Considering the generalized gradient approximation and local spin density approximation,this paper calculates geometry structure,electronic structure and optical constants of MgCNi3 by full potential linearized augmented plane-wave.

The fitting and application of optical constants of infrared coating materials based on Lorentz oscillator model;

Determination of the optical constants of highly ordered porous anodic alumina film;

The optical constants of GaN film investigated by spectroscopic ellipsometry;

Determination of optical constants of thin films by means of transmission spectra and simulated annealing algoritm;

Based on the explanation of the impact of the changes of optical property of aerosols on the global atmospheric environment, optical constants and parameters of different background stratospheric aerosols are computed.

The ellipsometric spectra of the testing thin films were measured at either 50° or 70° incident angle under 300~1000nm wavelength range,upon which the thickness and the optical constants(refractive index and extinction coefficient) of the films were also obtained.

An atomic Faraday anomalous dispersion optical filter(FADOF),which characterized with its ultra narrow peaks of wavelength transmissions,is employed to improve the frequency stability of a semiconductor laser.