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30 September 2003 Portable laser rangefinder short-pulse measurements
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Abstract
A portable laser rangefinder, capable to measure ranges up to 1,200 m, implies the measurement of time intervals ranging between some tens of ns and some tens of μs with an accuracy of less than 1 ns. Taking into account that laser pulse rate is low (1...10 kHz) our solution was the time expansion in few stages followed by a classical time interval measurement. We actually expanded the time range 100 ns ÷ 10 μs into the range 25 μs ÷ 2.5 ms and the new time interval is measured using a 5 MHz quartz driven clock. The measurement accuracy is then 0.42 ns.
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Ion I. Munteanu and Sorin Miclos "Portable laser rangefinder short-pulse measurements", Proc. SPIE 5227, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies, (30 September 2003); https://doi.org/10.1117/12.520112
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