Aluminum Mirror, Zerodur, 76.2 mm, λ/10, 450-700 nm

High-Performance Zerodur Metallic Mirrors

The 30Z20ER.1 Broadband Aluminum Mirror is an excellent general purpose, broadband reflector. This 76.2 mm (3.0 inch) diameter mirror is made from a 14.7 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 ER.1 enhanced aluminum coating may be used wherever a broadband visible and near infrared reflector is needed. A multilayer dielectric stack deposited over the aluminum film boosts reflectance and improves the durability of the coating. The 30Z20ER.1 has an average reflectivity greater than 93% from 450-700 nm. This mirror has a λ/10 surface flatness and a 15-5 surface quality.

Specifications

Technical Specs

Wavelength Region
VIS
Wavelength Range
450-700 nm
Mirror Shape
Round
Diameter
76.2 mm
Mirror Size
Ø76.2 mm
Thickness
14.7 mm
Material
Zerodur^® or equivalent
Coating Type
Enhanced Aluminum
Coating Code
ER.1
Surface Quality
15-5 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>93%, R_min>90 % @ 450-700 nm
Damage Threshold
0.5 J/cm² with 10 ns pulses at 532 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
VIS
Wavelength Range
450-700 nm
Mirror Shape
Round
Diameter
76.2 mm
Mirror Size
Ø76.2 mm
Thickness
14.7 mm
Material
Zerodur^® or equivalent
Coating Type
Enhanced Aluminum
Coating Code
ER.1
Surface Quality
15-5 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>93%, R_min>90 % @ 450-700 nm
Damage Threshold
0.5 J/cm² with 10 ns pulses at 532 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

Other

30Z20ER.1 RoHS Certificate(265.7 kB, PDF)
30Z20ER.1_ROHS2-2021.pdf(281.1 kB, PDF)
ER.1 Raw Data.xlsx(237.2 kB, XLSX)

Related Products

Similar

Description	Compatibility	Price
30D20ER.1Aluminum Mirror, Borofloat, 76.2 mm, λ/10, 450-700 nm	UNIVERSAL	$496
30D20AL.2UV Aluminum Mirror, Borofloat, 76.2 mm, λ/10, 250-600 nm	UNIVERSAL	$543
30Z20ER.4Gold Mirror, Zerodur, 76.2 mm, λ/10, 650-20,000 nm	UNIVERSAL	$903
30Z20ER.2Silver Mirror, Zerodur, 76.2 mm, λ/10, 480-20,000 nm	UNIVERSAL	$856

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