Method and system for controlling the position of a beam of...

Details Method and system for controlling the position of a beam of... Method and system for controlling the position of a beam of...

2011-08-09

2011-08-09

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

Reexamination Certificate

active

07994460

ABSTRACT:
An method and system for laser beam tracking and pointing is based on a conventional position sensing detector (PSD) or quadrant cell but with the use of amplitude-modulated light. A combination of logarithmic automatic gain control, filtering, and synchronous detection offers high angular precision with exceptional dynamic range and sensitivity, while maintaining wide bandwidth. Use of modulated light enables the tracking of multiple beams simultaneously through the use of different modulation frequencies. It also makes the system resistant to interfering light sources such as ambient light. Beam pointing is accomplished by feeding back errors in the measured beam position to a beam steering element, such as a steering mirror. Closed-loop tracking performance is superior to existing methods, especially under conditions of atmospheric scintillation.

REFERENCES:
patent: 4556964 (1985-12-01), Trethewey
patent: 5004901 (1991-04-01), Yoshimoto et al.
patent: 5068540 (1991-11-01), Tsuji
patent: 5552883 (1996-09-01), Busch-Vishniac et al.
patent: 5790291 (1998-08-01), Britz
patent: 6901220 (2005-05-01), Carlson
patent: 7072591 (2006-07-01), Smith
patent: 2003/0067657 (2003-04-01), Dimmler
patent: 2005/0069325 (2005-03-01), Cicchiello
patent: 2007/0030067 (2007-02-01), Brueske
patent: 1158704 (2003-04-01), None
patent: 1166469 (2005-08-01), None

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