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High-Order Diffraction Grating for Optical Spectral Device

A topology of an amplitude transmission diffraction grating is proposed, which allows the formation of spectra in high orders with high intensity. The results of experiments on improving the resolution of a spectral device with a high-order grating proportional to the number of the diffraction order were carried out and presented. The results of the comparison of a conventional and high-order diffraction grating by their efficiency are presented.