EP0931275A1 - Appareil et technique de projection optique - Google Patents

Appareil et technique de projection optique

Info

Publication number
EP0931275A1
EP0931275A1 EP96933567A EP96933567A EP0931275A1 EP 0931275 A1 EP0931275 A1 EP 0931275A1 EP 96933567 A EP96933567 A EP 96933567A EP 96933567 A EP96933567 A EP 96933567A EP 0931275 A1 EP0931275 A1 EP 0931275A1
Authority
EP
European Patent Office
Prior art keywords
image
optical system
optical
anamorphic
horizontal
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.)
Withdrawn
Application number
EP96933567A
Other languages
German (de)
English (en)
Other versions
EP0931275A4 (fr
Inventor
Leo Beiser
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.)
SCRAM TECHNOLOGIES, INC.
Original Assignee
Leo Beiser
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 Leo Beiser filed Critical Leo Beiser
Publication of EP0931275A1 publication Critical patent/EP0931275A1/fr
Publication of EP0931275A4 publication Critical patent/EP0931275A4/fr
Withdrawn legal-status Critical Current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
    • G03B21/14—Details
    • G03B21/147—Optical correction of image distortions, e.g. keystone
    • 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
    • G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
    • G03B37/06—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe involving anamorphosis

Definitions

  • This invention relates to the field of optical display and, more particularly, to an optical system and method for displaying an image.
  • an image is projected and displayed on a solid panel display device.
  • the principles hereof relate to the transfer of information from the object surface to the image surfaces of the POD.
  • the manner of illuminating the object is independent of this transfer.
  • the object will be assumed conventional; either transmissive or reflective; illuminated with incoherent or coherent light.
  • One exception to this independence is the case of illumination of the POD by a scanned laser beam, wherein the "object" may be virtual; that is, contained in the software which addresses the laser beam intensity while it is scanned. This case will be discussed subsequently.
  • Figure 2 also shows a lens L t close to the POD, operating as a telecentric element to rectify keystoning. It is provided with a long focal length, whereby its focal point is positioned near the source of diverging rays (in the vicinity of C ) so that it operates on the arriving diverging ray bundles to collimate them as they propagate into the POD.
  • This additional optical power positioned close to the focal regions in the POD, also shortens slightly the original focal lengths, as calculated per Equation 1 for C h and C v alone. Considerations for this and other factors relating to the development of the focal surfaces in the POD are now discussed.
  • the scanned image can be considered for this application as integrated over time into a stationary image.
  • An analog to this process is, therefore, that of a photographic slide projector, as viewed from the principal plane of the projection lens to the screen. Everything before the lens is replaced by the scanned and modulated laser beam. Except for the diffraction-limited characteristics of coherent beam propagation, the flux from the aperture of the projection lens to the screen is analogous to the time-integrated flux during each frame of the scanned and modulated laser(s).

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lenses (AREA)

Abstract

Certains systèmes optiques d'imagerie présentent des surfaces focales de l'image verticale et de l'image horizontale disparates, dont l'une d'entre elles au moins est inclinée par rapport à l'axe optique. L'optique de projection qui éclaire lesdits systèmes doit faire en sorte que les composants verticaux de l'image convergent sur la surface de l'image verticale nominale et que les composants horizontaux de l'image convergent sur la surface de l'image horizontale disparate. Comme au moins une de ces surfaces d'image peut être inclinée par rapport à l'axe de projection, une correction est nécessaire pour maintenir la convergence sur la totalité des surfaces et éviter la déformation trapézoïdale de l'image. Le système peut également nécessiter des agrandissements verticaux et horizontaux différents des images lorsque celles-ci sont projetées sur lesdites surfaces focales disparates. L'invention décrit, entre autres, les techniques permettant de satisfaire à ces diverses exigences: projeter un champ objet rectiligne dans un système dont les plans d'image sont inclinés et disparates.
EP96933567A 1996-10-08 1996-10-08 Appareil et technique de projection optique Withdrawn EP0931275A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB1996/001129 WO1998015164A2 (fr) 1996-10-08 1996-10-08 Appareil et technique de projection optique

Publications (2)

Publication Number Publication Date
EP0931275A1 true EP0931275A1 (fr) 1999-07-28
EP0931275A4 EP0931275A4 (fr) 2000-03-01

Family

ID=11004485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96933567A Withdrawn EP0931275A4 (fr) 1996-10-08 1996-10-08 Appareil et technique de projection optique

Country Status (3)

Country Link
EP (1) EP0931275A4 (fr)
CA (1) CA2305268C (fr)
WO (1) WO1998015164A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6485145B1 (en) * 1999-12-21 2002-11-26 Scram Technologies, Inc. Optical system for display panel
US6457834B1 (en) * 2001-01-24 2002-10-01 Scram Technologies, Inc. Optical system for display panel
CA2525254A1 (fr) * 2003-05-13 2004-12-25 Scram Technologies, Inc Systeme optique de precision pour panneau d'affichage
WO2009064467A1 (fr) * 2007-11-15 2009-05-22 Tharpe Christopher S Afficheur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212397A (en) * 1962-06-25 1965-10-19 Wendell S Miller Keystone-distortion controlling system
EP0421420A2 (fr) * 1989-10-04 1991-04-10 The Spectranetics Corporation Coupleur à fibre optique à entrée linéaire
US5381502A (en) * 1993-09-29 1995-01-10 Associated Universities, Inc. Flat or curved thin optical display panel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220363A (en) * 1988-09-14 1993-06-15 Casio Computer Co., Ltd. Projector
US5422691A (en) * 1991-03-15 1995-06-06 Seiko Epson Corporation Projection type displaying apparatus and illumination system
US5455882A (en) * 1993-09-29 1995-10-03 Associated Universities, Inc. Interactive optical panel
JPH07159721A (ja) * 1993-12-08 1995-06-23 Sony Corp プロジェクター

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212397A (en) * 1962-06-25 1965-10-19 Wendell S Miller Keystone-distortion controlling system
EP0421420A2 (fr) * 1989-10-04 1991-04-10 The Spectranetics Corporation Coupleur à fibre optique à entrée linéaire
US5381502A (en) * 1993-09-29 1995-01-10 Associated Universities, Inc. Flat or curved thin optical display panel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 09, 31 October 1995 (1995-10-31) & JP 07 159721 A (SONY CORP), 23 June 1995 (1995-06-23) *
See also references of WO9815164A3 *

Also Published As

Publication number Publication date
EP0931275A4 (fr) 2000-03-01
CA2305268A1 (fr) 1998-04-16
CA2305268C (fr) 2005-12-27
WO1998015164A2 (fr) 1998-04-16
WO1998015164A3 (fr) 1998-08-27

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