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Knight Optical's high quality holographic research range of diffraction gratings are used to separate white light into its component wavelengths. This type of grating has lower stray-light levels than ruled gratings and are available in closer rulings. Blazed holographics are also available with a similar profile and efficiency to ruled types, for use at UV wavelengths.

The manufacturing process differs to that of ruled gratings, allowing for closer lines with less structure error and hence less stray light.  The improved performance of these holographic gratings makes them ideal for spectroscopy applications in the instrumentation and medical testing sectors, where efficient and high performance are required.

For more information on our stock range of holographic diffraction gratings or to enquire about your custom requirements, please contact our technical sales team.

Data for calculation
Where G=groove density (lines/mm) and n is the order of diffraction (any integer). Blazed gratings have facets inclined at an angle b to the surface to concentrate light into the first order (n=+1). When the grating is used in the Littrow condition (retroreflection, i=i`) peak efficiency will be near the blaze wavelength shown (= (2/G) sin b). 

Other wavelengths available at short notice.
Other sizes.
Other coatings, tansmission types available to order.

4 Items

Name Type Length (mm) Width (mm) Thickness (mm) Grooves/mm Blaze angle (nm) Price Buy
GDA120000 Holographic Diffraction Grating 25 25 9.5 1200 VIS
GDA240000 Holographic Diffraction Grating 25 25 9.5 2400 VIS
GDU120000 Holographic Diffraction Grating 25 25 9.5 1200 UV
GDU240000 Holographic Diffraction Grating 25 25 9.5 2400 UV

4 Items


Holographic Diffraction Gratings

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Blaze angle (nm)