PRECISION MEASUREMENT OF THE RADIUS OF CURVATURE OF CONVERGENT LASER BEAM
会聚球面波曲率半径的精确测量

A new way of dealing with the approxnnation of the quasi-Fresnel diffrac-tio n has been proposed and a new method of precisely measuring the radius of curva-ture of convergent laser beambyholographic grating has been repo rted. andtheerrors of the me asurement have been analyzed. The method has the advantages ofhigh accuracy. convenient measurement and simple apparatus and is hekpful to themanufacture of high accuracy holo graphic lens. coneave hofograph ic grating and others.