Method of and apparatus for controlling deflection of optical be

Details Method of and apparatus for controlling deflection of optical be Method of and apparatus for controlling deflection of optical be

1991-01-18

1992-05-05

LaRoche, Eugene R.

Optical: systems and elements

Optical modulator

Light wave directional modulation

359305, G02F 111, G02F 133

Patent

active

051113325

ABSTRACT:
An AOD driver (27) generates a driving signal of an AOD (11), whose frequency varies in response to a sweep signal and whose amplitude varies in accordance with an amplitude control signal. In an initial stage, a constant signal level is stored in a memory (29) and is supplied to the AOD driver. A laser beam is deflected by the AOD and the light intensity thereof is detected by a photo-sensor (14). A signal representing the light intensity is given to a CPU (33) and a corrected amplitude control signal is generated, which is stored in the memory in place of the original amplitude control signal to control the AOD driver.

REFERENCES:
patent: 4367926 (1983-01-01), Hohki
patent: 4799777 (1989-01-01), Edouard et al.
patent: 4872746 (1989-10-01), Kobayashi

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