MEMS arrays for deformable mirrors

Raji Krishnamoorthy; Thomas G. Bifano

doi:10.1117/12.220931

13 September 1995 MEMS arrays for deformable mirrors

Raji Krishnamoorthy, Thomas G. Bifano

Proceedings Volume 2641, Microelectronic Structures and Microelectromechanical Devices for Optical Processing and Multimedia Applications; (1995) https://doi.org/10.1117/12.220931
Event: Micromachining and Microfabrication, 1995, Austin, TX, United States

Abstract

A new class of silicon-based deformable mirror for use in optical applications such as adaptive optical systems and optical correlators is being built. The mirror will be a massively parallel system of electrostatically controlled, interconnected microactuators that can be coordinated to achieve precise actuation and control at a macroscopic level. The deformable mirror system described here will be made up of a planar array of 400 electrostatically actuated actuators, which actuate a laterally continuous mirror at discrete points, resulting in surface-normal deflection of up to 4 micrometers . Several generations of single actuators as well as arrays of actuators with a mirror sheet over them have been designed, fabricated, and tested. Deflection characteristics and pull-in behavior of the actuators have been closely studied. Tests for yield, reliability, resolution, and frequency response have given optimistic results. Numerical models of the system have been developed and results from the numerical simulations agree well with experimental results.

Citation Download Citation

Raji Krishnamoorthy and Thomas G. Bifano "MEMS arrays for deformable mirrors", Proc. SPIE 2641, Microelectronic Structures and Microelectromechanical Devices for Optical Processing and Multimedia Applications, (13 September 1995); https://doi.org/10.1117/12.220931

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