Arrangement for correcting the position of a laser beam guided b

Details Arrangement for correcting the position of a laser beam guided b Arrangement for correcting the position of a laser beam guided b

1985-02-13

1987-04-21

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

219121LV, G05D 312, G02B 1706, B23K 2604

Patent

active

046599169

ABSTRACT:
The invention is directed to an arrangement for correcting the position of a laser beam guided by means of an articulated optical system. This system includes a position-sensitive detector at its output end for generating a signal which is passed to an adjustable mirror arranged on the input end. The adjustable mirror compensates for an excursion of the laser beam occurring as a result of faults in the guide means and bearings of the articulated arm. Prior to entering the articulated optical system, the laser beam or parallelly guided pilot beam is modulated with respect to the beam direction with a small amplitude by another adjustable mirror. The detector signal component corresponding to the modulation frequency is passed to an electronic circuit which determines the directional relationships between the excursion of the laser beam at the output of the articulated arm and the follow-up movement of the adjustable mirror for deflecting the beam. This determination is achieved independently of the amount of rotation of the rotational bearings.

REFERENCES:
patent: 3902036 (1975-08-01), Zaleckas
patent: 4114180 (1978-09-01), Kayanuma
patent: 4271334 (1981-06-01), Yardy
patent: 4279472 (1981-07-01), Street
patent: 4349732 (1982-09-01), Whitby et al.
patent: 4429211 (1984-01-01), Carstens et al.
patent: 4482987 (1984-11-01), Okada et al.
patent: 4535431 (1985-08-01), Bricot et al.

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