Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/1715
Title: Methods and apparatus of aligning surfaces
Authors: Cheung, Chi-fai Benny
Li, Huifen
Lee, W. B.
To, Sandy
Kong, Lingbao
Issue Date: 17-Nov-2009
Source: 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.
Type: Patent
URI: http://hdl.handle.net/10397/1715
Appears in Collections:Patents of PolyU
ISE Patents

Files in This Item:
File Description SizeFormat 
us7619749b2.pdf788.54 kBAdobe PDFView/Open


All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated. No item in the PolyU IR may be reproduced for commercial or resale purposes.