The sort of advances that will really change the world , such as ethanol that can be made cheaply from grass or trees , or solar cells that can be painted onto almost any surface , remain a distant prospect 而那些真的能改变世界的技术进步，比如用廉价的草或树制造酒精，或是可以安装于任何物体表面的太阳能电池，还是一个遥远的梦想。
Yasuyuki ikeda , satoru yoneyama , motoharu fujigaki , et al . absolute phase analysis method for three dimensional surface profilometry using frequency modulated grating , society of photo - optical instrumentation engineers [ j ] . opt eng , 2002 , 42 ( 5 ) : 1249 周聪玲.基于快速标定方法的三维物体表面轮廓测量系统的研究[ d ] .天津:天津轻工业学院. 2002
Solid metal casing , suitable for harsh environment testing , grading ip67 protection and response time nema6 . 50 delicate provide analog output , the surface of objects , materials , texture and color monitor 坚固的金属外壳，适宜苛刻的检测环境，防护等级ip67和nema6 。 50微妙的响应时间，提供模拟量输出，可以对物体表面质地纹理及颜色进行监测。
