Controlled color light source

Details Controlled color light source Controlled color light source

1985-10-25

1987-09-08

LaRoche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

315155, G01J 132

Patent

active

046926070

ABSTRACT:
A controlled color light source including a lamp for projecting a beam of light, a power supply for energizing the lamp and a light conduit for sampling a portion of the light emitted from the lamp. A beam splitter is arranged to split the light from the conduit into two channels, and a pair of photo detectors, one for each channel are arranged to receive the light from the conduit via the beam splitter. A divider circuit has a pair of inputs and an output, the inputs being connected to the two photo detectors and an output circuit is connected to the output of the divider circuit for providing an output signal which is proportional to the color of light captured by the conduit.

REFERENCES:
patent: 4308456 (1981-12-01), Van Der Gaag et al.
patent: 4417140 (1983-11-01), Adolfsson et al.
patent: 4449821 (1984-05-01), Lee

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