Airborne Constant Ground Resolution Imaging Optical System Design

• DOI: 10.3390/photonics12040390
• Publication Date: 2025-04-17T04:48:46Z
• Authors: Zhiqiang Yang; Shizhen Gao; Qianxi Chen; Bohan Wu; Qiang Xu; Lei Gong; Lihong Yang
• Keywords: Constant (computer programming)

When an unmanned aerial vehicle (UAV) tilts to capture image of a ground target, variations in object distance may lead uneven resolution distribution, with the focal length ranging from zero full field view. The field-of-view (FFL), which is function view, characterizes optical properties system for each viewing angle. (FFL) quantifies incremental change height resulting marginal rays exiting system, infinitesimal angular at boundary. aberration manifests as effective variation that exhibits field-dependent characteristics. Through systematic calculation and optimization lengths (FFLs) (GR) control, mid-wave infrared (MWIR) has been successfully designed, featuring 10° × 8° view (FOV) F-number 3. implements field-adapted adjustment across distinct angles ensure consistent preservation throughout designed achieves near-diffraction-limited modulation transfer (MTF) performance all dispersion spots consistently confined within Airy disk every demonstrates superior imaging radius, fully complying stringent quality specifications. Featuring compact structural configuration, optimal suitability airborne ground-target reconnaissance applications.