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:
Jul. 24, 2001
Filed:
Aug. 06, 1998
Norio Tanaka, Tokyo, JP;
Shigeru Takarada, Matsudo, JP;
Hiromitsu Yanagimoto, Tokyo, JP;
Masakatsu Kai, Yokohama, JP;
Ichiro Ueno, Isehara, JP;
Other;
Abstract
The present invention provides a method of controlling light and an apparatus of controlling light capable of extracting sufficiently large and speedy optical responses from the photoresponsive photoelement with a high reproducibility, wherein the control light is emitted from the light source,, and the signal light from the light source,. The control light and signal light are converged by the converging lens,, and illuminated to the film photoelement,filled in with the photoresponsive composition. Via the collimate lens,and the band-pass filter,, only the signal light is detected with the photodetector,. By turning the control light on and off, the transmittance and/or refractive index of the signal light are reversibly increased or decreased, realizing the modulation of photointencity. By setting the numerical aperture of the collimate lens at the value essentially smaller than the numerical aperture of the collimate lens, sufficiently large and speedy optical responses can be extracted from the photoelement comprised of photoresponsive composition containing dye.