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

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 CCD Detector

Center Wavelength(nm)
Hor. pixels: Vert. pixels: Grating angle: 
Pixel Size :

 

  

 
Spectrograph   Linear dispersion  
Select Spectrograph: Dispersion: |
Focal Length (mm): Bandwith per pixel |
Aperture ratio: 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 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.

Link to Richardson Lab grating table:  http://partners.gratinglab.com/products/table1.asp