Mudge Jason
Appl Opt. 2019 Oct 1;58(28):7921-7928. doi: 10.1364/AO.58.007921.
In many active optical systems where the light is supplied, such as a range finder or optical radar, there is a possibility that the detector (pixel) can be destroyed if significant signal is returned or at the very least blinded for a period of time. This is because the designer struggles with the "one over range squared" loss, which can amount to significant attenuation in the return signal, given the range requirements. When pushing the range limit requirement, the sensor is in need of a large dynamic range detector and/or some form of detector protection when the target is quite close. There is then a search for a range-compensating lens. This work proposes a lens that attempts to compensate for range signal loss passively and instantaneously by combining lens elements in parallel rather than in series, as is typically done. The proposed lens is relatively simple, compensates for range, albeit not perfectly, and has its own drawbacks.
在许多有源光学系统中，例如测距仪或光学雷达，若有显著信号返回，探测器（像素）就有可能被损坏，或者至少会在一段时间内致盲。这是因为设计者面临“距离平方分之一”损耗的问题，鉴于距离要求，这种损耗会导致返回信号出现显著衰减。当提高距离极限要求时，传感器就需要一个大动态范围探测器和/或在目标非常接近时的某种形式的探测器保护。于是人们开始寻找一种距离补偿透镜。这项工作提出了一种透镜，它试图通过将透镜元件并联而非像通常那样串联来被动且即时地补偿距离信号损耗。所提出的透镜相对简单，能补偿距离，尽管并不完美，且有其自身的缺点。
