FR2693561B1 - Polarized light source and overhead projector using this source. - Google Patents

Polarized light source and overhead projector using this source.

Info

Publication number
FR2693561B1
FR2693561B1 FR9209007A FR9209007A FR2693561B1 FR 2693561 B1 FR2693561 B1 FR 2693561B1 FR 9209007 A FR9209007 A FR 9209007A FR 9209007 A FR9209007 A FR 9209007A FR 2693561 B1 FR2693561 B1 FR 2693561B1
Authority
FR
France
Prior art keywords
source
polarized light
overhead projector
light source
projector
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 - Fee Related
Application number
FR9209007A
Other languages
French (fr)
Other versions
FR2693561A1 (en
Inventor
Jacques Robert
Robert Jacques
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.)
ALPHAPRIME
Original Assignee
ALPHAPRIME
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 ALPHAPRIME filed Critical ALPHAPRIME
Priority to FR9209007A priority Critical patent/FR2693561B1/en
Publication of FR2693561A1 publication Critical patent/FR2693561A1/en
Application granted granted Critical
Publication of FR2693561B1 publication Critical patent/FR2693561B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3066—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state involving the reflection of light at a particular angle of incidence, e.g. Brewster's angle
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3167—Modulator illumination systems for polarizing the light beam

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Polarising Elements (AREA)
FR9209007A 1992-07-10 1992-07-10 Polarized light source and overhead projector using this source. Expired - Fee Related FR2693561B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9209007A FR2693561B1 (en) 1992-07-10 1992-07-10 Polarized light source and overhead projector using this source.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9209007A FR2693561B1 (en) 1992-07-10 1992-07-10 Polarized light source and overhead projector using this source.

Publications (2)

Publication Number Publication Date
FR2693561A1 FR2693561A1 (en) 1994-01-14
FR2693561B1 true FR2693561B1 (en) 1994-09-30

Family

ID=9432112

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9209007A Expired - Fee Related FR2693561B1 (en) 1992-07-10 1992-07-10 Polarized light source and overhead projector using this source.

Country Status (1)

Country Link
FR (1) FR2693561B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0950000A (en) * 1995-06-02 1997-02-18 Matsushita Electric Ind Co Ltd Polarizing direction converting illumination device and projection type picture display device
DE19545821A1 (en) * 1995-12-08 1997-06-12 Friedrich Dipl Ing Luellau Device for exposing printing plates
FR2754355B1 (en) * 1996-10-08 1998-12-04 Corning Inc CONVERTER OF NATURAL WHITE LIGHT TO PLANE POLARIZED LIGHT

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH061303B2 (en) * 1984-11-20 1994-01-05 ソニー株式会社 Polarized illumination device
FR2670024B1 (en) * 1990-11-30 1994-03-18 Scanera Sc POLARIZED LIGHT PRODUCTION DEVICE.
US5387953A (en) * 1990-12-27 1995-02-07 Canon Kabushiki Kaisha Polarization illumination device and projector having the same

Also Published As

Publication number Publication date
FR2693561A1 (en) 1994-01-14

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Legal Events

Date Code Title Description
ST Notification of lapse