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
Distribution Statement : APPROVED FOR PUBLIC RELEASE