动态激光散斑用于透镜轴向象差的测量

在高斯光束照明下，根据在平面内匀速运动的散射体经光学系统在观察面内产生的动态散斑的复振幅和强度起伏的空－时互相关函数，给出了散斑纯沸腾状态的位置，这位置恰好是点光源经过透镜的成象位置，由此提出了一种测量透镜球差、象散和场曲的新方法，并与其它方法作了比较。

Applications of Dynamic Laser Speckle in the Measurements of Lens Longitudinal Aberrations

Under illumination of a Gaussian beam, in this paper we use space-time cross-correlation function of the optical field distribution and the intensity of dynamic speckles produced by the diffuse object moving in its own plane withconstant velocity in the observation plane of optical system. Especially the position of pure boiling state is given for our optical system. It is determined that the position of pure boiling state is just the image" position of a Point source through lenses.According this, a new method is proposed to measure spherical aberration, astigmatism and curvature, and it is compared with other methods.