Compact, passively athermalized optical assembly

Details Compact, passively athermalized optical assembly Compact, passively athermalized optical assembly

1992-03-31

1993-05-11

Ben, Loha

Optical: systems and elements

Lens

With support

385 33, 372 36, G02B 702

Patent

active

052106500

ABSTRACT:
An optical assembly comprises a light beam source, a collimating lens, and a passive thermally-compensated structure. Concentric rings of dissimilar material are supported by a baseplate and arranged to support a flexure plate at a predetermined distance above the baseplate. The collimating lens is mounted on the flexure plate. A difference in the thermal coefficient of expansion of the rings is chosen so that the flexure plate moves to compensate for thermal shifts in system focal length, while maintaining radial and angular alignment of the lens relative to the laser diode source, so as to provide controlled axial movement of the collimating lens.

REFERENCES:
patent: 1325936 (1919-12-01), Fouasse
patent: 4525745 (1985-06-01), Ghaem-Maghami et al.
patent: 4656635 (1987-04-01), Baer et al.
patent: 4730335 (1988-03-01), Clark et al.
patent: 4861137 (1989-08-01), Nagata
patent: 4993801 (1991-02-01), Sarraf

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