JP3228098B2 - Light source - Google Patents

Light source

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Publication number
JP3228098B2
JP3228098B2 JP28481495A JP28481495A JP3228098B2 JP 3228098 B2 JP3228098 B2 JP 3228098B2 JP 28481495 A JP28481495 A JP 28481495A JP 28481495 A JP28481495 A JP 28481495A JP 3228098 B2 JP3228098 B2 JP 3228098B2
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JP
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Grant
Patent type
Prior art keywords
light
light source
light emitting
emitting element
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.)
Expired - Fee Related
Application number
JP28481495A
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Japanese (ja)
Other versions
JPH09127424A (en )
Inventor
由美子 杉山
健雄 田名網
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横河電機株式会社
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Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、発光ダイオードまたは半導体レーザを用いた共焦点顕微鏡や分光計等の光源に関し、特に効率を上げるための改善に関するものである。 The present invention relates to relates to a light emitting diode or light source of a confocal microscope or spectrometer or the like using a semiconductor laser, and more particularly improvements to increase efficiency.

【0002】 [0002]

【従来の技術】従来より、互いに異なる波長で発光する複数の発光ダイオード(LED)の出射光を合波して白色光を得るようにした光源があり、その構成の一例を図3に示す。 Conventionally, there is a light source to obtain white light by combining light emitted plurality of light emitting diodes (LED) emitting at different wavelengths, shows an example of a configuration in FIG. 各波長(青色、橙色、黄色、緑色、青色)のLED(1 1 〜1 5 )の発光面に直接光ファイバ2 1 Each wavelength (blue, orange, yellow, green, blue) of LED (1 1 to 1 5) Direct the optical fibers 2 1 to the light emitting surface of the
5を配置し、カップラ3でそれぞれを合成(合波) 2 5 arranged, synthesized respectively with the coupler 3 (combined)
し、更に各波長のパワーを調整することにより、カップラ3より白色光が得られるようになっている。 And, by further adjusting the power of each wavelength, white light has come to be obtained from the coupler 3.

【0003】 [0003]

【発明が解決しようとする課題】しかしながら、このような構成の光源では、入射と合成時のトータル効率が約0.006%程度であり、非常に効率が悪く微弱なパワーしか得られないという問題があった。 However [0005] In such a configuration of the light source, the total efficiency of the synthesis and the incident is about about 0.006% problem that give only very inefficient weak power was there.

【0004】本発明の目的は、このような点に鑑み、複数のLED等の発光素子の出射光を巧みに集光した、光利用効率のよい光源を実現することにある。 An object of the present invention has been made in view of such points, and skillfully condenses the light emitted from the light emitting element such as a plurality of LED, is to realize a light source light utilization efficiency.

【0005】 [0005]

【課題を解決するための手段】このような目的を達成するために本発明では、 互いに異なる波長で発光する複数の発光素子の出射光を組み合わせた光源であって、 前記 Means for Solving the Problems] In the present invention in order to achieve the above object, a light source that combines the light emitted plurality of light emitting elements that emit light at different wavelengths, wherein
各発光素子ごとにその発散光の大半を集めて個別に平行光とする複数のレンズを備えた光学手段と、前記複数の平行光を1箇所に集光する集光手段と、この集光手段により集光された光を受けると共に集光された光の外側の光を遮光する開口部を備えたことを特徴とする。 Optical means having a plurality of lenses to be individually collimated light attracts most of the diverging light for each light emitting element, a focusing means for focusing said plurality of parallel light in one place, the focusing means characterized by comprising an aperture for blocking light outside the focused light with receiving light condensed by.

【0006】 [0006]

【作用】複数の発光素子からの出射光を個別の光学手段により平行光にし、これらの平行光を集光手段で集光して1箇所に寄せ集める。 And collimated by separate optical means the light emitted from the [action] plurality of light emitting elements, put together and condensed in one place with focusing means these parallel light. 1箇所に集光した光を光ファイバまたはピンホールに入射させるようにする。 The light collected in one place so as to be incident on the optical fiber or pinhole. これにより、コア径の小さい1本の光ファイバへの入射が可能となり、従来のような光カップラや多数の光ファイバを用いることなく容易に光利用効率を上げることができ、かなり大きなパワーの白色光を容易に得ることができる。 This enables entering the small one optical fiber core diameters, without using a conventional optical coupler or a number of optical fibers, such as easily can be increased light utilization efficiency, a considerably large power white it is possible to obtain light with ease.
さらに、集光された光の外側の光は開口制限により遮蔽することにより以下のような効果も発揮される。 Furthermore, light outside the condensed light is also exerted following effects by shielding the aperture restriction. 本発明 The present invention
における発光素子は点光源でないためレンズを通しても Also through the lens for the light emitting element is not a point light source in the
真の平行光は得られない。 Not obtained true parallel light. 集光部ではそのフーリェ変換 Its Fourier transform by the condenser unit
像となる。 The image. そこで集光部の開口を制限して集光された光 Therefore to limit the aperture of the condensing unit light collected
の外側の光を遮蔽すると、高次の歪みが除去できる。 When shielding the outside light, higher order distortion can be removed. Tooth
たがって、光ファイバからの出射光はほぼ点光源として Therefore, light emitted from the optical fiber is a substantially point source
扱える良質の光源となる。 The good quality of the light source that can be handled.

【0007】 [0007]

【発明の実施の形態】以下図面を用いて本発明を詳しく説明する。 The present invention will be described in detail with reference to DETAILED DESCRIPTION OF THE INVENTION The following drawings. 図1は本発明に係る光源の一実施例を示す構成図である。 Figure 1 is a block diagram showing an embodiment of a light source according to the present invention. なお、図3と同等部分には同一符号を付し、その部分の説明は省略する。 The same reference numerals are assigned to the 3 equivalent portions, description thereof is omitted. 図1において、5 1 In FIG. 1, 5 1 to
5は各LED1 1 〜1 5からの発散光をそれぞれ平行光にするためのレンズ、6は各レンズ5 1 〜5 5からの平行光を1点に集光するレンズである。 5 5 lens for collimating light divergent light respectively from the LED1 1 to 1 5, 6 is a lens for condensing the collimated light from the lens 5 1 to 5 5 to 1 point. 7はファイバで、その端面がレンズ6の集光位置に配置されている。 7 is a fiber, the end face thereof is disposed in the condensing position of the lens 6.

【0008】このような構成において、各LED1 1 [0008] In such a configuration, each of LED1 1 ~
5からの発散光はレンズ5 1 〜5 5により平行光となり、続いてレンズ6により1箇所(1点)に集光され、 Divergent light from 1 to 5 lens 5 becomes parallel light by 1-5 5, followed by a lens 6 is focused on one location (1 point),
その集光位置に配置された1本の光ファイバ7の端面に入射する。 Incident on the end face of one optical fiber 7 which is arranged at the focusing position. 各LED1 1 〜1 5のパワーを調整し(調整手段については周知の技術であるので図示および説明を省略する)、光ファイバ7の出射光が白色光になるようにする。 Adjust each LED1 1 to 1 5 of the power (not shown and described because it is well-known technique for adjusting means), so that the outgoing light of the optical fiber 7 becomes white light.

【0009】なお、LED自身は点光源でないため、レンズ5 1 〜5 5を通しても真の平行光は得られない。 [0009] Incidentally, LED itself because not a point light source, not obtained true parallel light be passed through a lens 5 1-5 5. しかし、集光部ではそのフーリエ変換像となるので、開口制限により、高次の歪みを除去することができる。 However, the condensing section since its Fourier transform image, the aperture limiting, it is possible to remove the distortion of higher order. したがって、光ファイバ7からの出射光はほぼ点光源として扱える良質の光源となる。 Therefore, light emitted from the optical fiber 7 is the good quality of the light source which can be handled as substantially a point light source.

【0010】なお、本発明はその本質から逸脱せずに多くの変更、変形をなし得る。 [0010] The present invention is many changes without departing from its essence, can make deformation. 例えば、LEDは半導体レーザ(LD)で置き換えてもよい。 For example, LED may be replaced by a semiconductor laser (LD). また、出射光は白色に限定されない。 Further, the emitted light is not limited to white. 例えば共焦点蛍光顕微鏡の励起光として用いる場合は、発光素子が青色などの単色だけでもよい。 For example, when used as the excitation light of confocal fluorescence microscopy, light emitting elements may only monochromatic, such as blue. また、分光器の光源として用いる場合は、必ずしも白色である必要はなく、測定対象の吸収特性が顕著に現れる波長の光量を強くした方が良いS/Nが得られる。 In the case of using as a spectroscope light source need not necessarily be white, good S / N Write absorption characteristics are strongly amount of wavelength prominent to be measured is obtained.

【0011】また、レンズの集光部はレンズの焦点位置ではなく、若干ピントの外れた位置としてもにい。 Further, the condensing portion of the lens is not the focal point of the lens, not boiled even position slightly off focus. この場合、効率はやや低下するが、LEDの光源像がぼけた形で開口部に入るため、光量むらの少ない光源が得られる。 In this case, the efficiency is slightly decreased, to enter the opening in the form of light source image of the LED is blurred, less light intensity variation light source is obtained. また、開口部は光ファイバ7ではなく、図2に示すように基板8のピンホール9としてもよい。 The opening is not the optical fiber 7 may be pin hole 9 of the substrate 8 as shown in FIG. この場合ピンホール9の後にレンズ10を入れれば平行光が得られる。 Collimated light is obtained if you put the lens 10 after this case pinhole 9. ファイバを使用しないため光効率は更に向上する。 Light efficiency is further improved because it does not use the fiber.
更にまた、レンズ6の代わりに、ホログラムあるいはフレネルレンズを用いてもよい。 Furthermore, instead of the lens 6, Ho Rogura Moore Rui may use a Fresnel lens.

【0012】 [0012]

【発明の効果】以上説明したように本発明によれば、L According to the present invention as described above, according to the present invention, L
EDの発散光を平行光にしたため各波長を1点に集光させることができ、コア径の小さい1本の光ファイバへの入射が可能となり、従来のような光カップラや多数の光ファイバを用いることなく容易に光利用効率を上げることができる。 ED each wavelength due to the parallel light divergent light can be focused to a point, it is possible to entering the small one optical fiber core diameters, the conventional optical coupler or a number of optical fibers, such as easily it can be improved light utilization efficiency without using. これにより、かなり大きなパワーの白色光が得られ、実用に供してその効果は大きい。 Thus, considerable white light of a large power can be obtained, the effect is large in practically. また集光部で開口制限しているため、出射光として良質の光を容易に得ることができる。 Also because of the aperture restriction by the condenser unit, it is possible to obtain a high-quality light easily as emitted light.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明に係る光源の一実施例を示す構成図 Constitutional view showing one embodiment of a light source according to the present invention; FIG

【図2】本発明の他の実施例の部分構成図 Figure 2 is a partial block diagram of another embodiment of the present invention

【図3】従来の光源の一例を示す構成図である。 3 is a block diagram showing an example of a conventional light source.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 〜1 5 LED 5 1 〜5 5 ,6 レンズ 7 光ファイバ 8 基板 9 ピンホール 10 レンズ 1 1 ~1 5 LED 5 1 ~5 5, 6 lens 7 optical fiber 8 substrate 9-pin hole 10 lenses

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl. 7 ,DB名) G02B 19/00 - 21/00 G02B 21/06 - 21/32 G02B 6/00 ────────────────────────────────────────────────── ─── front page of the continuation (58) investigated the field (Int.Cl. 7, DB name) G02B 19/00 - 21/00 G02B 21/06 - 21/32 G02B 6/00

Claims (6)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】 互いに異なる波長で発光する複数の発光素子の出射光を組み合わせた光源であって、 前記各発光素子ごとにその発散光の大半を集めて個別に平行光とする複数のレンズを備えた光学手段と、 前記複数の平行光を1箇所に集光する集光手段と、 この集光手段により集光された光を受けると共に、集光された光の外側の光を遮光する開口部を具備したことを特徴とする光源。 1. A light source that combines the light emitted plurality of light emitting elements that emit light at different wavelengths, a plurality of lenses to be individually collimated light attracts most of the diverging light for each of the respective light emitting elements optical means having a focusing means for focusing said plurality of parallel light in one place, the receiving light condensed by the condenser means, an opening for shielding light outside the condensed light light source, characterized by comprising the part.
  2. 【請求項2】前記発光素子として、発光ダイオードまたは半導体レーザを用いた請求項1記載の光源。 Wherein as said light emitting element, a light source of claim 1 wherein using light emitting diodes or semiconductor lasers.
  3. 【請求項3】前記集光手段として、レンズまたはホログラムまたはフレネルレンズを使用した請求項1記載の光源。 Wherein as said condensing means, lens or light source according to claim 1, wherein using a hologram or a Fresnel lens.
  4. 【請求項4】前記開口部が光ファイバまたはピンホールである請求項1記載の光源。 4. A light source according to claim 1, wherein said opening is an optical fiber or a pinhole.
  5. 【請求項5】前記発光素子として、異なる発光色の複数の発光素子を組み合わせて使用する請求項1記載の光源。 As claimed in claim 5, wherein said light emitting element, a light source of claim 1 wherein using a combination of a plurality of light emitting elements of different emission colors.
  6. 【請求項6】前記各発光素子の発光色の光量を調整することにより白色の出射光が得られるようにした請求項5 Wherein said claim 5 as a white emission light can be obtained by adjusting the amount of light emission color of each light-emitting element
    記載の光源。 Light source according.
JP28481495A 1995-11-01 1995-11-01 Light source Expired - Fee Related JP3228098B2 (en)

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JP28481495A JP3228098B2 (en) 1995-11-01 1995-11-01 Light source

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7050238B2 (en) 2003-10-07 2006-05-23 Ricoh Optical Industries Co., Ltd. Power combination optical system and light source module

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JP2000021206A (en) 1998-07-02 2000-01-21 Ccs Kk Lighting system
EP1111333A4 (en) * 1999-06-29 2002-08-28 Omron Tateisi Electronics Co Light source device, spectroscope comprising the light source device, and film thickness sensor
JP2002323628A (en) 2001-04-25 2002-11-08 Nec Corp Multiple wavelength semiconductor light source and its manufacturing method
DE10245526B4 (en) * 2002-09-30 2005-05-12 Litef Gmbh Spectrally broadband light source of high light output
DE10246889B4 (en) 2002-10-08 2004-08-19 Karl Kaps Gmbh & Co. Kg Lighting device for an optical enlarger and optical enlarger
JP2005010296A (en) * 2003-06-17 2005-01-13 Olympus Corp Fluorescent microscope
US7215468B2 (en) 2003-07-29 2007-05-08 Olympus Corporation Confocal microscope
DE10339618A1 (en) * 2003-08-28 2005-03-24 Leica Microsystems (Schweiz) Ag LEDs lighting for an optical observation device, in particular a stereo or a stereo surgical microscope
EP1731933A4 (en) 2004-03-16 2009-04-08 Sumitomo Electric Industries Irradiating light transmitting optical fiber and light irradiating device provided with it
DE102004030669A1 (en) * 2004-06-24 2006-01-19 Leica Microsystems Cms Gmbh microscope
US7561329B2 (en) * 2006-12-14 2009-07-14 Cytyc Corporation Illumination source for stained biological samples
EP2198268A4 (en) * 2007-10-04 2016-04-06 Univ Missouri Optical device components
JP2015072956A (en) * 2013-10-02 2015-04-16 株式会社島津製作所 Light-emitting device
JP2015127649A (en) * 2013-12-27 2015-07-09 アズビル株式会社 Dryness measuring device and dryness measuring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7050238B2 (en) 2003-10-07 2006-05-23 Ricoh Optical Industries Co., Ltd. Power combination optical system and light source module

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