JPH0540223A - Lighting device - Google Patents
Lighting deviceInfo
- Publication number
- JPH0540223A JPH0540223A JP3222133A JP22213391A JPH0540223A JP H0540223 A JPH0540223 A JP H0540223A JP 3222133 A JP3222133 A JP 3222133A JP 22213391 A JP22213391 A JP 22213391A JP H0540223 A JPH0540223 A JP H0540223A
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- focal point
- condenser lens
- ellipsoidal mirror
- light
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は照明装置に関し、特に楕
円面鏡やその前方に配置する凹面鏡やフレネルミラー等
の形状及び光源手段との配置関係を適切に設定すること
により、光源手段からの光束の有効利用を図り効率の良
い照明を行ない、スライド等の被投影画像をスクリーン
面上に拡大投影するようにした例えば液晶プロジェクタ
ーやマイクロリーダやマイクロリーダプリンター、そし
てオーバーヘッドプロジェクタ等の投影光学系に好適な
照明装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device, and more particularly, to a device for illuminating an ellipsoidal mirror or a concave mirror or Fresnel mirror disposed in front of the illuminating device by appropriately setting the shape and the positional relationship with the light source. For projecting optical systems such as liquid crystal projectors, micro-readers, micro-reader printers, and overhead projectors, which make effective use of luminous flux and perform efficient illumination, and project images to be projected such as slides on the screen in an enlarged manner. The present invention relates to a suitable lighting device.
【０００２】[0002]
【従来の技術】従来より例えば液晶プロジェクターやマ
イクロリーダやマイクロリーダプリンター、そしてオー
バーヘッドプロジェクタ等の投影光学系に用いられる照
明装置では光源手段と、該光源手段から放射した光束を
反射させる凹面鏡や楕円面鏡、そして集光レンズ等を適
切に組み合わせて構成している。2. Description of the Related Art Conventionally, in an illuminating device used in a projection optical system such as a liquid crystal projector, a micro reader, a micro reader printer, and an overhead projector, a light source means and a concave mirror or an elliptic surface for reflecting a light beam emitted from the light source means. It is configured by appropriately combining a mirror and a condenser lens.
【０００３】図９（Ａ）、（Ｂ）、（Ｃ）は各々従来の
照明装置の要部概略図である。9 (A), 9 (B) and 9 (C) are schematic views of a main part of a conventional lighting device.
【０００４】図９（Ａ）において楕円面鏡より成るリフ
レクター９２の第１焦点近傍に配置した光源手段９１か
ら放射した光束は、該リフレクター９２で反射し、該リ
フレクター９２の第２焦点９３近傍に集光した後、発散
してコンデンサーレンズ９４に入射している。そしてコ
ンデンサーレンズ９４で集光し所定面を照明している。In FIG. 9A, the luminous flux emitted from the light source means 91 arranged near the first focal point of the reflector 92 formed of an ellipsoidal mirror is reflected by the reflector 92 and is near the second focal point 93 of the reflector 92. After being condensed, it diverges and enters the condenser lens 94. The condenser lens 94 collects the light and illuminates a predetermined surface.
【０００５】図９（Ｂ）ではリフレクター９２からの集
光性の反射光束を集光する前に発散性レンズ９５を介し
て略平行光束として所定面上を照明している。In FIG. 9B, before condensing the converging reflected light beam from the reflector 92, it illuminates a predetermined surface as a substantially parallel light beam through the divergent lens 95.
【０００６】図９（Ｃ）では光源手段９１を放物面鏡よ
り成るリフレクター９２の第１焦点からずらして配置し
ている。そして光源手段９１からの光束がリフレクター
９２で反射した後、略平行光束となるようにして、所定
面上を照明している。In FIG. 9C, the light source means 91 is arranged so as to be displaced from the first focus of the reflector 92 which is a parabolic mirror. Then, after the light flux from the light source means 91 is reflected by the reflector 92, it becomes a substantially parallel light flux to illuminate a predetermined surface.
【０００７】[0007]
【発明が解決しようとする課題】図９（Ａ）、（Ｂ）、
（Ｃ）に示す各照明装置では光源手段９１から放射した
光束のうち一部分のみが被照明体（フィルムや液晶ライ
トバルブ）に導光され、それ以外の光束は使用されな
い。Problems to be Solved by the Invention FIGS. 9 (A), 9 (B),
In each of the illumination devices shown in (C), only a part of the luminous flux emitted from the light source means 91 is guided to the illuminated body (film or liquid crystal light valve), and the other luminous flux is not used.
【０００８】例えば図中角度βで示す立体角に放射され
る光束は被照明体には入射しなく、光源手段からの光束
の利用効率が悪かった。For example, the luminous flux emitted at the solid angle indicated by the angle β in the figure does not enter the illuminated object, and the utilization efficiency of the luminous flux from the light source means is poor.
【０００９】この為、被照明体の照度が低下し、良好な
る明るさの投影像が得られないという問題点があった。Therefore, there is a problem that the illuminance of the object to be illuminated is reduced and a projected image with good brightness cannot be obtained.
【００１０】本発明は楕円面鏡や凹面鏡、そして集光レ
ンズ等の光学要素の形状及び光学配置を適切に設定する
ことにより、光源手段からの光束の有効利用を図り、被
照明体を高い照度で照明することができる照明装置の提
供を目的とする。According to the present invention, by appropriately setting the shapes and optical arrangements of optical elements such as an ellipsoidal mirror, a concave mirror, and a condenser lens, the luminous flux from the light source means can be effectively used and the illuminated object can be illuminated with high illuminance. An object of the present invention is to provide a lighting device that can be illuminated by.
【００１１】[0011]
【課題を解決するための手段】本発明の照明装置は楕円
面鏡の第１焦点近傍に光源手段を設け、該楕円面鏡の前
方に該楕円面鏡の焦点間距離と略等しい曲率半径の凹面
鏡をその曲率半径が該楕円面鏡の第１焦点に略一致する
ように配置し、該楕円面鏡の第２焦点に相当する該凹面
鏡の一部に開口部を設けると共に該開口部の前方に集光
レンズを配置し、該光源手段からの光束のうち該楕円面
鏡で反射し該第２焦点に集光した光束及び該凹面鏡で反
射した後、該楕円面鏡で反射し該第２焦点に集光した光
束を該凹面鏡の開口部を介して該集光レンズに入射させ
該集光レンズで集光して所定面上を照明するようにした
ことを特徴としている。In the illuminating device of the present invention, light source means is provided in the vicinity of the first focal point of the ellipsoidal mirror and has a radius of curvature substantially equal to the inter-focal distance of the elliptic mirror in front of the ellipsoidal mirror. The concave mirror is arranged so that its radius of curvature substantially matches the first focal point of the ellipsoidal mirror, and an opening is provided in a part of the concave mirror corresponding to the second focal point of the ellipsoidal mirror and the front of the opening is provided. A condenser lens is disposed on the second focal point, and the light flux from the light source means is reflected by the ellipsoidal mirror, condensed at the second focal point and reflected by the concave mirror, and then reflected by the elliptical mirror. It is characterized in that a light flux condensed at a focal point is made incident on the condenser lens through the opening of the concave mirror and condensed by the condenser lens to illuminate a predetermined surface.
【００１２】この他本発明では楕円面鏡の第１焦点近傍
に光源手段を設け、該楕円面鏡の前方に該楕円面鏡の該
第１焦点に法線が通過するように複数の反射面を設けた
フレネルミラーを配置し、該楕円面鏡の第２焦点に相当
する該フレネルミラーの一部に開口部を設けると共に該
開口部の前方に集光レンズを配置し、該光源手段からの
光束のうち該楕円面鏡で反射し該第２焦点に集光した光
束及び該フレネルミラーで反射した後、楕円面鏡で反射
し該第２焦点に集光した光束を該フレネルミラーの開口
部を介して該集光レンズに入射させ該集光レンズで集光
して所定面上を照明するようにしたことを特徴としてい
る。In addition, in the present invention, the light source means is provided in the vicinity of the first focus of the ellipsoidal mirror, and a plurality of reflecting surfaces are provided in front of the ellipsoidal mirror so that a normal line passes through the first focus of the ellipsoidal mirror. Is provided, and an opening is provided in a part of the Fresnel mirror corresponding to the second focal point of the ellipsoidal mirror, and a condenser lens is provided in front of the opening, and Of the light flux, the light flux reflected by the ellipsoidal mirror and focused on the second focus and the light flux reflected by the Fresnel mirror and then reflected by the ellipsoidal mirror and focused on the second focus are opened in the Fresnel mirror. It is characterized in that the light is made incident on the condenser lens through the light and is condensed by the condenser lens to illuminate a predetermined surface.
【００１３】[0013]
【実施例】図１は本発明の実施例１の要部概略図、図２
は図１の一方から見たときの概略図、図３は図１の光路
を説明する為の概略図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view of the essential portions of a first embodiment of the present invention, FIG.
1 is a schematic diagram when viewed from one side of FIG. 1, and FIG. 3 is a schematic diagram for explaining the optical path of FIG.
【００１４】図中、１は楕円面鏡であり、１ａはその第
１焦点、１ｂはその第２焦点である。In the figure, 1 is an ellipsoidal mirror, 1a is its first focal point, and 1b is its second focal point.
【００１５】２は凹面鏡であり、楕円面鏡１の前方に設
けており、楕円面鏡１の第１焦点１ａから第２焦点１ｂ
までの距離と略等しい値の曲率半径を有している。Reference numeral 2 denotes a concave mirror, which is provided in front of the ellipsoidal mirror 1 and has a first focus 1a to a second focus 1b of the ellipsoidal mirror 1.
The radius of curvature is approximately equal to the distance to.
【００１６】凹面鏡２はその曲率中心が楕円面鏡１の第
１焦点１ａに略一致するように配置している。凹面鏡２
のうち楕円面鏡１の第２焦点１ｂの位置に相当する領
域、即ち凹面鏡２の光軸７に相当する領域に円形状又は
四角形状等の開口部４を設けている。５は支柱であり楕
円面鏡１と凹面鏡２とを相互に支持している。The concave mirror 2 is arranged so that its center of curvature is substantially coincident with the first focal point 1a of the ellipsoidal mirror 1. Concave mirror 2
A circular or quadrangular opening 4 is provided in a region corresponding to the position of the second focal point 1b of the ellipsoidal mirror 1, that is, a region corresponding to the optical axis 7 of the concave mirror 2. A column 5 supports the ellipsoidal mirror 1 and the concave mirror 2 to each other.
【００１７】３は光源手段であり、例えばメタルハライ
ドランプやハロゲンランプ等から成り、楕円面鏡１の第
１焦点１ａ近傍に配置している。Reference numeral 3 denotes a light source means, which is composed of, for example, a metal halide lamp, a halogen lamp or the like, and is arranged near the first focal point 1a of the ellipsoidal mirror 1.
【００１８】６は集光レンズであり、凹面鏡２の開口部
４の前方に配置している。A condenser lens 6 is disposed in front of the opening 4 of the concave mirror 2.
【００１９】本実施例では光源手段１からの光束のうち
楕円面鏡１に入射し反射した光束は第２焦点１ｂに集光
している。又、光源手段１からの光束のうち凹面鏡２に
入射し反射した光束は元の光路を戻り、楕円面鏡１で反
射し、第２焦点１ｂに集光している。そして第２焦点１
ｂに集光したこれらの光束は凹面鏡２の開口部４を通過
し、集光レンズ６で略平行光束とし被照明体（不図示）
に導光し、照明している。In this embodiment, of the light flux from the light source means 1, the light flux which is incident on and reflected by the ellipsoidal mirror 1 is focused on the second focal point 1b. Further, of the light flux from the light source means 1, the light flux which is incident on and reflected by the concave mirror 2 returns to the original optical path, is reflected by the ellipsoidal mirror 1, and is focused on the second focal point 1b. And the second focus 1
These light beams condensed on b pass through the opening 4 of the concave mirror 2 and are converted into substantially parallel light beams by the condenser lens 6 to be illuminated (not shown).
The light is guided to and illuminated.
【００２０】このように本実施例では光源手段３からの
光束のうち楕円面鏡１に直接入射しない従来の照明装置
では不使用の光束を凹面鏡２で反射し、楕円面鏡１に戻
し、集光レンズ６に入射させて照明用として用いてい
る。これにより光源手段３からの光束の有効利用を図っ
ている。As described above, in the present embodiment, among the light fluxes from the light source means 3, unused light fluxes in the conventional illumination device which do not directly enter the ellipsoidal mirror 1 are reflected by the concave mirror 2 and returned to the ellipsoidal mirror 1. It is incident on the optical lens 6 and used for illumination. Thereby, the luminous flux from the light source means 3 is effectively used.
【００２１】本実施例において凹面鏡２の開口部４より
射出する光束の射出角θは楕円面鏡１や凹面鏡２の形状
及び配置等を適切に設定することにより種々と制御して
いる。In this embodiment, the exit angle θ of the light beam emitted from the opening 4 of the concave mirror 2 is variously controlled by appropriately setting the shapes and arrangements of the ellipsoidal mirror 1 and the concave mirror 2.
【００２２】例えば、楕円面鏡１の端面を結ぶ平面と光
軸７との交点Ｔ１が第１焦点１ａ側に位置するように楕
円面鏡１の形状を設定すれば射出角θは小さくなる。逆
に交点Ｔ１が第２焦点１ｂ側に位置するように設定すれ
ば射出角θは大きくなる。For example, if the shape of the ellipsoidal mirror 1 is set so that the intersection T1 of the plane connecting the end faces of the ellipsoidal mirror 1 and the optical axis 7 is located on the first focal point 1a side, the exit angle θ becomes small. On the contrary, if the intersection T1 is set to be located on the side of the second focal point 1b, the emission angle θ becomes large.
【００２３】本実施例において凹面鏡２の端面を結ぶ平
面Ｓ１と光軸７との交点Ｔ２が楕円面鏡１の第１焦点１
ａより後方（図中左側）にあると光源手段３からの光束
が楕円面鏡１と凹面鏡２との間の空間内に閉じ込められ
て熱が発生してくる場合がある。そこで本実施例では交
点Ｔ２が第１焦点１ａより前方（図中右側）に位置する
ように楕円面鏡１と凹面鏡２の形状を設定し、空気の流
通を良くし、熱の発生を防止している。In this embodiment, the intersection T2 between the plane S1 connecting the end faces of the concave mirror 2 and the optical axis 7 is the first focal point 1 of the ellipsoidal mirror 1.
If it is located behind a (on the left side in the drawing), the light flux from the light source means 3 may be trapped in the space between the ellipsoidal mirror 1 and the concave mirror 2 to generate heat. Therefore, in this embodiment, the shapes of the ellipsoidal mirror 1 and the concave mirror 2 are set so that the intersection T2 is located in front of the first focal point 1a (on the right side in the drawing) to improve the air circulation and prevent the generation of heat. ing.
【００２４】尚、本実施例において熱の発生を防止する
為に楕円面鏡１と凹面鏡の反射面をコールドミラーより
構成しても良い。In this embodiment, the ellipsoidal mirror 1 and the reflecting surfaces of the concave mirror may be constituted by cold mirrors in order to prevent heat generation.
【００２５】図４、図５、図６は各々本発明の実施例
２、３、４の要部概略図である。FIGS. 4, 5 and 6 are schematic views of the essential portions of Embodiments 2, 3 and 4 of the present invention.
【００２６】図中、図１の実施例１で示した要素と同一
要素には同符番を付している。In the figure, the same elements as those shown in the first embodiment of FIG. 1 are designated by the same reference numerals.
【００２７】図４の実施例２では楕円面鏡１と凹面鏡２
との形状を光軸７ａに対して非対称としている。そして
楕円面鏡１と凹面鏡２の光軸７ａに対して集光レンズ６
の光軸７ｂとが角度αで交叉するように構成している。
これにより実施例１と同様の効果を得ている。In the second embodiment shown in FIG. 4, the ellipsoidal mirror 1 and the concave mirror 2 are used.
And are asymmetric with respect to the optical axis 7a. Then, with respect to the optical axes 7a of the ellipsoidal mirror 1 and the concave mirror 2, the condenser lens 6
The optical axis 7b is crossed at an angle α.
As a result, the same effect as that of the first embodiment is obtained.
【００２８】図５の実施例３では楕円面鏡１の前方に第
１凹面鏡２ａと第２凹面鏡２ｂの２つの凹面鏡を設けて
いる。In the third embodiment of FIG. 5, two concave mirrors, a first concave mirror 2a and a second concave mirror 2b, are provided in front of the ellipsoidal mirror 1.
【００２９】第１凹面鏡２ａは第１焦点１ａに曲率中心
を有する曲率半径Ｒ２ａの凹面鏡より成っている。The first concave mirror 2a comprises a concave mirror having a radius of curvature R2a having a center of curvature at the first focal point 1a.
【００３０】第２凹面鏡２ｂは第１焦点１ａに曲率中心
を有する曲率半径Ｒ２ｂの凹面鏡より成っている。The second concave mirror 2b is composed of a concave mirror having a radius of curvature R2b having a center of curvature at the first focal point 1a.
【００３１】第２凹面鏡２ｂの曲率半径Ｒ２ｂは第１焦
点１ａから第２焦点１ｂまでの距離と略等しくなってい
る。The radius of curvature R2b of the second concave mirror 2b is substantially equal to the distance from the first focal point 1a to the second focal point 1b.
【００３２】第１凹面鏡２ａの開口形状は光源手段３か
らの光束のうち楕円面鏡１で反射し第２焦点１ｂに入射
する光束を遮光しないように設定している。The aperture shape of the first concave mirror 2a is set so that the light flux from the light source means 3 which is reflected by the ellipsoidal mirror 1 and enters the second focal point 1b is not blocked.
【００３３】本実施例では光源手段３からの光束のうち
第１凹面鏡２ａ（第２凹面鏡２ｂ）に入射した光束を反
射させ元の光路に戻し、楕円面鏡１で反射させて第２焦
点１ｂに集光している。そして集光レンズ（不図示）に
入射させている。In the present embodiment, of the light flux from the light source means 3, the light flux incident on the first concave mirror 2a (second concave mirror 2b) is reflected back to the original optical path, reflected by the ellipsoidal mirror 1 and then reflected by the second focal point 1b. It is focused on. Then, it is incident on a condenser lens (not shown).
【００３４】本実施例では２つの凹面鏡２ａ、２ｂを用
いることにより外径寸法を縮少化し、装置全体の小型化
を図っている。In this embodiment, the two concave mirrors 2a and 2b are used to reduce the outer diameter dimension and to downsize the entire apparatus.
【００３５】図６の実施例４では図１の実施例１の凹面
鏡２の代わりに球形状のフレネルミラー６１を用いてい
る点が異なり、その他の構成は同じである。The fourth embodiment of FIG. 6 is different in that a spherical Fresnel mirror 61 is used instead of the concave mirror 2 of the first embodiment of FIG. 1, and the other structures are the same.
【００３６】図６に示すようにフレネルミラー６１で光
源手段３からの光束を反射し、元の光路に戻し、楕円面
鏡１で反射し第２焦点１ｂに集光している。そして集光
レンズ６に入射させている。As shown in FIG. 6, the light flux from the light source means 3 is reflected by the Fresnel mirror 61, returned to the original optical path, reflected by the ellipsoidal mirror 1 and condensed at the second focal point 1b. Then, it is incident on the condenser lens 6.
【００３７】図７は図６のフレネルミラー６１の光軸７
を含む平面の断面図である。フレネルミラー６１の複数
の反射面６１ａはその法線が第１焦点１ａを通過するよ
うに設定している。又、反射面６１ａの長さ６１Ｌは光
源手段３の発光面径と略一致させている。反射面６１ａ
の長さ６１Ｌが光源手段３の発光面径より大きくなると
反射面６１ａで反射した後、光源手段３に戻る光束が少
なくなり、光束が楕円面鏡１とフレネルミラー６１との
空間内に閉じ込められ光束の利用効率が低下してくるの
で良くない。FIG. 7 shows the optical axis 7 of the Fresnel mirror 61 of FIG.
It is sectional drawing of the plane containing. The plurality of reflecting surfaces 61a of the Fresnel mirror 61 are set so that their normals pass through the first focal point 1a. Further, the length 61L of the reflecting surface 61a is made substantially equal to the light emitting surface diameter of the light source means 3. Reflective surface 61a
When the length 61L is larger than the light emitting surface diameter of the light source means 3, the light flux returning to the light source means 3 after being reflected by the reflecting surface 61a is reduced, and the light flux is confined in the space between the ellipsoidal mirror 1 and the Fresnel mirror 61. This is not good because the utilization efficiency of the light flux decreases.
【００３８】尚、本実施例においてフレネルミラーを図
８に示すように反射面６１ｂを光源手段３（第１焦点１
ａ）を中心とする同心円反射面（曲率半径Ｒ１、Ｒ２・
・・）の一部より構成しても良い。In this embodiment, the Fresnel mirror is provided with the reflecting surface 61b on the light source means 3 (first focus 1) as shown in FIG.
a) a concentric reflecting surface centered on (a) (radius of curvature R1, R2.
・ ・) May be configured as a part.
【００３９】また、集光レンズ６を通過した後の光束断
面形状が略画像表示デバイスの形状と一致するように、
各々、楕円面鏡、凹面鏡、フレネルミラーの形状を設定
してもよい。Further, in order that the cross-sectional shape of the light flux after passing through the condenser lens 6 substantially matches the shape of the image display device,
You may set the shape of an ellipsoidal mirror, a concave mirror, and a Fresnel mirror, respectively.
【００４０】[0040]
【発明の効果】本発明によれば以上のように楕円面鏡や
凹面鏡、そして集光レンズ等の光学要素の形状及び光学
配置を適切に設定することにより、光源手段からの光束
の有効利用を図り、被照明体を高い照度で照明すること
ができる照明装置を達成することができる。As described above, according to the present invention, the shape and the optical arrangement of the optical elements such as the ellipsoidal mirror, the concave mirror, and the condenser lens are appropriately set to effectively use the light flux from the light source means. Therefore, it is possible to achieve an illuminating device capable of illuminating an object to be illuminated with high illuminance.
【図１】本発明の実施例１の要部概略図FIG. 1 is a schematic view of a main part of a first embodiment of the present invention.
【図２】図１の一方から見たときの概略図FIG. 2 is a schematic diagram when viewed from one side of FIG.
【図３】図１の光路の説明図FIG. 3 is an explanatory diagram of an optical path in FIG.
【図４】本発明の実施例２の要部概略図FIG. 4 is a schematic view of the essential portions of Embodiment 2 of the present invention.
【図５】本発明の実施例３の要部概略図FIG. 5 is a schematic view of the essential portions of Embodiment 3 of the present invention.
【図６】本発明の実施例４の要部概略図FIG. 6 is a schematic view of the essential portions of Embodiment 4 of the present invention.
【図７】図６の光軸を含む断面概略図7 is a schematic cross-sectional view including the optical axis of FIG.
【図８】図６のフレネルミラーの他の実施例の説明図8 is an explanatory view of another embodiment of the Fresnel mirror shown in FIG.
【図９】従来の照明装置の概略図FIG. 9 is a schematic view of a conventional lighting device.
１ 楕円面鏡 ２、２ａ、２ｂ 凹面鏡 ３ 光源手段 ４ 開口部 ５ 支柱 ６ 集光レンズ ７、７ａ、７ｂ 光軸 ６１ フレネルミラー １ａ 第１焦点 １ｂ 第２焦点 1 Ellipsoidal Mirror 2, 2a, 2b Concave Mirror 3 Light Source Means 4 Aperture 5 Support 6 Condensing Lens 7, 7a, 7b Optical Axis 61 Fresnel Mirror 1a First Focus 1b Second Focus
Claims (2)
け、該楕円面鏡の前方に該楕円面鏡の焦点間距離と略等
しい曲率半径の凹面鏡をその曲率半径が該楕円面鏡の第
１焦点に略一致するように配置し、該楕円面鏡の第２焦
点に相当する該凹面鏡の一部に開口部を設けると共に該
開口部の前方に集光レンズを配置し、該光源手段からの
光束のうち該楕円面鏡で反射し該第２焦点に集光した光
束及び該凹面鏡で反射した後、該楕円面鏡で反射し該第
２焦点に集光した光束を該凹面鏡の開口部を介して該集
光レンズに入射させ該集光レンズで集光して所定面上を
照明するようにしたことを特徴とする照明装置。1. A light source means is provided in the vicinity of a first focal point of an ellipsoidal mirror, and a concave mirror having a radius of curvature substantially equal to an interfocal distance of the ellipsoidal mirror is provided in front of the ellipsoidal mirror. Of the concave mirror corresponding to the second focal point of the ellipsoidal mirror, and a condenser lens is disposed in front of the aperture. Of the light flux from the means, the light flux reflected by the ellipsoidal mirror and focused on the second focus and the light flux reflected by the concave mirror and then reflected by the ellipsoidal mirror and focused on the second focus by the concave mirror An illuminating device characterized in that the light is incident on the condenser lens through an opening and is condensed by the condenser lens to illuminate a predetermined surface.
け、該楕円面鏡の前方に該楕円面鏡の該第１焦点に法線
が通過するように複数の反射面を設けたフレネルミラー
を配置し、該楕円面鏡の第２焦点に相当する該フレネル
ミラーの一部に開口部を設けると共に該開口部の前方に
集光レンズを配置し、該光源手段からの光束のうち該楕
円面鏡で反射し該第２焦点に集光した光束及び該フレネ
ルミラーで反射した後、該楕円面鏡で反射し該第２焦点
に集光した光束を該フレネルミラーの開口部を介して該
集光レンズに入射させ該集光レンズで集光して所定面上
を照明するようにしたことを特徴とする照明装置。2. A light source means is provided in the vicinity of a first focus of the ellipsoidal mirror, and a plurality of reflecting surfaces are provided in front of the ellipsoidal mirror so that a normal line passes through the first focus of the ellipsoidal mirror. A Fresnel mirror is arranged, an opening is provided in a part of the Fresnel mirror corresponding to the second focal point of the ellipsoidal mirror, and a condenser lens is arranged in front of the opening. The light flux reflected by the ellipsoidal mirror and condensed at the second focus and the light flux reflected by the Fresnel mirror and then reflected by the ellipsoidal mirror and condensed at the second focus are passed through the opening of the Fresnel mirror. The illuminating device is characterized in that the light is incident on the condenser lens and is condensed by the condenser lens to illuminate a predetermined surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3222133A JPH0540223A (en) | 1991-08-07 | 1991-08-07 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3222133A JPH0540223A (en) | 1991-08-07 | 1991-08-07 | Lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0540223A true JPH0540223A (en) | 1993-02-19 |
Family
ID=16777690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3222133A Pending JPH0540223A (en) | 1991-08-07 | 1991-08-07 | Lighting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0540223A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6022123A (en) * | 1996-08-06 | 2000-02-08 | Olympus Optical Co., Ltd. | Light source device |
| JP2003523527A (en) * | 1999-10-13 | 2003-08-05 | フュージョン ライティング， インコーポレイテッド | Lamp apparatus and method for effectively using light from an aperture lamp |
| WO2004092823A1 (en) * | 2003-04-18 | 2004-10-28 | Matsushita Electric Industrial Co., Ltd. | Light source unit, illuminator and projection display |
| US7385212B2 (en) | 2003-07-14 | 2008-06-10 | Nikon Corporation | Collector optical system, light source unit, illumination optical apparatus, and exposure apparatus |
| JP2009032449A (en) * | 2007-07-25 | 2009-02-12 | Panasonic Electric Works Co Ltd | Light source unit and spotlight having the same |
| JP2013012358A (en) * | 2011-06-28 | 2013-01-17 | Sharp Corp | Lighting device, and vehicular headlamp |
| WO2016131069A3 (en) * | 2015-12-11 | 2016-10-06 | Johnson Kenneth Carlisle | Euv light source with spectral purity filter and power recycling |
-
1991
- 1991-08-07 JP JP3222133A patent/JPH0540223A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6022123A (en) * | 1996-08-06 | 2000-02-08 | Olympus Optical Co., Ltd. | Light source device |
| JP2003523527A (en) * | 1999-10-13 | 2003-08-05 | フュージョン ライティング， インコーポレイテッド | Lamp apparatus and method for effectively using light from an aperture lamp |
| WO2004092823A1 (en) * | 2003-04-18 | 2004-10-28 | Matsushita Electric Industrial Co., Ltd. | Light source unit, illuminator and projection display |
| US7213944B2 (en) | 2003-04-18 | 2007-05-08 | Matsushita Electric Industrial Co., Ltd. | Light source apparatus, lighting apparatus and projection display apparatus |
| JP2009020537A (en) * | 2003-04-18 | 2009-01-29 | Panasonic Corp | Light source unit, illuminator and projection display |
| US7385212B2 (en) | 2003-07-14 | 2008-06-10 | Nikon Corporation | Collector optical system, light source unit, illumination optical apparatus, and exposure apparatus |
| JP2009032449A (en) * | 2007-07-25 | 2009-02-12 | Panasonic Electric Works Co Ltd | Light source unit and spotlight having the same |
| JP2013012358A (en) * | 2011-06-28 | 2013-01-17 | Sharp Corp | Lighting device, and vehicular headlamp |
| WO2016131069A3 (en) * | 2015-12-11 | 2016-10-06 | Johnson Kenneth Carlisle | Euv light source with spectral purity filter and power recycling |
| US9612370B1 (en) | 2015-12-11 | 2017-04-04 | Kenneth C. Johnson | EUV light source with spectral purity filter and power recycling |
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