Constant intensity light source for fiber optic testing

Details Constant intensity light source for fiber optic testing Constant intensity light source for fiber optic testing

1989-08-29

1991-01-08

Mis, David

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Load device irradiating the radiant energy responsive device

315307, 250205, H05B 3702, G01J 132

Patent

active

049838849

ABSTRACT:
A stable fiber optic light source is produced by a supply circuit comprising a current-producing power source 10, a comparing means 20, phase shifter 30, transistor circuit 40, light-emitting diode 50, and a feedback control system. The feedback control system comprises a mixing rod 103 for conveyance of the optical power, a splitter 16 for receiving the optical power from the mixing rod 103 and for splitting the power into fiber optic product portions 62 and 63, and a fiber optic control portion 64 and a detector 70 for sensing the optical power from the fiber optic control portion 64 and for producing, in response thereto, an electrical control signal 105 for control of the power circuit 10.

REFERENCES:
patent: 4135116 (1979-01-01), Smith
patent: 4238707 (1980-12-01), Malissin et al.
patent: 4329625 (1982-05-01), Nishizawa et al.
patent: 4423478 (1983-12-01), Bullock et al.
patent: 4431947 (1984-02-01), Ferriss et al.
patent: 4467246 (1984-08-01), Tanaka et al.
patent: 4894525 (1990-01-01), Kakuta

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