A fisheye-based optical head which contains eight lens elements was designed and developed for an imaging laser detection system. The field of view is more than 180 degrees in visible and near-infrared (NIR) wavelength. The F/# of the system is less than 3 and the effective focal length is about 2.4 mm which are critical for imaging laser detection systems in the NIR spectrum. The MTF characteristic is more than 0.8 for all angles at the Nyquist frequency. The calibrated (f − θ) distortion is less than 3%, and the relative illumination is more than 92%. All of these values are required to prepare an imaging laser warning system with excellent performance and low false alarm. The performance of the proposed structure is evaluated and analyzed by the ZEMAX optical design software.

设计并开发了一种包含八个透镜元件的基于鱼眼的光学头，用于成像激光检测系统。可见光和近红外（NIR）波长的视野超过180度。系统的F /＃小于3，有效焦距约为2.4毫米，这对于近红外光谱中的成像激光检测系统至关重要。在奈奎斯特频率下，所有角度的MTF特性均大于0.8。校准后的（f  -  θ）畸变小于3％，相对照度大于92％。所有这些值都是制备具有出色性能和低虚警率的成像激光警告系统所必需的。ZEMAX光学设计软件对拟议结构的性能进行了评估和分析。