Gratings

Gratings

Diffraction gratings separate polychromatic “white” light into individual wavelengths. Dispersed light is then reimaged by the monochromator/spectrograph so that individual wavelengths can be directed into a detection system or sample.

Key Features

Efficient Wavelength Isolation

Gratings are used to split incident light into several beams spread over multiple directions. They are used alongside spectrometers to measure wavelength intensity over a specific portion of the electromagnetic spectrum. This provides information about the sample by producing a spectral fingerprint.

Variable Resolution Options

When using a grating, the direction in which the incident light is separated is dependent on the beam wavelength and the spacing of the grating. If there are more ridges on the grating, the spectra produced will have a sharper pattern. However, this will be over a smaller region of the electromagnetic spectrum. Therefore, finer gratings are used for high resolution and coarser gratings are used for broad spectral range.

Enhanced Reflectivity Coatings

Each grating is supplied with a bare aluminum coating, offering approximately 85-90% reflectivity from the UV – NIR. This increases to 98% in the SWIR and MIR.

Family Models

Standard* Gratings

Groove DensityBlaze WavelengthAvailable for:Efficiency Curve
50 gr/mm600 nmIsoPlane, SpectraPro, TriVistaview curve
150 gr/mm300 nmIsoPlane, SpectraPro, TriVistaview curve
150 gr/mm500 nmIsoPlane, SpectraPro, TriVistaview curve
150 gr/mm800 nmIsoPlane, SpectraPro, TriVistaview curve
150 gr/mm1.25 μmIsoPlane, SpectraPro, TriVistaview curve
300 gr/mm300 nmIsoPlane, SpectraPro, TriVistaview curve
300 gr/mm500 nmIsoPlane, SpectraPro, TriVistaview curve
300 gr/mm750 nmIsoPlane, SpectraPro, TriVistaview curve
300 gr/mm1.2 μmIsoPlane, SpectraPro, TriVistaview curve
300 gr/mm2 μmIsoPlane, SpectraPro, TriVistaview curve
600 gr/mm300 nmIsoPlane, SpectraPro, TriVistaview curve
600 gr/mm500 nmIsoPlane, SpectraPro, TriVistaview curve
600 gr/mm750 nmIsoPlane, SpectraPro, TriVistaview curve
600gr/mm1 μmIsoPlane, SpectraPro, TriVistaview curve
600 gr/mm1.6 μmIsoPlane, SpectraPro, TriVistaview curve
1200 gr/mm300 nmIsoPlane, SpectraPro, TriVistaview curve
1200 gr/mm500 nmIsoPlane, SpectraPro, TriVistaview curve
1200 gr/mm750 nmIsoPlane, SpectraPro, TriVistaview curve
1200 gr/mmblazed holographic – UV optimizedIsoPlane, SpectraPro, TriVistaview curve
1200 gr/mmholographic – VIS optimizedIsoPlane, SpectraPro, TriVistaview curve
1800 gr/mm500 nmIsoPlane, SpectraPro, TriVistaview curve
1800 gr/mmblazed holographic – UV optimizedIsoPlane, SpectraPro, TriVistaview curve
1800 gr/mmholographic – VIS optimizedIsoPlane, SpectraPro, TriVistaview curve
2400 gr/mm240 nmIsoPlane, SpectraPro, TriVistaview curve
2400 gr/mmblazed holographic – UV optimizedIsoPlane, SpectraPro, TriVistaview curve
2400 gr/mmholographic – VIS optimizedIsoPlane, SpectraPro, TriVistaview curve
3600 gr/mm240 nmIsoPlane, SpectraPro, TriVistaview curve
3600 gr/mmholographic – UV optimizedIsoPlane, SpectraPro, TriVistaview curve

*Larger 68 x 84 mm size gratings are available for 1200 g/mm and higher density gratins. Other blaze wavelength and groove density options are also available. Contact your sales representative for more information.

Resources

Educational Material
Type
Document