Overview: Optical Diffuser (Ground Glass Diffuser) with one face polished and
the other ground provide a solution for a variety of applications
that require a diffuse Gaussian-like distribution. Typical
applications include use in screens, illuminator diffusion, and
targets. Star Optic offers 120, 220, 600 and 800 grit polishes. Each polish
is available in round and square. The various grits provide a range
from fine to coarse scattering. A finer grit (e.g. 800) has a small
diffusion pattern, while a coarser grit (e.g. 120) will have a
larger diffuser pattern. When positioning the diffusers, the grit-polished side should face
away from the source. General Specifications of Sapphire Window: | Material | N-BK7, UV Fused Silica | | Wavefront Distortion | <4λ@633nm per 25mm | | Surface Quality | 80/50 scratch-Dig | | Dimension Tolerance | +0/-0.2mm | | Thickness Tolerance | ±0.2mm | | Parallelism | <3 arc minutes | | Clear Aperture | >90% | | Chamfer | Protective<0.5mmx45° | | Coating | Uncoated, Upon request |
Standard Products of Sapphire Window: Part No. | Material | Dimension (mm) | Thickness (mm) | Grit | | GGD12-120 | N-BK7 | 12.7 | 2.0 | 120 | | GGD25-120 | N-BK7 | 25.4 | 2.0 | 120 | | GGD50-120 | N-BK7 | 50.8 | 2.0 | 120 | | GGD100-120 | N-BK7 | 100.0 | 2.0 | 120 | | GGD1212-120 | N-BK7 | 12.7x12.7 | 2.0 | 120 | | GGD2525-120 | N-BK7 | 25.4x25.1 | 2.0 | 120 | | GGD5050-120 | N-BK7 | 50.8x50.8 | 2.0 | 120 | | GGD100100-120 | N-BK7 | 100.0x100.0 | 2.0 | 120 | | GGD12-220 | N-BK7 | 12.7 | 2.0 | 220 | | GGD25-220 | N-BK7 | 25.4 | 2.0 | 220 | | GGD50-220 | N-BK7 | 50.8 | 2.0 | 220 | | GGD100-220 | N-BK7 | 100.0 | 2.0 | 220 | | GGD1212-220 | N-BK7 | 12.7x12.7 | 2.0 | 220 | | GGD2525-220 | N-BK7 | 25.4x25.1 | 2.0 | 220 | | GGD5050-220 | N-BK7 | 50.8x50.8 | 2.0 | 220 | | GGD100100-220 | N-BK7 | 100.0x100.0 | 2.0 | 220 | | GGD12-600 | N-BK7 | 12.7 | 2.0 | 600 | | GGD25-600 | N-BK7 | 25.4 | 2.0 | 600 | | GGD50-600 | N-BK7 | 50.8 | 2.0 | 600 | | GGD100-600 | N-BK7 | 100.0 | 2.0 | 600 | | GGD1212-600 | N-BK7 | 12.7x12.7 | 2.0 | 600 | | GGD2525-600 | N-BK7 | 25.4x25.1 | 2.0 | 600 | | GGD5050-600 | N-BK7 | 50.8x50.8 | 2.0 | 600 | | GGD100100-600 | N-BK7 | 100.0x100.0 | 2.0 | 600 | | GGD12-800 | N-BK7 | 12.7 | 2.0 | 800 | | GGD25-800 | N-BK7 | 25.4 | 2.0 | 800 | | GGD50-800 | N-BK7 | 50.8 | 2.0 | 800 | | GGD100-800 | N-BK7 | 100.0 | 2.0 | 800 | | GGD1212-800 | N-BK7 | 12.7x12.7 | 2.0 | 800 | | GGD2525-800 | N-BK7 | 25.4x25.1 | 2.0 | 800 | | GGD5050-800 | N-BK7 | 50.8x50.8 | 2.0 | 800 | | GGD100100-800 | N-BK7 | 100.0x100.0 | 2.0 | 800 |
| 
