The high-precision window is made of BK7 optical glass and UV fused quartz, the fused silica quartz window plate is suitable for high power laser that needs good thermal stability, and the window made of N-BK7 material is cheaper, which is suitable for laser applications that pay more attention to cost.Both fused quartz and N-BK7 laser window plates have precision grades of 1/10 lambda surface flatness and 10-5, 20-10 surface quality to ensure minimal interference to the transmitted beam.Sunday Optics is specialized in the processing of precision optical window,We have four-axis polishing machine, large-size ring polishing machine, two-axis machine to manufacture high precison windows for customers. we can offer 24 inch zygo flatness reports, full CA 600mm windows. Specifications Diameter 1mm to 1000mm Diameter Tol. +/-0.02mm Material Bk7 sapphire fused silica,ZnS2,CaF2,Si,Ge. Surface Quality 10-5 standard Flatness 1/10 lambda (Full CA 600mm) Parallisam
Porro Prism A refracting optical prism used in optical instruments to modify image orientation, In use, the light enters through the largest rectangular plane in the prism, passes through two total reflections of the inclined plane, and then penetrates the original plane of incidence, Because the light comes in and out normally, the prism does not disperse. But the image that passes through Porro prism will be flipped 180 degrees, and it will travel in the direction it entered, which means it will travel 180 degrees. Porro Prism Material BK7, UV Fused Silica, Sapphire, ZnSe,Caf2,Si,Ge,etc. Size 3mm-300mm Size tolerance 0.00/-0.05mm or customer request Clear Aperture 90% S/D 60-40 40-20 20/10 10/5 Flatness 1/10 1/4lambda at 632.80nm Chamfer 0.25mmx45 Angle tolerance
