Method and device for aligning an optical transmission and recep

Details Method and device for aligning an optical transmission and recep Method and device for aligning an optical transmission and recep

1997-11-20

2000-08-01

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359172, H04B 1000

Patent

active

060975229

ABSTRACT:
The method and the device of the present invention are used for aligning a transmitted and a received beam in satellite connections for the purpose of establishing and maintaining a connection between satellites by optical communications means. The device includes a control unit (3), to which a coarse adjustment unit (7), a fine adjustment unit (6), and a lead correction unit (8) are parallel connected. The parameters of the received beam (4) and also the angular values of the transmitted beam (15, 16) can be corrected by means of various summing members (5, 12, 14) in such a way that precise tracking of the received beam is achieved.

REFERENCES:
patent: 5142400 (1992-08-01), Solinsky
patent: 5475520 (1995-12-01), Wissinger
patent: 5592320 (1997-01-01), Wissinger
patent: 5710652 (1998-01-01), Bloom et al.
U.S. application No. 08/882,266, Oerlikon-Contraves, filed Jun. 25, 1997.
T.T. Nielson, "Pointing, Acquisition and Tracking System for the Free Space Laser Communication System, SILEX", SPIE vol., 2381 pp. 194-205.
G. Baister et al., "The SOUT Optical Intersattellite Communication Terminal", IEE Proceedings Optoelectronics, vol. 141, No. 6 (1994) pp. 345-355.
Shiratama et al., "Challenge for Optical Inter-Satellite Communications", NEC Res. & Develop., vol. 37, No. 1, Jan., 1996 pp. 52-59.
Baister et al., "Pointing, Acquisition and Tracking for Optical Space Communications", Electronics & Communication Engineering Journal, vol., 6 Dec. 1994, pp. 271-280.

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