Dielectric Mirror, Laser Line, Zerodur, 50.8 mm, λ/20, 532 nm

The 20Z40DM.11 Laser Line Dielectric mirror is a highly efficient reflector optimized for the 532 nm wavelength. This 2 inch (50.8 mm) diameter mirror is made from a 12.7 mm thick Zerodur substrate. Zerodur is a glass-ceramic material where thermal expansion is nominally zero. This extra stability can be critical for applications requiring diffraction limited performance. The DM.11 coating is designed for use with low-power Nd:YAG lasers and has a center wavelength of 532 nm. The coating achieves greater than 99% reflectance, from 0–45° angle of incidence, for any polarization. This multilayer dielectric coating is extremely durable, making it resistant to damage from repeated cleaning. This mirror has a λ/20 surface flatness and a 10-2 surface quality.

Specifications

Technical Specs

Wavelength Region
VIS
Wavelength Range
532 nm
Mirror Shape
Round
Diameter
50.8 mm
Material
Zerodur^® or equivalent
Coating Type
Laser Line Dielectric
Coating Code
DM.11
Reflectivity
R_s, R_p>99% @ 532 nm
Surface Quality
10-2 scratch-dig
Surface Flatness
λ/20 at 632.8 nm
Substrate Number
20Z40
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
12.7 mm
Thickness Tolerance
±0.25 mm
Diameter Tolerance
+0/-0.13 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Damage Threshold
500 W/cm² CW, 2 J/cm² for 10 nsec pulses

Wavelength Region
VIS
Wavelength Range
532 nm
Mirror Shape
Round
Diameter
50.8 mm
Material
Zerodur^® or equivalent
Coating Type
Laser Line Dielectric
Coating Code
DM.11
Reflectivity
R_s, R_p>99% @ 532 nm
Surface Quality
10-2 scratch-dig
Surface Flatness
λ/20 at 632.8 nm
Substrate Number
20Z40
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
12.7 mm
Thickness Tolerance
±0.25 mm
Diameter Tolerance
+0/-0.13 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Damage Threshold
500 W/cm² CW, 2 J/cm² for 10 nsec pulses

Resources & Downloads

Other

20Z40DM.11 RoHS Certificate(265 kB, PDF)
20Z40DM.11_ROHS2-2021.pdf(281.4 kB, PDF)
DM.11 Raw Data.xlsx(54.1 kB, XLSX)

2D Product Drawings

Laser Line Dielectric Mirror Drawing(102.9 kB, PDF)

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