Design of a High-Resolution Multifocal LIDAR: Enabling Higher Resolution Beyond the Laser Pulse Rise Time

Urkmen K., Yüce E.

IEEE Transactions on Instrumentation and Measurement, cilt.72, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 72
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1109/tim.2023.3241051
  • Dergi Adı: IEEE Transactions on Instrumentation and Measurement
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Business Source Elite, Business Source Premier, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Detectors, Laser radar, Optical imaging, Signal resolution, Time measurement, Optical variables measurement, Optical design, Depth of field, LIDAR, multifocal imaging, DEPTH
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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