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QW_POLAR

Controls the Quarter Wave Plate.

Format: QW_POLAR <function> <parameter>

Examples: QW_POLAR MOVE IN
QW_POLAR ROTATE 25
QW_POLAR ANGLE 1800
QW_POLAR STOP ROTATE

Synonyms: QWIN QW_POLAR MOVE IN
QWOUT QW_POLAR MOVE OUT
QWP QW_POLAR ANGLE
QWPROT QW_POLAR ROTATE

Units: Angles are specified in units of a tenth of a degree.
Rotation rates are specified in units of a tenth of a Hz.

Range: Angle in range 0 to 3600.
Rotation rate in range -7 to 118.

Comments: function can have the values ROTATE, ANGLE, MOVE or STOP.
The parameter for QW_POLAR ROTATE is a rotation rate in units of a tenth of a Hz, this sets the plate in continuous rotation.
The parameter for QW_POLAR ANGLE is an angle in units of a tenth of a degree, this sets the plate to a fixed angle.
The parameter for QW_POLAR MOVE can be IN or OUT, this moves the plate in or out.
The parameter for QW_POLAR STOP can be ROTATE or MOVE, this stops the plate rotating or moving.
Notes:- The wave plate must be in before continuous rotation is started; and the if the wave plate is rotating it must be stopped before sending it to a fixed angle.