Improved performance of a refurbished photoelectric autocollimator

Astrua, Milena; Pisani, Marco

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′′

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:	ASTRUA, MILENA PISANI, MARCO
Data di pubblicazione:	2020
Rivista:	MEASUREMENT SCIENCE & TECHNOLOGY
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′′
Full-text (pubblici):	none
Appare nelle tipologie:	1.1 Articolo in rivista

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