Fiducial-Aided Robust Positioning of Optical Freeform Surfaces
Form characterization of a machined optical freeform surface demands accurate alignment of the sampled measured data points on the machined surface, and they are compared with the designed geometry of the surface through positioning. In this paper, a fiducial-aided robust positioning method (FAPM) i...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-01-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2072-666X/9/2/52 |
| _version_ | 1828805159964114944 |
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| author | Shixiang Wang Chi Fai Cheung Mingjun Ren Mingyu Liu |
| author_facet | Shixiang Wang Chi Fai Cheung Mingjun Ren Mingyu Liu |
| author_sort | Shixiang Wang |
| collection | DOAJ |
| description | Form characterization of a machined optical freeform surface demands accurate alignment of the sampled measured data points on the machined surface, and they are compared with the designed geometry of the surface through positioning. In this paper, a fiducial-aided robust positioning method (FAPM) is developed which attempts to evaluate freeform surfaces with high efficiency and precision. The FAPM method makes use of fiducials as reference datum to form a fiducial-aided computer-aided design (FA-CAD) of the freeform surface which not only establishes an inherent surface feature, but also links the different coordinate systems among design coordinate frame, machine tool, and measurement instrument. To verify the capability of the proposed method, a series of experiments were conducted. Compared with the traditional freeform measurement method (e.g., least squares method), the results indicate that the robustness and accuracy of the measurement is significantly enhanced by the FAPM. |
| first_indexed | 2024-12-12T07:50:38Z |
| format | Article |
| id | doaj.art-7edfa889c7c140f6804dc27d04ce2a20 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-12-12T07:50:38Z |
| publishDate | 2018-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-7edfa889c7c140f6804dc27d04ce2a202022-12-22T00:32:27ZengMDPI AGMicromachines2072-666X2018-01-01925210.3390/mi9020052mi9020052Fiducial-Aided Robust Positioning of Optical Freeform SurfacesShixiang Wang0Chi Fai Cheung1Mingjun Ren2Mingyu Liu3Parnter State Key Laboratory of Ultra-Precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, ChinaParnter State Key Laboratory of Ultra-Precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, ChinaParnter State Key Laboratory of Ultra-Precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, ChinaParnter State Key Laboratory of Ultra-Precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, ChinaForm characterization of a machined optical freeform surface demands accurate alignment of the sampled measured data points on the machined surface, and they are compared with the designed geometry of the surface through positioning. In this paper, a fiducial-aided robust positioning method (FAPM) is developed which attempts to evaluate freeform surfaces with high efficiency and precision. The FAPM method makes use of fiducials as reference datum to form a fiducial-aided computer-aided design (FA-CAD) of the freeform surface which not only establishes an inherent surface feature, but also links the different coordinate systems among design coordinate frame, machine tool, and measurement instrument. To verify the capability of the proposed method, a series of experiments were conducted. Compared with the traditional freeform measurement method (e.g., least squares method), the results indicate that the robustness and accuracy of the measurement is significantly enhanced by the FAPM.http://www.mdpi.com/2072-666X/9/2/52fiducialspositioningfreeform surfaceprecision metrologyrobustness |
| spellingShingle | Shixiang Wang Chi Fai Cheung Mingjun Ren Mingyu Liu Fiducial-Aided Robust Positioning of Optical Freeform Surfaces Micromachines fiducials positioning freeform surface precision metrology robustness |
| title | Fiducial-Aided Robust Positioning of Optical Freeform Surfaces |
| title_full | Fiducial-Aided Robust Positioning of Optical Freeform Surfaces |
| title_fullStr | Fiducial-Aided Robust Positioning of Optical Freeform Surfaces |
| title_full_unstemmed | Fiducial-Aided Robust Positioning of Optical Freeform Surfaces |
| title_short | Fiducial-Aided Robust Positioning of Optical Freeform Surfaces |
| title_sort | fiducial aided robust positioning of optical freeform surfaces |
| topic | fiducials positioning freeform surface precision metrology robustness |
| url | http://www.mdpi.com/2072-666X/9/2/52 |
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