DESIGN AND FABRICATION OF THE THERMAL IMAGING SYSTEM FOR TANK SIGHTS

  • Van Huy Mai Faculty of Special Equipment, Le Quy Don Technical University
  • Duy Tuan Le Faculty of Special Equipment, Le Quy Don Technical University
  • Hoang Hai Le Faculty of Special Equipment, Le Quy Don Technical University
  • Thi Tham Nguyen Faculty of Special Equipment, Le Quy Don Technical University
  • Hong Viet Nguyen Weapon Institute, General Department of Defence Industry
Keywords: Thermal objective, thermal imaging system, tank sights, MRTD

Abstract

This study reports the first successful design and fabrication of a thermal imaging sight for tank artillery in Vietnam, utilizing an uncooled detector operating in the long-wave infrared (LWIR) spectrum. The objective lens, consisting of only three spherical elements with a focal length of 100 mm, was evaluated using the modulation transfer function (MTF). The system achieved MTF values approximately 0.5 at a spatial frequency of 30 cycles per millimeter (cycles/mm), approaching the diffraction limit. Measurements of the minimum resolvable temperature difference (MRTD) demonstrate that the sighting system is capable of detecting tank-sized targets at ranges exceeding 2 kilometers.

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Published
2025-11-05
Issue
Vol. 3 No. 02 (2025)
Section
SCIENTIFIC RESEARCH