Abstract
We investigate the propagation characteristics of a pulse laser in a
time-of-flight laser range finder (TOF-LRF) system with variations in atmospheric
conditions, such as temperature, pressure, relative humidity, and the concentration
of <TEX>$CO_2$</TEX>. The measurement error of distance related with the
group velocity change in the TOF-LRF system is analyzed by considering the
refractive index of the standard atmosphere with variations in atmospheric
conditions. The dependence of the pulse width broadening induced by chromatic
dispersion of the standard atmosphere on the operating wavelength and the initial
pulse width of the light sources is discussed. The transmission of air with
variations in the relative humidity or the concentration of
<TEX>$CO_2$</TEX> is analyzed by using different values of absorption
coefficients depending on the operation wavelength of the light source in the
TOF-LRF system.
© 2015 Optical Society of Korea
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