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The Cryo Tip / Tilt / Piston Stage (CTTPS) accepts 1/2″ or 1” optical elements and can be operated in a cryo-vacuum environment. It is actuated with JPE’s Cryo Linear Actuators (CLA). Play of the tip / tilt / piston functionality is eliminated by built-in preload springs. Lateral position is not achieved via traditional v-groove constructions, but by using a deformable metal membrane. This feature not only eliminates play but also the erratic motion seen in the traditional designed tip tilt piston stages. The optics are clamped from the side with a single spring loaded screw.
|Type of motion||-||Tip / Tilt / Piston|
|Optical diameter||mm (inch)||12.7 (1/2)||25.4 (1)|
|Open optical aperture diameter||mm||11.5||21|
|System tip / tilt range w.r.t optics centre||deg||± 7.2||± 5.6|
|System piston range||mm||± 1.5|
|Main construction material||-||Titanium, stainless steel|
Specifications are given for individual actuators unless otherwise mentioned.
See interface drawing for transformation matrix from actuator outputs to system motion.
|Coarse range||mm||± 1.5|
|Coarse step size @ 293 K||nm||5-25|
|Coarse step size @ 4 K||nm||1-5|
|Coarse actuator spindle pitch||mm/turn||0.25|
|Controller/driver||-||CAB-230(115), CADM(2), MCM|
HV rated positioners can realistically be considered compatible with pressures as low as 1E-8 mbar. Lower pressures can be achieved by prolonged baking of positioners in vacuum at 100-150 deg C, depending on the type of positioner. Upon request JPE can provide such service at additional costs.
CTTPS1/2 /HV: Cryo Tip/Tilt/Piston Stage 1/2”
CTTPS1 /HV: Cryo Tip/Tilt/Piston Stage 1”
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