JP2002318367A5

JP2002318367A5 -

Info

Publication number: JP2002318367A5
Application number: JP2001255124A
Authority: JP
Filing date: 2001-08-24
Publication date: 2005-03-17
Anticipated expiration: 2021-08-24

Description

【００１３】
また、前述の固定板は、前記プリズムの固定面に形成される膨出部を有し、前記位置調整工程は、接着剤が未硬化の状態で、かつ、プリズムが膨出に当接した状態でプリズムを固定板に三次元的に位置調整することが好ましい。[0013]
State also, the aforementioned fixing plate has a bulging out part that will be formed in the fixed surface of the prism, it said position adjusting step, the adhesive is in an uncured state, and the prism is in contact with the bulge Preferably, the prisms are three-dimensionally positioned on the fixed plate.

【００１４】
従来のような方法で色合成用のプリズムと固定板とを接着固定する際、図１（ａ）に示すように、切断精度の悪いプリズム１５０を固定板１５２に対して押しつけて固定すると、両面同士がならってしまい、プリズム１５０の蒸着面および側面外形位置が傾くことで、プリズム１５０を位置調整しても、所定の光軸上にプリズム１５０を配置することができなくなる。
本発明では、図１（ｂ）に示すように、固定板１５２の端面に膨出部１５２Ｂが形成され、色合成用のプリズム１５０は、固定板１５２の膨出部１５２Ｂと接触した状態で、紫外線硬化型接着剤１５３により接着されることにより、色合成用のプリズム１５０と固定板１５２の膨出部１５２Ｂとは点で接触し、色合成用のプリズム１５０の切断精度が悪い場合でも、プリズム１５０の蒸着面および側面外形位置を三次元的に位置調整することができ、プリズム１５０の切断精度に影響されずに、プリズム１５０の蒸着面および側面外形位置精度を確保し、プリズム１５０と固定板１５２とを適正に固定できる。[0014]
In bonding and fixing the prism for color synthesis and the fixing plate by a conventional method, as shown in FIG. 1A, when the prism 150 with poor cutting accuracy is pressed against the fixing plate 152 and fixed, Because the deposition surface and the side surface external position of the prism 150 are inclined, the prism 150 can not be disposed on a predetermined optical axis even if the position of the prism 150 is adjusted.
In the present invention, as shown in FIG. 1 (b), bulging out portion 152B is formed on the end face of the fixing plate 152, a prism 150 for color synthesis, in contact with 152B bulging portion of the fixed plate 152, By bonding with the ultraviolet curing adhesive 153, the prism 150 for color synthesis and the bulging portion 152B of the fixing plate 152 are in point contact, and even if the cutting accuracy of the prism 150 for color synthesis is poor, the prism The position of the deposition surface and side surface of the 150 can be three-dimensionally adjusted, and the deposition surface and side surface position accuracy of the prism 150 can be secured without being affected by the cutting accuracy of the prism 150. 152 can be properly fixed.

【００２０】
また、前述の色合成光学系において、前記固定板は、前記プリズムの固定面に形成される膨出部を有し、前記プリズムは、該プリズムの少なくとも一部が前記膨出部と当接した状態で前記固定板に接着固定されることが好ましい。
このような構成では、固定板は、プリズムの固定面に形成される膨出部を有し、プリズムは、該プリズムの少なくとも一部が膨出部と当接した状態で接着されるので、プリズムを固定板に対して三次元的に位置調整することができ、前述の位置調整方法と同様な作用および効果を享受することができる。
ここで、前記光硬化型接着剤は、前記固定板の膨出部によって形成される、前記プリズムの下面と前記固定板との隙間を埋めるように塗布されることが好ましい。
さらに、前記固定板の膨出部の高さは、前記プリズム下面における切断精度最大公差に対して、５０〜１００％の範囲にあり、該膨出部の曲率半径は、前記プリズム下面の面積に対して、該膨出部の面積が、１〜５０％になるように決定されることが好ましい。
このような構成では、プリズムと固定板との間に介在する光硬化型接着剤と上記適正な寸法により形成された膨出部により、高精度に位置調整された色合成光学系を安定に維持することができる。[0020]
Further, in the aforementioned color synthesizing optical system, wherein the fixing plate has a bulging out part that will be formed in the fixed surface of the prism, said prism has at least a portion of the prism is contact with the bulging portion It is preferable to adhesively fix to the fixing plate in the state.
In such a configuration, the fixing plate has a bulging out part that will be formed in the fixed surface of the prism, the prism is at least a part of the prisms are bonded in a state of contact with the bulged portion, a prism Can be three-dimensionally adjusted with respect to the fixed plate, and the same operations and effects as those of the above-described alignment method can be obtained.
Here, it is preferable that the photocurable adhesive be applied so as to fill a gap between the lower surface of the prism and the fixing plate, which is formed by the bulging portion of the fixing plate.
Furthermore, the height of the bulging portion of the fixed plate is in the range of 50 to 100% with respect to the maximum cutting accuracy tolerance on the lower surface of the prism, and the radius of curvature of the bulging portion is the area of the lower surface of the prism On the other hand, it is preferable that the area of the bulging portion is determined to be 1 to 50%.
In such a configuration, it is possible to stably maintain the color synthesis optical system whose position is adjusted with high accuracy by the photocurable adhesive interposed between the prism and the fixing plate and the bulging portion formed by the above-mentioned appropriate dimensions. can do.

Claims

A light source, a color separation optical system for separating a light flux emitted from the light source into a plurality of color lights, a plurality of light modulation devices for modulating the respective color lights separated by the color separation optical system according to image information; A housing for an optical component for housing optical components constituting the color separation optical system in order to manufacture a projector including a color combining optical system which combines light beams modulated by respective light modulation devices to form an optical image. What is claimed is: 1. A method of adjusting a position of a color combining optical system, comprising adjusting a position of the color combining optical system with respect to a body, comprising:
A laser beam emitting step of emitting a white laser beam on an optical axis of a light flux passing through the inside of the optical component casing;
A synthetic light detection step in which each color light obtained by separating this white laser light by the color separation optical system is made incident on the light incident end face of the color synthesis optical system, and the luminous flux synthesized by the color synthesis optical system is detected by a detection device When,
And a position adjustment step of adjusting the position of the color synthesis optical system with respect to the optical component casing while carrying out the synthesis light detection step.

In the position adjustment method of a color combining optical system according to claim 1,
The detection device is a point sensor,
A position adjustment method of a color combining optical system, comprising: an adjustment end determination step of determining an end of the position adjustment step while monitoring a detection state of the combined light detection step.

In the position adjustment method of a color combining optical system according to claim 2,
The adjustment end determination step determines that the adjustment is ended when the area of the combined light detected by the point sensor is minimum, the position adjustment method of the color combining optical system.

In the position adjustment method of a color combining optical system according to any one of claims 2 and 3.
The color synthesis optical system includes a prism for color light synthesis, and a fixing plate bonded to the lower surface of the prism with a light curing adhesive and mechanically fixed to the optical component casing.
The position adjustment step is performed in a state in which the photocurable adhesive is not cured.
A method for adjusting the position of a color synthesis optical system, comprising: an adhesive curing step of irradiating the light curing adhesive with light rays to cure the adhesive after the adjustment completion determination step.

In the position adjustment method of a color combining optical system according to claim 4,
The fixing plate has a bulging out part that will be formed in the fixed surface of the prism,
In the above-mentioned position adjustment step, the prism is three-dimensionally positioned on the fixing plate in a state where the adhesive is not cured and the prism is in contact with the bulging portion. Alignment method.

In the position adjustment method of a color combining optical system according to claim 5,
The photocurable adhesive is applied by filling the gap between the lower surface of the prism and the fixing plate, which is formed by the bulging portion of the fixing plate. Method.

In the position adjustment method of a color combining optical system according to claim 5 or 6,
The height of the bulging portion of the fixed plate is in the range of 50 to 100% with respect to the maximum tolerance for cutting accuracy on the lower surface of the prism, and the radius of curvature of the bulging portion is relative to the area of the lower surface of the prism The position adjustment method of a color combining optical system, wherein the area of the bulging portion is determined to be 1 to 50%.

A light source, a color separation optical system for separating a light flux emitted from the light source into a plurality of color lights, a plurality of light modulation devices for modulating the respective color lights separated by the color separation optical system according to image information; A housing for an optical component for housing optical components constituting the color separation optical system in order to manufacture a projector including a color combining optical system which combines light beams modulated by respective light modulation devices to form an optical image. A position adjustment system of a color combining optical system for adjusting the position of the color combining optical system with respect to a body, comprising:
A laser light emitting device for supplying white laser light on the optical axis of the light flux passing through the inside of the optical component casing;
A synthetic light detection device for making each color light separated by the color separation optical system incident on the light incident end face of the color synthesis optical system and detecting the luminous flux synthesized by the color synthesis optical system;
And a position adjusting device for adjusting the position of the color combining optical system based on the combined light detected by the combined light detecting device.

In the position adjustment system of a color combining optical system according to claim 8,
The position adjustment of a color combining optical system characterized in that the combined light detection device includes an adjustment end determination unit that determines the end of position adjustment of the color combining optical system while monitoring the detection state of the combined light. system.

In the alignment control system of a color combining optical system according to claim 8 or 9,
The color synthesis optical system includes a prism for color synthesis, and a fixing plate bonded to the lower surface of the prism with a photocurable adhesive and mechanically fixed to the optical component casing.
The position adjusting system includes a prism holding portion for holding the prism, and a light beam irradiating portion for emitting a light beam for curing the photo-curing adhesive. .

A color combining optical system comprising: a prism for color combining; and a fixing plate bonded to the lower surface of the prism with a photocurable adhesive and mechanically fixed to a housing for an optical component,
The fixing plate has a bulging out part that will be formed in the fixed surface of the prism,
The color combining optical system, wherein the prism is adhesively fixed to the fixing plate in a state where at least a part of the prism is in contact with the bulging portion.

In the color combining optical system according to claim 11,
The color combining optical system, wherein the photocurable adhesive is applied so as to fill a gap between the lower surface of the prism and the fixing plate, which is formed by the bulging portion of the fixing plate.

In the color combining optical system according to claim 11 or 12,
The height of the bulging portion of the fixed plate is in the range of 50 to 100% with respect to the maximum tolerance for cutting accuracy on the lower surface of the prism, and the radius of curvature of the bulging portion is relative to the area of the lower surface of the prism An area of the bulging portion is determined to be 1 to 50%.

A projector comprising a color combining optical system adjusted by the method of adjusting a color combining optical system according to any one of claims 1 to 7.