Reflector device

Details Reflector device Reflector device

1992-05-04

1995-12-19

Shafer, Ricky D.

Optical: systems and elements

Mirror

Including specified control or retention of the shape of a...

359848, 359849, G02B 508, G02B 7182

Patent

active

054773938

ABSTRACT:
A reflector which is formed of three or more of reflector modules (called stacks) arranged in arrays and bonded to each other, the stacks being arranged to average the distribution of thermal deformations thereof in terms of inhomogeneity among the stacks in average coefficient of linear expansion, thereby suppressing deformation and deterioration of image-forming performance quality of the reflector under varying temperature conditions. The stacks are arranged in order of the magnitude of values of average coefficients of linear expansion possessed by said stacks so that a thermal deformation pattern produced is a relatively simple pattern, there is provided a reflector device in which correction of thermal deformation can be made by a few actuators.

REFERENCES:
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patent: 4825062 (1989-04-01), Rather et al.
patent: 4875764 (1989-10-01), Marino et al.
patent: 5109349 (1992-04-01), Uldch et al.
patent: 5329407 (1994-07-01), Sasaki et al.
Albertinetti et al., "Discrete Actuator Deformable Mirror", SPIE vol. 179, Adaptive Optical Components 11; 1979, pp. 11-16.
Scott; "Electrooptics in Space Operation and Research", IEEE Spectrum; Jan. 1966, pp. 85-88.
Malvsck; "Theoretical Elastic Deformations of the Steward Observatory 230-cm and the Optical Sciences Center 154-cm Mirrors", Applied Optics; vol. 11, No. 3, Mar. 1972, pp. 575-584.
Krim et al., "Accommodating CTE Discontinuities in a ULE Mosaic Mirror"; Advanced Technology Optical Telescopes IV; 1990, pp. 605-614.

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