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Patent Searching and Data


Title:
ILLUMINATION OPTICAL SYSTEM AND PICTURE DISPLAY UNIT
Document Type and Number:
Japanese Patent JP2016099390
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an illumination optical system and a picture display unit capable of enhancing a contrast ratio of image light by reducing diffraction light.SOLUTION: An illumination optical system (1) includes: a light source (11); and a light uniformizing element (14) configured to uniformize luminous intensity of light from the light source (11) and emit the light. A spatial optical modulation element (2) is irradiated with the light emitted from the light uniformizing element (14). The illumination optical system (1) further includes, between the light uniformizing element (14) and the spatial optical modulation element, a phase conversion element (141) configured to convert a phase of the light in part .SELECTED DRAWING: Figure 10

Inventors:
OSAKA TAKANOBU
Application Number:
JP2014233901A
Publication Date:
May 30, 2016
Filing Date:
November 18, 2014
Export Citation:
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Assignee:
RICOH CO LTD
International Classes:
G03B21/14; G02B19/00; G02B26/00; G02B26/08; G02B27/09; H04N5/74
Attorney, Agent or Firm:
Yoshiyuki Ishibashi