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:
Apr. 27, 1976
Filed:
Jul. 01, 1974
Tsutomu Yano, Kawasaki, JA;
Yasumasa Nabeta, Tokyo, JA;
Koetsu Saito, Kawasaki, JA;
Akinori Watanabe, Komae, JA;
Matsushita Electric Industrial Company, Ltd., Osaka, JA;
Abstract
An acousto-optic filter utilizing the far-off-axis anisotropic Bragg diffraction comprising an optically anisotropic crystal in which a light beam of incidence travels in a direction making a large angle with the crystalline axis and an ultrasonic wave travels in a predetermined direction. In the acousto-optic filter using a paratellurite crystal, the wavelength of the visible light is tuned by changing the frequency of the ultrasonic wave in a low frequency range below 100 MHz. The ultrasonic power required for driving the acousto-optic filter is about 1/500 that of the so far known acousto-optic filters. The bandwidth of the transmitted light can be changed from several angstroms to several hundred angstroms by selecting the incident angle of the light.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile