Partial reflectors are commonly used as laser output couplers or beam attenuators.
For your convenience, II-VI maintains commonly used coatings and substrate radii of curvature in inventory. For available special substrate sizes and coatings, please contact a II-VI sales representative for a quotation.
Laser output couplers often require a slightly wedged substrate to eliminate interference from multiple reflections inside the component. If you require a specific wedge value, please specify this when ordering.
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Standards |
Dimensional Tolerances |
Diameter
Thickness (plano)
Thickness (radiused) |
+0.000”-0.005”
+0.005”-0.010”
+/-0.010” |
Parallelism |
Plano
Radiused, Diameter < 1”
Radiused, Diameter >= 1” |
<= 3 arc minutes
<= 10 arc minutes
<= 5 arc minutes |
Clear Aperture (polished) |
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90% of diameter |
Surface Figure (power/irregularity) at 0.63µm |
Plano
Radiused |
1 fringe/0.5 fringe
(varies depending upon radius) |
Surface-Dig |
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20-10 |
Side 1: Reflectivity Tolerance at 10.6µm |
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1% to 5%: ±0.5%xR
6% to 85%: +3%
86% to 95%: +1.5%
96% to98%: +1%
99%: +0.2%
99.5%: +0.2% |
Side 2: AR Coating Reflectivity at 10.6µm |
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<= 0.20% |
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988175 |
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774314 |
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132098 |
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346822* |
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554288 |
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187879 |
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120765 |
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903007 |
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*MP-5 type coating
**M is meter, CC is concave, CX is convex, PO is plano
Contact a II-VI sales representative for exact specifications. |
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Toll Free USA and Canada 888.558.1504
Output Couplers (Partial Reflectors)
Link to II-VI corporate website