Multiple spectral band opto-mechanical modulator

Details Multiple spectral band opto-mechanical modulator Multiple spectral band opto-mechanical modulator

G - Physics

02

B

88/121

G02B 26/00 (2006.01) G02B 26/08 (2006.01)

Patent

CA 1341533

A multiple spectral band opto-mechanical modulator for obtaining simultaneous but independent modulation of an extended IR source in two distinct wavelength bands comprises in one embodiment a first rotating filter wheel having alternating radial segments of transparent and short wavepass filter material, a second rotating filter wheel having alternating radial segments of transparent and long wavepass filter material, a stationary wheel having alternating radial transparent and opaque segments positioned intermediate the first and second rotating wheels and means for rotating said first and second filter wheels at predetermined frequencies.

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