Methods and Apparatus of Aligning Surfaces
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
Hong Kong
Patent Number: US7619749B2
Application Number: US2006511361A
Inventor: Cheung, Chi-Fai | Li, Huifen | Lee, Wing-Bun | To, Suet | Kong, Lingbao
Priority Date: 3 Feb 2006
Priority Number: US7619749B2
Application Date: 29 Aug 2006
Publication Date: 17 Nov 2009
IPC Current: G01B001124 | G06F001710 | G06F001750 | G06T001540 | G09G000500
US Class: 356601 | 345421 | 345619 | 703001 | 703002
Assignee Applicant: The Hong Kong Polytechnic University
Title: Methods and apparatus of aligning surfaces
Usefulness: Methods and apparatus of aligning surfaces
Summary: Used for aligning a surface to another surface (claimed) e.g. ultra-precision freeform surface, to develop a micro-optical-electro-mechanical device that is utilized in a photonics and telecommunication product e.g. F-theta lenses, for a laser printer.
Novelty: Surface e.g. ultra-precision freeform surface, aligning method for micro-optical-electro-mechanical device, involves selecting set of feature points from two surfaces, and adjusting coordinate of one surface
光學
激光
CHEUNG Chi-fai
LI Hui-fan
LEE Wing-bun
TO Sandy
KONG Lingbao
美國
