material:BK7,Fused Silica Specifications: Material: BK7 or Fused SilicaDiameter: Φ25.4mm+0/-0.2mmThickness: 3.0mm±0.2mmClear Aperture: >90%FWHM: ±5 nmPeak Transmission: >80%Block: 0.01% (±20nm from the peak) Standard wavelength: 355, 405, 488, 514, 532, 633, 780, 850, 1064 Specifications: Material: Quartz CrystaDiameter Tolerance: +0/-0.2mmClear Aperture: >90%Parallelism: <3 arc secThickness ...