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. 15, 2015
Filed:
Apr. 03, 2012
Koichi Kajiyama, Yokohama, JP;
Michinobu Mizumura, Yokohama, JP;
Makoto Hatanaka, Yokohama, JP;
Yoshikatsu Yanagawa, Yokohama, JP;
Koichi Kajiyama, Yokohama, JP;
Michinobu Mizumura, Yokohama, JP;
Makoto Hatanaka, Yokohama, JP;
Yoshikatsu Yanagawa, Yokohama, JP;
V TECHNOLOGY CO., LTD., Yokohama-Shi, Kanagawa, JP;
Abstract
In a laser lighting device, a fly's eye lens and a condenser lens are disposed in an optical path of pulsed laser light emitted from a light source, and an electro-optical crystal element for continuously changing the deflection direction of the pulsed laser light with respect to the incident light and allowing the deflected light to pass therethrough is disposed in a position between the light source and the fly's eye lens or between the fly's eye lens and the condenser lens. The electro-optical crystal element is formed, for example, of a pair of electrodes and an optical crystal material disposed between the electrodes, and a voltage is applied between the electrodes to produce an electric field that changes the refractive index of the electro-optical crystal element. As a result, non-uniform illumination due to interference fringes produced by light having passed through the fly's eye lens can be reduced.