Material
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UV grade fused silica
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Surface Flatness
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λ/10 typical at 633 nm
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Surface Quality
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20-10 scratch & dig (MIL-PRF-13830B)
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Diameter Tolerance
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+0.00 mm -0.12 mm
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Thickness Tolerance
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±0.25 mm
|
Parallelism
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30 arcsec
|
Chamfer
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0.3 mm at 45° typical
|
Technology
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Ion Beam Sputtering (IBS)
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Clear Aperture
|
Exceeds central 85% of diameter
|
Coated Surface Flatness
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λ/8 at 633 nm over 80% of diameter
|
Transmitted Wavefront Distortion (TWD)
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λ/10 over clear aperture
|
Laser damage threshold
|
Measured for 10 ns pulse, 10 Hz, 1064 nm
|
Back side antireflection coated | R<0.1% at AOI=0° R<0.5% at AOI=45° |
EKSMA Optics Dichroic Mirrors with High Transmission
71.83 kB |