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Title: Methods and apparatus of aligning surfaces
Authors: Cheung, CFB 
Li, H
Lee, WB 
To, S 
Kong, L
Issue Date: 17-Nov-2009
Source: US Patent 7,619,749 B2. Washington, DC: US Patent and Trademark Office, 2009. How to cite?
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:Patent

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