To　address　the　operational　requirements　of　unmanned　aerial　vehicle　applications　in　low　light　level　and　to　resolve　the　limitations　of　traditional　fisheye　lenses,　such　as　small　optical　system　aperture　size,　non-uniform　illumination　across　fields　of　view,　and　image　plane　defocusing　under　extreme　temperature　environments,　we　propose　an　optical　design　method　to　enhance　image　plane　relative　illumination.　Based　on　the　principle　of　equidistant　projection　of　spherical　objects,　a　compact　glass-plastic　hybrid　fisheye　lens　was　developed　for　unmanned　aerial　vehicle　mounted　low　light　level　night　vision　systems.　By　positioning　the　aperture　stop　as　close　as　feasible　to　the　rear　of　the　optical　system,　a　full　field　relative　illumination　exceeding　83.5%　is　achieved.　The　lens　features　a　focal　length　of　3.6　mm,　a　field　of　view　of　170°,　and　an　F-number　of　1.8,　with　dual-band　operability　in　visible　and　near-infrared　bands.　Through　the　optical　passive　athermalization　design,　it　maintains　a　modulation　transfer　function　greater　than　0.3　at　the　Nyquist　frequency　within　a　temperature　range　spanning　from-40°C　to　80°C.　The　maximum　defocus　is　limited　to　2.222　μm,　well　within　the　depth　of　focus　of　3.564　μm.　Furthermore,　the　full　field　of　view　spot　radius　remains　below　4　μm,　and　the　image　plane　exhibits　uniform　illumination　without　edge　darkening.　This　design　demonstrates　compactness,　stable　imaging　performance,　and　potential　for　unmanned　aerial　vehicle　reconnaissance　and　target　tracking　applications.　　©　2025　COPYRIGHT　SPIE.　Downloading　of　the　abstract　is　permitted　for　personal　use　only.