Manufacture of Aspherical Convex Fresnel Lens with Ideal Cross-Sectional Profile

Autor:	Toshio Sata, Osamu Miyagawa, Kiyoshi Sawada, Tomohiko Kawai, Nuttaphong Sornsuwit, Yoshimi Takeuchi
Rok vydání:	2000
Předmět:	Surface (mathematics) Materials science business.industry Mechanical Engineering Fresnel lens Edge (geometry) Zone plate Industrial and Manufacturing Engineering law.invention Lens (optics) Optics Mechanics of Materials law Surface roughness Cylindrical lens Photolithography business
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 66:3754-3759
ISSN:	1884-8354 0387-5024
Popis:	The study proposes a manufacturing method of aspherical Fresnel lens and dies with ideal lens profile. Conventional methods such as photolithography reveals low surface quality due to step-like cross-section and burr generation. In the study, the use of side cutting edge of a single crystal diamond tool allow Fresnel lens and dies to be manufactured with high optical efficiency. Ultraprecision Fresnel lens dies of 60 mm in diameter was created without any burr by using an ultraprecision turning center having 1 nm positioning accuracy and a diamond tool. The surface roughness of slopes in Fresnel lens grooves was 8 nm (peak to valley) in the radial and circumferential directions. Fresnel lens manufactured directly on an acrylic resin plate also shows disigned performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e66c6eb5357b49152a1c1ac81f5a88dc https://doi.org/10.1299/kikaic.66.3754 Zobrazit plný text záznamu