Optical: systems and elements – Deflection using a moving element – By moving a reflective element
Reexamination Certificate
2011-05-31
2011-05-31
Cherry, Euncha P (Department: 2872)
Optical: systems and elements
Deflection using a moving element
By moving a reflective element
Reexamination Certificate
active
07952783
ABSTRACT:
A scanning beam projection system includes a scanning mirror having a fast-scan axis and a slow-scan axis. Movement on the slow-scan axis is controlled by a slow-scan scanning mirror control system. The control system receives position information describing angular displacement of the mirror. An outer loop of the control system operates in the frequency domain and determines harmonic drive coefficients for a scanning mirror drive signal. An inner loop of the control system operates in the time domain and compensates for a scanning mirror resonant vibration mode at a frequency within the frequency band occupied by the harmonic drive coefficients.
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Brown Margaret K.
Holmes Steve
Jackson Robert J.
McLauchlan Lifford
Mehrubeoglu Mehrube
Cherry Euncha P
Microvision Inc.
Wills Kevin D.
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