A series of charateristic optimization design algorithms have been proposed after our carefully research on the current binary optics design methods

which include the nerval network algorithm

the virtual field modulating algorithm and the adaptive local modulating algorithm. Arround these algorithms

the design of binary phase gratings

phase-only beam flatters and extended Fresnel lens(The Fresnel lens with extended feature size) will be introduced in this paper. Finally

the fabrication results will be reported generally.