Suprema® low wavefront distortion mirror mounts are specifically designed to hold mirrors in a way that will not induce optical distortion. They use an axial three-point mounting method to gently, but securely, hold optics with tight flatness tolerances.
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SU100W-F2K-127 Mirror Mount, Suprema® LWD, 1.0 in, (2) 127-TPI Locking Knob Actuators |
In Stock
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$307 |
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SU100W-F3K-127 Mirror Mount, Suprema® LWD, 1.0 in, (3) 127-TPI Locking Knob Actuators |
In Stock
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$321 |
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With the axial 3-point mounting, because there are twice as many mounting points, the forces that would cause distortion are essentially cut in half, more distributed, and axially opposite to eliminate bending.
Interferometric testing results show the flatness of the mirrors held in these mounts, measure at 0.100 wave PV (peak to valley). Compare this to mirrors held in a mount with a nylon-tipped set screw where the flatness degrades to 0.600 to 0.800 wave PV. An unconstrained 1/10th wave mirror will typically measure 0.090 wave PV.
Actual (not simulated) interferometric testing of our LWD Mirror Mounts demonstrate that the low-stress mirror mounting clamp significantly reduces wave front distortion. In this video, we are testing the Suprema SU100W-F3K low wave front distortion mirror mount.
These SU100W series mounts are equipped our AJS 127-TPI locking adjustment screws. This gives them an angular range of ± 7° and provides a 27% improvement in adjustment sensitivity over competing mounts having 100-TPI adjusters. Better adjustability means faster, easier alignment.
Suprema Low Wavefront Distortion Mirror Mounts use a Flexure Lock built with an AJS bushing. Flexure Locks exert a tangential force on the screw to prevent rotation.
Purpose:
Newport's thermal drift testing of mirror mounts has two purposes: (1) to measure the maximum deflection during a peak temperature shift (after a soaking period) and (2) to measure the shift in position after temperature cycling and return to initial temperature.
Method:
A mirror mount, with mirror installed, was securely fixed to a 1.5"-diameter solid steel pedestal post. This assembly was then placed inside of a climate-controlled environmental chamber and mounted to a stainless steel optical table. Upon fastening to the table, the mirror mount was set to nominal and zeroed to set the initial position. Throughout the test, an independently thermally isolated CONEX-LDS Autocollimator was used to monitor the reflected beam position. After initial alignment adjustments, the mirror mount was left to rest for two hours to allow the internal kinematic forces to reach equilibrium. Then, the mirror mount was subjected to a 10°C increase in temperature for one hour through convection heating. After a thermal soaking period to ensure the mount is sufficiently heated through, the mirror mount was returned to its original temperature, completing a cycle. This temperature cycling process was repeated 10 times over the duration of 62 hours, with deflection during peak temperature and shift after the end of each cycle recorded.
The maximum deflection of the SU100W-F2K-127 mirror mount during peak temperature was 26 µrad in pitch and 4 µrad in yaw, and the shift in reflected beam position after temperature cycling was < 1 µrad in pitch and < 1 µrad in yaw. This demonstrates the mount's excellent thermal properties. Further details are shown in the accompanying graphs.
The maximum deflection of the SU100W-F3K-127 mirror mount during peak temperature was 15 µrad in pitch and 10 µrad in yaw, and the shift in reflected beam position after temperature cycling was < 1 µrad in pitch and < 1 µrad in yaw. This demonstrates the mount's excellent thermal properties. Further details are shown in the accompanying graphs.
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