Material
|
UV grade fused silica or BK7 glass
|
S1 Surface Flatness
|
λ/10 at 633 nm
|
S1 Surface Quality
|
20-10 scratch & dig (MIL-PRF-13830B)
|
S2 Surface Flatness |
λ/10 at 633 nm |
S2 Surface Quality |
20-10 scratch & dig (MIL-PRF-13830B)
|
Diameter Tolerance
|
+0.00 mm-0.12 mm
|
Thickness Tolerance
|
±0.25
|
Parallelism
|
<30 arcsec
|
Chamfer
|
0.3 mm at 45° typical
|
Technology
|
Electron beam multilayer dielectric
|
Adhesion and Durability
|
Per MIL-C-675A. Insoluble in lab solvents
|
Clear Aperture
|
Exceeds central 85% of diameter
|
Damage Threshold:
|
>5 J/cm2, 8 nsec pulse, 1064 nm typical for BK7 substrate
>8 J/cm2, 8 nsec pulse, 1064 nm typical for UVFS substrate |
Coated Surface Flatness
|
λ/10 at 633 nm over 85% over clear aperture
|
Angle of Incidence
|
0 or 45 degrees
|
Back side antireflection coated: |
AOI 45°, R<0.5%, AOI 0°, R<0.2%. |
EKSMA Optics Nd:YAG Laser Harmonic Separators
133.5 kB |
Reflectance is higher than 99.5% for the wavelength of interest and transmittance is at least 90% for the rejected wavelengths. Offered on Ø 0.5 or 1 inch substrates of BK7 or UVFS with surface flatness λ/10; The rear surface of harmonic separators is antireflection coated.