JPS6116043B2 - - Google Patents
Info
- Publication number
- JPS6116043B2 JPS6116043B2 JP17791582A JP17791582A JPS6116043B2 JP S6116043 B2 JPS6116043 B2 JP S6116043B2 JP 17791582 A JP17791582 A JP 17791582A JP 17791582 A JP17791582 A JP 17791582A JP S6116043 B2 JPS6116043 B2 JP S6116043B2
- Authority
- JP
- Japan
- Prior art keywords
- wedge
- light
- filter
- continuous interference
- interference filter
- 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
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)
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 spectroscope.
従来例の構成とその問題点
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
り、それゆえ高価である。また単一のウエツジ形
連続干渉フイルタを用いた場合でも、出射光の波
長純度を上げるためのコリメータレンズ系が必要
であつた。Conventional configurations and their problems Conventionally, a diffraction grating or a prism has been used as a spectral dispersion element for this type of application, but spectrometers using prisms or diffraction gratings have complicated structures and are therefore expensive. be. 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 An object of the present invention is 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、ウエツジ形連続干渉フイルタと前記
フイ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、かつ両者のフイルタ面
が平行となるように、第２のウエツジ形連続干渉
フイルタを配置するか、あるいは両フイルタを密
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エツジ
形連続干渉フイルタより構成されるものである。Structure of the Invention The present invention provides a wedge-type continuous interference filter and a second filter so that the wavelength of the transmitted light coincides with the light emitted perpendicularly to the filter surface and the filter surfaces of both filters are parallel to each other. It is constructed by arranging a wedge-shaped continuous interference filter, or by placing both filters in close contact with each other. Further, it is constructed 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、ウエツジ形連続干渉
フイルタ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.
ウエツジ形連続干渉フイルタは、第１図に示す
ように入射光がある角度を持つた場合、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、一次出射光と重なり純長純度が悪くなる。こ
のため、上記ウエツジ形連続干渉フイルタを分光
分散素子として使用する場合、平行光をフイルタ
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、上記ウエツジ形連続干渉フイ
ルタ３および４の２枚を、その透過波長位置がす
べて一致するように、ある距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イルタ面に垂直に入
射する光成分のみ、前記ウエツジ形連続干渉フイ
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。また、この出射光は単色光であり、分
光分散素子である２つのウエツジ形連続干渉フイ
ルタ３および４を通過しているため、その出射ス
ペクトルは、フレア部分が単一のウエツジ形連続
干渉フイ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つ。第３図にウエツジ形連
続干渉フイルタの出射角特性の測定系統図を示
す。光源５からの光を拡散板６で拡散させ、ウエ
ツジ形連続干渉フイルタ３の中央部に、１mm幅の
スリツト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とスリツト板７、およびウ
エツジ形干渉フイルタ３は密着し、角度の基点
は、干渉フイルタ３の干渉層においてある。ウエ
ツジ形連続干渉フイルタ１枚の場合の出射角特性
を第４図に示す。また、ウエツジ形連続干渉フイ
ルタを２枚重ねた場合の出射角度特性を第５図に
示す。第４図と第５図を比較すれば、ウエツジ形
連続干渉フイルタを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。このことは、第３図において、スリツト７
が無い場合、ウエツジ形干渉フイルタの他の位置
から出射される波長の異なる光との分離が、ウエ
ツジ形干渉フイルタを複数枚使用した方が、より
良いことを示している。 A wedge-type continuous interference filter is designed to be used 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 interference layer 2 overlaps with the primary emitted light, resulting in poor length purity. 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, when the two wedge-type continuous interference filters 3 and 4 are placed at a certain distance or overlapping each other so that their transmission wavelength positions all match, the incident light Even if the light is not parallel light, 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. In addition, this emitted light is monochromatic light and has passed through two wedge-shaped continuous interference filters 3 and 4, which are spectral dispersion elements. It has the advantage of being much smaller than the one that passed through it. FIG. 3 shows a measurement system diagram for the output angle characteristics of a wedge-type continuous interference filter. Light from a light source 5 was diffused by a diffuser plate 6, and incident on the center of the wedge-shaped continuous interference filter 3 through a 1 mm wide slit 7, and its output angle characteristics were measured. The diffuser 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-type continuous interference filter. Further, FIG. 5 shows the emission angle characteristics when two wedge-type continuous interference filters are stacked. Comparing FIG. 4 with FIG. 5, it can be seen that by stacking two wedge-type continuous interference filters, the output angle characteristic has greater unidirectionality. This means that the slit 7 in FIG.
If there is no such difference, it is shown that it is better to use a plurality of wedge-shaped interference filters for separation from light of different wavelengths emitted from other positions of the wedge-shaped interference filter.
発明の効果
以上説明したとおり本発明は、従来ウエツジ形
連続干渉フイルタを分光分散素子として使用する
場合、平行光をフイルタ面に垂直に入射させなけ
らばならなかつたが、ウエツジ形連続干渉フイル
タを複数枚、その透過光の波長の位置が一致し、
かつそれぞれのフイ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、フイルタ群に垂
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、ウエツジ形連続干渉フイルタを単一
で使用した場合に比べ改善される。さらに、上記
のウエツジ形連続干渉フイ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。Effects of the Invention As explained above, the present invention has the advantage that when conventional wedge-type continuous interference filters are used as spectral dispersion elements, parallel light must be incident perpendicularly to the filter surface. The wavelengths of the transmitted light of multiple sheets match,
In addition, when the respective filter surfaces are arranged in parallel, it is possible to select and extract only the component of light that is perpendicularly incident on the filter group from among arbitrary light as monochromatic light. Furthermore, the wavelength purity of the emitted monochromatic light is improved compared to the case where a single wedge-type continuous interference filter is used. Furthermore, when using a spectral dispersion element that combines multiple wedge-shaped continuous interference filters as described above 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、ウエツジ形連続干渉フイルタの入出
射光路を示すものである。第２図は、ウエツジ形
連続干渉フイルタ３及び４を重ねた場合の光路
図、第３図は、ウエツジ形連続干渉フイルタの出
射角度特性を測定した測定系統図、第４図は、ウ
エツジ形連続干渉フイルタ１枚の場合の出射角度
特性であり、第５図は、前記フイルタを２枚重ね
た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
エツジ形連続干渉フイルタ、４……第二のウエツ
ジ形連続干渉フイルタ、５……光源、６……拡散
板、７……スリツト、８……受光器。
FIG. 1 shows the input and output optical paths of a wedge-type 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. FIG. 5 shows the emission angle characteristics when one interference filter is used, and FIG. 5 shows the emission angle characteristics when two of the above filters are stacked. DESCRIPTION OF SYMBOLS 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... Light receiver.
Claims (1)
タ面に垂直に入射した光に対し、その透過光の波
長位置が一致し、かつ両者のフイルタ面が平行と
なるように配された複数枚のウエツジ形連続干渉
フイルタとからなる分光分散素子。1. A wedge-shaped continuous interference filter, and a plurality of wedge-shaped continuous interference filters arranged so that the wavelength position of the transmitted light coincides with the light incident perpendicularly to the filter surface, and both filter surfaces are parallel to each other. A spectral dispersion element consisting of an interference filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57177915A JPS5967503A (en) | 1982-10-08 | 1982-10-08 | Spectral dispersion element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57177915A JPS5967503A (en) | 1982-10-08 | 1982-10-08 | Spectral dispersion element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5967503A JPS5967503A (en) | 1984-04-17 |
| JPS6116043B2 true JPS6116043B2 (en) | 1986-04-28 |
Family
ID=16039281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57177915A Granted JPS5967503A (en) | 1982-10-08 | 1982-10-08 | Spectral dispersion element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5967503A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9708468D0 (en) * | 1997-04-25 | 1997-06-18 | Screen Tech Ltd | Collimator |
-
1982
- 1982-10-08 JP JP57177915A patent/JPS5967503A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5967503A (en) | 1984-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7151635B2 (en) | Planar waveguide reflective diffraction grating | |
| US2708389A (en) | Spectral wedge interference filter combined with purifying filters | |
| CA2680887C (en) | Planar waveguide wavelength dispersive devices with multiple waveguide input aperture | |
| US5784507A (en) | Integrated optical wavelength discrimination devices and methods for fabricating same | |
| US7986407B2 (en) | Method and apparatus using volume holographic wavelength blockers | |
| EP0859249A1 (en) | Optical fiber wavelength multiplexer and demultiplexer | |
| US20040032584A1 (en) | Optical channel monitoring device | |
| US6278534B1 (en) | Dispersive optical device | |
| JPS61212805A (en) | Reverser for separating a plurality of light signals in optical integration | |
| DK2929307T3 (en) | SPECTROMETER FOR ANALYZING A SPECTRUM SPECTRUM | |
| CN105547478B (en) | Imaging spectrometer based on etched diffraction grating | |
| US6940593B2 (en) | Wedged optical filter stack | |
| CN1632633A (en) | Low polarization-related loss optical filter with adjustable wavelength in a wide range | |
| US20200300699A1 (en) | Method and apparatus for linear variable bandpass filter array optical spectrometer | |
| US7116848B2 (en) | Optical spectrum analyzer using a diffraction grating and multi-pass optics | |
| US6400508B1 (en) | Compact wavelength interleaver | |
| US6606197B2 (en) | Dual grating filtering system | |
| EP1096294B1 (en) | Optical element for multiple beam separation control | |
| US7230761B2 (en) | High-dispersion grisms | |
| US7304797B2 (en) | Inputs and outputs for an optical multiplexer/demultiplexer utilizing the grating facet diffraction envelope | |
| JPS6116043B2 (en) | ||
| JPS6341411B2 (en) | ||
| JPS6148733A (en) | spectrophotometer | |
| US6583874B1 (en) | Spectrometer with holographic and echelle gratings | |
| Mahlein | A high performance edge filter for wavelength-division multi-demultiplexer units |