Infrared search and track (IRST) for long-range, wide-area detect and avoid (DAA) on small unmanned aircraft systems (sUAS)

Snarski, Stephen R.; Barnes, R. G.; Khan, Noel; Baker, Jonathan B.; Webb, Jeff

doi:10.1117/12.2618065

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The problem will become more complicated once zoom or a changeable field of view (FOV) is required [7]. A special kind of cascaded optics, which has an afocal zoom telescope with an external exit pupil, an imaging objective with an external entrance pupil, and an FSM set at the location of the inner pupil, can be used to meet a long focal length and variable magnification and solve the aforementioned problem [8][9][10][11][12]. Therefore, the design of such IRST to realize small image wandering comes into consideration.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Infrared Search and Track System with Afocal Zoom Telescope

Qu,

Zhang,

Yang

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

The infrared search and track system (IRST) is a type of special electrical optical (EO) system that can be used in various scenarios to fulfill situation awareness, reconnaissance, and tracking of targets. We proposed a homogeneous coordinate transformation method to analyze the residual image wandering induced by the rotation of the scanning platform and the compensation fast steering mirror and help with the commonly trivial selection of the telescope magnification and the objective focal length. The analysis and simulation are carried out with specified IRST optics, which adopt a 640 × 512 array and 15 μm pitch detector, in a focal range of 60 mm~360 mm, and a scan speed of 360°/s to 60 °/s at 50 fps, and optical specifications are determined further. The presented optical system, with only three kinds of common infrared materials, works at 3.7 μm~4.8 μm, demonstrates good image performance and tolerance characteristics, and shows potential in manufacturing. Also, the resulting image wandering of 8 μm, less than a 0.6-pixel size, at an integral time of 16 ms, proves the correctness of the method and makes the scheme of considerable interest for electrical optical systems.

show abstract