16 January 1988 On The Use Of An Optomechanical Sensing Head In Time-Of-Flight Laser Rangefinding
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Proceedings Volume 0952, Laser Technologies in Industry; (1988) https://doi.org/10.1117/12.968863
Event: Laser Technologies in Industry, 1988, Porto, Portugal
The time-of-flight (TOF) laser rangefinding technique has recently found many applications for industrial measurement purposes. The electronics of a rangefinder can be separated from the sensing head using optical fibres. In spite of many advantages such as non-sensitivity to demanding environments, optical fibres also introduce some potential measurement errors. To analyze the effects on performance of using long optical fibres in pulsed TOF rangefinding, an experimental laser rangefinder intended especially for the measurement of to-and-fro motion was developed. The rangefinder has a separate optomechanical sensing head, which is connected to the electronic unit by a shielded cable containing the transmitter and receiver fibres. The transmitter has a pulse repetition rate of 1.3 MHz and the receiver includes a high speed transimpedance preamplifier and automatic gain control electronics. An analogue time-to-amplitude converter is employed to obtain high speed, high resolution measurement. The performance of the rangefinder with different fibre lengths is analysed here, concen-trating mainly on the resolution and differential non-linearity, the integral non-linearity being of less significance due to the AC nature of the measurement.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Koskinen, M. Koskinen, R. Ahola, R. Ahola, J. Kostamovaara, J. Kostamovaara, R. Myllyla, R. Myllyla, "On The Use Of An Optomechanical Sensing Head In Time-Of-Flight Laser Rangefinding", Proc. SPIE 0952, Laser Technologies in Industry, (16 January 1988); doi: 10.1117/12.968863; https://doi.org/10.1117/12.968863

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