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diffraction grating material and application? Types of diffraction grating and their production methods?

diffraction grating material and application?
Types of diffraction grating and their production methods?
Science   Advanced-Physics   
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Optical element that diffract energy into the consistent wavelength is called the diffraction grating .There are basically two types of diffraction grating

1) ruled grating

2) holographic grating

Ruled grating : basically it is produced by a ruling engine which cut those grooves into coasting on grating substrate.

Holographic grating : it is produced by an interference lithography that result a smooth groove surface and eliminate those periodic error that occur in the previous method

Diffraction grating can be a reflection or transmission grating . Reflection grating is coated with reflective coating whereas in transmission coating there is an antireflection coating

Replica grating is commercial diffraction grating produced from sub master.

The diffraction grating produce Spectra that means it slit a polychromatic light into consistent color .it is also used in pulse compression

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