A new miniature laser diffraction grating interferometer is developed in this thesis. According to the theory of grating diffraction and polarization optics, associating with the decoding phase theory of quadrature signal, to make the system achieve nanometer resolution.
In the present paper,the theoretical analysis was performed of the phenomenon and causes of the spectral line missing stage in diffraction of grating and crystal X-ray diffraction,and their application was discussed.
It is found that the space-time dependence of the grating diffraction efficiency can be quasi-regular, allowing the understanding of the experimentally observed irregular behavior of the diffracted light intensity.
The spectral combination characteristic of grating and the bi-grating diffraction imaging effect
This paper reports on a new property of grating, namely spectral combination, and on bi-grating diffraction imaging that is based on spectral combination.
The bi-grating diffraction imaging is the formation of the image of an object with two gratings: the first grating disperses the multi-color light beams from the object and the second combines the dispersed light beams to form the image.
We also presented the equations that relate the two gratings' spatial frequencies, diffraction orders and positions necessary for obtaining the bi-grating diffraction imaging.