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|Title: ||Methods and apparatus of aligning surfaces|
|Authors: ||Cheung, Chi-fai Benny|
Lee, W. B.
|Issue Date: ||17-Nov-2009 |
|Citation: ||US Patent 7,619,749 B2. Washington, DC: US Patent and Trademark Office, 2009.|
|Abstract: ||Ultra-precision freeform surfaces are important to the development of complex and micro-optical-electro-mechanical devices used in many photonics and telecommunication products such as F-theta lenses for laser printers. These surfaces are complex and large scale surface topologies with shapes that generally possesses no rotational symmetry. Due to the geometrical complexities of these ultra-precision freeform surfaces, it is difficult to characterize the form accuracy and surface quality of freeform optical surfaces. The method of this invention is based on feature-point pre-fixture, and iterative precision alignment algorithm, which can provide sufficient capability of form characterization for ultra-precision freeform surfaces with form accuracy down to below sub-micrometer range.|
|Rights: ||Assignee: The Hong Kong Polytechnic University.|
|Appears in Collections:||ISE Patents|
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