Gratings holographic grating

Holographic Gratings. Holographic grating.-i are appearing in ever-increasing numbers in modern optical instruments, even some of the less expensive ones. 

In addition to interference filters, NIR manufacturers use holographic gratings (moving and fixed), interferometers, polarization interferometers, diode arrays, acoustic-optic tunable filters, as well as some specialty types. 

Figure 3.36. Different types of holographic gratings, (a) Both writing beams have the same polarization intensity grating. (b) The writing beams are left and right circularly polarized linear polarization grating, (c) The writing beams are s and p polarized mixed-polarization grating.

N. Everall, H. Owen and J. Slater, Performance analysis of an integrated process Raman analyzer using a multiplexed transmission holographic grating, CCD detection, and confocal fiberoptic sampling, Appl. Spectrosc., 49, 610-615 (1995). 

Spex II, Model 1403) with 1800 grooves mm-i holographic gratings coupled to a photomultiplier (RCA) with associated electronics (EG G Princeton Applied Research, Model 1112). 

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