Based on the principle of demodulating the displacement of the projected fringes with digital image correlation method, a micro fringe projection correlation method is proposed.

基于数字图像相关法解调被物体高度调制的投影栅线平移量的原理，提出了显微栅线投影相关法的概念。

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The principle of projection type micro optical encoder has been described and the optics theory of grating imaging is deduced.

对投影型微光学编码器的原理进行了分析，结合微机电系统集成技术，提出并实现了投影型微光学编码器。

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As an additional feature of Portable Multimedia Player, Micro-projection can satisfy the growing demand of large screen and high definition video, its application prospects must be very good.

微型投影作为便携式多媒体播放器的一个附加功能，可满足人们日益增强的对大屏高清视频的需求，其应用前景相当广阔。

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Of course, much will depend on how good the projection is, but already "the image quality of these micro projectors can be impressive considering their size, " notes Aloysius Choong, an analyst with research firm IDC, who's seen a few prototypes in action.

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