Newport FSM-300, Руководство пользователя

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Fast Steering Mirror Technology 15
position. One downside to stiff flexures is the increased current necessary to
move the mirror. The FSM series of mirror heads is designed around a small
spring constant to keep the current and the consequential heating to a
minimum. As expected, the FSM in power-off status is greatly affected by
external effects such as gravity and vibrations. This power-off susceptibility
must be taken into consideration when designing the mirror into an integrated
system. Proper turn-on and turn-off procedures should be followed to ensure
that light is only applied to the mirror when it is powered and under the
control of either internal or external position feedback.
A position transducer is included in the FSM mirror head to provide position
feedback with reference to the support frame. This transducer senses the
angle of the mirror carrier and transfers this information to the position
sensor electronics board located within the mirror head. This board processes
the position information and outputs a differential voltage, A-B. This signal is
sent to the FSM-CD300B controller/driver to provide the appropriate
feedback current to the voice coils.