GB1405531A - Variable light-beam attenuators - Google Patents

Variable light-beam attenuators

Info

Publication number
GB1405531A
GB1405531A GB820673A GB820673A GB1405531A GB 1405531 A GB1405531 A GB 1405531A GB 820673 A GB820673 A GB 820673A GB 820673 A GB820673 A GB 820673A GB 1405531 A GB1405531 A GB 1405531A
Authority
GB
United Kingdom
Prior art keywords
beam splitter
axis
laser beam
layers
prism
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
Application number
GB820673A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1405531A publication Critical patent/GB1405531A/en
Expired 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
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/14—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing polarised light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

1405531 Optical apparatus SIEMENS AG 20 Feb 1973 [21 Feb 1972] 8206/73 Heading G2J A variable light-beam attenuator for use with a linearly polarized laser beam e.g. to form a stage or studio lighting source comprises a multi-layer polarization beam splitter mounted to rotate about an axis along which an incident laser beam can be directed, the layers being disposed at the Brewster angle relative to this axis. As shown, a pair of prisms 4, 6, each of which has a base angle of 45 degrees, have their base surfaces coated with alternate layers of zinc sulphide 12 and magnesium fluoride 13 and the two outermost layers are joined by a cement film 14. The entry and exit faces 3, 15 of the resultant beam splitter have reflection-reducing coatings while the third face of prism 4 is provided with an absorptive film 9. The beam splitter is mounted within support rings 10 and 11 for rotation about axis AA'. In use, a linearly polarized laser beam 1 is incident from direction A on the entry face 3 of prism 4 producing a refracted beam in direction A' e.g. for illuminating a stage or studio and reflected beams in direction A" which are absorbed at 9. As the beam splitter is rotated relative to a polariser (not shown) the intensity of the refracted beam varies between a maximum and a minimum.
GB820673A 1972-02-21 1973-02-20 Variable light-beam attenuators Expired GB1405531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2208091A DE2208091A1 (en) 1972-02-21 1972-02-21 DEVICE FOR CONTINUOUS ATTENUATION OF THE INTENSITY OF A LASER BEAM

Publications (1)

Publication Number Publication Date
GB1405531A true GB1405531A (en) 1975-09-10

Family

ID=5836610

Family Applications (1)

Application Number Title Priority Date Filing Date
GB820673A Expired GB1405531A (en) 1972-02-21 1973-02-20 Variable light-beam attenuators

Country Status (3)

Country Link
BE (1) BE795741A (en)
DE (1) DE2208091A1 (en)
GB (1) GB1405531A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5453859A (en) * 1993-06-03 1995-09-26 Matsushita Electric Industrial Co., Ltd. Polarization beam splitter and projection display apparatus
EP1158325A2 (en) * 2000-05-22 2001-11-28 Alps Electric Co., Ltd. Beam-splitting/coupling apparatus having frame holding optical filter
EP1223452A1 (en) * 2001-01-11 2002-07-17 Nec Corporation Method and device for correcting laser beam intensity and laser device utilising the same
CN111142254A (en) * 2020-02-13 2020-05-12 之江实验室 Laser beam pointing stabilizing device for separately regulating and controlling angle drift and position drift

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986805A (en) * 1998-02-12 1999-11-16 Trw Inc. Polarizer/modulator assembly for lasers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5453859A (en) * 1993-06-03 1995-09-26 Matsushita Electric Industrial Co., Ltd. Polarization beam splitter and projection display apparatus
EP1158325A2 (en) * 2000-05-22 2001-11-28 Alps Electric Co., Ltd. Beam-splitting/coupling apparatus having frame holding optical filter
EP1158325A3 (en) * 2000-05-22 2004-03-31 Alps Electric Co., Ltd. Beam-splitting/coupling apparatus having frame holding optical filter
EP1223452A1 (en) * 2001-01-11 2002-07-17 Nec Corporation Method and device for correcting laser beam intensity and laser device utilising the same
US6770844B2 (en) 2001-01-11 2004-08-03 Nec Corporation Method of correcting laser beam intensity, laser beam intensity correction mechanism and multi-branched laser oscillation device having the same
CN111142254A (en) * 2020-02-13 2020-05-12 之江实验室 Laser beam pointing stabilizing device for separately regulating and controlling angle drift and position drift

Also Published As

Publication number Publication date
DE2208091A1 (en) 1973-10-11
BE795741A (en) 1973-06-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee