Conveners
Instrumentation
- Georg Gassner (SLAC)
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Tse-Chuan Tseng (NSRRC)09/10/2024, 10:35
A simplified hydraulic levelling system (HLS) developing project has been carried out to monitor the ground settlement of TPS tunnel within 10 um resolution in these years. An IR photonic type integration was proposed to meet the requirement. This design consists of simple circuits with separated IR led and phototransistor to sense the water surface variation inside a small chamber installed...
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Joffray Guillory (Conservatoire national des arts et métiers (CNAM))09/10/2024, 11:00
Cnam has developed Arpent, a two-wavelength ADM where the distances do not depend on the air refractive index, but only on the dispersion. By simultaneously measuring two optical path lengths at two different wavelengths, it is no longer necessary to determine the air temperature and pressure. Arpent measures distances consistent with the SI-metre definition and achieves uncertainties better...
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Matthias Saure (Leica Geosystems AG)09/10/2024, 11:25
During IWAA2022 at CERN in Geneva a discussion was raised by laser tracker users about the differences in the handling of orient-to-gravity (OTG) measurements between Leica Absolute Tracker AT403 and AT9x0/AT500.
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The talk will present a new approach for AT9x0 and AT500 in Spatial Analyzer to provide gravity referenced coordinates in the instrument frame to overcome this issue.