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3D imaging is increasingly impacting areas such as space, defense,automation, medical and automotive industries. The most well-known optical 3Dimaging systems are LIDAR systems that rely on Time of Flight (ToF)measurement. The depth resolution of the LIDAR systems is limited by the risetime of the illumination signal, bandwidth of the detector systems, and thesignal-to-noise ratio. The focal gradients can be utilized to obtain 3D imagesfrom 2D camera captures. In this study, we combine the basic LIDAR techniqueswith a physical measurement of focal gradient changes that are caused by thedepth of field, to obtain a high-resolution 3D image using spatially separatedsingle-pixel detectors. The system that we introduce here enables depthresolution that goes beyond the rise time of the incident laser pulse.

Design of a High-Resolution Multifocal LIDAR: Enabling higher resolution beyond the laser pulse rise time