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EnglishAn old photoelectric Hilger & Watts autocollimator (AC) has been modified at INRIM to perform accurate angle measurements on two axes in a range of ±250′′. A CMOS camera was placed in the focus of the AC’s optical system and a software implemented in LabVIEW processes on-line the image of the reticle projected on the camera. The data acquisition is triggerable at a selectable frequency up to some hertz to allow synchronization in critical applications. The AC’s sensitivity was determined through a calibration with respect to the national angle standard. The combined standard uncertainty of the AC calibration results to be equal to 0.035′′
Improved performance of a refurbished photoelectric autocollimator / Astrua, Milena; Pisani, Marco. - In: MEASUREMENT SCIENCE & TECHNOLOGY. - ISSN 0957-0233. - 32(2020), p. 015010.
| Titolo: | Improved performance of a refurbished photoelectric autocollimator |
| Autori: | |
| Data di pubblicazione: | 2020 |
| Rivista: | |
| Citazione: | Improved performance of a refurbished photoelectric autocollimator / Astrua, Milena; Pisani, Marco. - In: MEASUREMENT SCIENCE & TECHNOLOGY. - ISSN 0957-0233. - 32(2020), p. 015010. |
| Abstract: | An old photoelectric Hilger & Watts autocollimator (AC) has been modified at INRIM to perform accurate angle measurements on two axes in a range of ±250′′. A CMOS camera was placed in the focus of the AC’s optical system and a software implemented in LabVIEW processes on-line the image of the reticle projected on the camera. The data acquisition is triggerable at a selectable frequency up to some hertz to allow synchronization in critical applications. The AC’s sensitivity was determined through a calibration with respect to the national angle standard. The combined standard uncertainty of the AC calibration results to be equal to 0.035′′ |
| Handle: | http://hdl.handle.net/11696/67330 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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