Dielectric Mirror, Laser Line, Zerodur, 25.4 mm, λ/10, 632.8 nm

The 10Z20DM.4 Laser Line Dielectric mirror is a highly efficient reflector optimized for the 632.8 nm wavelength. This 1 inch (25.4 mm) diameter mirror is made from a 6.0 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.4 coating is designed for use with HeNe lasers and has a center wavelength of 632.8 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/10 surface flatness and a 15-5 surface quality.

Specifications

Technical Specs

Wavelength Region
VIS
Wavelength Range
632.8 nm
Mirror Shape
Round
Diameter
25.4 mm
Material
Zerodur^® or equivalent
Coating Type
Laser Line Dielectric
Coating Code
DM.4
Reflectivity
R_s, R_p>99% @ 632.8 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
10Z20
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
6.0 mm
Thickness Tolerance
±0.25 mm
Diameter Tolerance
+0/-0.13 mm
Chamfers
0.25–0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Damage Threshold
500 W/cm² CW, 5 J/cm² for 10 nsec pulses @ 694 nm

Wavelength Region
VIS
Wavelength Range
632.8 nm
Mirror Shape
Round
Diameter
25.4 mm
Material
Zerodur^® or equivalent
Coating Type
Laser Line Dielectric
Coating Code
DM.4
Reflectivity
R_s, R_p>99% @ 632.8 nm
Surface Quality
15-5 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
10Z20
Angle of Incidence
0-45°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Thickness
6.0 mm
Thickness Tolerance
±0.25 mm
Diameter Tolerance
+0/-0.13 mm
Chamfers
0.25–0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics
Damage Threshold
500 W/cm² CW, 5 J/cm² for 10 nsec pulses @ 694 nm

Resources & Downloads

Other

10Z20DM.4 RoHS Certificate(707 kB, PDF)
DM.4 Raw Data.xlsx(54.4 kB, XLSX)

2D Product Drawings

Laser Line Dielectric Mirror Drawing(102.9 kB, PDF)

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