INSTITUTE OF INFORMATION TECHNOLOGIES - BAS
Cybernetics and Information Technologies
Volume 6, No 3. Sofia, 2006, Bulgarian Academy of Sciences
A Working Distance Formula for Night Vision Devices Quality Preliminary Information
Daniela Borissova, Ivan Mustakerov
Institute of Information Technologies, 1113 Sofia
E-mails: dborissova@iit.bas.bg, mustakerov@iit.bas.bg
Abstract:
A night vision devices working distance formula is proposed taking into account essential parameters of the optoelectronic channel elements and the external conditions. Using the Johnson criterion, a parameter “reduced target area” is used. That parameter allows calculating of the different types of working distance – detection, orientation, recognition, identification, for different types of objects. The relevant formulae give a theoretical information about the night vision devices working distance on the design stage before a prototype producing and they reduce testing “trial and error” costs. An experimental comparison between a calculated through the proposed formula standing man detection range and some catalogue data and between the calculated standing man recognition range and a measured recognition range from the night vision goggles “Prilep” testing is shown.
Keywords:
night vision devices, working distance– detection, orientation, recognition, identification, preliminary information, theoretical formulae, “reduced target area”.