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Grating Dispersion Calculator

First select the CCD detector
Select a spectrograph model that offers the required focal length
Select the grating
Enter the central wavelength and click the "Enter" button


Select CCD Detector		Center Wavelength(nm)
Hor. pixels:	Vert. pixels:	Grating angle:
Pixel Size :
Spectrograph		Linear dispersion
Select Spectrograph:		Dispersion:
Focal Length (mm):
Aperture ratio:		Bandwith per pixel.

		CCD Resolution (FWHM):

Grating		CCD coverage
Select Grating:		CCD width (mm):
Grating Density (L/mm):		CCD coverage:
Grating size:
Note:

Use 68 x 84mm Grating
When operating at high wavelengths (high grating angles). the 68 x 84 mm grating preserves the light collecting power (aperture Ratio)

Central Wavelength too high
Refers to the mechanical rotation capability (not the operating or optimum range) of a grating drive. Lower the central wavelength or select a grating that allows operation over your required wavelength region.

CCD Resolution (FWHM)
Refers to the resolution available with the selected detector or image intensifier. Calculated as a typical FWHM = 2.5 pixels used as reference, actual values may vary.

We recommend selecting a blaze wavelength that favors the short wavelength side of the spectral region to be covered.