Vol. 30, issue 04, article # 4

Abstract:

In the present work, results of experimental investigations into the influence of turbid media (fog, smoke) on the quality of image of objects observed through them using active pulsed OES operating in the modes with constantly open receiver and controllable receiver (in the mode of selection of backscattered noise signal) are considered. It is experimentally confirmed that in the active pulsed OES with selection of backscattered noise signal, the quality of images of objects screened by turbid media can be almost 10 times higher than in the case of their operation with constantly open receiver. The image quality of objects in systems of vision with controllable reception is influenced not only by the optical length of the observation path but also by such characteristics as the average sizes of particles and their scattering and absorbing properties.

Keywords:

active pulsed OES with controllable receiver, frequency-contrast characteristics, mires, smoke, fog, laboratory experiments

References:

1. Wolf W.L. The Infrared System. Design Process // Photon. Spectra. 2001. N 3. P. 191–202.
2. Patent EP 0 468 175 A2, 29.01.92.
3. Belov V.V. Statistical modeling of imaging process in active night vision systems with gate-lught detection // Appl. Phys. B. 2002. V. 75, N 4–5. P. 571–576.
4. Belov V.V., Matvienko G.G., Pak R.Ju., Shijanov D.V., Kirpichenko R.Ju., Kurjachij M.I., Pustynskij I.N., Shurygin Ju.A.  Aktivnye TV-sistemy videnija s selekciej fonov rassejanija // Datchiki i sistemy. 2012. N 3. P. 25–30.
5. Volkov V.G. Metody modernizacii aktivno-impul'snyh priborov nochnogo videnija // Priborostroenie. Jelektrotehnika. Radiotehnika. Jelektronika. 2011. N 4. P. 60–63.
6. Andersen J.F., Busck J., Heiselberg H. Long distance high accuracy 3-D laser radar and person identification // Proc. SPIE. 2005. V. 5791. P. 9–16. DOI: 10.1117/ 12.604345.
7. Ofer D., Norman S.K., Boaz W. Range gated active night vision system for automobiles //Appl. Opt. 2006. V. 45, N 28. Р. 7248–7254.
8. Busck J. Underwater 3-D optical imaging with a gatedviewing laser radar // Opt. Eng. 2005. V. 44, N 11. P. 116001-1—116001-7. DOI: 10.1117/1.2127895.
9. Rahimov R.F., Kozlov V.S., Shmargunov V.P. O vremennoj dinamike kompleksnogo pokazatelja prelomlenija i mikrostruktury chastic po dannym spektronefelometricheskih izmerenij v smeshannyh dymah // Optika atmosf. i okeana. 2011. V. 24, N 10. P. 887–897; Rakhimov R.F., Kozlov V.S., Shmargunov V.P. On time dynamics of the complex refractive index and particle microstructure according to data of spectronephe-lometer measurements in mixed-composition smokes // Atmos. Ocean. Opt. 2012. V. 25, N 1. P. 51–61.
10. Rahimov R.F., Kozlov V.S., Tumakov A.G., Shmargunov V.P. Opticheskie i mikrofizicheskie svojstva piroliznogo dyma po dannym izmerenij 4-volnovym poljarizacionnym spektronefelometrom // Optika atmosf. i okeana. 2013. V. 26, N 12. P. 1045–1053.
11. Burdun G.D., Markov B.N. Osnovy metrologii: Uch. posobie dlja vuzov, izd. 3-e, pererabotannoe. M.: Izd-vo standartov, 1985. 256 p.