UV Aluminum Mirror, Zerodur, 50.8 mm, λ/10, 250-600 nm

High-Performance Zerodur Metallic Mirrors

The 20Z20AL.2 Broadband UV Enhanced Aluminum Mirror is an excellent general purpose, broadband reflector. This 50.8 mm (2.0 inch) diameter mirror is made from a 12.7 mm thick Zerodur substrate. Zerodur, a glass-ceramic material, exhibits nominally zero thermal expansion which provides extra stability for applications requiring diffraction limited performance. The AL.2 UV enhanced aluminum coating is a durable, broadband UV reflector with an average reflectivity greater than 90% from 250-600 nm. The AL.2 aluminum coating contains a durable dielectric overcoat to prevent oxidation of the metal. This mirror has a λ/10 surface flatness and a 15-5 surface quality.

Specifications

Technical Specs

Wavelength Region
UV
Wavelength Range
250-600 nm
Mirror Shape
Round
Diameter
50.8 mm
Mirror Size
Ø50.8 mm
Thickness
12.7 mm
Material
Zerodur^® or equivalent
Coating Type
UV Enhanced Aluminum
Coating Code
AL.2
Surface Quality
15-5 scratch-dig

Angle of Incidence
0-45°
Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Reflectivity
R_avg>90% @ 250-600 nm
Damage Threshold
2 J/cm² with 10 ns pulses at 355 nm, 20Hz
Diameter Tolerance
+0/-0.13 mm
Thickness Tolerance
±0.25 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Wavelength Region
UV
Wavelength Range
250-600 nm
Mirror Shape
Round
Diameter
50.8 mm
Mirror Size
Ø50.8 mm
Thickness
12.7 mm
Material
Zerodur^® or equivalent
Coating Type
UV Enhanced Aluminum
Coating Code
AL.2
Surface Quality
15-5 scratch-dig

Angle of Incidence
0-45°
Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Reflectivity
R_avg>90% @ 250-600 nm
Damage Threshold
2 J/cm² with 10 ns pulses at 355 nm, 20Hz
Diameter Tolerance
+0/-0.13 mm
Thickness Tolerance
±0.25 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Resources & Downloads

3D Product Models

Other

20Z20AL.2 RoHS Certificate(265.1 kB, PDF)
20Z20AL.2_ROHS2-2021.pdf(280.5 kB, PDF)
AL.2 Raw Data.xlsx(236.6 kB, XLSX)

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