Witness Sample, Transmission, 1.400-1.599

Esco Optics witness samples used for transmission are precision polished on both sides to a scratch dig of 60-40. Flatness of each side is < 1 wave @ 633nm at 80% CA. Parallelism < 1 arc min. Edges are safety beveled. Witness sample diameter is 25.40mm and the thickness is 1.50mm.  All of our witness samples are melt lot controlled and individual melt data is available on request. The refractive index values listed are representative of nd at 587nm.  Diameter 25.40 mm +/-0.10 Thickness  1.50 mm +/-0.25 Flatness < 1.0 wave @ 633nm  Surface Quality 60-40 scratch-dig Edges Fine ground and beveled Material info CaF2, UV Fused Silica, S-FPL53, S-FPL51, S-BSL7, S-BAL35, Schott KG2, Schott KG5