Accession Number : ADD011273

Title :   Dual-Secondary Mirror Cassegrain Optical System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Christy,O D

Report Date : 27 Mar 1984

Pagination or Media Count : 6

Abstract : The dual-secondary mirror optical system utilizes, in principle, the Cassegrain optical system. An apertured, single, primary mirror is coaxially aligned with two secondary mirrors to provide coaxial transmit and receive optical paths. Separation of the optical paths is in radial distance from the central optical axis. An apertured secondary mirror in conjunction with the primary mirror detects the transmitted beam, providing a hollow expanded output beam. The other secondary mirror in conjunction with the primary mirror directs received radiation coaxially within and spatially separated from the hollow transmitted beam, providing dual transmit receive operation. (Author)

Descriptors :   *Patents, *Cassegrainian optical systems, *Mirrors, Laser beams, Optical properties, Paths, Axes, Range(Distance), Cassegrain telescopes, Cassegrain antennas

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE