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. 09, 1985
Filed:
Sep. 21, 1981
Lauren M Peterson, Ann Arbor, MI (US);
The Environmental Research Institute of Michigan, Ann Arbor, MI (US);
Abstract
A method and device for amplitude modulating a high powered beam of infrared radiation at frequencies in the megahertz range are disclosed. A laser is used to generate a beam of 4-40 watts of power and the beam is passed through as acousto-optical crystal having an acoustic transducer on one surface. A standing acoustical wave in the crystal is provided by a low powered drive signal at a frequency of one to ten megahertz. The beam is efficiently modulated by the standing wave at exactly twice the frequency of the drive signal. The device incorporates a heat sinking arrangement which serves to preclude deleterious action of divergent acoustical waves generated in the crystal, as well as to provide excellent removal of thermal energy.