Echelle Gratings
- Low groove density
- High diffraction orders
- Increased dispersion (spacing)
Elleche Gratings Common Data
| wdt_ID | Items | Data |
|---|---|---|
| 1 | Coating: | Aluminium |
| 2 | Construction: | Ruled Grating |
| 3 | Substrate: | Float Glass |
| 4 | Thickness (mm): | 6.00 ±0.5 |
| 5 | Groove Spacing Tolerance (%): | < 0.05 |
| 6 | Spectral Order (m): | 1 |
| wdt_ID | SKU | Grooves (l/mm) | Blaze Angle | Ruled Area (H×W mm2) |
|---|---|---|---|---|
| 1 | RE11-001 | 54.5 | 46° | 100×100 |
| 2 | RE11-002 | 79 | 63.43° | 136×260 |
| 3 | RE11-003 | 80 | 63.43° | 50×76 |
Typically used in high orders, echelle gratings can provide high dispersion and resolution. Echelle gratings are most often used in applications where high dispersion and resolution are important, such as atomic absorption spectroscopy, laser tuning, and astronomy. SEM for echelle grating is shown in figure.