External visual interface for a Nikon 6D autocollimator

Ponencia presentada en IEEE I&M International Instrumentation and Measurement Thechnology Conference, 12 al 15 de mayo de 2014, Montevideo, Uruguay.The goal of this paper is to describe the potential of a visual interface applied to a Nikon 6B/6D autocollimator in order to replace human operator within a laboratory grade measurement. The optical interface implemented consists of a Basler HD camera attached to the autocollimators eyepiece, camera positioning devices, and a proprietary digital image processing package, built around Matlab environment. The whol system is used to analyze the reticle image to detect both the scale and the measuring crosshair lines at sub-pixel level. The system performance was compared in a controlled experiment against an electronic level with internationally traceable certification. The resolution of the pitch angles obtained was 10 times better than that originally obtained with the instrument. This example shows that the value of 0.02 pixels for the uncertainty associated with sub-pixel position of reticle lines is realistic, allowing for continue working on a robust interface for all angle parameters that can be measured using autocollimators.http://ieeexplore.ieee.org/Xplore/home.jspFil: Bergues, Guillermo. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Informática para la Ingeniería; ArgentinaFil: Ames, Guillermo. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Informática para la Ingeniería; ArgentinaFil: Canali, Luis. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Informática para la Ingeniería; ArgentinaFil: Schurrer, Clemar. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Transferencia en Metrología; ArgentinaFil: Flesia, Ana Georgina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.Fil: Flesia, Ana Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Estudios de Matemática; Argentina.Fil: Flesia, Ana Georgina. Universidad Nacional de Córdoba. Centro de Investigaciones y Estudios de Matemática; Argentina.Fil: Flesia, Ana Georgina. Universidad Tecnológica Nacional. Facultad Regional Córdoba; ArgentinaOtras Ciencias de la Computación e Informació

Electronic Interface with Vignetting Effect Reduction for a Nikon 6B/6D Autocollimator

In this paper, we present an electronic interface created for the Nikon 6B/6D visual autocollimator that allows for an increase in the final resolution of measurements and a reduction in the vignetting and distortion effects produced by this optical instrument's lenses. The electronic interface consists of a Basler ACE high-definition camera and its positioning devices and a computer with a subpixel digital image processing package. The latter includes two main procedures: one for scale calibration and the other for determining the position of crosshair lines. Both procedures work at subpixel level. The feasibility of the measurement method was verified. The resolution obtained for the measurement of angular displacements is about 0.019 s of arc, 25 times better than the one registered by the original visual system. Its overall performance was compared against an electronic level with internationally traceable certification.Fil: Bergues, Guillermo Juan. Universidad Tecnológica Nacional. Facultad Regional Córdoba; ArgentinaFil: Canali, Luis Rafael. Universidad Tecnológica Nacional. Facultad Regional Córdoba; ArgentinaFil: Schurrer, Clemar Aldino. Universidad Tecnológica Nacional. Facultad Regional Córdoba; ArgentinaFil: Flesia, Ana Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomia y Física. Sección Matemática. Grupo de Probabilidad y Estadística; Argentin

Manufacturing Metrology

Metrology is the science of measurement, which can be divided into three overlapping activities: (1) the definition of units of measurement, (2) the realization of units of measurement, and (3) the traceability of measurement units. Manufacturing metrology originally implicates the measurement of components and inputs for a manufacturing process to assure they are within specification requirements. It can also be extended to indicate the performance measurement of manufacturing equipment. This Special Issue covers papers revealing novel measurement methodologies and instrumentations for manufacturing metrology from the conventional industry to the frontier of the advanced hi-tech industry. Twenty-five papers are included in this Special Issue. These published papers can be categorized into four main groups, as follows: Length measurement: covering new designs, from micro/nanogap measurement with laser triangulation sensors and laser interferometers to very-long-distance, newly developed mode-locked femtosecond lasers. Surface profile and form measurements: covering technologies with new confocal sensors and imagine sensors: in situ and on-machine measurements. Angle measurements: these include a new 2D precision level design, a review of angle measurement with mode-locked femtosecond lasers, and multi-axis machine tool squareness measurement. Other laboratory systems: these include a water cooling temperature control system and a computer-aided inspection framework for CMM performance evaluation

Technical design report for the PANDA Barrel DIRC detector

The PANDA (anti-Proton ANnihiliation at DArmstadt) experiment will be one of the four flagship experiments at the new international accelerator complex FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany. PANDA will address fundamental questions of hadron physics and quantum chromodynamics using high-intensity cooled antiproton beams with momenta between 1.5 and 15 GeV/c and a design luminosity of up to 2 × 1032 cm-2 s-1. Excellent particle identification (PID) is crucial to the success of the PANDA physics program. Hadronic PID in the barrel region of the target spectrometer will be performed by a fast and compact Cherenkov counter using the detection of internally reflected Cherenkov light (DIRC) technology. It is designed to cover the polar angle range from 22° to 140° and will provide at least 3 standard deviations (s.d.) π/K separation up to 3.5GeV/c, matching the expected upper limit of the final state kaon momentum distribution from simulation. This documents describes the technical design and the expected performance of the PANDA Barrel DIRC detector. The design is based on the successful BaBar DIRC with several key improvements. The performance and system cost were optimized in detailed detector simulations and validated with full system prototypes using particle beams at GSI and CERN. The final design meets or exceeds the PID goal of clean π/K separation with at least 3 s.d. over the entire phase space of charged kaons in the Barrel DIRC

GSI Scientific Report 2016

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