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The OFV-353 sensor head is particularly suitable for applications in which the
sensor head is subjected to some mechanical stress (shaking etc.). If the
front lens is fixed, the focus remains stable for a long period of time.
The focus fixing mechanism is operated by the knob BRAKE ON/OFF. Pro-
ceed as follows:
1. To
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the focus, press the knob BRAKE ON/OFF into the front panel until
it stops (BRAKE ON).
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2. To
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the fixing mechanism, pull the knob BRAKE ON/OFF out until
it clicks into place (BRAKE OFF). Then turn the focusing ring until the
adjustment mechanism clicks into place. You can now focus the laser
beam as described in section 5.4.
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If the sensor head is being transported, the shock absorbing feet of the hous-
ing do not provide sufficient protection. For this reason, the interferometer
must additionally be secured with a transport safety mechanism.
To activate the transport safety mechanism, you proceed as follows:
1. Turn the screw on the back of the sensor head to position TRANSPORT.
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2. Only set the transport safety mechanism to position MEASUREMENT
when you are making measurements or when the system is kept in one
and the same position.
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$OZD\V activate the transport safety mechanism EH IRU H moving the sensor head!
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