Broadband Dielectric Mirror, Zerodur, 50.8 mm, λ/10, 488-694 nm
Description
The 20Z20BD.1 Broadband Dielectric Mirror is an extremely versatile mirror for laboratory applications and highly efficient over a broad wavelength range. This 2 inch (50.8 mm) diameter mirror is made from a 12.7 mm thick Zerodur substrate. Zerodur is a glass-ceramic material where thermal expansion is nominally zero. This extra stability can be critical for applications requiring diffraction limited performance. The BD-1 coating is extremely durable and will withstand repeated cleaning. This mirror has a λ/10 surface flatness and a 15-5 surface quality.
Technical Specs
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Wavelength Region
VIS
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Wavelength Range
488-694 nm
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Mirror Shape
Round
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Mirror Size
Ø50.8 mm
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Material
Zerodur®
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Coating Type
Broadband Dielectric
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Coating Code
BD.1
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Surface Quality
15-5 scratch-dig
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Surface Flatness
λ/10 at 632.8 nm
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Substrate Number
20Z20
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Angle of Incidence
0-45°
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Clear Aperture
≥central 80% of diameter
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S2 Surface
Ground
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Reflectivity
Rs (avg)>99%, Rp (ave)>98% @ 488-694 nm
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Damage Threshold
500 W/cm2 CW, 1 J/cm2 with 10 nsec pulses within the wavelength range, typical
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Thickness
12.7 mm
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Thickness Tolerance
±0.25 mm
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Diameter
50.8 mm
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Diameter Tolerance
+0/-0.13 mm
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Chamfers
0.38–1.14 mm face width
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Chamfers Angle Tolerance
45° ±15°
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Cleaning
Non-abrasive method, acetone or isopropyl alcoholon lens tissue recommended