The USHM is a self-compensating mirror that is totally insensitive to position and movement, such as tilt or rotation. Parallel incident light that hits the USHM will be returned with great accuracy to the light source, regardless of the USHM’s physical orientation. The USHM is an improved hard mount solidly connecting the Retroreflector to the next assembly. It is vacuum compatible and can be positioned about the permanently connected post in any orientation, providing greater freedom for different mounting configurations.
Stability and Accuracy
The USHM offers properties, which enables it to perform well in critical applications, such as military, aerospace, or any OEM requirements. It is especially well suited for interferometers where high stability of the OPD and the concentricity of the apex with respect to the mounting thread are critical requirements. USHMs can also be provided in matched pairs for better modulation.
Coatings
Standard USHM mirror coatings are aluminum, silver and gold, in both bare metal and with protective overcoats. All protected PLX coatings meet MIL-SPEC durability and adhesion requirements. Unprotected metallic coatings are especially suited to interferometric applications. Custom coatings are available.
Custom configurations for specialized applications
PLX engineers can create a custom USHM for your application. Potential variations include: smaller and larger apertures; special performance glass; modified mounts to meet your interface; super-critical accuracies; dielectric mirror coatings for high-powered lasers; and units able to withstand military and space environments.
Specifications
| Cat. No. |
Clr. Aper.
(in/mm) |
Beam*
Deviation (arc.sec.) |
Exiting**
Wavefront (p.v.633nm) |
WT.***
(gr.) |
Diagram |
| USHM-10-1 |
1.0/25 |
1.0 |
0.15 |
26 |
Click here |
| USHM-10-2 |
1.0/25 |
2.0 |
0.25 |
26 |
| USHM-10-5 |
1.0/25 |
5.0 |
0.60 |
26 |
| USHM-10-10 |
1.0/25 |
10.0 |
1.25 |
26 |
| USHM-10-30 |
1.0/25 |
30.0 |
3.50 |
26 |
|
| USHM-15-05 |
1.5/38 |
0.5 |
0.10 |
43 |
Click here |
| USHM-15-1 |
1.5/38 |
1.0 |
0.20 |
43 |
| USHM-15-2 |
1.5/38 |
2.0 |
0.35 |
43 |
| USHM-15-5 |
1.5/38 |
5.0 |
0.90 |
43 |
| USHM-15-10 |
1.5/38 |
10.0 |
1.75 |
43 |
| USHM-15-30 |
1.5/38 |
30.0 |
5.25 |
43 |
|
| USHM-20-05 |
2.0/50 |
0.5 |
0.15 |
120 |
Click here |
|
| USHM-20-1 |
2.0/50 |
1.0 |
0.25 |
95 |
Click here |
| USHM-20-2 |
2.0/50 |
2.0 |
0.50 |
95 |
| USHM-20-5 |
2.0/50 |
5.0 |
1.25 |
95 |
| USHM-20-10 |
2.0/50 |
10.0 |
2.50 |
95 |
| USHM-20-30 |
2.0/50 |
30.0 |
7.00 |
95 |
|
| USHM-25-05 |
2.5/63 |
0.5 |
0.25 |
140 |
Click here |
|
| USHM-25-1 |
2.5/63 |
1.0 |
0.35 |
105 |
Click here |
| USHM-25-2 |
2.5/63 |
2.0 |
0.60 |
105 |
| USHM-25-5 |
2.5/63 |
5.0 |
1.50 |
105 |
| USHM-25-10 |
2.5/63 |
10.0 |
3.00 |
105 |
| USHM-25-30 |
2.5/63 |
30.0 |
9.00 |
105 |
|
| USHM-50-05 |
5.0/127 |
0.5 |
0.45 |
681 |
Click here |
|
| USHM-50-1 |
5.0/127 |
1.0 |
0.65 |
681 |
Click here |
| USHM-50-2 |
5.0/127 |
2.0 |
1.25 |
681 |
| USHM-50-5 |
5.0/127 |
5.0 |
3.00 |
681 |
| USHM-50-10 |
5.0/127 |
10.0 |
6.00 |
440 |
| USHM-50-30 |
5.0/127 |
30.0 |
18.0 |
440 |
Choose the coating you need:
COATING SPECIFICATION CHART
* Beam Deviation is the maximum deviation from parallelism, expressed in second of arc, of any single return beam from any of the 6 sub-apertures of the retroreflector, when the retroreflector is fully-illuminated.
** Exiting Wavefront is the resultant maximum peak-to-valley wavefront deformation from a fully-illuminated retroreflector, where lambda = 633nm.
*** Certain high accuracy models may be heavier than indicated here. Check with us for actual weight. |
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