JPS60242408A - Optical system of light source for light guide - Google Patents

Optical system of light source for light guide

Info

Publication number
JPS60242408A
JPS60242408A JP9897484A JP9897484A JPS60242408A JP S60242408 A JPS60242408 A JP S60242408A JP 9897484 A JP9897484 A JP 9897484A JP 9897484 A JP9897484 A JP 9897484A JP S60242408 A JPS60242408 A JP S60242408A
Authority
JP
Japan
Prior art keywords
optical system
light source
light
light guide
concave lens
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
Application number
JP9897484A
Other languages
Japanese (ja)
Inventor
Masatoshi Yonekubo
政敏 米窪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP9897484A priority Critical patent/JPS60242408A/en
Publication of JPS60242408A publication Critical patent/JPS60242408A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE:To obtain a compact optical system of a light source for a light guide which has high efficiency without uneven quantity of light by providing an averaging optical system consisting of a diffusion face, concave lens and circular cylindrical-faced reflecting mirror. CONSTITUTION:A spot light source 101 is a halogen lamp. A concave mirror 301 and a condenser lens 302 are used as a condensing optical system and an IR cut filter 103 is provided. The diffusion face 303 and the concave lens 304 are installed near the condensing face by the condensing optical system of the source 10 and the circular cylindrical-faced reflecting mirror 305 is installed behind the same by matching the central axis of the cirlcular cylinder and the optical axis. A light guide incident part 105 bundled with optical fibers 106 is disposed. The diffusion plate 303 may diffuse the light weakly to the extent that the image of the filaments by the condensing optical system does not appear sharply. The function to provide inclination to rays is provided by the lens 304 and therefore the efficiency of utilizing the luminous flux is high.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は、ライトガイド用光源光学系、より詳しくはＩ
Ｊｆ１本のプラスチック光ファイノ（−ヲ用１．−たラ
イトガイド川の光源光学系に関する。[Detailed Description of the Invention] [Technical Field] The present invention relates to a light source optical system for a light guide, more specifically, an I
Jf 1 plastic optical fiber (1.- for use with light guide) Concerning the light source optical system of the river.

〔在米技術〕[US technology]

従来、複数本の光ファイノ＜−ｗｒｌ＝１だライトガイ
ド用光源光学系としては、第１図に示てごと（、点光源
１０１より発せられた光未乞集光光学系１０２により果
光し、赤外線除去機能を有するフィルター１Ｏ３（以下
赤外カットフィルター）により冷光とし、拡散板１０４
により光束乞平均化して光フアイバー入射口１０５乞照
明するタイ７“、ある（１ヲま第２図に示すごとく拡散
板１０４の後方にさらに光束平均化のための円柱面反射
鏡２ｏ１ｙｔ設けたタイプが知られている。Conventionally, as a light source optical system for a light guide with multiple optical fins <-wrl=1, as shown in FIG. , a cold light is produced by a filter 1O3 having an infrared ray removal function (hereinafter referred to as an infrared cut filter), and a diffuser plate 104
There is a tie 7" that averages the luminous flux and illuminates the optical fiber entrance 105. (1) As shown in FIG. It has been known.

第１図のタイプでは各党ファイバーに入射する光を十分
に平均化しようとでると、拡散性か大きな拡散板ン使用
する必侠かある。これは、光ファイバーの開口角内にお
いて等輝度に光乞拡散しようとしたとき、拡散板乞使用
したのでは開口角外にも光を拡散１−なければならない
ということであり、光束利用効率が低下するという問題
がある。In the type shown in Figure 1, if the light incident on each fiber is to be sufficiently averaged, it is necessary to use a diffuser or a large diffuser plate. This means that when trying to diffuse light with equal brightness within the aperture angle of an optical fiber, if a diffuser plate is used, the light must also be diffused outside the aperture angle, which reduces the luminous flux utilization efficiency. There is a problem with doing so.

また、円柱面反射鏡２０１を有する第２図のタイプは円
柱の長さ乞長くてると、各党ファイバーに入射てる光は
十分に平均化することか可能であるが、多くのスペース
を必要とする問題点があった。In addition, in the type shown in Fig. 2 which has a cylindrical reflector 201, if the length of the cylinder is too long, it is possible to sufficiently average the light incident on each fiber, but it requires a lot of space. There was a problem.

〔目的〕〔the purpose〕

本発明はこのような問題点を解決するもので、その目的
とするところは、より高効率で、光量ムラが少なく、コ
ンパクトでさらに低コストなライトガイド用光源光学系
ヲ提供することにある。The present invention is intended to solve these problems, and its purpose is to provide a light source optical system for a light guide that is more efficient, has less unevenness in light amount, is compact, and is lower in cost.

〔概要〕 本発明のライトガイド用光源光学系は、点光源と集光光
学系と平均化光学系を有し、該平均化光学系は、拡散面
、凹レンズ、円柱面反射鏡を有し、点光源の集光光学系
による果光面近傍に、拡散面及び凹レンズ乞設置し、該
拡散面及び凹レンズの後方に円柱面反射鏡を円柱の中心
軸と光軸とを合致させて設置したことを％徴とし、さら
に醪凹レンズは単回レンズであって少なくとも一つの屈
折面か拡散機能を有し、さらに亦外鹸除去機能及び耐熱
性を有することを特徴とする。[Summary] The light source optical system for a light guide of the present invention includes a point light source, a condensing optical system, and an averaging optical system, and the averaging optical system includes a diffusing surface, a concave lens, and a cylindrical reflecting mirror. A diffusing surface and a concave lens are installed near the optical surface of the condensing optical system of the point light source, and a cylindrical reflecting mirror is installed behind the diffusing surface and concave lens with the central axis of the cylinder and the optical axis aligned. Furthermore, the concave lens is a single lens having at least one refractive surface or a diffusion function, and also has a soap removal function and heat resistance.

〔実施例〕〔Example〕

以下本発明について実施例に基づき詳細に説明てる。 The present invention will be explained in detail below based on examples.

実施例１ 第６図において、点光源１０１は１２Ｖ５０Ｗのハロゲ
ンランク、集光光学系として凹面鏡６０１とコンデンサ
ーレンズ３０２を用いている。赤外カットフィルター１
０６は赤外線反射層を有する干渉フィルターであり、７
００　ｎｍ以上は反射して透過しない。６０３は拡散板
であって白板ガラスを適度に砂ズリし拡散度は少ないも
のである。３０４は凹レンズであり焦点距離は一１００
憩である。３０５は長さ６０ｍのアクリル棒であって空
気との界面が全反射による円柱面反射鏡をなしている。Embodiment 1 In FIG. 6, a point light source 101 uses a 12V50W halogen rank, and a concave mirror 601 and a condenser lens 302 are used as a condensing optical system. Infrared cut filter 1
06 is an interference filter having an infrared reflective layer, 7
00 nm or more is reflected and not transmitted. Reference numeral 603 is a diffusion plate, which is made of a white glass plate moderately sanded and has a low degree of diffusion. 304 is a concave lens with a focal length of -100
It's a rest. Reference numeral 305 is an acrylic rod with a length of 60 m, and the interface with the air forms a cylindrical reflecting mirror due to total internal reflection.

１０５は直径１＋ｍｎの光ファイバーを３００本束ねた
ライトガイド入射部である。以上の構成において、拡散
板６０６は集光光学系によるフィラメントの像かはっき
り現われない程度の弱い拡散でよく、光線に傾きを持た
せる機能は凹レンズ３０４か果すため光束第１」用効率
が高い。Reference numeral 105 denotes a light guide entrance section in which 300 optical fibers with a diameter of 1+mm are bundled. In the above configuration, the diffusion plate 606 only needs to diffuse weakly to such an extent that the image of the filament produced by the condensing optical system does not clearly appear, and the concave lens 304 performs the function of tilting the light beam, so that the first beam efficiency is high.

実施例２ 第４図は本発明におけるライトガイド用光源光学系の実
施例２である。照光＃、１０１は１２ＶＩ　ＤＯＷのハ
ロゲンランプであり、集光光学系１０１は、多数の小さ
な平面鏡の組合せにより全体として回転万物面鏡をなし
ているものであり、フィラメント乞適当にぼかしながら
集光する機能を有する集光位置は万物面鏡より６０ｍで
ある。４０１は拡散面であって、ナシ地処理乞したプレ
ス型による型押しにより形成される。４０２は熱純吸収
ガラスであって耐熱性を有する。４０３は凹面であって
凹しンズケなしており、焦点距離は約−１５０鰭である
。２０１はアルミニウム筒よりなる円柱面反射鏡であり
長さは４０＋＋ｍである。１０５は直径０．７５ｍのプ
ラスチック光ファイバーＹ５００本束ねたライトカイト
の入射部である。以上のライトガイド用光源光学によれ
ば前記赤外カットフィルター、拡散板、凹レンズが一つ
の部品で実現でき、低コスト、省スペース、さらに境界
面の数か６面から２面になるため表面反射損失が少なく
なり１８％近（効率が上がった。最適な凹レンズの焦点
距離はフィラメント像面のムラ、拡散面の拡散度、円柱
面反射鏡の長さ、さらに、元ファイバーの開口角、元フ
ァイバーの結束精度等により異なるが本実施例における
ライトガイド出口での光フアイバ１本ごとの輝度ムラと
使用した凹レンズの焦点距離との関係乞第５図に示す。Embodiment 2 FIG. 4 shows Embodiment 2 of a light source optical system for a light guide according to the present invention. Illumination #, 101 is a 12 VI DOW halogen lamp, and the condensing optical system 101 is a rotating universal mirror formed by a combination of many small plane mirrors, and condenses the light while blurring the filament appropriately. The functional condensing position is 60 m from the omnidirectional mirror. Reference numeral 401 denotes a diffusion surface, which is formed by embossing with a press mold that has been treated with a blank surface. 402 is heat pure absorption glass and has heat resistance. 403 is a concave surface with a concave hole, and the focal length is approximately -150 degrees. 201 is a cylindrical reflecting mirror made of an aluminum tube and has a length of 40++ m. Reference numeral 105 denotes the entrance part of a light kite in which 500 plastic optical fibers Y with a diameter of 0.75 m are bundled. According to the light source optics for the light guide described above, the infrared cut filter, the diffuser plate, and the concave lens can be realized in one component, which is low cost and space-saving.Furthermore, since the number of boundary surfaces is reduced from six to two, surface reflection is achieved. Loss is reduced to nearly 18% (efficiency increased). The optimal focal length of the concave lens depends on the unevenness of the filament image plane, the degree of diffusion of the diffusing surface, the length of the cylindrical reflector, the aperture angle of the original fiber, and the original fiber. The relationship between the brightness unevenness of each optical fiber at the exit of the light guide and the focal length of the concave lens used in this embodiment is shown in FIG.

〔効果〕〔effect〕

以上−のように本発明によれば、安価で、高効率で光量
ムラか少な（、マンパクトなライトカイト用光源元学系
が実現できる。As described above, according to the present invention, it is possible to realize a light source system for a light kite that is inexpensive, highly efficient, and has little unevenness in light intensity.

第５図Figure 5

Claims (1)

【特許請求の範囲】 １）点光源と集光光学系と平均化光学系を有するライト
ガイド用光源光学系において、該平均化光学系は、拡散
面、凹レンズ、円柱面反射鏡を肩し、点光源の集光光学
系による集光面近傍に、拡散面及び凹レンズを設置し、
該拡散面及び凹レンズの後方に円柱面反射鏡を円柱の中
心軸と光軸とを合致させて設置したことを特徴とするラ
イトガイド用光源光学系。 ２）該凹レンズは単口レンズであり、少なくとも一つの
屈折面が拡散機能を有し、特許請求の範囲第１項記載の
拡散面をなすことを特徴とする特許請求の範囲第１項記
載のライトガイド用光源光学系。 ３）ｇ凹レンズは赤外線除去機能を有すること特徴とす
る特許請求の範囲第１項記載のライトガイド用光源光学
系。 ４）該凹レンズは、耐熱ガラスであることヲ特徴とする
特許請求の範囲第１項記載のライトガイド用光源光学系
。[Claims] 1) In a light source optical system for a light guide having a point light source, a condensing optical system, and an averaging optical system, the averaging optical system supports a diffusing surface, a concave lens, and a cylindrical reflecting mirror, A diffusing surface and a concave lens are installed near the condensing surface of the point light source condensing optical system,
A light source optical system for a light guide, characterized in that a cylindrical reflecting mirror is installed behind the diffusing surface and the concave lens so that the central axis of the cylinder and the optical axis coincide. 2) The concave lens is a single lens, and at least one refractive surface has a diffusing function and forms the diffusing surface as described in claim 1. Light source optical system for light guide. 3) The light source optical system for a light guide according to claim 1, wherein the concave lens has an infrared ray removal function. 4) The light source optical system for a light guide according to claim 1, wherein the concave lens is made of heat-resistant glass.
JP9897484A 1984-05-17 1984-05-17 Optical system of light source for light guide Pending JPS60242408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9897484A JPS60242408A (en) 1984-05-17 1984-05-17 Optical system of light source for light guide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9897484A JPS60242408A (en) 1984-05-17 1984-05-17 Optical system of light source for light guide

Publications (1)

Publication Number Publication Date
JPS60242408A true JPS60242408A (en) 1985-12-02

Family

ID=14234002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9897484A Pending JPS60242408A (en) 1984-05-17 1984-05-17 Optical system of light source for light guide

Country Status (1)

Country Link
JP (1) JPS60242408A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01198710A (en) * 1988-02-03 1989-08-10 Yamatake Honeywell Co Ltd Optical projecting system
US4997259A (en) * 1988-04-28 1991-03-05 Mitsubishi Rayon Co., Ltd. Light source system with uniforming device for optical fiber type lightguide
JPH0520007U (en) * 1991-08-28 1993-03-12 グローリー工業株式会社 Image sensor light emitting device
WO1996035134A1 (en) * 1995-05-02 1996-11-07 Hermann Leber Light generator for supplying optical fibres
FR2887997A1 (en) * 2005-06-30 2007-01-05 Valeo Vision Sa OPTICAL GUIDE BIT WITH BRIGHTNESS RADIATION
US7949213B2 (en) * 2007-12-07 2011-05-24 Qualcomm Mems Technologies, Inc. Light illumination of displays with front light guide and coupling elements
US8411026B2 (en) 2004-09-27 2013-04-02 Qualcomm Mems Technologies, Inc. Methods and devices for lighting displays
JP2013142774A (en) * 2012-01-11 2013-07-22 Nuflare Technology Inc Illumination device and magnifying observation device
US8872085B2 (en) 2006-10-06 2014-10-28 Qualcomm Mems Technologies, Inc. Display device having front illuminator with turning features
US8902484B2 (en) 2010-12-15 2014-12-02 Qualcomm Mems Technologies, Inc. Holographic brightness enhancement film
US8928967B2 (en) 1998-04-08 2015-01-06 Qualcomm Mems Technologies, Inc. Method and device for modulating light
US8941631B2 (en) 2007-11-16 2015-01-27 Qualcomm Mems Technologies, Inc. Simultaneous light collection and illumination on an active display
US8971675B2 (en) 2006-01-13 2015-03-03 Qualcomm Mems Technologies, Inc. Interconnect structure for MEMS device
US8979349B2 (en) 2009-05-29 2015-03-17 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US9019590B2 (en) 2004-02-03 2015-04-28 Qualcomm Mems Technologies, Inc. Spatial light modulator with integrated optical compensation structure
US9019183B2 (en) 2006-10-06 2015-04-28 Qualcomm Mems Technologies, Inc. Optical loss structure integrated in an illumination apparatus
US9025235B2 (en) 2002-12-25 2015-05-05 Qualcomm Mems Technologies, Inc. Optical interference type of color display having optical diffusion layer between substrate and electrode
US9110289B2 (en) 1998-04-08 2015-08-18 Qualcomm Mems Technologies, Inc. Device for modulating light with multiple electrodes
US9244212B2 (en) 2008-01-30 2016-01-26 Qualcomm Mems Technologies, Inc. Illumination device having a tapered light guide
EP3392115A1 (en) * 2017-04-19 2018-10-24 ALSTOM Transport Technologies Railway car

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01198710A (en) * 1988-02-03 1989-08-10 Yamatake Honeywell Co Ltd Optical projecting system
US4997259A (en) * 1988-04-28 1991-03-05 Mitsubishi Rayon Co., Ltd. Light source system with uniforming device for optical fiber type lightguide
JPH0520007U (en) * 1991-08-28 1993-03-12 グローリー工業株式会社 Image sensor light emitting device
WO1996035134A1 (en) * 1995-05-02 1996-11-07 Hermann Leber Light generator for supplying optical fibres
US8928967B2 (en) 1998-04-08 2015-01-06 Qualcomm Mems Technologies, Inc. Method and device for modulating light
US9110289B2 (en) 1998-04-08 2015-08-18 Qualcomm Mems Technologies, Inc. Device for modulating light with multiple electrodes
US9025235B2 (en) 2002-12-25 2015-05-05 Qualcomm Mems Technologies, Inc. Optical interference type of color display having optical diffusion layer between substrate and electrode
US9019590B2 (en) 2004-02-03 2015-04-28 Qualcomm Mems Technologies, Inc. Spatial light modulator with integrated optical compensation structure
US8411026B2 (en) 2004-09-27 2013-04-02 Qualcomm Mems Technologies, Inc. Methods and devices for lighting displays
FR2887997A1 (en) * 2005-06-30 2007-01-05 Valeo Vision Sa OPTICAL GUIDE BIT WITH BRIGHTNESS RADIATION
US8971675B2 (en) 2006-01-13 2015-03-03 Qualcomm Mems Technologies, Inc. Interconnect structure for MEMS device
US8872085B2 (en) 2006-10-06 2014-10-28 Qualcomm Mems Technologies, Inc. Display device having front illuminator with turning features
US9019183B2 (en) 2006-10-06 2015-04-28 Qualcomm Mems Technologies, Inc. Optical loss structure integrated in an illumination apparatus
US8941631B2 (en) 2007-11-16 2015-01-27 Qualcomm Mems Technologies, Inc. Simultaneous light collection and illumination on an active display
US7949213B2 (en) * 2007-12-07 2011-05-24 Qualcomm Mems Technologies, Inc. Light illumination of displays with front light guide and coupling elements
US9244212B2 (en) 2008-01-30 2016-01-26 Qualcomm Mems Technologies, Inc. Illumination device having a tapered light guide
US9395479B2 (en) 2008-01-30 2016-07-19 Qualcomm Mems Technologies, Inc. Illumination device having a tapered light guide
US9448353B2 (en) 2008-01-30 2016-09-20 Qualcomm Mems Technologies, Inc. Illumination device having a tapered light guide
US8979349B2 (en) 2009-05-29 2015-03-17 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US9121979B2 (en) 2009-05-29 2015-09-01 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US8902484B2 (en) 2010-12-15 2014-12-02 Qualcomm Mems Technologies, Inc. Holographic brightness enhancement film
JP2013142774A (en) * 2012-01-11 2013-07-22 Nuflare Technology Inc Illumination device and magnifying observation device
EP3392115A1 (en) * 2017-04-19 2018-10-24 ALSTOM Transport Technologies Railway car
FR3065425A1 (en) * 2017-04-19 2018-10-26 Alstom Transport Technologies RAILWAY CAR

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