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WO2001027693A3 - Projection display employing switchable holographic optical elements - Google Patents

Projection display employing switchable holographic optical elements Download PDF

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Publication number
WO2001027693A3
WO2001027693A3 PCT/US2000/028020 US0028020W WO0127693A3 WO 2001027693 A3 WO2001027693 A3 WO 2001027693A3 US 0028020 W US0028020 W US 0028020W WO 0127693 A3 WO0127693 A3 WO 0127693A3
Authority
WO
WIPO (PCT)
Prior art keywords
eshoe
light
bandwidth
diffracted
bandwidth light
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/US2000/028020
Other languages
French (fr)
Other versions
WO2001027693A2 (en
Inventor
Milan M Popovich
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.)
DigiLens Inc
Original Assignee
DigiLens Inc
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 DigiLens Inc filed Critical DigiLens Inc
Priority to PCT/US2000/028020 priority Critical patent/WO2001027693A2/en
Priority to AU80078/00A priority patent/AU8007800A/en
Publication of WO2001027693A2 publication Critical patent/WO2001027693A2/en
Publication of WO2001027693A3 publication Critical patent/WO2001027693A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Holo Graphy (AREA)

Abstract

The present invention relates to an optical system for use in a projection display system. The optical system, in one embodiment, includes a first electrically switchable holographic optical element (ESHOE) (42) and a light deflector (40). The first ESHOE operates between active and inactive states and includes oppositely facing front (44) and back surfaces (46). In the inactive state, the first ESHOE transmits first bandwidth light (32) received on the front surface without substantial alteration. In the active state, the first ESHOE diffracts first bandwidth light (34) received on the front surface, the diffracted first bandwidth light emerging also from the front surface. The light deflector receives first bandwidth light diffracted by the first ESHOE. In response, the light deflector deflects this diffracted first bandwidth light. The first ESHOE and the light deflector are positioned such that first bandwidth light transmitted through the inactive first ESHOE without substantial alteration can illuminate a first surface area (22) while first bandwidth light diffracted by the active first ESHOE and subsequently deflected by the light deflector can illuminate a second non-overlapping surface area (20) adjacent to the first surface area (22).
PCT/US2000/028020 1999-10-08 2000-10-10 Projection display employing switchable holographic optical elements Ceased WO2001027693A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2000/028020 WO2001027693A2 (en) 2000-10-10 2000-10-10 Projection display employing switchable holographic optical elements
AU80078/00A AU8007800A (en) 1999-10-08 2000-10-10 Projection display employing switchable holographic optical elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/028020 WO2001027693A2 (en) 2000-10-10 2000-10-10 Projection display employing switchable holographic optical elements

Publications (2)

Publication Number Publication Date
WO2001027693A2 WO2001027693A2 (en) 2001-04-19
WO2001027693A3 true WO2001027693A3 (en) 2001-12-20

Family

ID=21741875

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/028020 Ceased WO2001027693A2 (en) 1999-10-08 2000-10-10 Projection display employing switchable holographic optical elements

Country Status (2)

Country Link
AU (1) AU8007800A (en)
WO (1) WO2001027693A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0421628A2 (en) * 1989-10-05 1991-04-10 Seiko Epson Corporation Projection type liquid crystal display device
WO2000028369A2 (en) * 1998-11-12 2000-05-18 Digilens, Inc. Head mounted apparatus for viewing an image

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0421628A2 (en) * 1989-10-05 1991-04-10 Seiko Epson Corporation Projection type liquid crystal display device
WO2000028369A2 (en) * 1998-11-12 2000-05-18 Digilens, Inc. Head mounted apparatus for viewing an image

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"INTERFRAME MULTIPLEXED VIDEO PROJECTION DISPLAY", IBM TECHNICAL DISCLOSURE BULLETIN,US,IBM CORP. NEW YORK, vol. 33, no. 2, 1 July 1990 (1990-07-01), pages 63, XP000123531, ISSN: 0018-8689 *
DOMASH L H ET AL: "APPLICATIONS OF SWITCHABLE POLAROID HOLOGRAMS", PROCEEDINGS OF THE SPIE,US,SPIE, BELLINGHAM, VA, vol. 2152, 26 January 1994 (1994-01-26), pages 127 - 138, XP002057590 *

Also Published As

Publication number Publication date
WO2001027693A2 (en) 2001-04-19
AU8007800A (en) 2001-04-23

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