ABSTRACT: Gun scopes equipped with uncooled thermal imaging sensors operating in the LWIR (Long-Wave Infrared) range of 8–12 μm are advanced optical devices essential for military and law enforcement applications. These forces operate in extreme environments, from freezing mountain ranges to scorching deserts, requiring equipment that performs reliably under all conditions. This paper presents an athermal optical design for a Gun scope optimized for extreme temperatures ranging from -10°C to +60°C. A near-focus analysis is conducted at 10 m for a temperature of 20°C, as well as across the full temperature range........
Keywords: Thermal imaging systems, Gun scope, Uncooled microbolometer sensor, SYNOPSYSTM, Aspheric surface, Nyquist frequency, Polychromatic Modulation Transfer Function (MTF), Diffraction-limited, Chromatic aberration, Optical Path Difference (OPD), Strehl ratio, Athermalization, Active Athermalization, Near focus
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