている。
そして、これら第一係合面４１Ａ及び第二係合面２１Ａは、図１２及び図１４に示すように、対面状態で合わせた状態でビスやネジ等により固定されている。 The lens barrels 41 and 42 and the fixing member 21 are fixed as follows.
That is, as shown in FIGS. 13 and 15, the first engaging surface 41A is formed on the lens barrels 41 and 42, and the second engaging surface 21A is formed on the fixing member 21.
The first engagement surface 41A and the second engagement surface 21A are fixed by screws, screws or the like in a facing state, as shown in FIGS. 12 and 14.

ここで、第一係合面４１Ａ及び第二係合面２１Ａはレンズ光軸に対して直交する平面であり、図１２に示すように、第一係合面４１Ａは光軸方向において、投射光学系の全長の半分よりも投射側に位置している。 Here, the first engagement surface 41A and the second engagement surface 21A are planes orthogonal to the lens optical axis, and as shown in FIG. 12, the first engagement surface 41A is a projection optical system in the optical axis direction. It is located on the projection side more than half of the total length of the system.

具体的には、レンズ鏡筒は、投射側レンズ鏡筒４１と本体側レンズ鏡筒４２とがネジやビス等を介して固定することにより構成されている。
そして、投射側レンズ鏡筒４１の本体側端部の外周面に光軸と直交方向の第一フランジ部４１Ｆが形成されている。この第一フランジ部４１Ｆの投射側端面が第一係合面４１Ａとなっている。 Specifically, the lens barrel is configured by fixing the projection side lens barrel 41 and the main body side lens barrel 42 via screws or screws.
A first flange portion 41F in the direction orthogonal to the optical axis is formed on the outer peripheral surface of the main body side end portion of the projection side lens barrel 41. The projection-side end surface of the first flange portion 41F is a first engagement surface 41A.

また、固定部材２１の本体側端部に光軸と直交方向の第二フランジ部２１Ｆが形成されている。この第二フランジ部２１Ｆの本体側端面が第二係合面２１Ａとなっている。
そして、第二フランジ部２１Ｆには、図１５に示すように、円形の開口部２１Ｂが形成されている。 In addition, a second flange portion 21F in the direction orthogonal to the optical axis is formed at the main body side end of the fixing member 21. An end surface on the main body side of the second flange portion 21F is a second engagement surface 21A.
And as shown in FIG. 15, the circular opening part 21B is formed in the 2nd flange part 21F.

ここで、以上の第一フランジ部４１Ｆ及び第二フランジ部２１Ｆの最大外径は、図示のように、レンズ鏡筒４１・４２の最大外径よりも小さく、各係合面４１Ａ・２１Ａには、光軸と平行方向へ形成された鏡筒固定用のネジ穴部をそれぞれ複数有する。   Here, the maximum outer diameters of the first flange portion 41F and the second flange portion 21F described above are smaller than the maximum outer diameters of the lens barrels 41 and 42, as shown in FIG. A plurality of screw holes for lens barrel fixing, which are formed in a direction parallel to the optical axis, are provided.

なお、ミラー保持部材１１・１２は、前述したように、曲面ミラー１を内包し、曲面ミラー１を光軸と直交する二つの軸をそれぞれ回転軸として回動可能であり、かつ回動させた状態で姿勢を維持したまま固定可能であり、かつ各軸方向へシフト調整も可能な構成を有している。   As described above, the mirror holding members 11 and 12 include the curved mirror 1, and the curved mirror 1 can be rotated with two axes orthogonal to the optical axis as rotation axes, respectively. It can be fixed while maintaining its posture in the state, and has a configuration that allows shift adjustment in each axial direction.

前述したように、一方の先端にミラー保持部材１１・１２が固定された固定部材２１は、他方の先端に形成された第二係合面２１Ａを、投射側レンズ鏡筒４１の第一フランジ部４１Ｆの投射側に形成された第一係合面４１Ａと対面させる。
そして、第二係合面２１Ａの開口部２１Ｂに投射側レンズ鏡筒４１を本体側から挿入して、第一係合面４１Ａと第二係合面２１Ａとが接触した状態でビスやネジにより固定されることにより、固定部材２１はレンズ鏡筒４１・４２へ取り付けられる。 As described above, the fixing member 21 in which the mirror holding members 11 and 12 are fixed to one end has the second engagement surface 21A formed at the other end, the first flange portion of the projection-side lens barrel 41 It is made to face the first engagement surface 41A formed on the projection side of 41F.
Then, the projection-side lens barrel 41 is inserted from the main body side into the opening 21B of the second engagement surface 21A, and the first engagement surface 41A and the second engagement surface 21A are in contact with each other by screws or screws. By being fixed, the fixing member 21 is attached to the lens barrels 41 and 42.

以上において、投射側レンズ鏡筒４１の第一係合面４１Ａ及び固定部材２１の第二係合面２１Ａは、各レンズ鏡筒４１・４２を係合して鏡筒とした際に内部に配置される屈折光学系と、レンズ鏡筒４１・４２の投射側に配置される曲面ミラー１とで形成される投射光学系の全長に対して、少なくとも半分よりも投射側に配置される。   In the above, the first engagement surface 41A of the projection-side lens barrel 41 and the second engagement surface 21A of the fixed member 21 are disposed inside when the lens barrels 41 and 42 are engaged to form a barrel. The total length of the projection optical system formed by the refracting optical system and the curved mirror 1 disposed on the projection side of the lens barrels 41 and 42 is disposed on the projection side more than at least half.

ここで、具体的な数値として例えば、屈折光学系の全長１１５．１ｍｍ、投射光学系の全長１７６．１ｍｍ、最も本体側のレンズ面から第一係合面４１Ａまでの光軸上の長さ８９．６ｍｍ、第一係合面４１Ａから曲面ミラー１表面までの光軸上の長さ８６．５ｍｍである。   Here, as specific numerical values, for example, the total length 115.1 mm of the refractive optical system, the total length 176.1 mm of the projection optical system, the length 89 on the optical axis from the lens surface closest to the main body to the first engagement surface 41A. 6 mm, and the length on the optical axis from the first engagement surface 41A to the surface of the curved mirror 1 is 86.5 mm.

そして、投射光学系をプロジェクター本体へ取付けて本体側に設置されたライトバルブからの画像光を投射光学系へ入射させた際に、投射光学系内の屈折光学系一部の屈折光学素子の屈折作用により、図１２に示すように、屈折光学系内部に一度結像して第一中間像Ｐ１を形成する。   Then, when the projection optical system is attached to the projector main body and the image light from the light valve installed on the main body side is made incident to the projection optical system, refraction of the refractive optical element of a part of the refractive optical system in the projection optical system As a result, as shown in FIG. 12, an image is formed once inside the dioptric system to form a first intermediate image P1.

更に、屈折光学系のその他の屈折光学素子の屈折作用により、屈折光学系と曲面ミラー１との間でも結像して第二中間像を形成した際に、第一中間像Ｐ１よりも投射側に第一係合面４１Ａ及び第二係合面２１Ａが配置される。   Furthermore, when the second intermediate image is formed by forming an image between the refractive optical system and the curved mirror 1 by the refracting action of another refractive optical element of the refractive optical system, the projection side of the first intermediate image P1 The first engagement surface 41A and the second engagement surface 21A are disposed on the

ここで、具体的な数値として例えば、最も本体側のレンズ面から第一中間像Ｐ１までの光軸上の長さ６８．１ｍｍである。   Here, as a specific numerical value, for example, the length on the optical axis from the lens surface closest to the main body to the first intermediate image P1 is 68.1 mm.

そして、投射側レンズ鏡筒４１の第一係合面４１Ａと固定部材２１の第二係合面２１Ａとの間に、図１３及び図１５に示すように、第二係合面２１Ａの開口部２１Ｂと略同一の形状の開口部を有するワッシャ４３が少なくとも一枚挿入されている。   Then, as shown in FIGS. 13 and 15, the opening of the second engagement surface 21A between the first engagement surface 41A of the projection-side lens barrel 41 and the second engagement surface 21A of the fixed member 21. At least one washer 43 having an opening of substantially the same shape as that of 21 B is inserted.

このワッシャ４３は、位置（距離）調整機構を構成するもので、具体的な数値として例えば、０．０１〜０．１０ｍｍの間で異なる厚みを有する複数の種類を持っている。
このようなワッシャ４３を入れ替える、あるいは一枚以上重ねて入れる等で厚さを調整することで、レンズ鏡筒４１・４２と固定部材２１との光軸方向の位置（距離）を調整可能になっている。 The washer 43 constitutes a position (distance) adjusting mechanism, and has a plurality of types having different thicknesses, for example, from 0.01 to 0.10 mm as specific numerical values.
By adjusting the thickness by replacing such washers 43 or inserting one or more sheets, the position (distance) in the optical axis direction of the lens barrels 41 and 42 and the fixing member 21 can be adjusted. ing.

以上、実施形態の曲面ミラー１のミラー保持部材１１・１２とレンズ鏡筒４１・４２とを固定部材２１で連結する投射光学系の取付構造によれば、レンズ鏡筒４１・４２の第一係合面４１Ａと固定部材２１の第二係合面２１Ａを合わせて固定した状態で、第一係合面４１Ａを光軸方向において投射光学系の全長の半分よりも投射側に位置させたため、固定部材２１とレンズ鏡筒４１・４２との結合位置をより曲面ミラー１側へ近づけて、固定部材２１自体の製造誤差や組立誤差による曲面ミラー１の位置ズレを抑制することができる。   As described above, according to the mounting structure of the projection optical system in which the mirror holding members 11 and 12 of the curved mirror 1 of the embodiment and the lens barrels 41 and 42 are connected by the fixing member 21, the first engagement of the lens barrels 41 and 42 is performed. In the state where the joint surface 41A and the second engagement surface 21A of the fixing member 21 are aligned and fixed, the first engagement surface 41A is positioned on the projection side more than half the total length of the projection optical system in the optical axis direction. By bringing the coupling position of the member 21 and the lens barrels 41 and 42 closer to the curved mirror 1 side, it is possible to suppress the positional deviation of the curved mirror 1 due to a manufacturing error or an assembly error of the fixing member 21 itself.

（実施形態２）
この実施形態２は、固定部材２１と投射側レンズ鏡筒４１が一体成型とした場合に対応する。 Second Embodiment
The second embodiment corresponds to the case where the fixing member 21 and the projection side lens barrel 41 are integrally formed.

図１６から図１９は実施形態２として鏡筒と固定部材が一体型の場合を示すもので、前述した実施形態１と同様、１は曲面ミラー、２１は固定部材、４１は投射側レンズ鏡筒、４２は本体側レンズ鏡筒である。   FIGS. 16 to 19 show the case where the lens barrel and the fixing member are integrated as Embodiment 2. As in Embodiment 1, 1 is a curved mirror, 21 is a fixing member, and 41 is a projection-side lens barrel. , 42 is a main body side lens barrel.

すなわち、実施形態２では、図１７及び図１９に示すように、投射側レンズ鏡筒４１と固定部材２１が、前述した実施形態１における第一フランジ部４１Ｆの第一係合面４１Ａと第二フランジ部２１Ｆの第二係合面２１Ａとを接触した際の形状で一体成型されている。   That is, in the second embodiment, as shown in FIGS. 17 and 19, the projection-side lens barrel 41 and the fixing member 21 are the first engagement surface 41A of the first flange portion 41F and the second in the first embodiment described above. It is integrally molded in the shape at the time of contacting with the 2nd engaging surface 21A of flange 21F.

ここで、固定部材２１と投射側レンズ鏡筒４１を一体成型する場合、製造時の都合により固定部材２１の下部の一部を切り欠くため、その切り欠き部が縦断面の図１７においては現れない。   Here, in the case of integrally molding the fixing member 21 and the projection-side lens barrel 41, a part of the lower portion of the fixing member 21 is cut out for convenience of manufacturing, so the cutaway portion appears in FIG. Absent.

そして、本体側レンズ鏡筒４２の投射側端部の外周面に光軸と直交方向の第三フランジ部４２Ｆが形成されている。この第三フランジ部４２Ｆの投射側端面が第三係合面４２Ａとなっている。   A third flange portion 42F in the direction orthogonal to the optical axis is formed on the outer peripheral surface of the projection side end of the main body side lens barrel 42. The projection-side end surface of the third flange portion 42F is a third engagement surface 42A.

また、投射側レンズ鏡筒４１の本体側端部の外周面に光軸と直交方向の第四フランジ部４４Ｆが形成されている。この第四フランジ部４４Ｆの本体側端面が第四係合面４４Ａとなっている。   Further, a fourth flange portion 44F in the direction orthogonal to the optical axis is formed on the outer peripheral surface of the main body side end of the projection side lens barrel 41. An end surface on the main body side of the fourth flange portion 44F is a fourth engagement surface 44A.

ここで、以上の第三フランジ部４２Ｆ及び第四フランジ部４４Ｆの最大外径は、図示のように、レンズ鏡筒４１・４２の最大外径よりも小さく、各係合面４２Ａ・４４Ａには、光軸と平行方向へ形成された鏡筒固定用のネジ穴部を複数有する。   Here, the maximum outer diameters of the third flange portion 42F and the fourth flange portion 44F described above are smaller than the maximum outer diameters of the lens barrels 41 and 42, as shown in FIG. A plurality of screw holes for lens barrel fixing formed in a direction parallel to the optical axis.

以上のレンズ鏡筒４１・４２は次のように固定する。
すなわち、固定部材２１と一体の投射側レンズ鏡筒４１の第四フランジ部４４Ｆの第四係合面４４Ａと、本体側レンズ鏡筒４２の第三フランジ部４２Ｆの第三係合面４２Ａとを対面させて接触した状態でビスやネジにより固定する。 The above lens barrels 41 and 42 are fixed as follows.
That is, the fourth engaging surface 44A of the fourth flange portion 44F of the projection side lens barrel 41 integrated with the fixing member 21 and the third engaging surface 42A of the third flange portion 42F of the main body side lens barrel 42 Fix with screws or screws while facing each other.

以上において、固定部材２１と一体の投射側レンズ鏡筒４１の第四係合面４４Ａ及び本体側レンズ鏡筒４１の第三係合面４２Ａは、各レンズ鏡筒４１・４２を係合して鏡筒とした際に内部に配置される屈折光学系と、レンズ鏡筒４１・４２の投射側に配置される曲面ミラー１とで形成される投射光学系の全長に対して、少なくとも半分よりも投射側に配置される。   In the above, the fourth engagement surface 44A of the projection side lens barrel 41 and the third engagement surface 42A of the main body side lens barrel 41, which are integral with the fixing member 21, engage the respective lens barrels 41 and 42. At least half of the total length of the projection optical system formed by the dioptric system disposed inside when forming the barrel and the curved mirror 1 disposed on the projection side of the lens barrels 41 and 42 It is arranged on the projection side.

ここで、具体的な数値として例えば、屈折光学系の全長１１５．１ｍｍ、投射光学系の全長１７６．１ｍｍ、最も本体側のレンズ面から第三係合面４２Ａまでの光軸上の長さ９２．１ｍｍ、第三係合面４２Ａから曲面ミラー１表面までの光軸上の長さ８４ｍｍである   Here, as a specific numerical value, for example, the total length 115.1 mm of the refractive optical system, the total length 176.1 mm of the projection optical system, the length 92 on the optical axis from the lens surface closest to the main body to the third engagement surface 42A. .1 mm, length 84 mm on the optical axis from the third engaging surface 42A to the surface of the curved mirror 1

更に、屈折光学系のその他の屈折光学素子の屈折作用により、屈折光学系と曲面ミラー１との間でも結像して第二中間像を形成した際に、第一中間像Ｐ１よりも投射側に第三係合面４３Ａ及び第四係合面４４Ａが配置される。   Furthermore, when the second intermediate image is formed by forming an image between the refractive optical system and the curved mirror 1 by the refracting action of another refractive optical element of the refractive optical system, the projection side of the first intermediate image P1 The third engagement surface 43A and the fourth engagement surface 44A are disposed on the

ここで、具体的な数値として例えば、最も本体側のレンズ面から第一中間像Ｐ１までの光軸上の長さ６８．１ｍｍである。   Here, as a specific numerical value, for example, the length on the optical axis from the lens surface closest to the main body to the first intermediate image P1 is 68.1 mm.

そして、第三係合面４２Ａと第四係合面４４Ａとの間に、図１７及び図１９に示すように、ワッシャ４５が挿入される。   Then, a washer 45 is inserted between the third engagement surface 42A and the fourth engagement surface 44A, as shown in FIGS. 17 and 19.

このワッシャ４５は、実施形態１のワッシャ４３と同様に位置（距離）調整機構を構成するもので、具体的な数値として例えば、０．０１〜０．１０ｍｍの間で異なる厚みを有する複数の種類を持っている。
このようなワッシャ４５を入れ替える、あるいは一枚以上重ねて入れる等で厚さを調整することで、固定部材２１と一体の投射側レンズ鏡筒４１と本体側レンズ鏡筒４２との光軸方向の位置（距離）を調整可能になっている。 The washer 45 constitutes a position (distance) adjusting mechanism in the same manner as the washer 43 of the first embodiment, and a plurality of types having different thicknesses, for example, between 0.01 and 0.10 mm as specific numerical values. have.
By adjusting the thickness by replacing such washers 45 or inserting one or more sheets, etc., in the optical axis direction of the projection side lens barrel 41 and the main body side lens barrel 42 integrated with the fixing member 21 The position (distance) can be adjusted.

以上、実施形態２の曲面ミラー１のミラー保持部材１１・１２とレンズ鏡筒４１・４２とを固定部材２１で連結する投射光学系の取付構造によれば、本体側レンズ鏡筒４２の第三係合面４２Ａと、固定部材２１に一体の投射側レンズ鏡筒４１の第四係合面４４Ａを合わせて固定した状態で、第三係合面４２Ａを光軸方向において投射光学系の全長の半分よりも投射側に位置させたため、固定部材２１に一体の投射側レンズ鏡筒４１と本体側レンズ鏡筒４２との結合位置をより曲面ミラー１側へ近づけて、固定部材２１自体の製造誤差や組立誤差による曲面ミラー１の位置ズレを抑制することができる。   As described above, according to the mounting structure of the projection optical system in which the mirror holding members 11 and 12 of the curved mirror 1 of Embodiment 2 and the lens barrels 41 and 42 are connected by the fixing member 21, the third lens barrel 42 With the engaging surface 42A and the fourth engaging surface 44A of the projection side lens barrel 41 integrated with the fixing member 21 together and fixed, the third engaging surface 42A has a total length of the projection optical system in the optical axis direction. Because it is positioned on the projection side more than half, the coupling position of the projection side lens barrel 41 and the main body side lens barrel 42 integral with the fixing member 21 is brought closer to the curved mirror 1 side, and the manufacturing error of the fixing member 21 itself The positional deviation of the curved mirror 1 due to assembly errors can be suppressed.

（他の変形例）
以上の実施形態の他、具体的な細部構造等について適宜に変更可能であることは勿論である。 (Other modifications)
It is needless to say that concrete detailed structures and the like can be appropriately changed in addition to the above embodiment.

１ 曲面ミラー
２ 第１被係合部材
３ スプリングワッシャ
４ 調整用ネジ
５ 圧縮バネ
６ ビス
７ 板バネ
８ 板バネ
９ ビス
１１ ミラー保持部材
１２ ミラー保持部材
１３ 固定用ネジ
１４ スプリングワッシャ
１５ 平ワッシャ
１６ 平ワッシャ
１７ 調整用ネジ
１８ 圧縮バネ
２１ 固定部材
２１Ａ 第二係合面
２１Ｂ 開口部
２１Ｆ 第二フランジ部
２２ 固定用ネジ
２３ スプリングワッシャ
２４ 平ワッシャ
２５ 平ワッシャ
２６ 調整用ネジ
３１ 冶具部材
３２ 冶具固定用ネジ
４１ 投射側レンズ鏡筒
４１Ａ 第一係合面
４１Ｆ 第一フランジ部
４２ 本体側レンズ鏡筒
４２Ａ 第三係合面
４２Ｆ 第三フランジ部
４３ 距離調整機構（ワッシャ）
４４Ａ 第四係合面
４４Ｆ 第四フランジ部
４５ 距離調整機構（ワッシャ）
Ａ１ 第１角度調整機構
Ａ２ 第２角度調整機構
Ｂ１ 第１姿勢保持機構
Ｂ２ 第２姿勢保持機構
Ｂ３ 第３姿勢保持機構
Ｃ１ 第１位置調整機構 Reference Signs List 1 curved mirror 2 first engaged member 3 spring washer 4 adjustment screw 5 compression spring 6 screw 7 plate spring 8 plate spring 9 screw 11 mirror holding member 12 mirror holding member 13 fixing screw 14 spring washer 15 flat washer 16 flat washer 16 flat washer Washer 17 Adjustment screw 18 Compression spring 21 Fixing member 21A Second engagement surface 21B Opening 21F Second flange 22 Fixing screw 23 Spring washer 24 Flat washer 25 Flat washer 26 Adjustment screw 31 Jig member 32 Jig fixing screw 41 Projection-side lens barrel 41A First engagement surface 41F First flange portion 42 Body side lens barrel 42A Third engagement surface 42F Third flange portion 43 Distance adjustment mechanism (washer)
44A Fourth engagement surface 44F Fourth flange 45 Distance adjustment mechanism (washer)
A1 First Angle Adjustment Mechanism A2 Second Angle Adjustment Mechanism B1 First Attitude Holding Mechanism B2 Second Attitude Holding Mechanism B3 Third Attitude Holding Mechanism C1 First Position Adjustment Mechanism

Claims (16)

曲面ミラーを保持するミラー保持部材とレンズ鏡筒とを固定部材で連結する投射光学系の取付構造であって、
前記レンズ鏡筒に第一係合面を設けて、
前記固定部材に第二係合面を設け、
前記第一係合面及び第二係合面を合わせて固定した状態で、前記第一係合面が光軸方向において前記投射光学系の全長の半分よりも投射側に位置していることを特徴とする投射光学系の取付構造。 A mounting structure of a projection optical system in which a mirror holding member for holding a curved mirror and a lens barrel are connected by a fixing member,
Providing a first engagement surface on the lens barrel;
Providing a second engagement surface on the fixing member;
In a state in which the first engagement surface and the second engagement surface are fixed together, the first engagement surface is positioned on the projection side in the optical axis direction rather than half of the total length of the projection optical system. Features of the projection optical system mounting structure. 前記第二係合面に開口部を設け、
前記開口部に前記レンズ鏡筒の投射側を挿入するように前記固定部材を前記レンズ鏡筒と光軸上の位置を重複させながら前記第一係合面と第二係合面とを接触させることを特徴とする請求項１に記載の投射光学系の取付構造。 Providing an opening in the second engagement surface;
The fixing member is brought into contact with the first engagement surface and the second engagement surface while overlapping the position on the optical axis with the lens barrel such that the projection side of the lens barrel is inserted into the opening. The attachment structure of the projection optical system according to claim 1, 前記第一係合面と第二係合面は互いに光軸と直交する面であることを特徴とする請求項１または２に記載の投射光学系の取付構造。   The projection optical system mounting structure according to claim 1 or 2, wherein the first engagement surface and the second engagement surface are surfaces orthogonal to each other with the optical axis. 前記第一係合面と第二係合面の間には、各々の係合面の光軸方向の距離を調整する調整機構が備えられていることを特徴とする請求項１から３のいずれか一項に記載の投射光学系の取付構造。   The adjustment mechanism which adjusts the distance of the optical axis direction of each engagement surface is provided between the said 1st engagement surface and the 2nd engagement surface, The any one of the Claims 1 to 3 characterized by the above-mentioned. The mounting structure of the projection optical system according to any one of the preceding claims. 前記第二係合面よりも本体側には、前記固定部材が形成されないことを特徴とする請求項１から４のいずれか一項に記載の投射光学系の取付構造。   The projection optical system mounting structure according to any one of claims 1 to 4, wherein the fixing member is not formed closer to the main body than the second engagement surface. 前記第一係合面が、光軸方向における前記レンズ鏡筒内部の屈折光学系の内部で形成される中間像の光軸上の位置よりも投射側に位置していることを特徴とする請求項１から５のいずれか一項に記載の投射光学系の取付構造。   The first engagement surface is located on the projection side of a position on an optical axis of an intermediate image formed inside the dioptric system inside the lens barrel in the optical axis direction. The attachment structure of the projection optical system as described in any one of claim 1 to 5. 前記第一係合面と第二係合面の外形が、前記レンズ鏡筒の最大外径よりも小さいことを特徴とする請求項１から６のいずれか一項に記載の投射光学系の取付構造。 The projection optical system according to any one of claims 1 to 6, wherein the outer shapes of the first engagement surface and the second engagement surface are smaller than the maximum outer diameter of the lens barrel. Construction. 曲面ミラーを保持するミラー保持部材とレンズ鏡筒とを固定部材で連結する投射光学系の取付構造であって、
前記レンズ鏡筒は、本体側の本体側レンズ鏡筒と投射側の投射側レンズ鏡筒とに分離可能であり、
前記投射側レンズ鏡筒の投射側に前記固定部材を一体的に設け、
前記本体側レンズ鏡筒に第三係合面を設けて、
前記投射側レンズ鏡筒に第四係合面を設け、
前記第三係合面及び第四係合面を合わせて固定した状態で、前記第三係合面が光軸方向において前記投射光学系の全長の半分よりも投射側に位置していることを特徴とする投射光学系の取付構造。 A mounting structure of a projection optical system in which a mirror holding member for holding a curved mirror and a lens barrel are connected by a fixing member,
The lens barrel can be separated into a main body side lens barrel on the main body side and a projection side lens barrel on the projection side,
The fixing member is integrally provided on the projection side of the projection side lens barrel;
Providing a third engagement surface on the body side lens barrel,
Providing a fourth engagement surface on the projection side lens barrel;
In a state in which the third engagement surface and the fourth engagement surface are fixed together, the third engagement surface is positioned on the projection side more than half the total length of the projection optical system in the optical axis direction. Features of the projection optical system mounting structure. 前記第三係合面と第四係合面は互いに光軸と直交する面であることを特徴とする請求項８に記載の投射光学系の取付構造。   9. The projection optical system mounting structure according to claim 8, wherein the third engagement surface and the fourth engagement surface are surfaces orthogonal to the optical axis. 前記第三係合面と第四係合面の間には、各々の係合面の光軸方向の距離を調整する調整機構が備えられていることを特徴とする請求項８または９に記載の投射光学系の取付構造。   The adjusting mechanism which adjusts the distance of the optical axis direction of each engagement surface is provided between the said 3rd engagement surface and the 4th engagement surface, The 8 or 9 characterized by the above-mentioned. Mounting structure of the projection optical system. 前記調整機構はワッシャであることを特徴とする請求項４または１０に記載の投射光学系の取付構造。   11. The projection optical system mounting structure according to claim 4, wherein the adjustment mechanism is a washer. 前記第四係合面よりも本体側には、前記固定部材が形成されないことを特徴とする請求項８から１０のいずれか一項に記載の投射光学系の取付構造。 The projection optical system mounting structure according to any one of claims 8 to 10 , wherein the fixing member is not formed on the main body side of the fourth engaging surface. 前記第三係合面が、光軸方向における前記レンズ鏡筒内部の屈折光学系の内部で形成される中間像の光軸上の位置よりも投射側に位置していることを特徴とする請求項８から１０のいずれか一項に記載の投射光学系の取付構造。 The third engaging surface is positioned on the projection side of a position on an optical axis of an intermediate image formed inside the dioptric system inside the lens barrel in the optical axis direction. mounting structure of a projection optical system according to any one of paragraphs 8 to 10. 前記第三係合面と第四係合面の外形が、前記レンズ鏡筒の最大外径よりも小さいことを特徴とする請求項８から１０のいずれか一項に記載の投射光学系の取付構造。 The projection optical system according to any one of claims 8 to 10 , wherein the outer shapes of the third engagement surface and the fourth engagement surface are smaller than the maximum outer diameter of the lens barrel. Construction. 前記ミラー保持部材は、前記曲面ミラーを、前記レンズ鏡筒内部の屈折光学系の光軸に対して角度及び位置を調整可能に支持していることを特徴とする請求項１から１４のいずれか一項に記載の投射光学系の取付構造。   15. The mirror holding member according to any one of claims 1 to 14, wherein the curved mirror is supported so that its angle and position can be adjusted with respect to the optical axis of the refractive optical system inside the lens barrel. The attachment structure of the projection optical system according to one item. 請求項４に記載の前記調整機構を構成するワッシャと第一係合面及び第二係合面が略同一形状、または請求項１０に記載の前記調整機構を構成するワッシャと第三係合面及び第四係合面が略同一形状であることを特徴とする請求項１１に記載の投射光学系の取付構造。 A washer constituting the adjusting mechanism according to claim 4 and a first engaging surface and a second engaging surface have substantially the same shape, or a washer constituting the adjusting mechanism according to claim 10 and a third engaging surface The projection optical system mounting structure according to claim 11, wherein the fourth engagement surface has substantially the same shape.
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