Model of aspherisation for higher-dioptry spectacle lens;

The convex lens making the parallel light converge to the focal point;

The Divergent Thought on the Convex Lens Focusing Experiment;

Propagation algorithm of broadband laser beam via convex lens is obtained based on Huygens-Fresnel diffraction in tegral and lenss phase transform property,and the transform property is studied by numerical method.

The experiment shows that a bright point appears in the center of the newton's ring and the newton's ring is obtained on the screen with only one convex.

For solving problems of complication and high cost by solar simulator with certain parallel degree, a simple but effective so-lar simulator was built with xenon lamp and convex selected.