Please note that these gratings are bare aluminum and do not contain an overcoat. (Note: 1 st Order Beam is Collinear and Antiparallel to Incident Beam) For information regarding the differences between grating types, please click on the Gratings Guide tab above. We also offer holographic gratings, which do not produce ghosting effects at the expense of efficiency. For more information, please click on the Gratings Tutorial tab above. They are offered with different blaze angles to suit a variety of applications in spectroscopy and analysis where high efficiency is of primary concern. These gratings will have a relatively sharp efficiency peak about their blaze wavelength and are produced from ruled originals. Thorlabs offers ruled diffraction gratings for use in the near-IR region. Soda Lime Glass Substrate with 300 to 1200 Grooves/mm.High Grating Efficiency of 60 to 80% at Blaze Wavelength.Diffraction Grating Mounted in Polaris Mirror Mount Using Diffraction Grating Adapter Features
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