Accession Number : ADD003541

Title :   Variable Power Attenuator for Light Beams.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Brown,Ray Bernard

Report Date : 14 Feb 1977

Pagination or Media Count : 13

Abstract : The invention pertains to an improved variable light beam power attenuator which uses a flat mirror and a parabolic mirror fixed in a suitably movable structure; linear movement of which varies the diameter of a beam of light transmitted to a pinhole of pre-determined diameter. A second parabolic mirror and second flat mirror are provided to re-collimate the light received from the pinhole and to transmit an output light beam on the optical axis of the input light beam. A servo-controlled, motor drive system is provided to implement the variable attenuation feature.

Descriptors :   *Patent applications, *Attenuators, *Laser beams, *Light, Optical equipment, Mirrors

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE