Bouncing mode operated scanning micro-mirror

Optical: systems and elements – Optical modulator – Light wave temporal modulation

Reexamination Certificate

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C359S291000, C359S290000, C359S223100

Reexamination Certificate

active

07042613

ABSTRACT:
A MEMS apparatus for scanning an optical beam comprises a mirror operative to perform a rotational motion to a maximum rotation angle around a mirror rotation axis, and a bouncing mechanism operative to provide a bouncing event and to reverse the rotational motion. The bouncing event provides the mirror with a piecewise linear response to actuation by intrinsically nonlinear electrostatic forces. The bouncing mechanism includes an element chosen to impart an overall nonlinear stiffness to the system and is selected from the group of elements consisting of a bouncer and a pre-curved nonlinear stiffness element.

REFERENCES:
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“Tuning the dynamic behavior of parametric resonance in a micromechanical oscillator” W Zhang et al,Applied Physics Letters82(1) pp. 130-132, 2003.
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“A reasonatly excited 2D-micro-scanning-mirror with large deflection” H Schenk et al,Sensors and Actuators A-Physical89(1-2) pp. 104-111, 2001.
“Design and Analysis of a micro-scanning mirror” I. Bucher, inProc. of 29thIsrael Conference on Mechanical Engineering, May 12-13, 2003, Technion, Haifa, Israel.
“Bouncing mode electro-statically actuated scanning micro-mirror for video applications” by V. Krylov and D.I. Barnea, submitted for publication inSmart Materials and Structures, Mar. 2004.
“Overview of Light Beam Scanning Technology for Automotive Projection Displays” Lippert et al Microvision Inc, www.mvis.com.

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