The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 1991
Filed:
Aug. 21, 1989
Applicant:
Inventors:
Akitoshi Toda, Kunitachi, JP;
Hisanari Shimazu, Akishima, JP;
Akira Takano, Oume, JP;
Hirofumi Miyanaga, Hachioji, JP;
Susumu Takahashi, Kunitachi, JP;
Yoshinao Ohaki, Hachioji, JP;
Yoshisada Aoki, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; A61B / ;
U.S. Cl.
CPC ...
358 98 ; 358225 ; 359 53 ; 359 40 ; 359 92 ; 359 94 ;
Abstract
At least a part of an image forming optical system is formed of a liquid crystal assembly consisting of a plurality of liquid crystals having a refractive index anisotropy and having different response frequencies of molecule orientation so that the transmittivity and refractive index of the plurality of liquid crystals may be independently controlled with few signal lines by varying the frequency of the driving signal applied to the liquid crystal assembly.