Grating Dispersion Calculator

  • First select the Detector
  • Select a spectrograph model that offers the required focal length
  • Select the grating
  • Enter the central wavelength or Drag and Drop the cursor

The grating curves show typical relative efficiency for the various blaze wavelengths for selected gratings and should be used as a comparison guide only.

Select Detector

Center Wavelength(nm)

 
Hor. pixels: Vert. pixels: Grating angle:   
Pixel Size µm:

 

 
Spectrograph   Linear dispersion  
Select Spectrograph: Dispersion: |
Focal Length (mm): Bandwidth per pixel |
Aperture ratio: CCD Resolution (FWHM): |
Grating   CCD coverage
Select Grating: CCD width (mm):
Grating Density (L/mm): CCD coverage:
Grating size:    
Note:

 891012-2010


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 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. Calculated as a typical FWHM = 2.5 pixels used as reference, actual values may vary.

Spectral Coverage:
approximate, use for reference purpose only.