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Title: Three-dimensional measurement method and instrument
Other Title: 三维测量方法与仪器
Authors: Li, DA 
Cheung, CF 
Ren, M 
Lee, WB 
To, S 
Issue Date: 16-Feb-2018
Source: 中国专利 ZL 201410357264.2
Abstract: The invention provides a three-dimensional measurement method and instrument. The method comprises the following steps: setting a micro lens array to enable characteristic points of a to-be-measured surface on a workpiece to form a plurality of image points, setting a sensing plane, obtaining a plurality of image points formed on the sensing plane by the characteristic points of the to-be-measured surface on the workpiece, setting a mapping plane, setting a plurality of mapping points, which correspond to the image points one by one, on the mapping plane, setting a refocusing plane, setting a convergence point array, which comprises a plurality of convergence points arranged in an array, on the refocusing plane, connecting the mapping points with the convergence points corresponding to the mapping points to form a plurality of refocusing connecting lines of the characteristic points, enabling the refocusing connecting lines to intersect at a refocusing point, calculating a three-dimensional coordinate of the refocusing point, obtaining three-dimensional coordinates of the characteristics through the calculation according to the three-dimensional coordinate of the refocusing point, and displaying the three-dimensional coordinates of the characteristics. Usage is simple and convenient, and measurement accuracy is high.
Rights: Assignee: The Hong Kong Polytechnic University
Appears in Collections:Patent

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