Patent ID: 7529016
Filing Date: 2009-05-05
Classification: G02B

Abstract:
1. A tiltable micromirror apparatus, comprising: a substrate; a light-reflective platform tiltably suspended above the substrate by a first torsion spring which is attached to both the platform and the substrate; a second torsion spring located alongside of the first torsion spring and connected thereto by a connecting member which is suspended above the substrate by the first and second torsion springs, with the second torsion spring further being attached to the substrate at two opposite ends of the second torsion spring; and an electrostatic actuator located below the light-reflective platform and operatively connected to tilt the light-reflective platform in response to an applied voltage, with the first and second torsion springs in combination providing a non-linear restoring force in opposition to tilting of the light-reflective platform by the electrostatic actuator.