Title:
光学系及びそれを用いた装置
Document Type and Number:
Japanese Patent JP4751534
Kind Code:
B2
Abstract:
The invention relates to a viewing and an image pickup optical system for display devices, which can be used with high efficiency at a plurality of wavelengths and enables bright images to be viewed with satisfactory color reproducibility and well-corrected aberrations. The optical system comprises a first prism 3, a second prism 4 and a volume hologram element 6 disposed between them and cemented to them. The hologram element 6 comprises a first volume hologram optimized in such a way as to effect diffraction at least at a first wavelength and a second hologram optimized in such a way as to effect diffraction at a second wavelength different from the first wavelength. The first and second holograms forming the hologram element 6 are identical with each other in terms of the shape and spacing of interference fringes on their surfaces but different from each other in terms of the spacing and tilt of interference fringes in their hologram media.
More Like This:
Inventors:
Yasuyuki Oyagi
Tetsuhide Takeyama
Tetsuhide Takeyama
Application Number:
JP2001222961A
Publication Date:
August 17, 2011
Filing Date:
July 24, 2001
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
Olympus Endo Technology America Inc.
Olympus Endo Technology America Inc.
International Classes:
G02B17/08; G02B5/04; G02B5/32; G02B23/14; G02B23/24; G02B25/00; G02B27/01; G02B27/02; G02F1/13; G02F1/1335; H04N5/225; H04N5/64; H04N13/04; G02B27/00
Attorney, Agent or Firm:
Hiroshi Nagisawa
Ryukichi Abe
Hirukawa Masanobu
Norihiko Uchida
Hideo Sugai
Kenji Aoki
Akira Yonezawa
Ryukichi Abe
Hirukawa Masanobu
Norihiko Uchida
Hideo Sugai
Kenji Aoki
Akira Yonezawa