Monomorph thin film actuated mirror array

Details Monomorph thin film actuated mirror array Monomorph thin film actuated mirror array

1995-04-17

1998-01-20

Ben, Loha

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359291, 359221, 359224, 310328, 310366, G02B 2600

Patent

active

057106576

ABSTRACT:
A thin film actuated mirror is disclosed having a substrate, a deformable structure mounted to the substrate, and a mirror surface interconnected to the deformable structure such that the mirror surface tilts in response to the deformation of the deformable material layer. The deformation occurs due to the effective strain gradient across the monomorph thickness which is accomplished by varying the electric field across the thickness or the strain parameter across the thickness. The deformable structure includes an active material layer fabricated from a semi-conductive ferroelectric ceramic material and two metal electrodes, each of the electrodes being mounted on opposing surfaces of the active material layer, wherein an electrical signal applied across the active material layer between the electrodes causes deformation of the active material layer. Alternatively, the active material layer may be fabricated from two layers, an upper layer of an active piezoelectric material and a lower layer of an inactive material.

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patent: 5455477 (1995-10-01), Sano et al.
patent: 5481396 (1996-01-01), Ji et al.

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