Iris servo apparatus
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United States of America Patent
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-
Oct 11, 1983
Grant Date -
N/A
app pub date -
Apr 15, 1981
filing date -
Apr 28, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An iris servo apparatus comprises a first servo system (iris servo) and a second servo system (AGC circuit). When the first servo system is saturated, which state corresponds to full opening of iris, the second servo system automatically starts. That is, the second servo system does not effect gain control until the level of an output signal of the first servo system becomes sufficiently high. Switching the first servo system to the second servo system or vice versa is automatically conducted.
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