Gold Mirror, Zerodur, 76.2 mm, λ/10, 650-20,000 nm
Gold Mirror, Zerodur, 76.2 mm, λ/10, 650-20,000 nm
Model: 30Z20ER.4
Product Series Overview
High-Performance Zerodur Metallic MirrorsThe 30Z20ER.4 Broadband Gold 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.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 30Z20ER.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 15-5 surface quality.
Specifications
- Wavelength RegionBroadband
- Wavelength Range650-20000 nm
- Mirror ShapeRound
- Diameter76.2 mm
- Mirror SizeØ76.2 mm
- Thickness14.7 mm
- MaterialZerodur® or equivalent
- Coating TypeProtected Gold
- Coating CodeER.4
- Surface Quality15-5 scratch-dig
- Surface Flatnessλ/10 at 632.8 nm
- Angle of Incidence0-45°
- Clear Aperture≥central 80% of diameter
- Back SurfaceGround
- ReflectivityRavg>96%, Rmin>92% @ 650-1700 nmRavg>98%, Rmin>96% @ 1.7-20 µm
- Damage Threshold0.5 J/cm² with 10 ns pulses at 1064 nm, 20Hz
- Diameter Tolerance+0/-0.13 mm
- Thickness Tolerance±0.25 mm
- Chamfers0.38–1.14 mm face width
- Chamfers Angle Tolerance45° ±15°
- Cleaning
Resources & Downloads
3D Product Models
Other
30Z20ER.4 RoHS Certificate(265.7 kB, PDF) 30Z20ER.4_ROHS2-2021.pdf(0, PDF) ER.4 Raw Data.xlsx(223.5 kB, XLSX)
2D Product Drawings
30Z/40Z/60Z/80Z Zerodur Metallic Mirror Drawing(99 kB, PDF)
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