Output Couplers (Partial Reflectors)

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.

 

Specifications

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)
90% of diameter
Surface Figure (power/irregularity) at 0.63µm
Plano
Radiused
1 fringe/0.5 fringe
(varies depending upon radius)
Surface-Dig

20-10
Side 1: Reflectivity Tolerance at 10.6µm

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

<= 0.20%
Part #
Description
Diameter
(inches)
Diameter
(mm)
Edge
Thickness
(inches)
Edge
Thickness
(mm)
Reflectivity
Radius**
Side 1/Side 2
988175
ZnSe
1.0”
25.4
0.236”
5.99
65%
30MCC/30MCX
774314
ZnSe
1.0”
25.4
0.236”
5.99
50%
PO/PO
132098
ZnSe
1.1”
27.94
0.220”
5.59
50%
20MCC/15MCX
346822*
ZnSe
1.181”
30.0
0.236”
5.99
50%
30MCC/30MCX
554288
ZnSe
1.5”
38.1
0.236”
5.99
30%
10MCC/10MCX
187879
ZnSe
1.5”
38.1
0.236”
5.99
UC
10MCC/15MCX
120765
ZnSe
1.5”
38.1
0.236”
5.99
30%
20MCC/PO
903007
ZnSe
2.0”
50.8
0.300”
7.62
48%
30MCC/20MCX
*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.

Specifications

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)
90% of diameter
Surface Figure (power/irregularity) at 0.63µm
Plano
Radiused
1 fringe/0.5 fringe
(varies depending upon radius)
Surface-Dig

20-10
Side 1: Reflectivity Tolerance at 10.6µm

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

<= 0.20%