JP3272078B2 - Light source device - Google Patents
Light source deviceInfo
- Publication number
- JP3272078B2 JP3272078B2 JP01961893A JP1961893A JP3272078B2 JP 3272078 B2 JP3272078 B2 JP 3272078B2 JP 01961893 A JP01961893 A JP 01961893A JP 1961893 A JP1961893 A JP 1961893A JP 3272078 B2 JP3272078 B2 JP 3272078B2
- Authority
- JP
- Japan
- Prior art keywords
- light source
- light
- optical axis
- row
- emitted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Liquid Crystal (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液晶プロジェクタのバ
ックライトに適する光源装置に関し、特に輝度及び色度
が等しい複数の出射光が得られるようにした光源装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device suitable for a backlight of a liquid crystal projector, and more particularly to a light source device capable of obtaining a plurality of emitted lights having the same luminance and chromaticity.
【０００２】[0002]
【従来の技術】従来、液晶プロジェクタのバックライト
として、複数の光源を備える光源装置では、光源の出射
光軸が互いに平行に設定され、それぞれの光源の出射光
が互いに合成されることなく液晶パネルに入射するよう
に構成されている。2. Description of the Related Art Conventionally, in a light source device having a plurality of light sources as a backlight of a liquid crystal projector, the emission optical axes of the light sources are set parallel to each other, and the emission lights of the respective light sources are not combined with each other. It is configured to be incident on.
【０００３】[0003]
【発明が解決しようとする課題】このため、光源の輝
度、色度などのばらつきによって画像に輝度むらや色度
むらなどが生じるという問題がある。For this reason, there is a problem that unevenness in luminance, chromaticity, etc. occurs in an image due to variations in luminance, chromaticity, etc. of the light source.
【０００４】本発明は、上記の事情を考慮してなされた
ものであり、輝度及び色度が等しい複数の出射光が得ら
れるようにした光源装置を提供することを目的とする。The present invention has been made in consideration of the above circumstances, and has as its object to provide a light source device capable of obtaining a plurality of outgoing lights having the same luminance and chromaticity.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
め、本発明は、第１の光源と、出射光軸が第１の光源の
出射光軸に直交するｎ個の他の光源と、第１の光源から
の距離に対応して各他の光源から離れた位置で当該他の
光源の出射光線を直角方向に全反射するｎ個のリフレク
ターと、第１の光源の出射光軸又は各リフレクターの反
射光軸と各他の光源の出射光軸との交点に配置され、入
射光の一部分を直角方向に反射するとともに入射光の他
の一部分を透過させるΣｎ個のハーフミラーとを備える
ことを特徴とする．To achieve the above object, the present invention provides a first light source, and n other light sources whose output optical axis is orthogonal to the output optical axis of the first light source. N reflectors that totally reflect the emitted light of the other light source in a direction perpendicular to the other light source at a position distant from each other light source corresponding to the distance from the first light source; Σn half mirrors, which are arranged at the intersections of the reflection optical axis of the reflector and the emission optical axes of the other light sources, reflect a part of the incident light at right angles and transmit the other part of the incident light It is characterized by
【０００６】[0006]
【作用】第１の光源から出射する光線は、第１の光源の
出射光軸と第１の光源から数えて１番目の他の光源との
出射光軸との交点に配置された１列目のハーフミラーで
第１の光源の出射光軸方向に透過する光線とこれに直交
する方向、すなわち、１番目の他の光線の出射光軸方向
に反射される光線とに分光される。また、１番目の他の
光源から出射する光線は、そのハーフミラーで第１の光
源の出射光軸方向に反射される光線とそのハーフミラー
を１番目の他の光源の出射光軸方向に透過する光線とに
分光される。すなわち、このハーフミラーからは、第１
の光源の出射光軸方向と１番目の他の光源の出射光軸方
向とにそれぞれ第１の光源から出射された光線の一部分
と１番目の他の光源から出射された光線の一部分との合
成光線が分光されて出射される。The light beam emitted from the first light source is located at the intersection of the emission optical axis of the first light source and the emission optical axis with the first other light source counted from the first light source. Are split into a light beam that is transmitted in the direction of the emission optical axis of the first light source and a light beam that is reflected in the direction orthogonal to the first light source, that is, the light beam that is reflected in the direction of the emission optical axis of the first other light beam. Light rays emitted from the first other light source are reflected by the half mirror in the direction of the emission optical axis of the first light source and transmitted through the half mirror in the direction of the emission optical axis of the first other light source. And split into light rays. That is, from this half mirror, the first
Of a part of the light beam emitted from the first light source and a part of the light beam emitted from the first other light source in the emission optical axis direction of the light source and the emission optical axis direction of the first other light source, respectively. The light rays are split and emitted.
【０００７】このハーフミラーから１番目の他の光源の
出射光軸方向に出射された合成光線は、１番目の他の光
源の出射光軸上に配置された１列目の全反射ミラーによ
り１番目の他の光源の出射光軸に対して直角方向、すな
わち、第１の光源の出射光軸方向と平行方向に全反射さ
れる。[0007] The combined light beam emitted from the half mirror in the direction of the emission optical axis of the first other light source is reflected by the first-row total reflection mirror arranged on the emission optical axis of the first other light source. It is totally reflected in a direction perpendicular to the emission optical axis of the other light source, that is, in a direction parallel to the emission optical axis direction of the first light source.
【０００８】したがって、上記ハーフミラーの第１の光
源および他の光源の出射光軸方向の入射光に対する反射
率を１／２とすれば、上記１列目のハーフミラーから第
１の光源の出射光軸方向に出射される光線と、１番目の
全反射ミラーの反射光線との輝度及び色度を等しくする
ことができる。Accordingly, if the reflectance of the half mirror to the incident light in the direction of the emission optical axis of the first light source and the other light sources is halved, the emission of the first light source from the half mirror in the first row is performed. The brightness and chromaticity of the light beam emitted in the emission axis direction and the light beam reflected by the first total reflection mirror can be made equal.
【０００９】第１の光源から２番目の他の光源が設けら
れる場合には、更に、上記１列目のハーフミラーの出射
光軸及び１列目の全反射ミラーと２番目の他の光源の出
射光軸との各交点に２列目のハーフミラーが配置され、
２番目の他の光源の出射光軸上で２列２行目のハーフミ
ラーに関して２番目の他の光源と反対側に２列目の全反
射ミラーが配置される。In the case where the second other light source is provided from the first light source, furthermore, the emission optical axis of the first row half mirror and the total reflection mirror of the first row and the second other light source are further added. A half mirror in the second row is arranged at each intersection with the output optical axis,
A second column total reflection mirror is arranged on the side opposite to the second other light source with respect to the half mirror in the second column and second row on the emission optical axis of the second other light source.
【００１０】１列目のハーフミラーの出射光軸と２番目
の他の光源の出射光軸との交点に配置される２列１行目
のハーフミラーでは、第１の光源の出射光軸方向とこれ
に直交する２番目の他の光源の出射光軸方向とにそれぞ
れ１列目のハーフミラーの出射光線、すなわち、第１の
光源の出射光線の一部分及び１番目の他の光源の出射光
線の一部分の合成光線と２番目の他の光源の出射光線と
の合成光線が出射する。In the half mirror in the second row and the first row arranged at the intersection of the emission optical axis of the half mirror in the first column and the emission optical axis of the second other light source, the direction of the emission optical axis of the first light source is And the light beam emitted from the half mirror in the first row, that is, a part of the light beam emitted from the first light source and the light beam emitted from the first other light source in the emission optical axis direction of the second other light source orthogonal to this. Are emitted from the combined light beam of a part of the light source and the emitted light beam of the second other light source.
【００１１】１列目の全反射ミラーの反射光軸と２番目
の他の光源の出射光軸との交点に配置された２行目のハ
ーフミラーでは、１列目の全反射ミラーの反射光軸方
向、すなわち、第１の光源の出射光軸方向と２番目の他
の光源の出射光軸方向とに、１列目の全反射ミラーの反
射光線、すなわち、第１の光源の出射光線の一部分及び
１番目の他の光源の出射光線の一部分の合成光線と２列
１行目のハーフミラーの出射光、すなわち、第１の光源
の出射光線の一部分及び１番目の他の光源の出射光線の
一部分の合成光線の一部分と２番目の他の光源の出射光
線の一部分との合成光線が出射する。In the half mirror in the second row arranged at the intersection of the reflection optical axis of the first column total reflection mirror and the emission optical axis of the second other light source, the reflected light of the first column total reflection mirror is used. In the axial direction, that is, in the direction of the emission optical axis of the first light source and in the direction of the emission optical axis of the second other light source, the reflected light of the total reflection mirror in the first row, that is, the emission light of the first light source. The combined light of a part and a part of the light emitted from the first other light source and the light emitted from the half mirror in the second column and the first row, that is, a part of the light emitted from the first light source and the light emitted from the first other light source A combined light beam of a part of the combined light beam of the part and a part of the emitted light beam of the second other light source is emitted.
【００１２】２番目の他の光源の出射光軸上に配置され
た２列目の全反射ミラーは、２列２行目のハーフミラー
から２番目の他の光源の出射光軸方向に出射された光線
を直角方向、すなわち、第１の光源の出射光軸方向と平
行方向に全反射する。The total reflection mirror in the second column arranged on the emission optical axis of the second other light source is emitted from the half mirror in the second column and second row in the direction of the emission optical axis of the second other light source. The reflected light is totally reflected in a direction perpendicular to the light source, that is, in a direction parallel to the direction of the emission optical axis of the first light source.
【００１３】したがって、１列目のハーフミラーの第１
の光源および他の光源の出射光軸方向からの入射光に対
する反射率を１／２とし、２列１行目のハーフミラーの
第１の光源および他の光源の出射光軸方向からの入射光
に対する反射率を１／３とし、２列２行目のハーフミラ
ーの第１の光源および他の光源の出射光軸方向からの入
射光に対する反射率を１／２とすれば、２列１行目のハ
ーフミラー、２列２行目のハーフミラー及び２列目の全
反射ミラーからそれぞれ第１の光源の出射光軸方向へ出
射される各光線の輝度及び色度を等しくすることができ
る。Therefore, the first half mirror of the first row
The reflectance of the first light source and the other light sources with respect to the incident light from the outgoing optical axis direction is １ ／, and the incident light from the first light source and the other light source of the half mirror in the second column and the first row in the outgoing optical axis direction. If the reflectivity of the half mirror in the second column and the second row with respect to the incident light from the first light source and the other light sources from the direction of the emission optical axis is 、 ２, the second column and the second row The brightness and chromaticity of each light beam emitted from the half mirror in the second row, the half mirror in the second row and the second row, and the total reflection mirror in the second column in the direction of the optical axis of the first light source can be made equal.
【００１４】ｎ番目の他の光源が設けられる場合には、
ｎ番目の他の光源の出射光軸と、各全反射ミラーの反射
光軸との各交点にｎ列目のｎ個のハーフミラーを設け、
更に、ｎ番目の他の光源の出射光軸上にｎ列ｎ行目のハ
ーフミラーからｎ番目の他の光源の出射光軸方向に出射
する光線を直角方向に反射するｎ列目の全反射ミラーが
配置される。このｎ列目のｋ行目に配置されるハーフミ
ラーの第１の光源および他の光源の出射光軸方向の入射
光に対する反射率を１／（ｎ＋２−ｋ）とすれば、ｎ列
目の各ハーフミラーから第１の光源の出射光軸方向へ出
射される各光線の輝度及び色度を等しくすることができ
る。If an nth other light source is provided,
n half mirrors in the nth column are provided at each intersection of the emission optical axis of the nth other light source and the reflection optical axis of each total reflection mirror,
Furthermore, total reflection in the n-th column reflects the light emitted from the half mirror in the n-th row and the n-th row in the direction of the emission optical axis of the n-th other light source on the emission optical axis of the n-th other light source in the orthogonal direction. A mirror is arranged. Assuming that the reflectance of the half mirror arranged on the k-th row in the n-th column with respect to the incident light in the emission optical axis direction of the first light source and the other light source is 1 / (n + 2-k), the n-th column is provided. The brightness and chromaticity of each light beam emitted from each half mirror in the emission optical axis direction of the first light source can be made equal.
【００１５】[0015]
【実施例】本発明の実施例に係る光源装置を図面に基づ
いて具体的に説明すれば、以下の通りである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A light source device according to an embodiment of the present invention will be specifically described below with reference to the drawings.
【００１６】図１の構成図に示す本発明の一実施例に係
る光源装置は、第１の光源１と、１つの他の光源２とを
有し、第１の光源１の光線はリフレクター３によって紙
面の左方から右方に向かう平行光線に変換して出射さ
れ、他の光源２の光線は他のリフレクター４によって第
１の光源の出射光軸と直交する方向、すなわち、紙面の
上方から下方に向かう平行光線に変換して出射される。A light source device according to an embodiment of the present invention shown in the configuration diagram of FIG. 1 has a first light source 1 and one other light source 2, and a light beam of the first light source 1 is reflected by a reflector 3. The light is converted into a parallel light beam that travels from the left to the right of the paper surface, and is emitted. The light beam of the other light source 2 is directed by another reflector 4 in a direction orthogonal to the emission optical axis of the first light source, that is, from above the paper surface. The light is converted into a parallel light beam directed downward and emitted.
【００１７】この光源装置には、第１の光源１の出射光
軸と他の光源２の出射光軸との交点に配置されるハーフ
ミラー５と、他の光源２の出射光軸上でハーフミラー５
に関して他の光源２と反対側に配置された全反射ミラー
６とを備え、上記ハーフミラー５の第１の光源１および
他の光源の出射光軸方向の反射率は１／２としている。This light source device includes a half mirror 5 disposed at the intersection of the emission optical axis of the first light source 1 and the emission optical axis of the other light source 2, and a half mirror 5 on the emission optical axis of the other light source 2. Mirror 5
And a total reflection mirror 6 disposed on the opposite side to the other light source 2 with respect to the first light source 1 and the other light source of the half mirror 5.
【００１８】この光源装置においては、第１の光源１か
ら出射された光線の１／２がハーフミラー５を透過して
直進し、残りの１／２がハーフミラー５で直角方向に反
射される。In this light source device, one half of the light beam emitted from the first light source 1 passes through the half mirror 5 and goes straight, and the other half is reflected by the half mirror 5 in the right angle direction. .
【００１９】また、他の光源から出射された光線の１／
２がハーフミラー５で直角方向に反射され、第１の光源
１から出射されハーフミラー５を透過した光線と合成さ
れて、第１の光源１の出射光軸方向に出射される。Also, 1/1 of the light beam emitted from another light source
2 is reflected by the half mirror 5 at right angles, is combined with a light beam emitted from the first light source 1 and transmitted through the half mirror 5, and emitted in the direction of the emission optical axis of the first light source 1.
【００２０】他の光源から出射された光線の残りの１／
２がハーフミラー５を透過し、第１の光源１から出射さ
れハーフミラー５で反射された光線と合成されて全反射
ミラー６に入射し、直角方向に反射して第１の光源１の
出射光軸方向に出射する。The remaining 1/1 of the light beam emitted from another light source
2 is transmitted through the half mirror 5, is combined with the light beam emitted from the first light source 1 and reflected by the half mirror 5, enters the total reflection mirror 6, is reflected in a right angle direction, and is emitted from the first light source 1. Light is emitted in the direction of the emission axis.
【００２１】ハーフミラー５及び全反射ミラー６から第
１の光源１の出射光軸方向に出射する合成光線は同じ成
分を有しているので、同じ輝度と色度とを有する。Since the combined light beams emitted from the half mirror 5 and the total reflection mirror 6 in the direction of the optical axis of the first light source 1 have the same components, they have the same luminance and chromaticity.
【００２２】図２の構成図に示す本発明の他の実施例に
おいては、第１の光源１１と２つの他の光源１２，１３
とを有し、第１の光源１１の光線はリフレクター１４に
よって紙面の左方から右方に向かう平行光線に変換して
出射され、各他の光源１２，１３の光線はそれぞれ他の
リフレクター１５，１６によって第１の光源１１の出射
光軸と直交する方向、すなわち、紙面の上方から下方に
向かう平行光線に変換して出射される。In another embodiment of the invention shown in the block diagram of FIG. 2, a first light source 11 and two other light sources 12, 13 are shown.
The light beam of the first light source 11 is converted by the reflector 14 into a parallel light beam directed from left to right on the plane of the paper and emitted, and the light beams of the other light sources 12 and 13 are respectively reflected by the other reflectors 15 and 15. The light is converted by 16 into a direction orthogonal to the emission optical axis of the first light source 11, that is, converted into a parallel light beam that goes downward from above the paper surface and emitted.
【００２３】第１の光源１１に近い方から数えて１番目
の他の光源１２の出射光軸上には、第１の光源１１の出
射光軸との交点に１列目のハーフミラー１７が配置さ
れ、このハーフミラー１７に対して１番目の他の光源１
２と反対側に１列目の全反射ミラー１９が配置される。On the emission optical axis of the first other light source 12 counted from the side closer to the first light source 11, a half mirror 17 in the first row is provided at the intersection with the emission optical axis of the first light source 11. 1st other light source 1
On the side opposite to 2, the first-row total reflection mirror 19 is arranged.
【００２４】また、第１の光源１１に近い方から数えて
２番目の他の光源１３の出射光軸上には、第１の光源１
１の出射光軸との交点に２列１行目のハーフミラー１８
が、１列目の全反射ミラー１９の出射光軸との交点に２
列２行目のハーフミラー２０が配置され、このハーフミ
ラー２０に対して２番目の他の光源１３と反対側に２列
目の全反射ミラー２１が配置される。The first light source 1 is located on the emission optical axis of the second other light source 13 counted from the side closer to the first light source 11.
The half mirror 18 of the second column and the first row is located at the intersection with the outgoing optical axis of No. 1.
At the intersection with the outgoing optical axis of the total reflection mirror 19 in the first row.
A half mirror 20 in the second row of the column is arranged, and a total reflection mirror 21 in the second column is arranged on the half mirror 20 on the side opposite to the second other light source 13.
【００２５】１列目のハーフミラー１７の第１の光源１
および他の光源の出射光軸方向への反射率は１／２に、
２列１行目のハーフミラー１８の第１の光源１および他
の光源の出射光軸方向への反射率は１／３に、２列２行
目のハーフミラー２０の第１の光源１および他の光源の
出射光軸方向への反射率は１／２にしてある。The first light source 1 of the half mirror 17 in the first row
And the reflectivity of the other light sources in the direction of the emission optical axis is halved,
The reflectivity of the half mirror 18 in the second column and the first row in the emission optical axis direction of the first light source 1 and the other light sources is reduced to 1/3, and the first light source 1 and the second mirror in the second mirror and the second row of the half mirror 20 are arranged in the second row and the second row. The reflectance of the other light sources in the direction of the emission optical axis is set to 1/2.
【００２６】この光源装置においては、１列目のハーフ
ミラー１７に入射した第１の光源１１の光線ａ1 の１／
２の光線ａ2 がハーフミラー１７を透過し、残りの１／
２の光線ａ4 がハーフミラー１７で直角方向に反射され
る。また、１番目の他の光源１２から出射された光線ｂ
1 の１／２の光線ｂ2 がハーフミラー１７で直角方向に
反射され、第１の光源１１から出射されハーフミラー１
７を透過した光線ａ2 と合成されて、第１の光源１の出
射光軸方向、すなわち、２列１行目のハーフミラー１８
に出射される。In this light source device, 1/1 of the light beam a 1 of the first light source 11 incident on the half mirror 17 in the first row.
The second light beam a 2 passes through the half mirror 17 and the remaining 1 /
The second light ray a 4 is reflected by the half mirror 17 in the right angle direction. Also, the light beam b emitted from the first other light source 12
1 1/2 of the beam b 2 is reflected at a right angle by the half mirror 17, the half mirror 1 is emitted from the first light source 11
7 is combined with the light beam a 2 transmitted through the first light source 1, that is, the half mirror 18 in the second column and the first row.
Is emitted.
【００２７】更に、１番目の他の光源１２から出射され
た光線ｂ1 の他の１／２の光線ｂ4がハーフミラー１７
を透過し、このハーフミラー１７で反射された第１の光
源１１の出射光線の１／２の光線ａ4 と合成されて１列
目の全反射ミラー１９に入射する。Further, another half ray b 4 of the ray b 1 emitted from the first other light source 12 is reflected by the half mirror 17.
, And is combined with a ray a 4 , which is a half of the emitted light of the first light source 11, reflected by the half mirror 17, and enters the first-row total reflection mirror 19.
【００２８】２列１行目のハーフミラー１８では、１列
目のハーフミラー１７から入射した合成光線、すなわ
ち、光線ａ2 及び光線ｂ2 の各２／３の光線ａ3 ，ｂ3
が透過し、２番目の他の光源１３から出射された光線ｃ
1 のうち、２列１行目のハーフミラー１８により直角に
反射される１／３の光線ｃ2 と合成されて、第１の光源
１の出射光軸方向に出射する。即ち、第１の光源１１の
出射光線ａ1 の（１／２）×（２／３）＝１／３の光線
ａ3 と、１番目の他の光源１２の出射光線ｂ1 の（１／
２）×（２／３）＝１／３の光線ｂ3 と、２番目の他の
光源１３の出射光線の１／３の光線ｃ2 とを合成した合
成光線が２列１行目のハーフミラー１８から第１の光源
１１の出射光軸方向に出射する。In the half mirror 18 in the second column and the first row, a combined light beam incident from the half mirror 17 in the first column, that is, two thirds of the light beams a 3 and b 3 of the light beam a 2 and the light beam b 2.
Is transmitted and the light ray c emitted from the second other light source 13
Of 1, two rows is combined with light c 2 1/3 which is reflected at a right angle by the first row of the half mirror 18, to emit the first emission light axis direction of the light source 1. That is, the outgoing light beams a 1 of the first light source 11 (1/2) × (2/3) = 1/3 of the light beam a 3, the first other light sources 12 of the output light b 1 (1 /
2) A combined light beam obtained by combining a light beam b 3 of × (2/3) = 1/3 and a light beam c 2 of の of the light beam emitted from the second other light source 13 is a half of the second column and the first row. Light is emitted from the mirror 18 in the direction of the emission optical axis of the first light source 11.
【００２９】また、２列１行目のハーフミラー１８で
は、２番目の他の光源１３の出射光線ｃ1 の２／３の光
線ｃ3 が透過し、このハーフミラー１８により直角方向
に反射される１列目のハーフミラー１７の出射光線の１
／３の光線、すなわち、第１の光源１１の出射光線ａ1
の（１／２）×（１／３）＝１／６の光線ａ5 及び１番
目の他の光源１２の出射光線ｂ1 の（１／２）×（１／
３）＝１／６の光線ｂ5と合成されて２列２行目のハー
フミラー２０に出射する。In the half mirror 18 in the second column and the first row, a light ray c 3 which is ／ of the light ray c 1 emitted from the second other light source 13 is transmitted and reflected by the half mirror 18 in a right angle direction. 1 of the rays emitted from the half mirror 17 in the first row
/ 3, that is, the outgoing ray a 1 of the first light source 11
(1/2) × (1/3) = 1/6 of the light beam a 5 and the (光線) × (1/1) of the light beam b 1 emitted from the first other light source 12
3) The light beam is combined with the light beam b 5 of １ ／ and is emitted to the half mirror 20 in the second column and the second row.
【００３０】２列２行目のハーフミラー２０では、２列
１列目のハーフミラー１８から入射した合成光線のうち
の１／２が直角方向に反射され、１列目の全反射ミラー
１９から入射した光線、即ち、第１の光源１１の出射光
線ａ1 の１／２の光線ａ6 及び１番目の他の光源１２の
出射光線ｂ1 の１／２の光線ｂ6 と合成されて第１の光
源１の出射光軸方向に出射される。即ち、第１の光源１
１の出射光線ａ1 の（１／２）×（１／３）×（１／
２）＋（１／２）×（１／２）＝１／３の光線ａ7 と、
１番目の他の光源１２の出射光線ｂ1 の（１／２）×
（１／３）×（１／２）＋（１／２）×（１／２）＝１
／３の光線ｂ7 と、２番目の他の光源１３の出射光線ｃ
1 （２／３）×（１／２）＝１／３の光線ｃ4 との合成
光線が２列２行目のハーフミラー２０から第１の光源１
の出射光軸方向に出射する。In the half mirror 20 in the second column and the second row, half of the combined light beams incident from the half mirror 18 in the second column and the first column are reflected in the right angle direction, and The incident light beam, that is, a light beam a 6 that is １ ／ of the light beam a 1 emitted from the first light source 11 and a light beam b 6 that is ２ of the light beam b 1 that is emitted from the first other light source 12 are combined. The light is emitted in the direction of the emission optical axis of the first light source 1. That is, the first light source 1
1 of the emission light a 1 (1/2) × (1/3 ) × (1 /
2) a ray a 7 of + (１ ／) × (１ ／) = 1/3;
(1/2) × of the outgoing ray b 1 of the first other light source 12
(1/3) x (1/2) + (1/2) x (1/2) = 1
/ 3 light beam b 7 and the outgoing light beam c of the second other light source 13
1 The combined light beam with the light beam c 4 of (2/3) × (1/2) = 1/3 is transmitted from the half mirror 20 in the second column and the second row to the first light source 1
In the direction of the exit optical axis.
【００３１】また、２列２行目のハーフミラー２０か
ら、第１の光源１１の出射光軸方向に出射するのと同じ
成分の合成光線が２列目の全反射ミラー２１に出射さ
れ、この全反射ミラー２１によって直角方向に反射され
る。From the half mirror 20 in the second column and the second row, a combined light beam having the same component as that emitted in the direction of the emission optical axis of the first light source 11 is emitted to the total reflection mirror 21 in the second column. The light is reflected at right angles by the total reflection mirror 21.
【００３２】したがって、この光源装置においては、２
列目の各ハーフミラー１８，２０及び全反射ミラー２１
から同じ成分の合成光線が平行に射出されることにな
る。Therefore, in this light source device, 2
Each half mirror 18, 20 and total reflection mirror 21 in the row
Will emit a combined light beam of the same component in parallel.
【００３３】図３の構成図に示す本発明の又他の実施例
に係る光源装置は、第１の光源３１と、３つの他の光源
３２，３３，３４とを備え、第１の光源３１の光線はリ
フレクター３５によって紙面の左方から右方に向かう平
行光線に変換して出射され、各他の光源３２，３３，３
４の光線はそれぞれ他のリフレクター３６，３７，３８
によって第１の光源３１の出射光軸と直交する方向、す
なわち、紙面の上方から下方に向かう平行光線に変換し
て出射される。A light source device according to still another embodiment of the present invention shown in the configuration diagram of FIG. 3 includes a first light source 31 and three other light sources 32, 33, and 34. Is converted by the reflector 35 into a parallel light beam directed from the left to the right of the paper surface and emitted, and the other light sources 32, 33, 3
The light rays of No. 4 are respectively reflected by the other reflectors 36, 37 and 38.
As a result, the light is converted into a parallel light beam that is directed in a direction perpendicular to the emission optical axis of the first light source 31, that is, from the upper side to the lower side of the paper, and is emitted.
【００３４】第１の光源３１に近い方からｎ番目の他の
光源の出射光軸上には、第１の光源３１からの距離に比
例してｎ番目の他の光源から遠く離れる位置にそれぞれ
ｎ列目の全反射ミラーが配置され、第１の光源３１の出
射光軸又は１列目からｎ−１列目の各全反射ミラーの反
射光軸とのｎ個の各交点にそれぞれハーフミラーが配置
される。On the emission optical axis of the n-th other light source from the one closer to the first light source 31, a position farther from the n-th other light source is proportional to the distance from the first light source 31. A half-mirror is provided at each of n intersections with the emission optical axis of the first light source 31 or the reflection optical axes of the total reflection mirrors of the first to (n-1) th columns. Is arranged.
【００３５】すなわち、第１の光源３１に近い方から１
番目の他の光源３２の出射光軸上には、第１の光源３１
の出射光軸との交点に１個の１列目のハーフミラー３９
が配置され、このハーフミラー３９に対して１番目の他
の光源３２と反対側に１列目の全反射ミラー４２が配置
される。That is, 1 from the side closer to the first light source 31
The first light source 31 is positioned on the emission optical axis of the other light source 32.
At the intersection with the outgoing optical axis of the first half mirror 39 in the first row
Are arranged, and a first-row total reflection mirror 42 is arranged on the half mirror 39 on the side opposite to the first other light source 32.
【００３６】また、第１の光源３１に近い方から２番目
の他の光源３３の出射光軸上には、第１の光源３１の出
射光軸との交点及び１列目の全反射ミラー４２の出射光
軸との交点にそれぞれ１個のハーフミラー４０，４３が
配置され、２列２行目のハーフミラー４３に対して２番
目の他の光源３３と反対側に２列目の全反射ミラー４５
が配置される。Further, on the emission optical axis of the second light source 33 from the side closer to the first light source 31, the intersection with the emission optical axis of the first light source 31 and the first-row total reflection mirror 42 Each of the half mirrors 40 and 43 is disposed at the intersection with the outgoing optical axis, and the second column of total reflection is opposite to the second other light source 33 with respect to the half mirror 43 in the second column and the second row. Mirror 45
Is arranged.
【００３７】更に、第１の光源３１に近い方から３番目
の他の光源３４の出射光軸上には、第１の光源３１の出
射光軸との交点、１列目の全反射ミラー４２の反射光軸
との交点及び２列目の全反射ミラー４５の反射光軸との
交点にそれぞれ１個のハーフミラー４１，４４，４６が
配置され、３列３行目のハーフミラー４６に対して３番
目の他の光源３４と反対側に３列目の全反射ミラー４７
が配置される。Further, on the outgoing optical axis of the third light source 34 closest to the first light source 31, an intersection with the outgoing optical axis of the first light source 31, the first-row total reflection mirror 42 is provided. Each of the half mirrors 41, 44, and 46 is disposed at the intersection with the reflected optical axis of the third mirror and the intersection with the reflected optical axis of the total reflection mirror 45 in the second column. The third row of total reflection mirrors 47 on the side opposite to the third other light source 34
Is arranged.
【００３８】これら１＋２＋…＋ｎ＝Σｎ個のハーフミ
ラー３９〜４１，４３，４４，４６の第１の光源３１お
よび他の光源の出射光軸方向からの入射光に対する反射
率は列数をｎ、行数をｋとすれば、１／（ｎ＋２−ｋ）
としている。すなわち、１列目のハーフミラー３９、２
列２行目のハーフミラー４３及び３列３行目のハーフミ
ラー４６の第１の光源３１および他の光源の出射光軸方
向からの入射光に対する反射率は１／２に、２列１行目
のハーフミラー４０及び３列２行目のハーフミラー４４
の第１の光源３１および他の光源の出射光軸方向からの
入射光に対する反射率は１／３に、３列１行目のハーフ
ミラー４１の第１の光源３１および他の光源の出射光軸
方向からの入射光に対する反射率は１／４にしてある。.. + N = Σn number of half mirrors 39 to 41, 43, 44, and 46 for the first light source 31 and the reflectance of the other light sources with respect to the incident light from the direction of the emission optical axis are represented by n columns. If the number of rows is k, 1 / (n + 2-k)
And That is, the half mirrors 39, 2 in the first row
The reflectance of the half mirror 43 in the second row of the column and the half mirror 46 in the third row of the third column with respect to the incident light of the first light source 31 and the other light sources from the direction of the emission optical axis is に, and that of the second column, one row The half mirror 40 of the eye and the half mirror 44 of the third column and the second row
The reflectance of the first light source 31 and the other light sources with respect to the incident light from the emission optical axis direction is reduced to 1/3, and the emission light of the first light source 31 of the half mirror 41 of the third column and the first row and the other light sources. The reflectance for the incident light from the axial direction is set to 1/4.
【００３９】この光源装置においては、３列目の各ハー
フミラー４１，４４，４６及び全反射ミラー４７から第
１の光源３１及び各他の光源３２，３３，３４の出射光
線の１／４の光線が合成された輝度及び色度の等しい合
成光線が出射される。In this light source device, one-fourth of the light emitted from the first light source 31 and the other light sources 32, 33, 34 from the half mirrors 41, 44, 46 and the total reflection mirror 47 in the third row. A combined light beam having the same luminance and chromaticity as the combined light beam is emitted.
【００４０】[0040]
【発明の効果】以上説明したように、第１の光源と、出
射光軸が第１の光源の出射光軸に直交するｎ個の他の光
源と、各他の光源の出射光軸上の第１の光源からの距離
に対応して各他の光源から離れた位置に配置され、当該
他の光源の出射光線を直角方向に全反射するｎ個の全反
射ミラーと、第１の光源の出射光軸又は各全反射ミラー
の反射光軸と各他の光源の出射光軸との交点に配置さ
れ、入射光の一部分を直角方向に反射するとともに入射
光の他の一部分を透過させるΣｎ個のハーフミラーとを
備えることにより、第１の光源及び各他の光源から出射
される光線をそれぞれ均等に分光して、合成した複数の
出射光線を得ることができ、輝度及び色度が等しい複数
の平行な出射光を得ることかできる。As described above, the first light source, n other light sources whose emission optical axes are orthogonal to the emission light axis of the first light source, and the other light sources on the emission light axes of the other light sources N total reflection mirrors arranged at positions distant from each other light source corresponding to the distance from the first light source and totally reflecting the emitted light of the other light source in a direction perpendicular to the first light source; At the intersection of the outgoing optical axis or the reflected optical axis of each total reflection mirror and the outgoing optical axis of each of the other light sources, it reflects a part of the incident light in a right angle direction and transmits another part of the incident light. Of the first light source and each of the other light sources, it is possible to obtain a plurality of combined outgoing light beams, and to obtain a plurality of outgoing light beams having the same luminance and chromaticity. Can be obtained.
【図１】本発明の一実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment of the present invention.
【図２】本発明の他の実施例の構成図である。FIG. 2 is a configuration diagram of another embodiment of the present invention.
【図３】本発明の又他の実施例の構成図である。FIG. 3 is a configuration diagram of still another embodiment of the present invention.
１，１１，３１ 第１の光源 ２，１２，１３，３２，３３，３４ 他の光源 ５，１７，１８，２０，３９〜４１，４３，４４，４６
ハーフミラー ６，１９，２１，４２，４５，４７ 全反射ミラー1,11,31 First light source 2,12,13,32,33,34 Other light source 5,17,18,20,39-41,43,44,46
Half mirror 6,19,21,42,45,47 Total reflection mirror
Claims (1)
出射光軸に交差するｎ個の他の光源と、各他の光源の出
射光軸上の第１の光源からの距離に対応して各他の光源
から離れた位置に配置され、当該他の光源の出射光線を
全反射するｎ個の全反射ミラーと、第１の光源の出射光
軸又は各全反射ミラーの反射光軸と各他の光源の出射光
軸との交点に配置され、入射光の一部分を反射するとと
もに入射光の他の一部分を透過させるΣｎ個のハーフミ
ラーとを備えることを特徴とする光源装置。1. A first light source, n other light sources whose emission optical axis intersects with the emission optical axis of the first light source, and a first light source on the emission optical axis of each other light source. N total reflection mirrors that are arranged at positions distant from each other light source corresponding to the distance and totally reflect the emitted light of the other light source, and the emission optical axis of the first light source or the total reflection mirror A light source comprising: Δn half mirrors disposed at the intersection of the reflected optical axis and the outgoing optical axis of each of the other light sources and reflecting a part of the incident light and transmitting another part of the incident light apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01961893A JP3272078B2 (en) | 1993-01-11 | 1993-01-11 | Light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01961893A JP3272078B2 (en) | 1993-01-11 | 1993-01-11 | Light source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06208080A JPH06208080A (en) | 1994-07-26 |
| JP3272078B2 true JP3272078B2 (en) | 2002-04-08 |
Family
ID=12004181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01961893A Expired - Lifetime JP3272078B2 (en) | 1993-01-11 | 1993-01-11 | Light source device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3272078B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09211724A (en) * | 1996-02-06 | 1997-08-15 | Nec Corp | Projection type liquid crystal display device |
| EP0857986B1 (en) | 1996-08-20 | 2006-03-08 | Seiko Epson Corporation | Optical device, polarized light illuminating apparatus and projection-type display |
| JP4514440B2 (en) * | 2003-12-01 | 2010-07-28 | 三洋電機株式会社 | Projection display device |
| JP2007163619A (en) * | 2005-12-12 | 2007-06-28 | Hitachi Ltd | Illumination optical section, projection display apparatus using the same, and video display method |
| JP4946279B2 (en) * | 2006-09-04 | 2012-06-06 | 株式会社Ｊｖｃケンウッド | Illumination device and image display device |
| JP2008145735A (en) * | 2006-12-11 | 2008-06-26 | Mitsubishi Electric Corp | Multivision system, video display device, and video display method |
| JP5156338B2 (en) * | 2007-06-27 | 2013-03-06 | 三洋電機株式会社 | LIGHTING DEVICE AND PROJECTION VIDEO DISPLAY DEVICE USING THE SAME |
| WO2009150586A1 (en) * | 2008-06-10 | 2009-12-17 | Koninklijke Philips Electronics N.V. | Light output device and method |
-
1993
- 1993-01-11 JP JP01961893A patent/JP3272078B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06208080A (en) | 1994-07-26 |
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