Wide-band Infrared Gratings

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.