Stephen P Callaghan

US Patent:

45510210, Nov 5, 1985

Filed:

Mar 1, 1982

Appl. No.:

6/353713

Inventors:

Stephen P. Callaghan - Minneapolis MN
Timothy J. Callaghan - Minneapolis MN
Harry A. Gustafson - Minneapolis MN
Wah L. Lim - Anaheim CA

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01C 1964

US Classification:

356350

Abstract:

A discriminant apparatus for laser angular rate sensors which provides an output signal related to a selected weighted vectorial sum of the coupling of energy between counterpropagating waves traveling about a closed-loop path. The discriminant apparatus is utilized in a closed-loop control system for minimizing the lock-in rate of the sensor and/or maintaining and selecting scale factor linearity.

US Patent:

48263206, May 2, 1989

Filed:

May 24, 1985

Appl. No.:

6/737978

Inventors:

Stephen P. Callaghan - Minneapolis MN
Joseph E. Killpatrick - Minneapolis MN
Wesley C. Sewell - Dunedin FL

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01C 1964

US Classification:

356350

Abstract:

Readout signals of a dithered ring laser angular sensor are processed by a signal combining circuit which forms part of a closed-loop dither signal remover scheme. The output of the signal combining circuit is demodulated as a function of the dither applied to the ring laser sensor and subsequently utilized to control a correction signal. The signal combining circuit combines the readout signal and the correction signal to yield an output signal stripped of substantially any dither signal components.

US Patent:

45824290, Apr 15, 1986

Filed:

Apr 6, 1983

Appl. No.:

6/482665

Inventors:

Stephen P. Callaghan - Minneapolis MN

Assignee:

Honeywell - Minneapolis MN

International Classification:

G01C 1964

US Classification:

356350

Abstract:

Disclosed is a readout apparatus for obtaining single beam and double beam signals for a ring laser angular rate sensor.