| 摘要 |
A method is disclosed for the optical remote measurement of the pressure of the air at a distance by laser excitation in which backscattered radiation is caused by means of a laser generator with very fine spectral line and by excitation of an absorption spectral line of molecular oxygen, the backscattered energies are measured at two different distances, the ratio of these energies is determined, a coefficient of absorption is derived therefrom depending on the temperature and the molecular density of oxygen and the density and so the pressure are calculated. An absorption spectral line is excited belonging to a Schumann-Runge band of molecular oxygen and the absorption spectral line is very wide with respect to the Rayleigh diffusion spectrum.
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