TE C HN I C AL DATA SHEET
IN FRARED
... the wor ld leader in CO 2 laser optics
REFLECTION AND MATERIAL
PROPERTIES FOR CO2 LASER METAL
MIRRORS USED AT 10.6μm
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IN FRARED
Reflection and Material Properties for Metal Mirrors Used at 10.6 microns
Uncoated Metal
Silver Based
Maximum
Metal
Reflector
Gold Based
Phase Retarding
MMR-A DEMMR DZMMR
Al
Cu
Mo
PS
ES
BG
PG
EG
PEG
SEG
MMR
%R @ 0° AOI @ 10.6µm
98.3
99.2
98.0
99.1
99.6
99.0
98.8
99.5
99.4
99.6
99.8
99.8
99.8
+
+
+
%R @ 45° AOI S-Pol @ 10.6µm
98.7
99.4
98.8
99.4
99.7
99.4
99.3
99.7
99.6
99.8
99.9
99.9
99.8
+
+
%R @ 45° AOI P-Pol @ 10.6µm
97.4
98.9
97.3
98.8
99.2
98.5
98.4
99.2
99.1
99.3
99.7
99.7
99.6
+
%R @ 45° AOI R-Pol @ 10.6µm
98.3
99.2
98.0
99.1
99.5
99.0
98.8
99.5
99.4
99.6
99.8
99.8
99.7
~50-90
90
~40-70
95
~60-95
90
80
~50-90
80
~50-90
40
40
0°±2°
0°±2°
0°±2°
6°-9°
+
0°±2°
+
+
+
+
0°±2°
0°±2°
%R @ 45° AOI R-Pol @ 0.6328µm
Phase Retardation @ 45° AOI
TRZ
Polarization Control
ATFR
PLM
PLM-W
+
99.8
+
+
+
+
+
+
99.0
99.5
+
+
+
+
≤ 1.5
≤ 90.0
99.7
99.5
98.0
99.0
+
+
+
80
90**
80
+
+
80
+
+
+
0°±2°
0°±2°
90°±3°
90°±3°
+
+
+
λ/4 RPR* λ/4 HRPR*
≤ 97.0 ≤
Values Shown are Minimum Values Unless Otherwise Stated
Properties of Substrate Materials
Figure of Merit (FOM) for Mirrors
Copper
Molybdenum
Silicon
Aluminum
(Cu)
(Mo)
(Si)
(Al)
Thermal Conductivity (W/cm° C)
3.90
1.33
1.56
1.67
Coefficient of Expansion (x10-6/°C)
16.7
5.4
2.6
22.5
Density (g/cm3)
8.96
10.2
2.33
2.7
Hardness (Mohs)
3
6
7
2.75
Young's Modulus (x106 PSI)
17
47
19
10
0.385
0.250
0.716
0.900
Specific Heat (J/g°C)
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FOM
=
k
AX
=
*
These products are used at 45°AOI
with plane polarized light at 45° to
the plane of incidence.
+
These products are not intended for
use at these parameters.
**
600 to 700 nanometers
k
(1-R%)X
k
=
Thermal Conductivity of Substrate
R
=
Reflectivity of the Coating
X
=
Coefficient of Expansion of Substrate
A
=
Total Absorption of the Coating