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 Density | Blaze Wavelength | Available for: | Efficiency Curve |
|---|---|---|---|
| 50 gr/mm | 600 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 150 gr/mm | 300 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 150 gr/mm | 500 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 150 gr/mm | 800 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 150 gr/mm | 1.25 μm | IsoPlane, SpectraPro, TriVista | view curve |
| 300 gr/mm | 300 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 300 gr/mm | 500 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 300 gr/mm | 750 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 300 gr/mm | 1.2 μm | IsoPlane, SpectraPro, TriVista | view curve |
| 300 gr/mm | 2 μm | IsoPlane, SpectraPro, TriVista | view curve |
| 600 gr/mm | 300 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 600 gr/mm | 500 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 600 gr/mm | 750 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 600gr/mm | 1 μm | IsoPlane, SpectraPro, TriVista | view curve |
| 600 gr/mm | 1.6 μm | IsoPlane, SpectraPro, TriVista | view curve |
| 1200 gr/mm | 300 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 1200 gr/mm | 500 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 1200 gr/mm | 750 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 1200 gr/mm | blazed holographic – UV optimized | IsoPlane, SpectraPro, TriVista | view curve |
| 1200 gr/mm | holographic – VIS optimized | IsoPlane, SpectraPro, TriVista | view curve |
| 1800 gr/mm | 500 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 1800 gr/mm | blazed holographic – UV optimized | IsoPlane, SpectraPro, TriVista | view curve |
| 1800 gr/mm | holographic – VIS optimized | IsoPlane, SpectraPro, TriVista | view curve |
| 2400 gr/mm | 240 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 2400 gr/mm | blazed holographic – UV optimized | IsoPlane, SpectraPro, TriVista | view curve |
| 2400 gr/mm | holographic – VIS optimized | IsoPlane, SpectraPro, TriVista | view curve |
| 3600 gr/mm | 240 nm | IsoPlane, SpectraPro, TriVista | view curve |
| 3600 gr/mm | holographic – UV optimized | IsoPlane, SpectraPro, TriVista | view 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.
