UV Aluminum Mirror, Economy, Borofloat, 50.8 mm Square,λ/10, 250-600 nm

Economy Square Broadband Metallic Mirrors

The 20SD520AL.2 is an Economy UV Enhanced Aluminum Broadband Square Mirror. By taking advantage of advanced polishing techniques and our high-volume manufacturing, these mirrors are truly cost effective. This 50.8 x 50.8 mm (2.0 x 2.0 inch) square mirror is made from 12.0 mm thick Borofloat® 33 substrate which is coated with the AL.2 aluminum coating. Borofloat® 33 has low thermal expansion and is an excellent substrate for most applications. 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 60-40 surface quality.

Specifications

Technical Specs

Wavelength Region
UV
Wavelength Range
250-600 nm
Mirror Shape
Square
Mirror Size
50.8 x 50.8 mm
Thickness
12.7 mm
Material
Borofloat® 33
Coating Type
UV Enhanced Aluminum
Coating Code
AL.2
Surface Quality
60-40 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
20SD520
Angle of Incidence
0-15°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Reflectivity
R_avg>90% @ 250-600 nm
Damage Threshold
2 J/cm², 10 ns pulses , 20 Hz at 355 nm
Size 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
Square
Mirror Size
50.8 x 50.8 mm
Thickness
12.7 mm
Material
Borofloat® 33
Coating Type
UV Enhanced Aluminum
Coating Code
AL.2
Surface Quality
60-40 scratch-dig
Surface Flatness
λ/10 at 632.8 nm
Substrate Number
20SD520
Angle of Incidence
0-15°

Clear Aperture
≥central 80% of diameter
Back Surface
Ground
Reflectivity
R_avg>90% @ 250-600 nm
Damage Threshold
2 J/cm², 10 ns pulses , 20 Hz at 355 nm
Size 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

Other

20SD520AL.2 RoHS Certificate(704.1 kB, PDF)
AL.2 Raw Data CH.xlsx(1.6 MB, XLSX)

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