【発明の名称】ホログラムを用いた投射型表示装置

Japanese Patent JP2810241

B2

This specification discloses a method of dividing a radiation beam into a first beam and a second beam differing in color from each other, modulating the first and second beams to thereby form first and second modulated beams indicative of images differing in color from each other, and projecting the images by the use of the first and second modulated beams. The radiation beam is divided into the first and second beams by a hologram (10<6>). The specification also discloses a projector having a first optical system provided with a first volume type holograms for reflectively diffracting a first beam of a certain color in a radiation beam from a radiation source and transmitting a second beam of another color therethrough to thereby resolve the radiation beam, means (10<5>) for modulating the first beam and generating a first modulated beam indicative of a first image, and modulating the second beam and generating a second modulated beam indicative of a second image, and a second optical system provided with a second volume type hologram for reflectively diffracting the first modulated beam and transmitting the second modulated beam therethrough to thereby combine the two beams, the second optical system projecting the first and second images onto a predetermined plane by the use of the combined beams.

Nago Taniguchi
Hideaki Mitsutake

JP41526190A

October 15, 1998

December 27, 1990

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Canon Inc

G02B5/32; G02B27/10; G02F1/13; G03B21/00; G03B33/12; H04N9/31; (IPC1-7): G02B5/32; G02F1/13; G03B21/00

JP5342043A
JP2503120A

【文献】英国特許出願公開2222892(GB,A)

Tadashi Wakabayashi (1 person outside)

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