Dielectric Mirror, High Reflector, 50.8 mm, 0-50°, 350-1100 nm, 40-20
Model: 20Q620BB.HR2
Product Series Overview
Standard Fused Silica Dielectric MirrorsThe 20Q620BB.HR2 BroadBeam High Reflector Laser Mirror is 50.8 mm in diameter, 9.4 mm thick, and is coated for 350-1100 nm, optimized for 0-50° angle of incidence. BroadBeam High Reflectors have an average reflectivity of 97.5% or better. They are manufactured using UV grade fused silica substrates and metal-dielectric hybrid coating. The BB.HR2 coating covers wavelengths from the UV to the visible to the IR.
UV Fused Silica Substrates
Fused Silica is synthetic amorphous silicon dioxide of extremely high purity. This non-crystalline, colorless silica glass combines a low content of inclusions with high refractive index homogeneity, a very low thermal expansion coefficient, and excellent transmittance in the wavelength regime from UV to NIR. As a result, these mirrors will perform better with temperature fluctuations and is ideal for high-energy laser applications due to its high energy damage threshold. For more information, please see our Optical Materials technical note.
Extremely Broad Wavelength Range With High Reflectivity
Broadbeam mirrors feature unprecedented specifications at an incredible value. These mirrors feature Newport’s proprietary metal-dielectric hybrid coating which provides exceptional reflectivity performance Ravg>97.5% over a very large wavelength range 350 - 1100 nm, 0 - 50 ͦ angle of incidence for both S and P polarizations. Because of the very broad wavelength range and high reflectivity efficiency, the mirror can be used with many different laser wavelengths and can easily replace all of the mirrors in your current system.
More Durable Metal Dielectric Coatings
Specifications
- Wavelength RegionBroadband
- Wavelength Range350-1100 nm
- Mirror ShapeRound
- Diameter50.8 mm
- Mirror SizeØ50.8 mm
- Thickness9.4 mm
- MaterialUV Grade Fused Silica
- Coating TypeMetal-Dielectric
- Coating CodeBB.HR2
- Surface Quality40-20 scratch-dig
- Surface Flatnessλ/10 at 632.8 nm
- Substrate Number20Q620
- Wedge30 ± 15 arc min
- Angle of Incidence0 - 50°
- Clear Aperture≥central 80% of diameter
- Back SurfaceCommercial Polished
- ReflectivityRavg>97.5% @ 0-50° AOI @ 350-1100 nm
- Damage Threshold1.3 J/cm² @ 355 nm, 2 J/cm² @ 532 nm, 2.3 J/cm² @ 1064 nm for 20ns pulses
- Diameter Tolerance+0/-0.13 mm
- Thickness Tolerance±0.38 mm
- Chamfers<0.5 mm face width
- Chamfers Angle Tolerance45° ±15°
- Cleaning
Resources & Downloads
3D Product Models
Other
20Q620BB.HR2 RoHS Certificate(265.2 kB, PDF) 20Q620BB.HR2_ROHS2-2021.pdf(0, PDF)
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