Frequency stabilized light source

Details Frequency stabilized light source Frequency stabilized light source

1992-05-05

1994-02-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

372 32, G01J 132

Patent

active

052869660

ABSTRACT:
A light source which is stabilized in frequencies at uniform intervals comprises a light source 5 whose light frequency is varied with a signal from a reference signal source 4; a frequency detector 6 for detecting the frequency of the output of the light source 5, the cycles of the said frequency detector being the same as the uniform intervals; a comparator 2 for comparing the output of the frequency detector 6 and the output of the reference light source 1; and a switch 3 having as its input the output of the comparator 2 for inputting the output to the light source 5, said switch being so operated that when the frequency of the light source 5 is to be changed the switch is opened and the output of the reference signal source 4 is changed to set the output frequency of the light source 5 near the desired frequency and then the switch 3 is closed.

REFERENCES:
patent: 4583228 (1986-04-01), Brown et al.
patent: 4947398 (1990-08-01), Yasuda et al.
patent: 5068864 (1991-11-01), Javan
patent: 5119391 (1992-06-01), Maeda et al.

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