Production Capabilities:
Material: BK7
Dimension Tolerance: ± 0.2mm
90°Deviation Tolerance: ≤10 arc sec
Surface Flatness: ≤λ/4 over the clear aperture
Surface Quality: 40-20scratch and dig
Clear Aperture Central diameter: >85% of dimension
Coating:
R<0.5% per transmitted face from 400 to 700 nm
R>85% per reflective face from 400 to 700 nm
Bare aluminum with black lacquer overcoat
Chamfer: 0.25-0.5 mm face width x 45° ± 15°
Material: BK7,grade A fine annealed Dimension Tolerance: ± 0.2mm 90°Deviation Tolerance: ≤3 arc min Surface Flatness: ≤λ/2 over the clear aperture Surface Quality: 60-40scratch and dig Clear Aperture Central diameter: > 85% of dimension Coating: R<0.5% per transmitted face from 400 to 700 nm R>90% per reflective face from 400 to 700 nm Bare aluminum with black lacquer overcoat Chamfer: 0.3 mm x 45° |