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, 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. | 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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| File | Description | Size | Format | |
|---|---|---|---|---|
| us7619749b2.pdf | 788.54 kB | Adobe PDF | View/Open |
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