Echelle Gratings
Echelle gratings feature low groove density and large blaze angles, and are designed for utilization of high-order diffraction spectra. They are commonly used in combination with other spectroscopic components such as gratings or prisms to separate overlapping spectral orders. With superior spectral resolution, echelle gratings serve as an ideal option for high-resolution spectroscopic applications.
Parameters
| Material: Float glass | Surface Quality: 60/40 |
| Clear Aperture: 90% | Dimension Tolerance: ± 0.5 mm |
| Thickness Tolerance: ± 0.5 mm | Effeciency: 45%~ 65%@Peak wavelength |
| LIDT: 350 mJ/cm2@200 ns pulse laser, 40W/cm2 CW laser |
Model
| Dimension(mm) | Groove density(l/mm) | Blaze angle | Blaze wavelength(μm) | Dispersive(nm/mr) |
| 12.7×12.7×6 | 31.6 | 63° | UV~57 | 14.37 |
| 12.7×12.7×6 | 79 | 63° | UV~23 | 5.75 |
| 12.7×12.7×6 | 79 | 75° | UV~25 | 3.28 |
| 12.7×12.7×6 | 316 | 63° | UV~5.7 | 1.44 |
| 25x25x9.5 | 31.6 | 63° | UV~57 | 14.37 |
| 25x25x9.5 | 79 | 63° | UV~23 | 5.75 |
| 25x25x9.5 | 79 | 75° | UV~25 | 3.28 |
| 25x25x9.5 | 316 | 63° | UV~5.7 | 1.44 |
| 25x25x9.5 | 31.6 | 63° | UV~57 | 14.37 |
| 25x25x9.5 | 79 | 63° | UV~23 | 5.75 |
| 25x25x9.5 | 79 | 75° | UV~25 | 3.28 |
| 25x25x9.5 | 316 | 63° | UV~5.7 | 1.44 |