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WO1996036893A1 - Filtre de coherence - Google Patents

Filtre de coherence Download PDF

Info

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
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.)
Ceased
Application number
PCT/SE1996/000639
Other languages
English (en)
Inventor
Nils Hugo Leopold Abramson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1996036893A1 publication Critical patent/WO1996036893A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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)
  • Lasers (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (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.
PCT/SE1996/000639 1995-05-18 1996-05-15 Filtre de coherence Ceased WO1996036893A1 (fr)

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 Ceased 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958892A (en) * 1988-10-18 1990-09-25 Physical Optics Corporation Diffraction coherence filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
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
SE9501844D0 (sv) 1995-05-18
SE9501844L (sv) 1996-11-19

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