Results 191 to 200 of about 35,254 (230)
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Biofilm thickness variability investigated with a laser triangulation sensor
Biotechnology and Bioengineering, 2000Measurement of the surface roughness and thickness of biological films is laborious and usually destructive, thus hampering research in this area. We developed a laser triangulation sensor (LTS) set-up for the fast and nondestructive measurement of these biofilm parameters during growth.
Okkerse, W.J.H. +2 more
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Blind guidance system based on laser triangulation
Optical Engineering, 2012We propose a new guidance system for the blind. An optical triangulation method is used in the system. The main components of the proposed system comprise of a notebook computer, a camera, and two laser modules. The track image of the light beam on the ground or on the object is captured by the camera and then the image is sent to the notebook computer
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High Precision Laser Triangulation by Speckle Decorrelation
1994Because of their versatility, adaptability and robustness laser triangulation sensors are widely used in industry /1/,/2/. Sources of measurement error in laser triangulation are fluctuations of intensity and coherence of laser light, surface roughness and damage as well as quantum, photonic and thermal noise of the laser source, CCD-sensors and signal
Hendrik Rothe, Horst Truckenbrodt
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Measurement Uncertainty of Microscopic Laser Triangulation on Technical Surfaces
Microscopy and Microanalysis, 2015AbstractLaser triangulation is widely used to measure three-dimensional structure of surfaces. The technique is suitable for macroscopic and microscopic surface measurements. In this paper, the measurement uncertainty of laser triangulation is investigated on technical surfaces for microscopic measurement applications.
Thomas, Mueller +2 more
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Analysis of sub-pixel laser spot detection in laser triangulation systems
Optical Measurement Systems for Industrial Inspection XI, 2019Laser spot detection is an important step of laser triangulation and limits its accuracy. Common methods to determine the center position include circle fitting, the Hough transformation, the gray centroid method or Gaussian fitting. As these algorithms were often tested in different set-ups and under various conditions, they generally lead to diverse ...
Patrick Kienle +4 more
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Accuracy assessment of a laser triangulation sensor
Conference Proceedings. 10th Anniversary. IMTC/94. Advanced Technologies in I & M. 1994 IEEE Instrumentation and Measurement Technolgy Conference (Cat. No.94CH3424-9), 2002Accuracy of a laser triangulation sensor have been studied. The experiments showed that the accuracy was dependent on the scattering characteristics of the targets. For the quasi Lambertian surfaces, nonlinearity error was less than 0.1% of the measurement range. >
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Laser Triangulation Range Sensors: A Study of Performance Limitations
Journal of Laser Applications, 1991Optical triangulation is a very old method of determining absolute distance to an object. In recent years laser range sensors utilizing this principle have seen growing use, particularly in the auto industry. More accurate versions are being employed for dimensional inspection operations where the sensor is often mounted on a coordinate measuring ...
Michael Buzinski +2 more
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Solder paste print qualification using laser triangulation
IEEE Transactions on Components, Packaging, and Manufacturing Technology: Part C, 1997A method for determining the printability of a solder paste has been developed using laser triangulation based sensor hardware. The noncontact attribute of this measurement method is ideal for wet print measurements. The effect on material printability of both formulation and process elements are discussed.
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Improved laser triangulation probe design
Infrared and Laser Engineering, 2018张欣婷 Zhang Xinting +3 more
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