Optical cavity systems

Details Optical cavity systems Optical cavity systems

1987-10-15

1989-04-11

Evans, F. L.

Optics: measuring and testing

Angle measuring or angular axial alignment

Alignment of axes nominally coaxial

356352, G01B 1126

Patent

active

048200425

ABSTRACT:
Method and apparatus for mode coupling a light beam into an optical cavity having a cavity axis, effect reflection of light of that beam with a mirror along a geometric ray originating laterally of the cavity axis. The mirror is rigidly interconnected with the cavity and is adjusted until the geometric ray coincides with the light beam. That geometric ray is retained in space while moving the optical cavity so that the cavity axis moves translatorily relative to the retained geometric ray, until the cavity axis coincides with the retained geometric ray and thereby with the light beam. Where an optical cavity is located in an oven, first temperature variations of a wall of that oven and second temperature variations of the cavity are sensed, and energization of the oven is controlled more rapidly in response to these first temperature variations, than in response to those second temperature variations.

REFERENCES:
patent: 3734627 (1973-05-01), Edwards
patent: 4142798 (1979-03-01), Barbee, Jr.
patent: 4298281 (1981-11-01), Schare
patent: 4387462 (1983-06-01), Markus
C. Fabre et al., Ultrahigh-Finesse Optical Cavities, Optics Letters, 11 (Jun. 1986), 365-367.
The Newport Catalog No. 100, (1987), D-18 and 19.

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