Title:
PLANAR POLARIZING ELEMENT, POLARIZED LIGHT CONVERSION UNIT WITH SAME ELEMENT, AND IMAGE PROJECTION DEVICE WITH SAME UNIT
Document Type and Number:
Japanese Patent JPH05107505
Kind Code:
A
Abstract:
PURPOSE:To provide a polarizing element which efficiently uses incident light and constitutes the low-cost, small-sized image projection device. CONSTITUTION:A polarized light splitting film 104 which splits light made incident on a parallel flat plate 103 from one surface side or the other surface side into reflected light and transmitted light is provided on one surface of the transparent parallel flat plate 103; and the reflected light or transmitted light is reflected by the reflecting surface provided on the other surface of the transparent parallel flat plate 103 and directed to an optional path nearly parallel to the optical path of the other light beam, and the plane of polarization of at least one of the reflected light and transmitted light is varied to match the planes of polarization of both the light beams with each other.
Inventors:
KITAGISHI NOZOMI
Application Number:
JP8721192A
Publication Date:
April 30, 1993
Filing Date:
April 08, 1992
Export Citation:
Assignee:
CANON KK
International Classes:
G02B5/30; G02B27/28; G02F1/13; G02F1/1335; G02F1/1347; G03B33/12; H04N5/74; (IPC1-7): G02B5/30; G02B27/28; G02F1/13; G02F1/1335; G02F1/1347; G03B33/12; H04N5/74
Attorney, Agent or Firm:
Wakabayashi Tadashi
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