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SpectraPro spectrographs use diffraction gratings as the optical element which separates (disperses) polychromatic “white” light into individual wavelengths (colors). When polychromatic light encounters the grating it is dispersed so that each wavelength reflects from the grating at a slightly different angle. Dispersed light is then reimaged by the monochromator or spectrograph so that individual wavelengths (or a desired band of wavelengths) can be directed to a detection system or sample.

Back to: Acton Research Spectrometer Selection Chart  
See also: Dispersion and Bandpass Performance

Grating
Groove
Density		 Grating
Blaze
Wavelength		 Optimum
Wavelength
Range		 SP 150
32x32mm		   SP 300i 
68x68mm**		 SP-500i
68x68mm		 SP-750
68x68mm**
50g/mm 600nm 400-1200nm 150-05-600 1-05-600 1-05-600 750-1-05-600
75g/mm 8µm 5-l3µm ——— 1-075-8 1-075-8 750-1-075-8
l50g/mm 300nm 200-500nm 150-015-300 1-015-300 1-015-300 750-1-015-300
l50g/mm 500nm 330-950nm 150-015-500 1-015-500 1-015-500 750-1-015-500
150g/mm 800nm 475-1300nm 150-015-800 1-015-800 1-015-800 750-1-015-800
150g/mm 4µm 2,6-6µm 150-015-4 1-015-4 1-015-4 750-1-015-4
300g/mm 300nm 200-500nm 150-030-300 1-030-300 1-030-300 750-1-030-300
300g/mm 500nm 330-900nm 150-030-500 1-030-500 1-030-500 750-1-030-500
300g/mm 1µm 650-1800nm 150-030-1 1-030-1 1-030-1 750-1-030-1
300g/mm 2µm 1,3-3µm 150-030-2 1-030-2 1-030-2 750-1-030-2
600g/mm 300nm 200-500nm 150-060-300 1-060-300 1-060-300 750-1-060-300
600g/mm 500nm 330-900nm 150-060-500 1-060-500 1-060-500 750-1-060-500
600g/mm 1µm 650-1800nm 150-060-1 1-060-1 1-060-1 750-1-060-1
600g/mm 1,6µm 1-2.4µm 150-060-1,6 1-060-1-6 1-060-1-6 750-1-060-1,6
1200g/mm Holographic 190-400nm 150-120-HUV 1-120-HUV 1-120-HUV 750-1-120-HUV
1200g/mm 300nm 200-500nm 150-120-300 1-120-300 1-120-300 750-1-120-300
1200g/mm 500nm 330-900nm 150-120-500 1-120-500 1-120-500 750-1-120-500
1200g/mm 750nm 500-1400nm 150-120-750 1-120-750 1-120-750 750-1-120-750
1200g/mm Holographic 450-1400nm --- 1-120-HVIS 1-120-HVIS

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1800g/mm 500nm 330-850nm 150-180-500 1-180-500 1-180-500 750-1-180-500
2400g/mm 240nm 190-450nm 150-240-240 1-240-240 1-240-240 750-1-240-240
2400g/mm Holographic 190-450nm 150-240-HUV 1-240-HUV 1-240-HUV 750-1-240-HUV
2400g/mm Holographic 450-700nm 150-240-HVIS 1-240-HVIS 1-240-HVIS 7 50-1-240-HVIS
3600g/mm 240nm 190-450nm 150-360-240 1-360-240 1-360-240 750-1-360-240
3600g/mm Holographic 190-450nm 150-360-HUV 1-360-HUV 1-360-HUV 750-1-360-HUV
Over 100 Additional Gratings are Available on Request for SpectraPro Monochromators and Spectrographs
** Standard grating size is 68x68mm with larger 68x84mm gratings available as an option 68x84mm gratings 
preserve the light collecting power (aperture ratio) when operating at high wavelengths (high grating angles). 
68x84mm gratings benefit operation above 1.2 µm with a 1200g/mm grating .