Title:
OPTICAL DEFLECTOR AND IMAGE DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2005037530
Kind Code:
A
Abstract:
To suppress a ratio of noise light at the time of deflection of incident light.
A polarization direction switching means 4 which is disposed between a plurality of optical deflection elements 2 and 3 disposed in a plurality along an incident direction of light to respectively change exit optical paths for the incident light according to a change in electric field and switches the polarization direction of the incident light is constituted of a half wavelength retardation plate set in such a manner the retardation Re(λ) for an incident light wavelength λ (nm) of the case the range of the incident light wavelength (nm) is 436 (nm)<λ<700 (nm) satisfies 0.968<Re(λ)/Re(546)<1.032.
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Inventors:
TOKITA TOSHIAKI
SUGIMOTO HIROYUKI
MATSUKI YUMI
KOBAYASHI MASANORI
TAKAURA ATSUSHI
SUGIMOTO HIROYUKI
MATSUKI YUMI
KOBAYASHI MASANORI
TAKAURA ATSUSHI
Application Number:
JP2003198455A
Publication Date:
February 10, 2005
Filing Date:
July 17, 2003
Export Citation:
Assignee:
RICOH KK
International Classes:
G02B5/30; G02F1/13; G09F9/00; (IPC1-7): G09F9/00; G02B5/30; G02F1/13
Attorney, Agent or Firm:
Shinji Kashiwagi
Akira Kashiwagi
Akira Kashiwagi