JP2012008187A

JP2012008187A - Projector

Info

Publication number: JP2012008187A
Application number: JP2010141455A
Authority: JP
Inventors: Takashi Saegusa; 貴志三枝; Makoto Furusawa; 真古澤; Takuma Okamuro; 琢磨岡室; Osamu Ishibashi; 治石橋; Shingo Otsuka; 紳悟大塚; Kunihisa Nakamura; 訓久中村
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 2010-06-22
Filing date: 2010-06-22
Publication date: 2012-01-12

Abstract

PROBLEM TO BE SOLVED: To provide a projector with which the position deviation of a reflective light modulation apparatus can be suppressed.SOLUTION: A projector 1 has a reflective light modulation device 4, a reflective polarization plate 3, a prism 7, and a supporting body 6 and further includes a connecting member 8 fixed on the prism 7 and a fixation member 9 provided between the connecting member 8 and the supporting body 6 and fixing the connecting member 8 and the supporting body 6. The connecting member 8 has a insertion part 811A in which a part of the fixation member 9 is inserted. The fixation member 9 has a projecting part 91 inserting into the insertion part 811A and an abutting surface 921 on which it abuts with the supporting body 6.

Description

本発明は、プロジェクターに関する。 The present invention relates to a projector.

従来、Ｒ（赤），Ｇ（緑），Ｂ（青）の３つの色光をそれぞれ変調するＬＣＯＳ(Liquid Crystal On Silicon)等の３つの反射型光変調装置と、各反射型光変調装置にて変調された各色光を合成する色合成光学装置と、合成された光束を投射する投射レンズとを備えたプロジェクターが知られている（例えば、特許文献１参照）。
特許文献１に記載のプロジェクターでは、反射型光変調装置及び色合成光学装置の他、入射した光束を互いに偏光方向が直交する各直線偏光光に偏光分離する３つのワイヤーグリッドと、反射型光変調装置及びワイヤーグリッドを支持し、色合成光学装置の３つの光入射面にそれぞれ接着剤にて固定される３つの支持体とを備える。
支持体は、三角柱状の中空部材で構成され、各側面にそれぞれ反射型光変調装置及びワイヤーグリッドが取り付けられる。 Conventionally, three reflective light modulators such as LCOS (Liquid Crystal On Silicon) that modulate three color lights of R (red), G (green), and B (blue), respectively, and each reflective light modulator There is known a projector including a color synthesis optical device that synthesizes each modulated color light and a projection lens that projects a synthesized light beam (see, for example, Patent Document 1).
In the projector described in Patent Document 1, in addition to the reflection type light modulation device and the color synthesis optical device, three wire grids that separate and split the incident light beam into linearly polarized lights whose polarization directions are orthogonal to each other, and reflection type light modulation The apparatus and the wire grid are supported, and three supports are respectively fixed to the three light incident surfaces of the color synthesis optical apparatus with an adhesive.
The support is composed of a triangular prism-shaped hollow member, and a reflective light modulation device and a wire grid are attached to each side surface.

ところで、プロジェクターでは、鮮明な画像を得るために、各反射型光変調装置は、投射レンズのバックフォーカス位置に必ずなければならない。また、より鮮明な画像を得るために、各反射型光変調装置間での画素ずれの発生を防止する必要がある。このため、各支持体を色合成光学装置に対して固定する際には、各支持体を移動させて、各反射型光変調装置を投射レンズのバックフォーカス位置に正確に配置するフォーカス調整、及び、各反射型光変調装置の画素を一致させるアライメント調整を高精度に行う必要がある。 By the way, in the projector, in order to obtain a clear image, each reflection type light modulation device must be in the back focus position of the projection lens. In addition, in order to obtain a clearer image, it is necessary to prevent occurrence of pixel shift between the reflection type light modulation devices. For this reason, when fixing each support to the color synthesizing optical device, the focus adjustment is performed by moving each support to accurately place each reflective light modulation device at the back focus position of the projection lens, and Therefore, it is necessary to perform alignment adjustment with high accuracy so as to match the pixels of each reflection type light modulation device.

特開２００９−３６８１９号公報JP 2009-36819 A

しかしながら、特許文献１に記載のプロジェクターでは、位置調整（フォーカス調整及びアライメント調整）後、色合成光学装置の光入射面と支持体との隙間が大きくなった場合には、当該隙間に充填する接着剤の量も多くなる。このように、接着剤の量が多くなった場合には、接着剤の硬化時の収縮も大きくなる。
すなわち、位置調整により各反射型光変調装置を所望の位置に位置付けた後、接着剤を硬化させて色合成光学装置に対して支持体を固定する際に、各反射型光変調装置が所望の位置からずれてしまう、という問題がある。 However, in the projector described in Patent Document 1, when the gap between the light incident surface of the color synthesizing optical device and the support becomes large after position adjustment (focus adjustment and alignment adjustment), the adhesive filling the gap is filled. The amount of the agent also increases. Thus, when the amount of the adhesive increases, the shrinkage at the time of curing of the adhesive also increases.
That is, after positioning each reflective light modulation device at a desired position by position adjustment, when the adhesive is cured and the support is fixed to the color synthesis optical device, each reflective light modulation device is There is a problem that it is displaced from the position.

本発明の目的は、反射型光変調装置の位置ずれを抑制できるプロジェクターを提供することにある。 The objective of this invention is providing the projector which can suppress the position shift of a reflection type light modulation apparatus.

本発明のプロジェクターは、複数の色光を色光毎にそれぞれ変調する複数の反射型光変調装置と、前記複数の反射型光変調装置に対してそれぞれ傾斜して配設され、入射した前記複数の色光をそれぞれ偏光分離する複数の反射型偏光板と、前記複数の反射型光変調装置にて変調され前記複数の反射型偏光板にて偏光分離された各色光を合成する色合成光学装置と、前記色合成光学装置に固定される接続部材と、前記反射型光変調装置及び前記反射型偏光板を支持する支持体と、前記接続部材及び前記支持体間に介在し、前記接続部材及び前記支持体を固定する固定部材とを備え、前記接続部材及び前記支持体のいずれか一方は、前記固定部材の一部が挿通される挿通部を有し、前記固定部材は、前記挿通部に挿通する突起部と、前記接続部材及び前記支持体のいずれか他方に当接する当接面とを備えることを特徴とする。 The projector according to the aspect of the invention includes a plurality of reflection type light modulation devices that respectively modulate a plurality of color lights for each color light, and the plurality of color light beams that are arranged and inclined with respect to the plurality of reflection type light modulation devices. A plurality of reflective polarizing plates that respectively separate the polarized light, a color combining optical device that combines the respective color lights modulated by the plurality of reflective light modulating devices and separated by the plurality of reflective polarizing plates, A connecting member fixed to a color synthesizing optical device; a support that supports the reflective light modulation device and the reflective polarizing plate; and the connection member and the support that are interposed between the connecting member and the support. A fixing member for fixing the fixing member, wherein either one of the connection member and the support has an insertion portion through which a part of the fixing member is inserted, and the fixing member is a protrusion that is inserted into the insertion portion. And the connecting member Characterized in that it comprises the abutting abutment surface to the other of the fine said support.

本発明では、色合成光学装置に対する支持体の固定構造として、上述した接続部材及び固定部材を採用している。
このことにより、例えば、固定部材は、当接面に沿う方向への支持体の移動時には、挿通部に突起部が挿通した状態を維持しながら、支持体の移動を規制することなく、支持体を自由に移動させる。また、例えば、固定部材は、挿通部への突起部の挿通方向に沿う方向への支持体の移動時には、挿通部への突起部の挿通方向に沿って、支持体とともに移動する。
すなわち、固定部材を支持体の移動に追従させることができるため、接着剤にて固定する部位（挿通部と突起部との間、当接面と接続部材及び支持体のいずれか他方との間）の隙間を最小限に設定できる。このため、前記部位に充填する接着剤の量を少なくでき、接着剤の硬化時の収縮を小さくできる。
したがって、位置調整により反射型光変調装置を所望の位置に位置付けた後、前記部位の接着剤を硬化させて色合成光学装置に対して支持体を固定する場合であっても、反射型光変調装置を所望の位置に良好に維持できる。 In the present invention, the connection member and the fixing member described above are employed as the support fixing structure for the color synthesis optical device.
Thus, for example, when the support member moves in the direction along the contact surface, the fixing member can be supported without restricting the movement of the support member while maintaining the state where the protruding portion is inserted into the insertion portion. Move freely. Further, for example, when the support body moves in the direction along the insertion direction of the projection part to the insertion part, the fixing member moves together with the support body along the insertion direction of the projection part to the insertion part.
That is, since the fixing member can follow the movement of the support body, the part to be fixed by the adhesive (between the insertion part and the projection part, between the contact surface and the other one of the connection member and the support body). ) Can be set to a minimum. For this reason, the quantity of the adhesive agent with which the said site | part is filled can be decreased, and shrinkage | contraction at the time of hardening of an adhesive agent can be made small.
Therefore, even if the reflective light modulation device is positioned at a desired position by position adjustment, the reflective light modulation device is fixed even when the adhesive of the part is cured and the support is fixed to the color synthesis optical device. The device can be well maintained in the desired position.

本発明のプロジェクターでは、前記接続部材は、前記色合成光学装置における前記複数の色光がそれぞれ入射する複数の光入射面に交差する一対の交差端面の少なくともいずれか一方に固定され、光路上流側に延出し平面視で前記支持体に重なり合う張出部を有し、前記挿通部は、前記張出部に形成されていることが好ましい。
本発明では、挿通部が支持体ではなく接続部材に形成されているので、色合成光学装置に対する支持体の固定構造として上述した固定構造を採用する場合であっても、従来と同様の支持体を使用でき、支持体の設計変更を不要とする。
また、色合成光学装置及び支持体間に接続部材や固定部材が介在しないため、色合成光学装置に対して支持体を近接して配設でき、色合成光学装置に対して支持体が固定されたユニットを小型化できる。 In the projector according to the aspect of the invention, the connection member may be fixed to at least one of a pair of intersecting end surfaces intersecting a plurality of light incident surfaces on which the plurality of color lights in the color combining optical device respectively enter, and on the upstream side of the optical path It is preferable to have an overhanging portion that overlaps the support in an extended plan view, and the insertion portion is formed in the overhanging portion.
In the present invention, since the insertion portion is formed not on the support but on the connection member, even if the fixing structure described above is adopted as the fixing structure of the support for the color synthesizing optical device, the same support as in the prior art This eliminates the need to change the support design.
In addition, since no connection member or fixing member is interposed between the color synthesis optical device and the support, the support can be disposed close to the color synthesis optical device, and the support is fixed to the color synthesis optical device. The unit can be downsized.

本発明のプロジェクターでは、前記接続部材は、一対設けられ、前記一対の交差端面の双方にそれぞれ固定され、前記固定部材は、前記支持体を挟んで一対設けられていることが好ましい。
本発明では、色合成光学装置に対する支持体の固定構造（接続部材及び固定部材）は、支持体を挟んで一対設けられている。
このことにより、色合成光学装置に対する支持体の固定強度を十分に確保でき、外力が加わった場合であっても、色合成光学装置に対する支持体の位置ずれ、すなわち、反射型光変調装置の位置ずれを十分に抑制できる。 In the projector according to the aspect of the invention, it is preferable that a pair of the connection members are provided and fixed to both of the pair of intersecting end surfaces, and the fixing members are provided in a pair with the support interposed therebetween.
In the present invention, a pair of support fixing structures (connecting members and fixing members) with respect to the color synthesizing optical device are provided with a support interposed therebetween.
As a result, the fixing strength of the support relative to the color synthesis optical device can be sufficiently secured, and even when an external force is applied, the position of the support relative to the color synthesis optical device, that is, the position of the reflective light modulation device The shift can be sufficiently suppressed.

本発明のプロジェクターでは、前記挿通部及び前記突起部には、前記挿通部への前記突起部の挿通方向に沿う軸を中心とした前記突起部の回転を規制する回転規制部が形成されていることが好ましい。
本発明では、挿通部及び突起部に上述した回転規制部が設けられているので、位置調整時において、支持体の移動に固定部材を追従させても、固定部材が上述した軸を中心として回転することがない。
このため、当接面と支持体との接触面積を十分に維持した所望の位置から固定部材がずれることがなく、接着剤を硬化させる際に固定部材の位置を直す手間が省け、色合成光学装置に対する支持体の固定を容易に実施できる。 In the projector according to the aspect of the invention, the insertion portion and the protrusion portion may include a rotation restriction portion that restricts rotation of the protrusion portion about an axis along the insertion direction of the protrusion portion to the insertion portion. It is preferable.
In the present invention, since the rotation restricting portion described above is provided in the insertion portion and the protrusion portion, the fixing member rotates about the above-described axis even when the fixing member follows the movement of the support during position adjustment. There is nothing to do.
For this reason, the fixing member does not deviate from a desired position where the contact area between the contact surface and the support is sufficiently maintained, and it is possible to save the trouble of correcting the position of the fixing member when the adhesive is cured. The support can be easily fixed to the apparatus.

本発明のプロジェクターでは、前記固定部材は、前記突起部に直交して前記突起部の一端から光路上流側に延出し、前記当接面が形成された垂直壁を備え、前記張出部には、平面視で前記垂直壁に重なり合う位置に前記挿通部に連通する切欠部が形成されていることが好ましい。
ところで、例えば、固定部材として、突起部の一端から光路上流側及び光路下流側の双方に延出する一対の垂直壁を設けた構成、すなわち、側面視Ｔ字状の構成とする。このような構成とした場合には、光路下流側に位置する垂直壁が接続部材にて隠された位置に配設されるため、当該垂直壁と支持体との間に介在する接着剤を硬化することが難しい。
本発明では、固定部材が上述した構成、すなわち、側面視Ｌ字状の構成とされているので、支持体に固定するための垂直壁の数を最低限の数とし、固定部材を簡素な構造で小型化できる。
また、張出部に上述した切欠部が形成されているので、切欠部を介して垂直壁を支持体に向けて押圧することができる。すなわち、当該押圧により、垂直壁（当接面）を支持体に対して確実に密着させることができる。このため、当接面及び支持体を接着剤にて確実に固定して色合成光学装置に対する支持体の固定強度を十分に確保でき、外力が加わった場合であっても、色合成光学装置に対する支持体の位置ずれ、すなわち、反射型光変調装置の位置ずれを十分に抑制できる。 In the projector according to the aspect of the invention, the fixing member may include a vertical wall that is orthogonal to the protrusion and extends from one end of the protrusion to the upstream side of the optical path and on which the contact surface is formed. Preferably, a cutout portion communicating with the insertion portion is formed at a position overlapping the vertical wall in plan view.
By the way, for example, the fixing member has a configuration in which a pair of vertical walls extending from one end of the protruding portion to both the optical path upstream side and the optical path downstream side, that is, a T-shaped configuration in a side view. In such a configuration, the vertical wall located on the downstream side of the optical path is disposed at a position hidden by the connecting member, so that the adhesive interposed between the vertical wall and the support is cured. Difficult to do.
In the present invention, since the fixing member has the above-described configuration, that is, an L-shaped configuration in a side view, the number of vertical walls for fixing to the support is set to a minimum number, and the fixing member has a simple structure. Can be downsized.
Moreover, since the notch part mentioned above is formed in the overhang | projection part, a vertical wall can be pressed toward a support body through a notch part. That is, the vertical wall (contact surface) can be reliably adhered to the support by the pressing. For this reason, the abutment surface and the support can be securely fixed with an adhesive so that the fixing strength of the support with respect to the color synthesis optical device can be sufficiently secured, and even if an external force is applied, the color synthesis optical device can be secured. The positional deviation of the support, that is, the positional deviation of the reflective light modulator can be sufficiently suppressed.

本実施形態におけるプロジェクターの概略構成を示す図。FIG. 2 is a diagram illustrating a schematic configuration of a projector according to the present embodiment. 本実施形態における光学装置の構成を示す図。The figure which shows the structure of the optical apparatus in this embodiment. 本実施形態における光学装置の構成を示す図。The figure which shows the structure of the optical apparatus in this embodiment. 本実施形態における光学装置の構成を示す図。The figure which shows the structure of the optical apparatus in this embodiment. 本実施形態における投射ユニットの製造方法を説明するための図。The figure for demonstrating the manufacturing method of the projection unit in this embodiment.

以下、本発明の実施の一形態を図面に基づいて説明する。
〔プロジェクターの構成〕
図１は、プロジェクター１の概略構成を示す図である。具体的に、図１は、本願の要部である投射ユニット２の構成を示す斜視図である。
プロジェクター１は、画像を投射してスクリーン（図示略）上に投影画像を表示する。
このプロジェクター１は、図１に示すように、外装筐体（図示略）内部に収納される投射ユニット２を備える。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Configuration of projector]
FIG. 1 is a diagram illustrating a schematic configuration of the projector 1. Specifically, FIG. 1 is a perspective view showing a configuration of a projection unit 2 which is a main part of the present application.
The projector 1 projects an image and displays a projected image on a screen (not shown).
As shown in FIG. 1, the projector 1 includes a projection unit 2 housed in an exterior housing (not shown).

投射ユニット２は、光源装置（図示略）から出射され、ダイクロイックミラー等の色分離光学装置で分離されたＲ、Ｇ、Ｂの各色光をそれぞれ変調し、変調した各色光を合成して投射するものである。
この投射ユニット２は、図１に示すように、光学装置２Ａと、投射レンズ２Ｂと、光学装置２Ａ及び投射レンズ２Ｂを支持する基体２Ｃとを備える。 The projection unit 2 modulates R, G, and B color lights emitted from a light source device (not shown) and separated by a color separation optical device such as a dichroic mirror, and synthesizes and projects the modulated color lights. Is.
As shown in FIG. 1, the projection unit 2 includes an optical device 2A, a projection lens 2B, and a base 2C that supports the optical device 2A and the projection lens 2B.

〔光学装置の構成〕
図２ないし図４は、光学装置２Ａの構成を示す図である。具体的に、図２は、光学装置２Ａの構成を示す分解斜視図である。図３（Ａ）は、図１中、左側から光学装置２Ａを見た平面図である。図３（Ｂ）は、図３（Ａ）におけるＢ−Ｂ線の断面図である。図４は、光学装置２Ａの光学系を図１中、左側から見た模式図である。
光学装置２Ａは、図１ないし図３に示すように、反射型偏光板としての３つのワイヤーグリッド３と、３つの反射型光変調装置４と、３つの偏光板５（図２〜図３）と、３つの支持体６（図１〜図３）と、色合成光学装置としてのクロスダイクロイックプリズム７と、接続部材８と（図１〜図３）、固定部材９（図１〜図３）とを備える。
なお、以下では、説明の便宜上、Ｒ色光側のワイヤーグリッドを３Ｒ、Ｇ色光側のワイヤーグリッドを３Ｇ、Ｂ色光側のワイヤーグリッドを３Ｂとしている。 [Configuration of optical device]
2 to 4 are diagrams showing the configuration of the optical device 2A. Specifically, FIG. 2 is an exploded perspective view showing the configuration of the optical device 2A. FIG. 3A is a plan view of the optical device 2A viewed from the left side in FIG. FIG. 3B is a cross-sectional view taken along line BB in FIG. 4 is a schematic view of the optical system of the optical device 2A as viewed from the left side in FIG.
As shown in FIGS. 1 to 3, the optical device 2A includes three wire grids 3 as reflective polarizing plates, three reflective light modulation devices 4, and three polarizing plates 5 (FIGS. 2 to 3). And three supports 6 (FIGS. 1 to 3), a cross dichroic prism 7 as a color synthesizing optical device, a connecting member 8 (FIGS. 1 to 3), and a fixing member 9 (FIGS. 1 to 3). With.
In the following, for convenience of explanation, the wire grid on the R color light side is 3R, the wire grid on the G color light side is 3G, and the wire grid on the B color light side is 3B.

〔ワイヤーグリッドの構成〕
３つのワイヤーグリッド３は、格子構造に基づく回折により入射した光束を偏光分離する。各ワイヤーグリッド３は、図１ないし図４に示すように、支持体６により、入射光束の光軸に対して略４５°傾斜した状態で配置される。
そして、各ワイヤーグリッド３は、入射した光束のうち、所定の偏光光（第１の直線偏光光）を透過させ、第１の直線偏光光の偏光方向に直交する偏光方向を有する偏光光（第２の直線偏光光）を反射させ、入射した光束を偏光分離する。 [Configuration of wire grid]
The three wire grids 3 separate and split the incident light beam by diffraction based on the lattice structure. As shown in FIGS. 1 to 4, each wire grid 3 is arranged in a state inclined by approximately 45 ° with respect to the optical axis of the incident light beam by the support 6.
Each wire grid 3 transmits predetermined polarized light (first linearly polarized light) out of the incident light flux, and has polarized light (first polarization) orthogonal to the polarization direction of the first linearly polarized light. 2 linearly polarized light) is reflected, and the incident light beam is polarized and separated.

〔反射型光変調装置の構成〕
３つの反射型光変調装置４は、シリコン基板上に液晶が形成された所謂ＬＣＯＳで構成された反射型液晶パネルを備える。各反射型光変調装置４は、図１ないし図４に示すように、支持体６により、各ワイヤーグリッド３を透過した光束の光軸に対して略直交した状態でそれぞれ配置される。
そして、各反射型光変調装置４は、制御装置（図示略）からの信号を入力されることで、前記液晶の配向状態が制御され、ワイヤーグリッド３を透過した偏光光束の偏光方向を変調し、ワイヤーグリッド３に向けて反射する。反射型光変調装置４にて変調され、ワイヤーグリッド３に向けて反射された光束は、第２の直線偏光光と同一の偏光方向を有する偏光光のみがワイヤーグリッド３にて反射されてプリズム７に向う。 [Configuration of reflection type light modulation device]
The three reflection type light modulation devices 4 include a reflection type liquid crystal panel made of so-called LCOS in which a liquid crystal is formed on a silicon substrate. As shown in FIGS. 1 to 4, each of the reflection type light modulation devices 4 is arranged by the support 6 in a state substantially orthogonal to the optical axis of the light beam transmitted through each wire grid 3.
Each of the reflection type light modulation devices 4 receives a signal from a control device (not shown), thereby controlling the alignment state of the liquid crystal and modulating the polarization direction of the polarized light beam transmitted through the wire grid 3. Reflected toward the wire grid 3. Of the light beam modulated by the reflection type light modulation device 4 and reflected toward the wire grid 3, only the polarized light having the same polarization direction as the second linearly polarized light is reflected by the wire grid 3, and the prism 7. Towards.

〔偏光板の構成〕
３つの偏光板５は、各反射型光変調装置４にて変調されワイヤーグリッド３にて反射された第２の直線偏光光の偏光方向と略同一の偏光方向を有する偏光光を透過させる。すなわち、ワイヤーグリッド３及び偏光板５の双方を用いることで、ワイヤーグリッド３にて所望の直線偏光光以外の偏光成分が反射された場合であっても、偏光板５にて前記偏光成分を除去する構成を採用している。
そして、各偏光板５は、図２ないし図３に示すように、支持体６により、プリズム７の各光入射面７１にそれぞれ対向するように配置される。 [Configuration of polarizing plate]
The three polarizing plates 5 transmit polarized light having a polarization direction substantially the same as the polarization direction of the second linearly polarized light modulated by each reflective light modulation device 4 and reflected by the wire grid 3. That is, by using both the wire grid 3 and the polarizing plate 5, the polarizing component is removed by the polarizing plate 5 even when a polarized light component other than the desired linearly polarized light is reflected by the wire grid 3. The structure to be adopted is adopted.
As shown in FIGS. 2 to 3, each polarizing plate 5 is disposed by the support 6 so as to face each light incident surface 71 of the prism 7.

〔クロスダイクロイックプリズムの構成〕
プリズム７は、図２ないし図３に示すように、各偏光板５を透過した各色光がそれぞれ入射される３つの光入射面７１を有し、入射した各色光を合成する。
このプリズム７は、４つの直角プリズムを貼り合せた平面視略正方形状をなし、直角プリズム同士を貼り合せた界面には、２つの誘電体多層膜が形成されている。これら誘電体多層膜は、ワイヤーグリッド３Ｇにて反射されたＧ色光を透過し、各ワイヤーグリッド３Ｒ，３Ｂにて反射されたＲ，Ｂ色光をそれぞれ反射する。このようにして、各色光が合成される。そして、プリズム７で合成された光束（画像）は、投射レンズ２Ｂにてスクリーンに向けて投射される。 [Configuration of cross dichroic prism]
As shown in FIGS. 2 to 3, the prism 7 has three light incident surfaces 71 on which the respective color lights transmitted through the respective polarizing plates 5 are incident, and synthesizes the incident color lights.
This prism 7 has a substantially square shape in plan view in which four right-angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right-angle prisms are bonded together. These dielectric multilayer films transmit the G color light reflected by the wire grid 3G, and reflect the R and B color lights reflected by the wire grids 3R and 3B, respectively. In this way, each color light is synthesized. The luminous flux (image) synthesized by the prism 7 is projected toward the screen by the projection lens 2B.

〔支持体の構成〕
３つの支持体６は、Ｒ，Ｇ，Ｂの色光毎に配設されるワイヤーグリッド３、反射型光変調装置４、及び偏光板５をそれぞれ支持する。
この支持体６は、図２または図３に示すように、断面略直角二等辺三角形状を有する三角柱状の中空部材であり、斜面である第１側面６１、頂角を挟む第２側面６２及び第３側面６３を備える。そして、各側面６１〜６３には、開口部６４（図３（Ｂ））がそれぞれ形成されている。 (Structure of support)
The three supports 6 support the wire grid 3, the reflective light modulation device 4, and the polarizing plate 5 that are arranged for each of R, G, and B color lights.
As shown in FIG. 2 or 3, the support 6 is a triangular prism-shaped hollow member having a substantially right-angled isosceles cross section, and includes a first side surface 61 that is a slope, a second side surface 62 that sandwiches the apex angle, and A third side surface 63 is provided. And each side 61-63 is each formed with the opening part 64 (FIG.3 (B)).

第１側面６１には、ワイヤーグリッド３が固定される。
また、第２側面６２には、反射型光変調装置４が固定される。
さらに、第３側面６３には、偏光板５が固定される。
以上のように、各側面６１〜６３に各部材３〜５がそれぞれ固定されることで、各開口部６４が閉塞され、支持体６内部の空間が密閉される。すなわち、この密閉空間内に反射型光変調装置４の反射面が配置されることとなるので、反射面への粉塵の付着を防ぐことができ、反射面に付着した粉塵が投影画像中に影として映る等の投影画像の劣化を防止できる。
また、支持体６において、各側面６１〜６３に交差する一対の底面６５は、図２または図３に示すように、平坦状に形成されている。 The wire grid 3 is fixed to the first side surface 61.
Further, the reflection type light modulation device 4 is fixed to the second side face 62.
Further, the polarizing plate 5 is fixed to the third side surface 63.
As described above, by fixing the members 3 to 5 to the side surfaces 61 to 63, the openings 64 are closed, and the space inside the support 6 is sealed. That is, since the reflective surface of the reflective light modulation device 4 is disposed in this sealed space, it is possible to prevent dust from adhering to the reflective surface, and dust adhering to the reflective surface is not reflected in the projected image. It is possible to prevent deterioration of the projected image such as
Moreover, in the support body 6, a pair of bottom face 65 which cross | intersects each side surfaces 61-63 is formed in flat shape, as shown in FIG.

〔接続部材の構成〕
接続部材８は、図２または図３に示すように、一対設けられ、プリズム７における各光入射面７１に交差する一対の交差端面７２にそれぞれ固定される。
なお、以下では、説明の便宜上、図２中、左側に位置する接続部材を第１接続部材８Ａとし、右側に位置する接続部材を第２接続部材８Ｂとする。
また、第２接続部材８Ｂは、第１接続部材８Ａにおける後述する基部８１と同様の構成を有しているため、同一の符号を付してその詳細な説明については省略する。 [Configuration of connecting members]
As shown in FIG. 2 or FIG. 3, a pair of connection members 8 are provided and fixed to a pair of intersecting end surfaces 72 that intersect each light incident surface 71 of the prism 7.
In the following, for convenience of explanation, in FIG. 2, the connecting member located on the left side is referred to as a first connecting member 8A, and the connecting member located on the right side is referred to as a second connecting member 8B.
Moreover, since the 2nd connection member 8B has the structure similar to the base 81 mentioned later in the 1st connection member 8A, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

第１接続部材８Ａは、図１ないし図３に示すように、基部８１及び接続部８２が一体形成されたものである。
基部８１は、交差端面７２の平面形状と略同一の平面形状を有する矩形状の板体で構成されている。
この基部８１において、各光入射面７１に倣う各端面には、図２または図３に示すように、光路上流側（各光入射面７１の法線方向）に延出し、平面視で支持体６の底面６５に重なる張出部８１１がそれぞれ形成されている。 As shown in FIGS. 1 to 3, the first connecting member 8 </ b> A is formed by integrally forming a base portion 81 and a connecting portion 82.
The base 81 is configured by a rectangular plate having a planar shape substantially the same as the planar shape of the intersecting end surface 72.
As shown in FIG. 2 or FIG. 3, in the base 81, each end face that follows each light incident surface 71 extends to the upstream side of the optical path (normal direction of each light incident surface 71), and is supported in a plan view. Overhang portions 811 are formed to overlap the bottom surface 65 of 6.

張出部８１１には、図２または図３に示すように、表裏を貫通する挿通部８１１Ａが形成されている。
この挿通部８１１Ａは、図３（Ａ）に示すように、平面視で、光入射面７１に直交する方向に延び、略矩形形状を有する。
また、張出部８１１の先端部分には、挿通部８１１Ａに連通するように切欠部８１１Ｂが形成されている。
接続部８２は、図１に示すように、基部８１の板面から面外方向に突出し、光学装置２Ａを基体２Ｃに対して固定する部分である。 As shown in FIG. 2 or FIG. 3, the overhanging portion 811 is formed with an insertion portion 811A penetrating the front and back.
As shown in FIG. 3A, the insertion portion 811A extends in a direction orthogonal to the light incident surface 71 in a plan view and has a substantially rectangular shape.
In addition, a notch portion 811B is formed at the distal end portion of the overhang portion 811 so as to communicate with the insertion portion 811A.
As shown in FIG. 1, the connecting portion 82 projects from the plate surface of the base portion 81 in the out-of-plane direction, and fixes the optical device 2A to the base 2C.

〔固定部材の構成〕
固定部材９は、接続部材８とともに、プリズム７に対して支持体６を固定する部材である。この固定部材９は、図２または図３に示すように、１つの支持体６を一対で挟むように配設され、３つの支持体６に対して計６つ設けられている。
この固定部材９は、突起部９１と、垂直壁９２とを備え、側面視略Ｌ字形状を有する。
突起部９１は、挿通部８１１Ａに挿通する部分であり、平面視で挿通部８１１Ａの内周形状よりも若干小さい略矩形形状を有する。 [Configuration of fixing member]
The fixing member 9 is a member that fixes the support body 6 to the prism 7 together with the connection member 8. As shown in FIG. 2 or FIG. 3, the fixing members 9 are disposed so as to sandwich one support 6 in a pair, and a total of six fixing members 9 are provided for the three supports 6.
The fixing member 9 includes a protruding portion 91 and a vertical wall 92, and has a substantially L shape in side view.
The protrusion 91 is a portion that is inserted through the insertion portion 811A, and has a substantially rectangular shape that is slightly smaller than the inner peripheral shape of the insertion portion 811A in plan view.

垂直壁９２は、突起部９１の一端から光路上流側に向けて延出し、図３に示すように、平面視で支持体６の底面６５に重なるように形成されている。
この垂直壁９２において、支持体６の底面６５に対向する端面は、図３（Ｂ）に示すように、平坦状に形成され、支持体６の底面６５に当接する当接面９２１として機能する。
また、垂直壁９２には、図２または図３に示すように、表裏を貫通する一対の硬化用孔９２２が形成されている。
一対の硬化用孔９２２は、図３（Ａ）に示すように、一部が平面視で張出部８１１よりも光路上流側に位置するように形成されている。 The vertical wall 92 extends from one end of the protrusion 91 toward the upstream side of the optical path, and is formed so as to overlap the bottom surface 65 of the support 6 in plan view, as shown in FIG.
In the vertical wall 92, the end surface facing the bottom surface 65 of the support 6 is formed flat as shown in FIG. 3B and functions as a contact surface 921 that contacts the bottom surface 65 of the support 6. .
Further, as shown in FIG. 2 or FIG. 3, the vertical wall 92 is formed with a pair of curing holes 922 penetrating the front and back.
As shown in FIG. 3A, the pair of curing holes 922 are formed so that a part thereof is positioned on the upstream side of the optical path from the overhanging portion 811 in a plan view.

〔投射ユニットの製造方法〕
次に、上述した投射ユニット２の製造方法について説明する。
図５は、投射ユニット２の製造方法を説明するための図である。具体的に、図５は、図３（Ｂ）と同方向から見た断面の一部を示す図である。
先ず、作業者は、プリズム７に対して接続部材８を固定するとともに、第１接続部材８を基体２Ｃに対して固定し、投射レンズ２Ｂとプリズム７とを一体化する。また、作業者は、支持体６に対して各部材３〜５を固定する。
次に、作業者は、突起部９１の外周面、及び当接面９２１に紫外線硬化型の接着剤を塗布する。そして、作業者は、図５（Ａ）に示すように、一対の固定部材９を、互いに対向する張出部８１１間に位置するように、突起部９１を挿通部８１１Ａに挿通し、張出部８１１に垂直壁９２を当接させる。 [Production method of projection unit]
Next, a method for manufacturing the projection unit 2 described above will be described.
FIG. 5 is a diagram for explaining a method of manufacturing the projection unit 2. Specifically, FIG. 5 is a diagram illustrating a part of a cross section viewed from the same direction as FIG.
First, the operator fixes the connection member 8 to the prism 7 and also fixes the first connection member 8 to the base 2C to integrate the projection lens 2B and the prism 7 together. Further, the operator fixes the members 3 to 5 to the support 6.
Next, the worker applies an ultraviolet curable adhesive to the outer peripheral surface of the protrusion 91 and the contact surface 921. Then, as shown in FIG. 5A, the operator inserts the protruding portion 91 into the insertion portion 811A so that the pair of fixing members 9 are positioned between the protruding portions 811 facing each other, and extends. The vertical wall 92 is brought into contact with the portion 811.

次に、作業者は、治具（図示略）を利用し、当該治具に支持体６を保持させながら、図５（Ｂ）に示すように、偏光板５が光入射面７１に対向し、各底面６５が各張出部８１１に対向する姿勢で、支持体６を一対の固定部材９間に位置付ける。
次に、作業者は、図５（Ｃ）に示すように、一対の固定部材９を互いに近接する方向に移動させ、垂直壁９２を支持体６の底面６５に当接させる。
そして、作業者は、３つの支持体６を上述した状態に設定した後、各反射型光変調装置４の位置調整（フォーカス調整及びアライメント調整）を開始する。
なお、以下では、説明の便宜上、光入射面７１の法線方向をＺ軸とし、挿通部８１１Ａへの突起部９１の挿通方向をＸ軸とし、Ｘ軸及びＺ軸に直交する軸をＹ軸とする（図５（Ｃ）参照）。 Next, the operator uses a jig (not shown) and holds the support 6 on the jig, and the polarizing plate 5 faces the light incident surface 71 as shown in FIG. The support 6 is positioned between the pair of fixing members 9 with each bottom surface 65 facing each overhanging portion 811.
Next, as shown in FIG. 5C, the operator moves the pair of fixing members 9 in directions close to each other, and brings the vertical wall 92 into contact with the bottom surface 65 of the support 6.
And after setting the three support bodies 6 in the state mentioned above, an operator starts position adjustment (focus adjustment and alignment adjustment) of each reflection type light modulation device 4.
In the following, for convenience of explanation, the normal direction of the light incident surface 71 is the Z axis, the insertion direction of the projection 91 to the insertion portion 811A is the X axis, and the axes orthogonal to the X axis and the Z axis are the Y axis. (See FIG. 5C).

先ず、作業者は、以下に示すように、フォーカス調整を実施する。
すなわち、作業者は、治具を操作し、治具からワイヤーグリッド３に向けてフォーカス調整用の光束を出射させる。
そして、作業者は、反射型光変調装置４にて変調され、ワイヤーグリッド３、偏光板５、プリズム７、及び投射レンズ２Ｂを介してスクリーンに投射された投影画像を確認しながら、投影画像が合焦状態となるように、治具を操作して支持体６を移動させる。
具体的に、作業者は、治具を操作して、Ｚ軸に沿う方向、Ｘ軸を中心とした回転方向（以下、Ｘθ方向）、及びＹ軸を中心とした回転方向（以下、Ｙθ方向）に支持体６を移動させる。
ここで、支持体６をＺ軸に沿う方向に移動させた場合には、当接面９２１に対して支持体６の底面６５が摺動するのみであり、固定部材９は、支持体６の移動に連動することはない。
一方、支持体６をＸθ方向あるいはＹθ方向に移動させた場合には、固定部材９は、紫外線硬化型の接着剤の表面張力によって当接面９２１及び底面６５の密着状態が維持されるため、挿通部８１１Ａの内周面と突起部９１の外周面とのクリアランスに応じて挿通部８１１Ａ内部で突起部９１が傾斜するように移動する。 First, the worker performs focus adjustment as described below.
That is, the operator operates the jig and emits a light beam for focus adjustment from the jig toward the wire grid 3.
Then, the operator confirms the projected image that is modulated by the reflective light modulation device 4 and projected onto the screen via the wire grid 3, the polarizing plate 5, the prism 7, and the projection lens 2B. The support 6 is moved by operating the jig so as to be in focus.
Specifically, the operator operates the jig, rotates along the Z axis, rotates around the X axis (hereinafter referred to as Xθ direction), and rotates around the Y axis (hereinafter referred to as Yθ direction). ) To move the support 6.
Here, when the support 6 is moved in the direction along the Z axis, the bottom surface 65 of the support 6 only slides with respect to the contact surface 921, and the fixing member 9 It is not linked to movement.
On the other hand, when the support 6 is moved in the Xθ direction or the Yθ direction, the fixing member 9 maintains the contact state between the contact surface 921 and the bottom surface 65 by the surface tension of the ultraviolet curable adhesive. According to the clearance between the inner peripheral surface of the insertion portion 811A and the outer peripheral surface of the projection portion 91, the projection portion 91 moves so as to incline inside the insertion portion 811A.

そして、作業者は、３つの反射型光変調装置４のフォーカス調整を実施した後、以下に示すように、アライメント調整を実施する。
すなわち、作業者は、治具を操作し、治具から各ワイヤーグリッド３に向けてアライメント調整用の光束（Ｒ，Ｇ，Ｂの各色光）をそれぞれ出射させる。
そして、作業者は、各反射型光変調装置４にて変調され、各ワイヤーグリッド３、各偏光板５、プリズム７、及び投射レンズ２Ｂを介してスクリーンに投射されたＲ，Ｇ，Ｂの各投影画像を確認しながら、各投影画像の画素が一致するように、治具を操作して各支持体６を移動させる。 Then, after performing the focus adjustment of the three reflective light modulation devices 4, the operator performs the alignment adjustment as described below.
That is, the operator operates the jig to emit light beams for alignment adjustment (color lights of R, G, and B) from the jig toward the wire grids 3.
The operator modulates each of the reflection type light modulators 4 and projects each of R, G, and B projected on the screen via each wire grid 3, each polarizing plate 5, each prism 7, and the projection lens 2B. While confirming the projected image, the support 6 is moved by operating the jig so that the pixels of the projected images match.

具体的に、作業者は、治具を操作して、Ｘ軸に沿う方向、Ｙ軸に沿う方向、及びＺ軸を中心とした回転方向（以下、Ｚθ方向）に各支持体６を移動させる。
ここで、支持体６をＹ軸に沿う方向に移動させた場合には、固定部材９は、上述したＺ軸に沿う方向に移動させた場合と同様に、支持体６の移動に連動することはない。
また、支持体６をＸ軸に沿う方向に移動させた場合には、固定部材９は、紫外線硬化型の接着剤の表面張力によって当接面９２１及び底面６５が密着しているため、挿通部８１１Ａに突起部９１が挿通された状態を維持しながら、支持体６とともにＸ軸方向に移動する。
さらに、支持体６をＺθ方向に移動させた場合には、固定部材９は、上述したＸθ方向あるいはＹθ方向に移動させた場合と同様に、挿通部８１１Ａ内部で突起部９１が傾斜するように移動する。 Specifically, the operator operates the jig to move each support body 6 in the direction along the X axis, the direction along the Y axis, and the rotation direction around the Z axis (hereinafter, Zθ direction). .
Here, when the support body 6 is moved in the direction along the Y-axis, the fixing member 9 is interlocked with the movement of the support body 6 as in the case where the support member 6 is moved in the direction along the Z-axis described above. There is no.
Further, when the support 6 is moved in the direction along the X axis, the fixing member 9 is in contact with the contact surface 921 and the bottom surface 65 by the surface tension of the ultraviolet curable adhesive. It moves in the X-axis direction together with the support body 6 while maintaining the state where the protrusion 91 is inserted through 811A.
Further, when the support body 6 is moved in the Zθ direction, the fixing member 9 is arranged so that the protrusion 91 is inclined inside the insertion portion 811A, as in the case where the fixing member 9 is moved in the Xθ direction or the Yθ direction. Moving.

次に、作業者は、上述した位置調整を実施した後、各切欠部８１１Ｂを介して各固定部材９の垂直壁９２を支持体６に向けて押圧し、各当接面９２１を支持体６の底面６５に対して確実に密着させる。
そして、作業者は、挿通部８１１Ａの内周面と突起部９１の外周面との間の接着剤、及び当接面９２１と支持体６の底面６５との間の接着剤に紫外線を照射して硬化させる。
なお、当接面９２１と支持体６の底面６５との間の接着剤を硬化させる際には、一対の硬化用孔９２２に向けて紫外線を照射するものである。
以上のように、接着剤を硬化させることで、プリズム７に対して各支持体６が固定され、投射ユニット２が製造される。 Next, after performing the above-described position adjustment, the operator presses the vertical wall 92 of each fixing member 9 toward the support body 6 through each notch portion 811B, and each contact surface 921 is pressed to the support body 6. The bottom surface 65 is securely adhered.
The operator then irradiates the adhesive between the inner peripheral surface of the insertion portion 811A and the outer peripheral surface of the protrusion 91 and the adhesive between the contact surface 921 and the bottom surface 65 of the support 6 with ultraviolet rays. To cure.
When the adhesive between the contact surface 921 and the bottom surface 65 of the support 6 is cured, ultraviolet rays are irradiated toward the pair of curing holes 922.
As described above, by curing the adhesive, each support 6 is fixed to the prism 7 and the projection unit 2 is manufactured.

上述した本実施形態によれば、以下の効果がある。
本実施形態では、プリズム７に対する支持体６の固定構造として、接続部材８及び固定部材９を採用している。
このことにより、固定部材９を支持体６の移動に追従させることができるため、接着剤にて固定する部位（挿通部８１１Ａの内周面と突起部９１の外周面との間、当接面９２１と支持体６の底面６５との間）の隙間を最小限に設定できる。このため、前記部位に充填する接着剤の量を少なくでき、接着剤の硬化時の収縮を小さくできる。
したがって、位置調整により反射型光変調装置４を所望の位置に位置付けた後、前記部位の接着剤を硬化させてプリズム７に対して支持体６を固定する場合であっても、反射型光変調装置４を所望の位置に良好に維持できる。 According to this embodiment described above, the following effects are obtained.
In the present embodiment, a connection member 8 and a fixing member 9 are employed as a structure for fixing the support 6 to the prism 7.
As a result, the fixing member 9 can follow the movement of the support 6, so that the portion to be fixed with an adhesive (the contact surface between the inner peripheral surface of the insertion portion 811 </ b> A and the outer peripheral surface of the protruding portion 91 is fixed. 921 and the bottom surface 65 of the support 6 can be set to a minimum. For this reason, the quantity of the adhesive agent with which the said site | part is filled can be decreased, and shrinkage | contraction at the time of hardening of an adhesive agent can be made small.
Therefore, even when the reflective light modulation device 4 is positioned at a desired position by position adjustment, the adhesive of the part is cured and the support 6 is fixed to the prism 7 even when the reflective light modulation device 4 is fixed. The apparatus 4 can be maintained in a desired position.

また、固定部材９を支持体６の移動に追従させることができるため、固定部材９を組み込んだ状態で反射型光変調装置４を位置調整でき、例えば、反射型光変調装置４の位置調整後に固定部材９を組み込む構成と比較して、投射ユニット２の製造を容易に実施できる。 In addition, since the fixing member 9 can follow the movement of the support 6, the position of the reflective light modulation device 4 can be adjusted with the fixing member 9 incorporated, for example, after the position of the reflective light modulation device 4 is adjusted. Compared to the configuration in which the fixing member 9 is incorporated, the projection unit 2 can be easily manufactured.

さらに、挿通部８１１Ａが支持体６ではなく接続部材８に形成されているので、プリズム７に対する支持体６の固定構造として上述した固定構造を採用する場合であっても、従来と同様の支持体６を使用でき、支持体６の設計変更を不要とする。
また、プリズム７及び支持体６間に接続部材８や固定部材９が介在しないため、プリズム７に対して支持体６を近接して配設でき、光学装置２Ａを小型化できる。 Further, since the insertion portion 811A is formed not on the support 6 but on the connection member 8, even if the above-described fixing structure is adopted as the fixing structure of the support 6 with respect to the prism 7, the same support as in the prior art. 6 can be used, and the design change of the support 6 is not required.
Further, since the connecting member 8 and the fixing member 9 are not interposed between the prism 7 and the support body 6, the support body 6 can be disposed close to the prism 7, and the optical device 2A can be downsized.

さらに、プリズム７に対する支持体６の固定構造（接続部材８及び固定部材９）は、支持体６を挟んで一対設けられている。
このことにより、プリズム７に対する支持体６の固定強度を十分に確保でき、外力が加わった場合であっても、プリズム７に対する支持体６の位置ずれ、すなわち、反射型光変調装置４の位置ずれを十分に抑制できる。 Further, a pair of fixing structures (connecting member 8 and fixing member 9) for the support 6 with respect to the prism 7 are provided with the support 6 interposed therebetween.
Thus, the fixing strength of the support 6 with respect to the prism 7 can be sufficiently secured, and even when an external force is applied, the positional deviation of the support 6 with respect to the prism 7, that is, the positional deviation of the reflective light modulation device 4. Can be sufficiently suppressed.

また、挿通部８１１Ａの内周面、及び突起部９１の外周面は、平面視略矩形形状を有している。このため、反射型光変調装置４の位置調整時において、支持体６の移動に固定部材９を追従させても、固定部材９がＸ軸を中心として回転することがない。すなわち、挿通部８１１Ａの内周面、及び突起部９１の外周面が本発明に係る回転規制部１０（図３（Ａ））に相当する。
このため、当接面９２１と支持体６の底面６５との接触面積を十分に維持した所望の位置から固定部材９がずれることがなく、接着剤を硬化させる際に固定部材９の位置を直す手間が省け、プリズム７に対する支持体６の固定を容易に実施できる。 Further, the inner peripheral surface of the insertion portion 811A and the outer peripheral surface of the protrusion 91 have a substantially rectangular shape in plan view. For this reason, at the time of adjusting the position of the reflection type light modulation device 4, the fixing member 9 does not rotate around the X axis even if the fixing member 9 follows the movement of the support 6. That is, the inner peripheral surface of the insertion portion 811A and the outer peripheral surface of the protrusion 91 correspond to the rotation restricting portion 10 (FIG. 3A) according to the present invention.
For this reason, the fixing member 9 does not deviate from a desired position where the contact area between the contact surface 921 and the bottom surface 65 of the support 6 is sufficiently maintained, and the position of the fixing member 9 is corrected when the adhesive is cured. This saves time and allows the support 6 to be fixed to the prism 7 easily.

さらに、固定部材９が側面視Ｌ字状の構成とされているので、例えば固定部材９が側面視Ｔ字状に構成されている場合と比較して、支持体６に固定するための垂直壁９２の数を最低限の数とし、固定部材９を簡素な構造で小型化できる。
また、張出部８１１に切欠部８１１Ｂが形成されているので、切欠部８１１Ｂを介して垂直壁９２を支持体６に向けて押圧することができる。すなわち、当該押圧により、垂直壁９２（当接面９２１）を支持体６の底面６５に対して確実に密着させることができる。このため、当接面９２１及び支持体６の底面６５を接着剤にて確実に固定してプリズム７に対する支持体６の固定強度を十分に確保でき、外力が加わった場合であっても、プリズム７に対する支持体６の位置ずれ、すなわち、反射型光変調装置４の位置ずれを十分に抑制できる。 Furthermore, since the fixing member 9 has an L-shaped configuration when viewed from the side, for example, a vertical wall for fixing to the support 6 as compared with a case where the fixing member 9 is configured as a T-shape when viewed from the side. The number 92 is set to the minimum number, and the fixing member 9 can be downsized with a simple structure.
In addition, since the notched portion 811B is formed in the overhanging portion 811, the vertical wall 92 can be pressed toward the support body 6 through the notched portion 811B. That is, the vertical wall 92 (contact surface 921) can be reliably brought into close contact with the bottom surface 65 of the support 6 by the pressing. Therefore, the abutment surface 921 and the bottom surface 65 of the support 6 can be securely fixed with an adhesive to sufficiently secure the fixing strength of the support 6 with respect to the prism 7, and even when an external force is applied, the prism 7, that is, the positional deviation of the reflective light modulation device 4 can be sufficiently suppressed.

なお、本発明は前述の実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
前記実施形態では、接続部材８に挿通部８１１Ａが形成されていたが、これに限らず、支持体６に挿通部を形成した構成を採用しても構わない。すなわち、接続部材８及び支持体６のいずれか一方に、挿通部が形成されていればよい。
前記実施形態では、固定部材９は、側面視Ｌ字形状を有していたが、これに限らず、突起部と当接面とを有していれば、いずれの形状を採用してもよく、例えば、ピン形状としてもよく、あるいは、側面視Ｔ字形状としても構わない。
前記実施形態では、プリズム７の交差端面７２に接続部材８が固定されていたが、これに限らず、プリズム７の光入射面７１に接続部材８を固定した構造を採用しても構わない。すなわち、プリズム７と支持体６との間に固定構造を設けても構わない。 It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the embodiment, the insertion portion 811 </ b> A is formed in the connection member 8. However, the configuration is not limited thereto, and a configuration in which the insertion portion is formed in the support 6 may be adopted. In other words, it is only necessary that the insertion portion is formed in either one of the connection member 8 and the support body 6.
In the embodiment, the fixing member 9 has an L-shape when viewed from the side. However, the fixing member 9 is not limited thereto, and any shape may be adopted as long as it has a protrusion and a contact surface. For example, a pin shape may be used, or a T shape when viewed from the side may be used.
In the above embodiment, the connecting member 8 is fixed to the intersecting end surface 72 of the prism 7. However, the present invention is not limited to this, and a structure in which the connecting member 8 is fixed to the light incident surface 71 of the prism 7 may be adopted. That is, a fixing structure may be provided between the prism 7 and the support 6.

前記実施形態では、挿通部８１１Ａの内周面、及び突起部９１の外周面を本発明に係る回転規制部１０として構成していたが、これに限らず、Ｘ軸を中心とした固定部材９の回転を規制できる構造であれば、いずれの構造を採用しても構わない。 In the above-described embodiment, the inner peripheral surface of the insertion portion 811A and the outer peripheral surface of the protrusion 91 are configured as the rotation restricting portion 10 according to the present invention. Any structure may be employed as long as the rotation can be restricted.

前記実施形態において、投射ユニット２の製造方法は、前記実施形態で説明した製造方法に限らない。
例えば、前記実施形態では、固定部材９を組み込んだ状態で反射型光変調装置４の位置調整を実施していたが、これに限らず、反射型光変調装置４の位置調整後に、固定部材９を組み込む方法を採用しても構わない。
また、前記実施形態では、スクリーン上の投影画像を確認しながら反射型光変調装置４の位置調整を実施していたが、これに限らず、プリズム７から出射される位置調整用の光束をＣＣＤカメラ等で直接、検出しながら位置調整を実施する方法を採用しても構わない。すなわち、光学装置２Ａを製造した後に、基体２Ｃを介して光学装置２Ａと投射レンズ２Ｂとを一体化する方法を採用しても構わない。 In the said embodiment, the manufacturing method of the projection unit 2 is not restricted to the manufacturing method demonstrated in the said embodiment.
For example, in the above-described embodiment, the position adjustment of the reflective light modulation device 4 is performed in a state where the fixing member 9 is incorporated. However, the present invention is not limited to this, and after the position adjustment of the reflective light modulation device 4 is performed, the fixing member 9 is adjusted. You may adopt the method of incorporating.
In the above-described embodiment, the position adjustment of the reflection type light modulation device 4 is performed while checking the projected image on the screen. However, the present invention is not limited to this. You may employ | adopt the method of implementing position adjustment, detecting directly with a camera etc. FIG. That is, after manufacturing the optical device 2A, a method of integrating the optical device 2A and the projection lens 2B via the base 2C may be adopted.

前記実施形態では、反射型偏光板としてワイヤーグリッド３が用いられていたが、反射型偏光板であればその他の構成を採用しても構わない。
例えば、反射型偏光板として、誘電体多層膜によって形成される偏光分離素子、液晶材料等の屈折率異方性（複屈折性）を有する有機材料を層状に積層させた高分子系の層状偏光板、偏りのない光を右回りの円偏光と左回りの円偏光とに分離する円偏光反射板と１／４波長板を組み合わせた光学素子、ブリュースター角を利用して反射偏光光と透過偏光光とに分離する光学素子、あるいは、ホログラムを利用したホログラム光学素子等を採用しても構わない。 In the said embodiment, although the wire grid 3 was used as a reflection type polarizing plate, as long as it is a reflection type polarizing plate, you may employ | adopt another structure.
For example, as a reflective polarizing plate, a polymer-type layered polarization in which an organic material having a refractive index anisotropy (birefringence) such as a polarization separation element formed by a dielectric multilayer film or a liquid crystal material is layered. A plate, an optical element that combines a quarter-wave plate with a circularly polarizing reflector that separates unpolarized light into clockwise circularly polarized light and counterclockwise circularly polarized light, and reflects and transmits polarized light using Brewster's angle You may employ | adopt the optical element isolate | separated into polarized light, or the hologram optical element using a hologram.

本発明は、プレゼンテーションやホームシアターに用いられるプロジェクターとして利用できる。 The present invention can be used as a projector used in presentations and home theaters.

１・・・プロジェクター、３・・・反射型偏光板、４・・・反射型光変調装置、６・・・支持体、７・・・クロスダイクロイックプリズム（色合成光学装置）、８・・・接続部材、９・・・固定部材、１０・・・回転規制部、７１・・・光入射面、７２・・・交差端面、９１・・・突起部、９２・・・垂直壁、８１１・・・張出部、８１１Ａ・・・挿通部、８１１Ｂ・・・切欠部、９２１・・・当接面。 DESCRIPTION OF SYMBOLS 1 ... Projector, 3 ... Reflection type polarizing plate, 4 ... Reflection type light modulation device, 6 ... Support body, 7 ... Cross dichroic prism (color synthesis optical device), 8 ... Connection member, 9 ... fixing member, 10 ... rotation restricting portion, 71 ... light incident surface, 72 ... intersecting end surface, 91 ... projection, 92 ... vertical wall, 811 ... -Overhang part, 811A ... insertion part, 811B ... notch part, 921 ... contact surface.

Claims

A plurality of reflective light modulation devices that respectively modulate a plurality of color lights for each color light;
A plurality of reflection-type polarizing plates, each of which is arranged to be inclined with respect to the plurality of reflection-type light modulation devices, and respectively separates the plurality of incident color lights.
A color synthesizing optical device that synthesizes each color light modulated by the plurality of reflection type light modulation devices and polarized and separated by the plurality of reflection type polarizing plates;
A connection member fixed to the color synthesis optical device;
A support that supports the reflective light modulator and the reflective polarizing plate;
A fixing member interposed between the connection member and the support, and fixing the connection member and the support;
One of the connection member and the support is
Having an insertion part through which a part of the fixing member is inserted;
The fixing member is
A protrusion that passes through the insertion portion;
A projector comprising: an abutting surface that abuts on one of the connection member and the support.

The projector according to claim 1.
The connecting member is
The color synthesizing optical device is fixed to at least one of a pair of intersecting end surfaces intersecting a plurality of light incident surfaces on which the plurality of color lights respectively enter, and extends to the upstream side of the optical path and overlaps the support in a plan view. Has an exit,
The insertion part is
A projector characterized in that it is formed in the overhanging portion.

The projector according to claim 2,
The connecting member is
A pair is provided and fixed to both of the pair of crossing end faces,
The fixing member is
A pair of projectors provided with the support interposed therebetween.

The projector according to claim 2 or 3,
In the insertion part and the protrusion part,
A projector that includes a rotation restricting portion that restricts the rotation of the protruding portion around an axis along the insertion direction of the protruding portion into the inserting portion.

The projector according to any one of claims 2 to 4,
The fixing member is
A vertical wall extending perpendicularly to the protrusion from one end of the protrusion to the upstream side of the optical path and having the contact surface formed thereon,
In the overhang part,
A cutout portion communicating with the insertion portion is formed at a position overlapping the vertical wall in plan view.