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. 17, 1984
Filed:
Jun. 17, 1981
Frederick W Freyre, West Wantagh, NY (US);
Hazeltine Corporation, Commack, NY (US);
Abstract
Apparatus for translating the position of a coherent beam of light using one or more acousto-optical cells. The beam is incident upon an acousto-optical cell through which acoustic waves of a selected frequency are propagating. These acoustic waves cause periodic variations in the refractive index of the cell which act to diffract and frequency shift the beam by amounts which are determined by the frequency of the acoustic wave. The once-diffracted beam is reflected back through the acosto-optical cell in the opposite direction, which causes a diffraction and frequency shift which are equal and opposite to the initial diffraction and frequency shift. By varying the frequency of the propagating waves, the final output beam of coherent light can be translated without a frequency shift. Also disclosed are a dual, identical Bragg cell embodiment for translating a light beam and dual Bragg cells having differing acoustic propagation velocities for deflecting a light beam.