Mudge Jason
Appl Opt. 2020 Jul 10;59(20):6076-6084. doi: 10.1364/AO.395584.
There are many trades to be made when designing an optical system. In this work, an incoherent optical detection sensor (often referred to as an energy- or direct-detection sensor, or a time-of-flight LiDAR) is designed at the sensor or top level using newly developed tools [Appl. Opt.59, 1939 (2020)APOPAI0003-693510.1364/AO.384135]. While incoherent detection sensors, relative to coherent frequency or phase-modulated sensors, are not as useful in cluttered environments, they have their place due to their simplicity and high performance in uncluttered or lightly cluttered environments. In this particular design, a nontraditional receive lens is utilized that has the unique ability to adjust the amount of return signal placed on the detector based on target range, i.e., a range-compensating lens (RCL) [Appl. Opt.58, 7921 (2019)APOPAI0003-693510.1364/AO.58.007921]. Only a two-element RCL is utilized in this work, but it proves the ability to shape the return signal gauging the changes in the stochastic performance, paving the way to a multi-element RCL for additional design freedom in shaping.
在设计光学系统时需要进行许多权衡。在这项工作中，使用新开发的工具[《应用光学》59, 1939 (2020)；APOPAI0003 - 6935；10.1364/AO.384135]在传感器或顶层设计了一种非相干光学检测传感器（通常称为能量检测或直接检测传感器，或飞行时间激光雷达）。虽然相对于相干频率或相位调制传感器，非相干检测传感器在杂乱环境中不太有用，但由于其简单性以及在无杂乱或轻度杂乱环境中的高性能，它们仍有自己的用武之地。在这个特定设计中，使用了一种非传统的接收透镜，它具有独特的能力，即能够根据目标距离调整放置在探测器上的返回信号量，也就是一种距离补偿透镜（RCL）[《应用光学》58, 7921 (2019)；APOPAI0003 - 6935；10.1364/AO.58.007921]。在这项工作中仅使用了双元件RCL，但它证明了能够通过测量随机性能的变化来塑造返回信号，为多元件RCL在塑造方面提供更多设计自由度铺平了道路。
