Variable Power Attenuator for Light Beams.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 14, 1977
- Accession Number
- ADD003541
Entities
People
- Ray Bernard Brown
Organizations
- United States Department of the Navy