DISTANCE DETERMINATION BY GATED VIEWING SYSTEMS TAKING INTO ACCOUNT THE ILLUMINATING PULSE SHAPE

• Published in: Journal of applied spectroscopy Vol. 84; no. 5; pp. 850 - 858
• Main Authors: Gorobets, V.A, Kuntsevich, B.F, Shabrov, D.V
• Format: Journal Article
• Language: English
• Published: Springer 01.11.2017
• ISSN: 0021-9037; 1573-8647
• DOI: 10.1007/s101-017-0-7

For gated viewing systems with triangular and trapezoidal illuminating pulses, we have obtained the range-intensity profiles (RIPs) of the signal as the time delay was varied between the leading edges of the gate pulse and the illuminating pulse. We have established that if the duration of the illuminating pulse [DELTA][t.sub.las] is less than or equal to the duration of the gate pulse [DELTA][t.sub.IC], then the expressions for the characteristic distances are the same as for rectangular pulses and they can be used to determine the distance to objects. When [DELTA][t.sub.las] > [DELTA][t.sub.IC], in the case of triangular illuminating pulses the RIP is bell-shaped. For trapezoidal pulses, the RIP is bell-shaped with or without a plateau section. We propose an empirical method for determining the characteristic distances to the RIP maximum and the boundary points for the plateau section, which we then use to calculate the distance to the object. Using calibration constants, we propose a method for determining the distance to an object and we have experimentally confirmed the feasibility of this method.