Elliptical Mirror, Gold, N-BK7, 25.4 mm x 35.9 mm, λ/10, 650-20,000 nm

The 10E20ER.4 Broadband Gold Elliptical Mirror is an excellent general purpose, broadband reflector. This 25.4 mm (1.0 inch) minor axis, 35.9 mm (1.41 inch) major axis, elliptical mirror is made from a 6.0 mm thick N-BK7 substrate. The ER.4 protected gold coating is ideal for applications requiring broadband reflectance in the near IR to the far IR. A multilayer dielectric overcoat provides protection to the gold from the environment. The 10E20ER.4 has an average reflectivity greater than 96% from 650 - 1700 nm and greater than 98% from 1.7 - 20 µm. This mirror has a λ/10 surface flatness and a 40-20 surface quality.

Specifications

Technical Specs

Wavelength Region
Broadband
Wavelength Range
650-20000 nm
Mirror Shape
Elliptical
Mirror Size
25.4 x 35.9 mm
Thickness
6.0 mm
Material
N-BK7
Coating Type
Protected Gold
Coating Code
ER.4
Surface Quality
40-20 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>96%, R_min>92% @ 650-1700 nmR_avg>98%, R_min>96% @ 1.7-20 µm
Damage Threshold
0.5 J/cm² with 10 ns pulses at 1064 nm, 20Hz
Thickness Tolerance
±0.2 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Wavelength Region
Broadband
Wavelength Range
650-20000 nm
Mirror Shape
Elliptical
Mirror Size
25.4 x 35.9 mm
Thickness
6.0 mm
Material
N-BK7
Coating Type
Protected Gold
Coating Code
ER.4
Surface Quality
40-20 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>96%, R_min>92% @ 650-1700 nmR_avg>98%, R_min>96% @ 1.7-20 µm
Damage Threshold
0.5 J/cm² with 10 ns pulses at 1064 nm, 20Hz
Thickness Tolerance
±0.2 mm
Chamfers
0.38–1.14 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Resources & Downloads

Other

10E20ER.4 RoHS Certificate(705.4 kB, PDF)
ER.4 Raw Data.xlsx(223.5 kB, XLSX)

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