Echelle Diffraction Gratings
Echelle Replica Gratings
Echelle replica gratings are special low period gratings designed for use in high orders only. The maximum possible resolution is obtained but, in general, it is necessary to use a second grating or prism to separate out the overlapping diffracted orders. Echelle replica gratings are an ideal solution for high-resolution spectroscopy due to their high dispersion in high orders.
Any Optometrics grating is available with either standard or CW-type construction for higher damage threshold performance. They can also be produced on substrates with a lower coefficient of thermal expansion for better stability. No damage threshold minimums apply to gratings with an overcoat.
Pulsed 350 milli-joules/ cm2 @ 200 n sec.
CW 40 watts/cm2
Pulsed 3.5 joules/ cm2 @ 200 n sec.
CW 250 watts/cm2
Optometrics develops hybrid grating and optical filter for holographic weapons sight.