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Grating Dispersion Calculator

 

Grating resolution/dispersion calculator for determining the grating resolution for each Princeton Instruments camera and spectrometer combination.

Grating Dispersion Calculator
The grating curves show typical relative efficiency for the various blaze wavelengths and should be used as a comparison guide only.
Pixel Size µm CCD width/mm
Linewidth, pixels Laser wavelength (nm)
Focal Length mm Aperture ratio
Dispersion nm/mm
Dispersion nm/pixel Grating rotation (°)
Grating Center(cm-1) Slit width µm:
Range (nm) Range (cm-1)
Grooves/mm Spacing/nm Short Wavelength (nm) Long Wavelength (nm)
Grating size/mm Next resolv. wavelength Next resolved wavenumber
Low Raman shift (cm-1) High Raman shift (cm-1)
nm to eV CCD Resolution (nm) Resolution (cm-1)

For Richardson Gratings not listed go to https://www.newport.com/c/diffraction-gratings
Spectral Coverage: approximate, use for reference purpose only.

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)

Center Wavelength to 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.