All Bach Research standard Diffraction Gratings are produced to the following specifications:
- First order blazed wavelength +/- 10%
- Thickness of substrate =/- 0.5mm (center thickness concave/convex gratings)
- Length & width of substrate +/- 0.1mm
- Diameter of round substrate +/- 0.1mm
- Radius of concave/convex grating +/- 0.1%
- Centering of ruled area +/- 1mm
- Temperature resistance 125º F. (higher temperature resistance on request)
Substrate Materials: Reflection gratings are supplied on precision annealed BK-7 but can also be available on Fused Silica, ZeroDur, Aluminum or other exotic material on request. Transmission gratings are supplied on BK-7. Fused Silica is optional at extra cost.
Substrate Dimensions: The grating dimensions can be customized to fit your specific requirement.
Reflectance Materials: All reflection gratings listed are aluminum replicas. Overcoating with Al MgF2, gold or platinum is optional at extra cost. Price quoted on request for Osmium, Iridium and Rhodium.
Availability: All gratings are available from stock. Please contact us whenever availability is crucial.
Special Orders: Our selection of standard gratings is constantly being increased. If you donʼt find a particular grating listed, contact us to see whether it can be manufactured.
OEM Prices: Original Equipment Manufacturers are invited to send us their requirements. We are happy to quote special OEM pricing on request.
Cleaning of Gratings:Gratings must be handled with extreme care. Under no circumstances should the surface ever be touched. A fingerprint, dust or a film of oil can destroy the performance of the grating. Dust and oil can sometimes be removed but this calls for expert handling. Bach Research gratings may be returned to the factory for cleaning for a fee. However, we can give no assurances of success in cleaning the grating.