A new method of measuring the lens focus is presented, which is based onthe principle of transformation of the Gauss laser beam.
根据透镜对高斯激光束束宽的变换原理，提出了一种由变换前后发散角的变化确定透镜焦距的新方法。
2
From the principle of maximum entropy, the radial distribution function of the end-to-end distance was deduced directly, and it is indicated that the function is Gauss-type function.
The principle of image decomposition and reconstruction based on Gauss-pyramid, Laplacian-pyramid, contrast-pyramid and wavelet-pyramid is emphatically analyzed, as well as the fusion algorithm.