Standard tolerances on gratings

The following standard tolerances apply to all gratings:

1. Alignment of grooves to side of substrate (for rectangular substrates): ± 0.15º
2. Groove Spacing: < 0.05 %
3. Nominal Blaze Wavelength: ± 25 nm (first order, in Littrow) in most cases

In applications where the knowledge of the peak efficiency is critical, please contact us for a complete efficiency curve of the grating that interests you.

Please contact us if you require gratings whose specifications require tighter tolerances.

Standard tolerances on substrates

The following standard tolerances apply to all grating substrates:

1. Thickness of substrate: ± 0.5 mm
2. Length and width of substrate: ± 0.1 mm
3. Diameter of round substrate: ± 0.1 mm
4. Radius of concave gratings: ± 0.1%
5. Centering of ruled area on substrate: ± 1 mm

Please contact us if you require gratings whose substrates require tighter tolerances.