Results 251 to 260 of about 1,533,904 (293)

Automatic Eye Tracker for Excimer Laser Photorefractive Keratectomy

Journal of Refractive Surgery, 1995
ABSTRACT Acute overlapping of successive laser pulses onto the cornea during photorefractive keratectomy (PRK) is important to avoid refractive distortions. Most excimer laser systems performing corneal ablation lack control of the patient's eye movements and they cannot track the target corneal zone. We developed an
P G, Gobbi, F, Carones, R, Brancato, M, Carena, A, Fortini, F, Scagliotti, A, Morico, E, Venturi   +7 more
openaire   +2 more sources

Operational features of the Leica laser tracker

IEE Seminar Business Improvement Through Measurement, 1999
Leica's laser tracker can follow a moving retro-reflector, measuring its 3D position 1000 times a second. This single sensor device can achieve accuracies of 10s of microns and has a maximum range of some 35 m. It is increasingly used in manufacturing industry as a flexible and accurate large scale coordinate measuring system, for example to inspect ...
openaire   +1 more source

Dynamic performance evaluation of 6D laser tracker sensor

Proceedings of the 10th Performance Metrics for Intelligent Systems Workshop, 2010
In this paper, several methods are presented for the evaluations of 6D sensor dynamic performances, including linear method and rotational method. These methods evaluate a sensor's translational and rotational characteristics under dynamic operations and have been successfully employed in the evaluations of the 3D and 6D sensor products of API.
Kam Lau, Yubing Yang, Yuanqun Liu, Henry Song   +3 more
openaire   +2 more sources

The Framework of the Virtual Laser Tracker – A Systematic Approach to the Assessment of Error sources and Uncertainty in Laser Tracker Measurement

2009
No description ...
openaire   +1 more source

Measurement of Aspherical Surfaces by Laser Tracker

ACTA PHOTONICA SINICA, 2012
In order to test middle and low precision asphere and measurement of asphere during grinding and polishing,a new method by extending the ability of laser tracker is proposed.The testing principle is analyzed,and the testing procedure is devised.The coordinate of several points on the tested asphere can be measured by the laser tracker,and the figure ...
openaire   +1 more source

Digital Twin of a Laser Tracker System

This paper presents the development and implementation of a fully functional digital twin of a laser tracker system for task-specific uncertainty estimation in large-scale coordinate measurements. The proposed solution is based on a modular architecture that separately models the main measurement subsystems using experimentally identified probability ...
Maciej Gruza, Piotr Gąska, Wiktor Harmatys, Adam Gąska   +3 more
openaire   +1 more source

Accuracy Improvement of a 3D Passive Laser Tracker for the Calibration of Industrial Robots

Robotics and Computer-Integrated Manufacturing, 2023
Zhifeng Lou, Kuang-Chao Fan
exaly  

Laser trackers:

1997
G W Caskey, C J Jr Fronczek, S D Phillips   +2 more
openaire   +1 more source

Target induced pointing noise in laser trackers

Applied Optics, 1977
W N, Peters, N A, Nomiyama
openaire   +2 more sources

Accuracy assessment of a laser tracker system

2013
Choosing the right laser tracker system for large-scale metrology is not easy. Currently on the market there are several manufacturers of laser tracker systems, such as: Leica, Faro, API and Nikon. What is new is the Etalon LaserTracer. They differ in terms of construction, application and also the accuracy of the system.
Robert Kupiec, Dubno, Rafał, Jerzy Sładek   +2 more
openaire   +1 more source