Optical receiver for modulated light

Details Optical receiver for modulated light Optical receiver for modulated light

1995-06-06

1996-10-22

Chin, Wellington

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

357172, 250361R, 250368, H04B 1006

Patent

active

055683045

ABSTRACT:
An optical receiver for modulated light includes an optical antenna (12) having fluorescent material (18) dispersed therein, and an optoelectrical demodulator (14) for demodulating the modulated light. The optical antenna (12) is formed of a filter material which is transparent to wavelengths equal to or longer than a predetermined wavelength and absorptive to wavelengths shorter than the predetermined wavelength. Also, the optical antenna (12) has a coating (20) of a filter material which is transparent to wavelengths equal to or shorter than the predetermined wavelength, and reflective to wavelengths longer than the predetermined wavelength. Thus, the optical antenna (12) acts on a narrow-pass band filter. Since the fluorescent material emits light at a longer wavelength than the received light, the emitted light is reflected internally to impact on the optoelectrical demodulator (14).

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Technical Information, Color Lumogen.RTM. F Collector dyes BASF.

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