| Our precision Glass Windows are optically polished with parallel faces, making them useful not only as windows, but as substrates for special beamsplitters etc. They are ideal for applications which require minimal transmitted beam deviation and can be produced either uncoated or with AR coating for ranges covering both visible and NIR (450-900nm). The windows listed below are quality grade, square BK7 windows of various dimensions. Specifications: | Material: | BK7 | | Diameter: | +0, -0.15mm | | Length, width: | ±0.1mm | | Thickness: | ±0.1mm | | Flatness: | λ/4 over 90% of aperture dimensions | | Surface Quality: | <40-20 scratch/dig | | Parallelism: | <30 arcsec | | |
BK7 Window - Quality Grade - Squares
