WO1996036893A1 - Filtre de coherence - Google Patents
Filtre de coherence Download PDFInfo
- Publication number
- WO1996036893A1 WO1996036893A1 PCT/SE1996/000639 SE9600639W WO9636893A1 WO 1996036893 A1 WO1996036893 A1 WO 1996036893A1 SE 9600639 W SE9600639 W SE 9600639W WO 9636893 A1 WO9636893 A1 WO 9636893A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- light beams
- output
- optical filter
- grating
- Prior art date
Links
- 230000001427 coherent effect Effects 0.000 claims abstract description 18
- 230000001066 destructive effect Effects 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims description 23
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 8
- 230000037361 pathway Effects 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4272—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path
- G02B27/4277—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path being separated by an air space
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/284—Interference filters of etalon type comprising a resonant cavity other than a thin solid film, e.g. gas, air, solid plates
Definitions
- fig 2 shows a coherence filter according to a second embodiment of the invention
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Lasers (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Abstract
L'invention concerne un dispositif qui, au moyen d'une interférence destructive, arrête la lumière cohérente émise par les lasers mais laisse passer la lumière incohérente. Ce dispositif comprend quatre réseaux identiques (G1, G2, G3, G4). Une partie d'un faisceau parallèle de lumière laser au niveau d'une position d'entrée (A) est diffractée par les réseaux. Une autre partie du faisceau passe à travers les réseaux et entre en interférence avec le faisceau diffracté au niveau d'une position de sortie (B). Indépendamment de la longueur d'onde de la lumière laser, le faisceau diffracté et le faisceau non diffracté se rencontreront au niveau du quatrième réseau (G4) sous l'effet de la symétrie selon un angle similaire à l'angle de leur sortie du premier réseau (G1). De ce fait, l'interférence destructive peut apparaître au niveau du quatrième réseau (G4) à travers la totalité de la largeur du faisceau.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9501844-6 | 1995-05-18 | ||
| SE9501844A SE9501844L (sv) | 1995-05-18 | 1995-05-18 | Koherens filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996036893A1 true WO1996036893A1 (fr) | 1996-11-21 |
Family
ID=20398354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE1996/000639 WO1996036893A1 (fr) | 1995-05-18 | 1996-05-15 | Filtre de coherence |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE9501844L (fr) |
| WO (1) | WO1996036893A1 (fr) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4958892A (en) * | 1988-10-18 | 1990-09-25 | Physical Optics Corporation | Diffraction coherence filter |
-
1995
- 1995-05-18 SE SE9501844A patent/SE9501844L/ not_active Application Discontinuation
-
1996
- 1996-05-15 WO PCT/SE1996/000639 patent/WO1996036893A1/fr active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4958892A (en) * | 1988-10-18 | 1990-09-25 | Physical Optics Corporation | Diffraction coherence filter |
Also Published As
| Publication number | Publication date |
|---|---|
| SE9501844L (sv) | 1996-11-19 |
| SE9501844D0 (sv) | 1995-05-18 |
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| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| 122 | Ep: pct application non-entry in european phase |