Christopher R Dehainaut

51795337, Jan 12, 1993

Jul 31, 1989

7/387082

Jeff A. Bullington - Albuquerque NM
Sylvia D. Mancha - Albuquerque NM
Christopher DeHainaut - Albuquerque NM

Radiant Technologies - Albuquerque NM

G11C 1122
G11C 1142

365110

An improved read/write optical disk is disclosed which is capable of being rewritten more than 10. sup. 6 times. The disk utilizes a storage medium in which data is stored by causing a localized region of the storage medium to assume one of two states. The two states can be converted from one to another by the application of electric fields to the localized region of the storage medium. The localized region in question is selected by illuminating an area on an addressing layer directly above the region in question with light. The preferred embodiment utilizes a lead lanthanum zirconate titanate material for the storage medium.

49813544, Jan 1, 1991

Mar 13, 1989

7/322380

Christopher R. DeHainaut - Albuquerque NM
John D. Gonglewski - Albuquerque NM
Dennis C. Duneman - Albuquerque NM
Morten Jenks - Corrales NM
David F. Holmes - Albuquerque NM

The United States of America as represented by the Secretary of the Air
Force - Washington DC

C01C 100
G01J 400

356141

An electrooptical sensor system directly measures the angle between two nearly parallel collimated laser beams. After focussing with a positive lens, the beams pass through a photoelastic modulator, a quarter wave retardation plate, and two polarizers. The beams then hit a lateral cell position sensor. Electrical signals from the lateral cell are processed with special electronics to yield a voltage which is proportional to the angular difference between the two beams. The sensor measures extremely small angles and operates at a high bandwidth. Its primary application is in the control of phased array optical telescopes.

46395865, Jan 27, 1987

Feb 6, 1985

6/698962

Janet S. Fender - Albuquerque NM
Salvatore J. Cusumano - Champaign IL
Robert R. Butts - Colorado Springs CO
Christopher R. DeHainaut - Albuquerque NM

The United States of America as represented by the Secretary of the Air
Force - Washington DC

G01J 120
G01B 902

250201

An apparatus and technique are described for phasing the outputs of a multiplier telescope array used as a laser transmitter. The technique uses samples of the transmitted beams to control optical path lengths through the separate telescopes so that the beams add coherently at the receiver. The phasing concept is applicable both to systems which provide inputs to the multiple telescopes by dividing a single laser beam and to systems in which the inputs to the telescopes and multiple, phase-locked laser beams. The approach is also compatible with single line and multi-line lasers, and it does not entail stringent alignment requirements. The concept uses a procedure to find the zero optical path difference condition and to effect fine control of the optical path lengths through the different telescopes. Algorithms are described for estimating the phase mismatch from focal plane measurements.