Based on the transmission rule of laser in atmosphere,combined with laser active deception equipment s principle and operational method,the idea of extinction method used in maximum jamming range test of laser active deception is presented.

In this paper, a study is performed to obtain the average volume concentration of soot particles in a gas flame by the extinction method.

This paper analyses the problem of extinction method,which have been used in ranging capability of impulse laser rangefinders now.

In the paper,the principles and characteristics of four optical diagnostics for soot measurement in the cylinder of diesel engine are introduced,including light extinction method,light scattering method,two-color method and laser induced incandescence(LII).

Light Extinction method is the basic way to measure the particle concentration a.

To research the affect of emulsion concentration on particle sizing,a series of experiments on emulsion particle sizing at different concentrations are carried out by using multi-spectral light extinction method.

With an optical probe based on the principle of multi wavelength light extinction,size and concentration of droplet were measured in a transonic wind tunnel.

On the basis of Lambert-Beer Law, several measuring accuracy influence factors for determination of the hydraulic oil contamination with light extinction are analysed, and the countermeasures are proposed.

The measurement principle of the instruments are light fluctuation and light extinction.

A new checking method of the range finding capability,extinction ratio measurement without target,by which laser emission capability and reception capability can be dividually measured,is put forward.