Shutter and iris combined automatic exposure device
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United States of America Patent
Stats
-
Sep 14, 1993
Grant Date -
N/A
app pub date -
Dec 26, 1991
filing date -
Nov 28, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic exposure device having an exposure sensor and a microprocessor includes a plurality of shuris wings each having a window of a given shape to be movable in respect to each other a motor controlled by the microprocessor for driving the movement of the plurality of shuris wings, an encoder disc for sensing a state of revolution of the motor, a counter for transmitting the state of revolution to the microprocessor by checking an encoder value recorded in the encoder disc, and a ROM table connected to the microprocessor for storing the encoder value and an exposure value corresponding to the encoder value.
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