04 Dec 2012
DeLn Optics supplies the high surface quality Glass Cube with all the surfaces polished, the specs as below: Material: BK7, UV Fused Silica, ..etc. Dimension Tolerance: +0.0, -0.1mm Clear Aperture: >95% Parallelism: < 10 arc sec. Surface Quality: 20/10 Wavefront Distortion: < l/10 per 25mm @633mm Bevel: <0.25mm x 45° Chip: <0.05mm