UV Aluminum Mirror, Borofloat, 101.6 mm, λ/10, 250-600 nm

The 40D20AL.2 Broadband UV Enhanced Aluminum Mirror is an excellent general purpose, broadband reflectors. This 101.6 mm (4.0 inch) diameter mirror is made from a 17.7 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 15-5 surface quality.

Specifications

Technical Specs

Wavelength Region
UV
Wavelength Range
250-600 nm
Mirror Shape
Round
Diameter
101.6 mm
Mirror Size
Ø101.6 mm
Thickness
17.7 mm
Material
Borofloat® 33
Coating Type
UV Enhanced Aluminum
Coating Code
AL.2
Surface Quality
20-10 scratch-dig
Surface Flatness
λ/10 at 632.8 nm

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
101.6 mm
Mirror Size
Ø101.6 mm
Thickness
17.7 mm
Material
Borofloat® 33
Coating Type
UV Enhanced Aluminum
Coating Code
AL.2
Surface Quality
20-10 scratch-dig
Surface Flatness
λ/10 at 632.8 nm

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

40D20AL.2 RoHS Certificate(264.8 kB, PDF)
40D20AL.2_ROHS2-2021.pdf(280.6 kB, PDF)
AL.2 Raw Data CH.xlsx(1.6 MB, XLSX)

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Description	Compatibility
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UV Aluminum Mirror, Zerodur, 50.8 mm, λ/20, 250-600 nm	UNIVERSAL	Learn More
Dielectric Mirror, Broadband, 101.6 mm, 488-694 nm	UNIVERSAL	Learn More

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