Optical: systems and elements – Optical modulator – Light wave directional modulation
Patent
1990-02-22
1992-10-27
Hille, Rolf
Optical: systems and elements
Optical modulator
Light wave directional modulation
359241, 359244, G02F 129, G02F 103, G02F 107
Patent
active
051594862
ABSTRACT:
A light-modulated photoconductor, exhibiting a variable permittivity, provides the basis for various instrumentation devices and methods. In one embodiment, the light-modulated photocondcutor is used as a dielectric between conductive plates to provide a light-modulated capacitor (photocapacitor). One of the conductive plates may be transparent to facilitate application of the modulating light to the photoconductor. The light-modulated capacitor may be used for numerous applications, such as instrumentation used to, e.g., measure the work function of surfaces during processing or as a non-contact voltmeter. In another embodiment, the light-modulated photoconductor is used as a mirror or lens wherein the index of refraction is optically modulated. Such light modulated lens or mirror assembly may be used as a beam steering device, e.g., a solid state infra-red (IR) beam steering device.
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Hille Rolf
Innova Laboratories, Inc.
Limanek Robert
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