Apex cuvature radius measuring method and device for aspherics
Title：
Apex cuvature radius measuring method and device for aspherics
Application Number：
 02130716
Application Date：
 2002/09/18
Announcement Date：
 2003/03/19
Pub. Date：
Publication Number：
 1403783
Announcement Number：
 1168951
Grant Date：
 2004-9-29
Granted Pub. Date：
 2004-9-29
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G01B 11/255
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Zeng Lijiang, Wang Hao, Yin Chunyong
Key Words：
 Apex cuvature radius, measuring, aspherics
Abstract：
 The present invention is one kind of apex curvature radius measuring method and device for aspherics and relates to the technology of measuring aspherical optical elements. Based on ray tracing principle, laser beam is projected to the measured aspherics in the dot array structural light mode, the positions of one incident light spot and the reflected light spot on light receiving screen are measured with a CCD camera, and the images of the incident flare and the reflected flare are analyzed and processed in computer, so that the apex curvature radius of the aspherics is obtained. The method has relatively high measurement precision, especially to large apex curvature radius of aspherics, and the present invention may also realize the in-situ measurement of the aspherics in its production.
Claim：
Priority：
PCT：
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