Echelle gratings are characterized by low groove density and a large blaze angle, designed for operation in higher diffraction orders. They are typically paired with other dispersive elements (gratings or dispersive prisms) to resolve overlapping spectra. With exceptional spectral resolution, echelle gratings are the ideal solution for high-resolution spectroscopy applications.
| Material：Float glass | Effeciency：45%~65% @Blazing wavelength |
| Surface Quality：60/40 | Clear Aperture：90% |
| Dimension Tolerance：± 0.5 mm | Thickness Tolerance：± 0.5 mm |
| LIDT：350mJ/cm2 @200nspulse laser 40W/cm2 CW laser | |
