| This paper mainly talk about the modem digital video products of projection display, digital camera, backlight which for LCD, analyze its working principium of optical system, study its key technology of the main optical components, discusses the development and production levels at home and abroad, summarize some pieces of optical technology which are adapt for our corporation's new products exploitation.This paper give a study of PYOE optical technology development status, mainly at optical design, process technology, manufacture instruments and inspection methods etc. Through analyze the optical technology of modem digital video production, this paper put an ides on optical industry development of PYOE.According to the requirement, LCOS projection lens is designed successfully, which has simple configuration, good image and can be used in mass production. Building a design method of projection lens.
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