Search results for "Retroreflector"

showing 3 items of 3 documents

Calibration of mobile manipulators using 2D positional features.

2018

International audience; Robotic manipulators are increasingly being attached to Automatic Ground Vehicles (AGVs) to aid in the efficiency of assembly for manufacturing systems. However, calibrating these mobile manipulators is difficult as the offset between the robotic manipulator and the AGV is often unknown. This paper provides a novel, simple, and low-cost method for calibrating and measuring the performance of mobile manipulators by using data collected from a laser retroreflector that digitally detects the horizontal two-dimensional (2D) position of reflectors on an artifact as well as a navigation system that provides the heading angle and 2D position of the AGV. The method is mathem…

0209 industrial biotechnologyOffset (computer science)PoseForm AxRegistrationComputer scienceRobot manipulator02 engineering and technologyBaseArticle03 medical and health sciences[SPI]Engineering Sciences [physics]020901 industrial engineering & automation0302 clinical medicineSensor calibrationOrientationCalibrationYBComputer visionElectrical and Electronic EngineeringInstrumentationRobot-world/hand-eye calibrationClosed form solution Hand-Eye CalibrationSensorbusiness.industryApplied MathematicsNavigation systemSimultaneous Robot-WorldCondensed Matter PhysicsManufacturing systemsHomogeneous Transform EquationsRetroreflector030220 oncology & carcinogenesisSimulated dataXBArtificial intelligenceClosed-form expressionQuaternionsbusinessMeasurement : journal of the International Measurement Confederation
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Evaluation of retro-reflective coating performance by reflectance and perceived relative brightness measurements

2011

Retro-reflective properties of six types and five different colors or retro-reflective materials were discussed in this paper. Reflectance optical indicatrix of samples was determined and compared to obtained psychophyisical data of perceived brightness of human observer. Microscopic structure of the retro-reflective active regions of RR's was studied. Statistically significant differences in reflectivity and brightness of various types and colors of RR's were found.

BrightnessOpticsMaterials scienceCoatingbusiness.industryengineeringObserver (special relativity)engineering.materialbusinessReflectivityRetroreflectorRemote sensingIOP Conference Series: Materials Science and Engineering
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Improved active fiber-based retroreflector with intensity stabilization and a polarization monitor for the near UV.

2021

We present an improved active fiber-based retroreflector (AFR) providing high-quality wavefront-retracing anti-parallel laser beams in the near UV. We use our improved AFR for first-order Doppler-shift suppression in precision spectroscopy of atomic hydrogen, but our setup can be adapted to other applications where wavefront-retracing beams with defined laser polarization are important. We demonstrate how weak aberrations produced by the fiber collimator may remain unobserved in the intensity of the collimated beam but limit the performance of the AFR. Our general results on characterizing these aberrations with a caustic measurement can be applied to any system where a collimated high-qual…

Materials sciencebusiness.industryPolarimetryCollimator02 engineering and technology021001 nanoscience & nanotechnologyPhysical optics01 natural sciencesAtomic and Molecular Physics and OpticsCollimated lightRetroreflectorlaw.invention010309 opticsOpticslaw0103 physical sciencesM squared0210 nano-technologybusinessCircular polarizationGaussian beamOptics express
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