WO2001055774A8 - Reflective lcd projection system using wide-angle cartesian polarizing beam splitter and color separation and recombination prisms - Google Patents

Reflective lcd projection system using wide-angle cartesian polarizing beam splitter and color separation and recombination prisms

Info

Publication number
WO2001055774A8
WO2001055774A8 PCT/US2001/002707 US0102707W WO0155774A8 WO 2001055774 A8 WO2001055774 A8 WO 2001055774A8 US 0102707 W US0102707 W US 0102707W WO 0155774 A8 WO0155774 A8 WO 0155774A8
Authority
WO
WIPO (PCT)
Prior art keywords
light
splitter
cartesian
polarizing beam
cartesian polarizing
Prior art date
Application number
PCT/US2001/002707
Other languages
French (fr)
Other versions
WO2001055774A2 (en
WO2001055774A3 (en
Inventor
David J W Aastuen
Charles L Bruzzone
Original Assignee
3M Innovative Properties Co
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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to EP01903374A priority Critical patent/EP1250816B1/en
Priority to JP2001555855A priority patent/JP2003530584A/en
Priority to DE60101310T priority patent/DE60101310T8/en
Priority to AT01903374T priority patent/ATE255314T1/en
Publication of WO2001055774A2 publication Critical patent/WO2001055774A2/en
Publication of WO2001055774A3 publication Critical patent/WO2001055774A3/en
Publication of WO2001055774A8 publication Critical patent/WO2001055774A8/en

Links

Classifications

    • 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]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
    • 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
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • G02B27/1026—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators
    • 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
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
    • 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
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
    • 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
    • G02B5/3058—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state comprising electrically conductive elements, e.g. wire grids, conductive particles
    • 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

Abstract

An optical imaging system including an illumination system, a Cartesian PBS, and a prism assembly. The illumination system provides a beam of light, the illumination system having an f/# less than or equal to 2.5. The Cartesian polarizing beam-splitter has a first tilt axis, oriented to receive the beam of light. A first polarized beam of light having one polarization direction is folded by the Cartesian polarizing beam splitter and a second polarized beam of light having a second polarization direction is transmitted by the Cartesian polarizing beam splitter. The Cartesian polarizing beam splitter nominally polarizes the beam of light with respect to the Cartesian beam-splitter to yield the first polarized beam in the first polarization direction. The color separation and recombination prism is optically aligned to receive the first polarized beam. The prism has a second tilt axis, a plurality of color separating surfaces, and a plurality of exit surfaces. The second tilt axis may be oriented perpendicularly to the first tilt axis of the Cartesian polarizing beam-splitter so that the polarized beam is nominally polarization rotated into the second polarization direction with respect to the color separating surfaces and a respective beam of colored light exits through each of the exit surfaces. Each imager is placed at one of the exit surface of the color separating and recombining prism to receive one of the respective beams of colored light, wherein each imager can separately modulate the polarization state of the beam of colored light.
PCT/US2001/002707 2000-01-25 2001-01-25 Reflective lcd projection system using wide-angle cartesian polarizing beam splitter and color separation and recombination prisms WO2001055774A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01903374A EP1250816B1 (en) 2000-01-25 2001-01-25 Reflective lcd projection system using wide-angle cartesian polarizing beam splitter and color separation and recombination prisms
JP2001555855A JP2003530584A (en) 2000-01-25 2001-01-25 Reflective LCD projection system using wide angle Cartesian polarizing beam splitter and color separation and recombination prism
DE60101310T DE60101310T8 (en) 2000-01-25 2001-01-25 REFLECTING LCD PROJECTION SYSTEM WITH CARTESIAN WIDE ANGLE POLARIZING RADIANT AND COLORING AND UNIFYING PRISMS
AT01903374T ATE255314T1 (en) 2000-01-25 2001-01-25 REFLECTIVE LCD PROJECTION SYSTEM WITH WIDE-ANGLE CARTESIC POLARIZATION BEAM SPLITTER AND COLOR SPLITTING AND COMBINING PRISMS

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US17897300P 2000-01-25 2000-01-25
US60/178,973 2000-01-25
US09/746,933 2000-12-22
US09/746,933 US7023602B2 (en) 1999-05-17 2000-12-22 Reflective LCD projection system using wide-angle Cartesian polarizing beam splitter and color separation and recombination prisms

Publications (3)

Publication Number Publication Date
WO2001055774A2 WO2001055774A2 (en) 2001-08-02
WO2001055774A3 WO2001055774A3 (en) 2002-01-10
WO2001055774A8 true WO2001055774A8 (en) 2002-05-23

Family

ID=26874871

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/002707 WO2001055774A2 (en) 2000-01-25 2001-01-25 Reflective lcd projection system using wide-angle cartesian polarizing beam splitter and color separation and recombination prisms

Country Status (6)

Country Link
US (2) US7023602B2 (en)
EP (1) EP1250816B1 (en)
JP (1) JP2003530584A (en)
AT (1) ATE255314T1 (en)
DE (1) DE60101310T8 (en)
WO (1) WO2001055774A2 (en)

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US7023602B2 (en) 2006-04-04
DE60101310D1 (en) 2004-01-08
WO2001055774A2 (en) 2001-08-02
DE60101310T2 (en) 2004-09-09
WO2001055774A3 (en) 2002-01-10
US7652820B2 (en) 2010-01-26
US20020109795A1 (en) 2002-08-15
EP1250816B1 (en) 2003-11-26
JP2003530584A (en) 2003-10-14
US20060098284A1 (en) 2006-05-11
EP1250816A2 (en) 2002-10-23
DE60101310T8 (en) 2005-01-20
ATE255314T1 (en) 2003-12-15

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