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:
Dec. 18, 1979
Filed:
Feb. 02, 1976
Myer Geller, San Diego, CA (US);
Daniel E Altman, San Diego, CA (US);
Glidden J Barstow, San Diego, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An electronically controllable, wide angle of view, notch filter operates attenuate predeterminable narrow bandwidth wavelengths of light energy. An enclosure contains a selected material characterized by exhibiting strong quantum mechanical coupling between two determinable energy states of different levels above its ground energy state and also producing radiated emission within the desired narrow bandwidth wavelengths when externally excited to populate the upper of the two determinable energy states. Transparent windows at opposite ends complete the enclosure which is maintained at a desired temperature to vaporize the selected material. Two electrodes, oppositely positioned within the enclosure contiguous to its optical path, are connectable to a source of pulsed electrical energy to generate an electric discharge across the electrodes of sufficient strength to raise the vaporized selected material from its ground energy state to the lower of the two determinable higher energy states, causing selective absorption of predetermined narrow bandwidth wavelengths of light energy under the timed control of electrical actuation.