Non-spherical detection method of electronic virtual proof-plate |
Title： |
| Non-spherical detection method of electronic virtual proof-plate |
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Application Number： |
200310100204 |
Application Date： |
2003/10/10 |
Announcement Date： |
2004/09/15 |
Pub. Date： |
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Publication Number： |
1529151 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
G01M 11/02G01N 21/45 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Cheng Haobo, Feng Zhijing, Xin Ke |
Key Words： |
Non-spherical, detection method, virtual proof-plate, electronic |
Abstract： |
In the invention, three frames of theoretical aspheric interference fringes with equal phasic difference as referenced wave front. CCD pick-up head with high resolution captures one dimension of printing forme of actual fringes of tested aspheric surface measured by digital wave plane interferometer, and captured information through image collection card is input into computer. Three frames of digital electric moire fringe with equal phasic difference are obtained after digital superimposing information of actual fringes. Fringe distribution of continuous face form of the tested surface is obtained after operations of noise removing, phase calculation and wave front reconstruction. Comparing with traditional zero position compensation tests, the invention possesses advantages of simple adjusting, time saving and high accuracy. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
2006-3-8Date of deemed withdrawal |
 Relevancy information |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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