| 摘要 |
PROBLEM TO BE SOLVED: To realize a micro and high-performance optical component for converting optical beam. SOLUTION: A lens to be a prototype is approximated by steps 13, corresponding to some phase difference. In the curved surface of the multi-step constitution, the thickness 14 corresponding to 360°is made zero, each time it becomes an integral multiple of the wavelengthλ. Accordingly, the final form 15 is made into a multilayer structure of planar films, and the thickness can be reduced down toλ. In the case of a reflective element, the multilayer structure is made and the surface is then made reflective, as has been mentioned. As a result, loss, such as spillover is reduced, and the high-efficiency optical element is realized. COPYRIGHT: (C)2006,JPO&NCIPI
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