Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1986-08-12
1987-11-17
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
219121LU, 356152, G05D 312, B23K 2604
Patent
active
047075961
ABSTRACT:
At its exit end, an articulated optical system contains a triple mirror which reflects part of the laser beam into itself and back to a detector disposed in the vicinity of the entry of the articulated optical system. The detector signal is delivered to an adjusting mirror also disposed at the entry of the articulated optical system. The adjusting mirror compensates for drifting of the laser beam caused by errors in the telescopic guides and bearings of the articulated arm. Since the laser beam, after reflection at the triple mirror, is returned once again by means of all the movable elements of the articulated arm, the directional association between the displacement measured by the detector and the follow-up adjusting movement of the adjusting mirror remains independent of the amount of rotation in the joints.
REFERENCES:
patent: 4117319 (1978-09-01), White, III
patent: 4129775 (1978-12-01), O'Meara
patent: 4349732 (1982-09-01), Whitby et al.
patent: 4473074 (1984-09-01), Vassiliadis
patent: 4576480 (1986-03-01), Travis
patent: 4618759 (1986-10-01), Muller et al.
patent: 4659916 (1987-04-01), Muller et al.
Carl-Zeiss-Stiftung
Ottesen Walter
Shami Khaled
Westin Edward P.
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