| 摘要 |
Apparatus for filtering a wavelength of light includes a variable polarization rotator for supplying linearly polarized input light at a prescribed angle of polarization, a cholesteric liquid crystal variable dispersion device for rotating the plane of polarization of the plane polarized light from the variable polarization rotator an amount that is a function of the wavelength of such input light, and analyzer for blocking transmission of that light which is output by said variable dispersion device and has a plane of polarization which is crossed relative to the axis of polarization of the analyzer, while transmitting at least part of the light which does is not plane polarized in a direction that is crossed relative to the analyzer.
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