Gratings, diffraction holographic

Diffraction gratings may be made by a holographic process, but blaze characteristics cannot be controlled and their efficiency is low in the infrared. They are mostly used for low-order work in the visible and near-ultraviolet. 

Fig. 23 Plausible structure of the holographic diffraction grating, with an alternating arrangement of N and I phases present under the relief structure.

Labarthet, F. L., Buffeteau, X, and Sourisseau, C. Molecular orientations in azopolymer holographic diffraction gratings as studied by Raman confocal microspectroscopy, f. Phys. Chem. B 1998, 102, pp. 5754-5765. 

Figure 7.11. Premonochromator based on a holographic diffraction grating mounted in a glass cube.

Figure 12.23. Schematic of Kaiser Mark II fiber-optic probe head. A holographic diffraction grating and pinhole act to remove silica scattering from the laser light and improve beam quality by spatial filtering. (Adapted from Reference 1 with permission.)...

Labarthet, E L., Buffeteau, T., and Sourisseau, C. Azopolymer holographic diffraction gratings Time dependent analyses of the diffraction efficiency, birefringence, and surface modulation induced by two linearly polarized interfering beams. J. Phys. Chem. B 1999, 103, pp. 6690-6699. 

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