JPS5967503A - Spectroscopic dispersion element - Google Patents
Spectroscopic dispersion elementInfo
- Publication number
- JPS5967503A JPS5967503A JP17791582A JP17791582A JPS5967503A JP S5967503 A JPS5967503 A JP S5967503A JP 17791582 A JP17791582 A JP 17791582A JP 17791582 A JP17791582 A JP 17791582A JP S5967503 A JPS5967503 A JP S5967503A
- Authority
- JP
- Japan
- Prior art keywords
- light
- filter
- continuous interference
- wedge
- filters
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectrometry And Color Measurement (AREA)
- Optical Filters (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、分光器において光をその波長別に分離する
分光分散素子に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a spectral dispersion element that separates light into wavelengths in a spectrometer.
仔１１
従ｒｏ構成とその問題点
従来この種・の用途には、分光分散素子として回折格子
あるいはプリズムが使用されるが、プリズムや回折格子
を用いた分光器は、構造が複雑とな：す、それゆえ高価
である。また単一のウェッジ形連続干渉フィルタを用い
た場合でも、出射光の波長純度を上げるだめのコリメー
タレンズ系が必要であった。11 Subroute structure and its problems Conventionally, a diffraction grating or a prism is used as a spectral dispersion element for this type of application, but spectrometers using prisms or diffraction gratings have complicated structures. , and therefore expensive. Furthermore, even when a single wedge-shaped continuous interference filter is used, a collimator lens system is required to increase the wavelength purity of the emitted light.
発明の目的
本発明は、従来の分光分散素子であるプリズムや回折格
子を使用した分光器に比べ、光学系が単純で構造が簡単
な分光器を構成することを目的とする。OBJECTS OF THE INVENTION It is an object of the present invention to construct a spectrometer with a simpler optical system and simpler structure than spectrometers using conventional spectral dispersion elements such as prisms and diffraction gratings.
発明の構成
本発明は、ウェッジ形連続干渉フィルタと前記フィルタ
面に垂直に出射する光に対し、その透過光の波長の位置
が一致し、かつ両者のフィルタ面が平行となるように、
第２のウェッジ形連続干渉フィルタを配置するか、ある
いは両フィルタを密着させることにより構成される。ま
た、前記配置条件を満足するように配された複数枚のウ
ェッジ形連続干渉フィルタより構成されるものである。Structure of the Invention The present invention provides a wedge-shaped continuous interference filter and light emitted perpendicularly to the filter surface, so that the wavelength position of the transmitted light matches and the filter surfaces of both filters are parallel to each other.
It is constructed by arranging a second wedge-shaped continuous interference filter or by bringing both filters into close contact with each other. Further, it is composed of a plurality of wedge-shaped continuous interference filters arranged so as to satisfy the above-mentioned arrangement conditions.
実施例の説明
本発明の一実施例として、ウェッジ形連続干渉フィルタ
２枚を組み合わせた場合について図面を使用して説明す
る。DESCRIPTION OF EMBODIMENTS As an embodiment of the present invention, a case in which two wedge-type continuous interference filters are combined will be described with reference to the drawings.
ウェッジ形連続干渉フィルタは、第１図に示すように入
射光がある角度を持った場合、ガラス１と空間、ガラス
１と干渉層２との２面での反射光が、−成田射光と重な
り波長純度が悪くなる。このため、上記ウェッジ形連続
干渉フィルタを分光分散素子として使用する場合、平行
光をフィルタ面に垂直に入射させなければならない。そ
こで第２図に示すように、上記ウェッジ形連続干渉フィ
ルタ３および４０２枚を、その透過波長位置がすべて一
致するように、ある踏離をおいて配置するかあるいは重
ね合わせた場合、入射光が平行光でなくてもその光の中
で前記フィルタ面に垂直に入射する光成分のみ、前記ウ
ェッジ形連続干渉フィルタ４の出射光として、他の入射
角成分光から分離される。壕だ、この出射光は単色光で
あり、分光分散素子である２つのウェッジ形連続干渉フ
ィルタ３および４を通過しているだめ、その出射スペク
トルは、フレア部分が単一のウェッジ形連続干渉フィル
タを通過したものより、はるかに小さくなるという利点
を持一つ。第３図にウェッジ形連続干渉フィルタの出射
角特性の測定系統図を示す。In a wedge-shaped continuous interference filter, when the incident light has a certain angle as shown in Figure 1, the reflected light from the two surfaces of the glass 1 and the space and the glass 1 and the interference layer 2 overlaps with the -Narita emitted light. Wavelength purity deteriorates. Therefore, when the wedge-shaped continuous interference filter is used as a spectral dispersion element, parallel light must be made perpendicular to the filter surface. Therefore, as shown in FIG. 2, if the wedge-shaped continuous interference filters 3 and 402 are arranged at a certain distance or stacked one on top of the other so that their transmission wavelength positions all match, the incident light will be Even if the light is not parallel, only the light component that is incident perpendicularly to the filter surface is separated from the other incident angle component light as the output light of the wedge-shaped continuous interference filter 4. Well, this output light is monochromatic light, and it passes through two wedge-shaped continuous interference filters 3 and 4, which are spectral dispersion elements. One that has the advantage of being much smaller than the one that passed through it. FIG. 3 shows a measurement system diagram of the output angle characteristics of a wedge-shaped continuous interference filter.
光源５からの光を拡散板６で拡散させ、ウェッジ形連続
干渉フィルタ３の中央部に、１ｍｍ幅のスリット７を通
して入射させ、その出射角度特性を測定した。拡散板６
とスリット板７、およびウェッジ形干渉フィルタ３は密
着し、角度の基点は、干渉フィルタ３の干渉層においで
ある。ウェッジ形連続干渉フィルタ１枚の場合の出射角
特性を第４図に示す。また、ウェッジ形連続干渉フィル
タを２枚重ねだ場合の出射角度特性を第５図に示す。Light from a light source 5 was diffused by a diffuser plate 6, and incident on the center of a wedge-shaped continuous interference filter 3 through a 1 mm wide slit 7, and its output angle characteristics were measured. Diffusion plate 6
The slit plate 7 and the wedge-shaped interference filter 3 are in close contact with each other, and the origin of the angle is at the interference layer of the interference filter 3. FIG. 4 shows the output angle characteristics in the case of one wedge-shaped continuous interference filter. FIG. 5 shows the output angle characteristics when two wedge-shaped continuous interference filters are stacked.
第４図と第５図を比較すれば、ウェッジ形連続干渉フィ
ルタを２枚重ねることにより、その出射角特性はより大
きな単一指向性を持つ事がわかる。Comparing FIG. 4 and FIG. 5, it can be seen that by stacking two wedge-shaped continuous interference filters, the output angle characteristic has greater unidirectionality.
このことは、第３図において、スリット７が無い場合、
ウェッジ形干渉フィルタの他の位置から出射される波長
の異なる光との分離が、ウェッジ形干渉フィルタを複数
枚使用した方が、より良いことを示している。This means that if there is no slit 7 in FIG.
This shows that the separation from light of different wavelengths emitted from other positions of the wedge-shaped interference filter is better when a plurality of wedge-shaped interference filters are used.
発明の詳細
な説明したとおり本発明は、従来ウェッジ形連続干渉フ
ィルタを分光分散素子として使用する場合、平行光をフ
ィルタ面に垂直に入射させなければならなかったが、ウ
ェッジ形連続干渉フィルタを複数枚、その透過光の波長
の位置が一致し、かつそれぞれのフィルタ面が平行とな
るように配置した場合、任意の光の中から、フィルタ群
に垂直に入射する成分の光のみ単色光として選択して取
り出すことができる。また、その出射単色光の波長純度
は、ウェッジ形連続干渉フィルタを単一で使用した場合
に比べ改善される。さらに、上記のウェッジ形連続干渉
フィルタを複数枚組み合わせた分光分散素子を、分光器
に使用した場合、従来の回折格子やプリズムを使用した
分光器に比べ、光学的な構造が簡単な分光器を構成でき
る。Detailed Description of the Invention As described in detail, the present invention is capable of using a plurality of wedge-shaped continuous interference filters, whereas conventionally, when using a wedge-shaped continuous interference filter as a spectral dispersion element, parallel light had to be incident perpendicularly to the filter surface. If the two filters are arranged so that the wavelengths of their transmitted light match and their filter surfaces are parallel, only the light component that is incident perpendicularly to the filter group is selected as monochromatic light. You can take it out. Furthermore, the wavelength purity of the emitted monochromatic light is improved compared to the case where a single wedge-shaped continuous interference filter is used. Furthermore, when a spectral dispersion element that combines multiple wedge-shaped continuous interference filters described above is used in a spectrometer, the optical structure of the spectrometer is simpler than that of a spectrometer that uses conventional diffraction gratings or prisms. Can be configured.
第１図は、ウェッジ形連続干渉フィルタの人出射光路を
示すものである。第２図は、ウェッジ形連続干渉フィル
タ３及び４を重ねた場合の光路図、第３図は、ウェッジ
形連続干渉フィルタの出射角度特性を測定した測定系統
図、第４図は、ウェッジ形連続干渉フィルタ１枚の場合
の出射角度特性であり、第５図は、前記フィルタを２枚
重ねだ場合の出射角度特性である。
１・・・・・・ガラス、２・・・・・干渉層、３・・・
・・・第一のウェッジ形連続干渉フィルタ、４・・・・
・・第二のウェッジ形連続干渉フィルタ、５・・・・・
・光源、６・・・・・・拡散板、７・・・・・・スリッ
ト、８・・・・・・受光器。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第
１ 図
第２図
第４図FIG. 1 shows the human output optical path of a wedge-shaped continuous interference filter. Figure 2 is an optical path diagram when wedge-type continuous interference filters 3 and 4 are stacked, Figure 3 is a measurement system diagram for measuring the output angle characteristics of the wedge-type continuous interference filter, and Figure 4 is a wedge-type continuous interference filter. This is the output angle characteristic when one interference filter is used, and FIG. 5 is the output angle characteristic when two of the filters are stacked. 1...Glass, 2...Interference layer, 3...
...First wedge-shaped continuous interference filter, 4...
...Second wedge-shaped continuous interference filter, 5...
・Light source, 6...Diffusion plate, 7...Slit, 8...Receiver. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2 Figure 4
Claims (1)
に入射した光に対し、その透過光の波長位置が一致し、
かつ両者のフィルタ面が平行となるように配された複数
枚のウェッジ形連続干渉フィルタとからなる分光分散素
子。The wedge-shaped continuous interference filter and the wavelength position of the transmitted light match with respect to the light incident perpendicularly to the filter surface,
A spectral dispersion element comprising a plurality of wedge-shaped continuous interference filters arranged so that their filter surfaces are parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17791582A JPS5967503A (en) | 1982-10-08 | 1982-10-08 | Spectroscopic dispersion element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17791582A JPS5967503A (en) | 1982-10-08 | 1982-10-08 | Spectroscopic dispersion element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5967503A true JPS5967503A (en) | 1984-04-17 |
| JPS6116043B2 JPS6116043B2 (en) | 1986-04-28 |
Family
ID=16039281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17791582A Granted JPS5967503A (en) | 1982-10-08 | 1982-10-08 | Spectroscopic dispersion element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5967503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049585A1 (en) * | 1997-04-25 | 1998-11-05 | The Secretary Of State For Defence | Collimator |
-
1982
- 1982-10-08 JP JP17791582A patent/JPS5967503A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049585A1 (en) * | 1997-04-25 | 1998-11-05 | The Secretary Of State For Defence | Collimator |
| US6078421A (en) * | 1997-04-25 | 2000-06-20 | The Secretary Of State For Defence In Her Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Light modulator including a collimator comprising an interference filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6116043B2 (en) | 1986-04-28 |
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