Optical: systems and elements – Mirror – Including specified control or retention of the shape of a...
Patent
1996-02-28
2000-04-11
Spyrou, Cassandra
Optical: systems and elements
Mirror
Including specified control or retention of the shape of a...
359845, 359849, G02B 508, G02B 7182
Patent
active
06048070&
ABSTRACT:
A durable large stroke deformable mirror. In the illustrative embodiment, the mirror (10') includes a faceplate (12') constructed of a first material, and a backplate (14') constructed of a second material different from the first material. The faceplate (12') is connected to the backplate (14') at an interface (16'), and the backplate (14') is connected to a set of actuators (20') capable of inducing large mirror (10') deflections. In a specific embodiment, the first material is chosen for its excellent optical qualities and the second material is chosen for its flexibility and durability, allowing for large mirror (10') deflections. To ensure the durability of the connection at the interface (16'), the faceplate (12') and the backplate (14') have matching coefficients of thermal expansion. In addition, the interface (16') is placed at the neutral axis of the mirror (10') for reducing stresses at the interface (16'). The interface (16') also contains fluid-filled channels (26') for carrying heat away from the mirror (10'), reducing temperature related mirror (10') distortions.
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Lenzen, Jr. Glenn H.
Raytheon Company
Robinson Mark A.
Schubert William C.
Spyrou Cassandra
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