A UHDTV Camera System With Multiplane Phase-Detection Autofocus

We propose a phase detection autofocus (PDAF) method for three-chip 8K (UHD-2) 240-frame/sec cameras that detects the in-focus position of a lens by using disparity information between pixels with different apertures across multiple sensors. This multiplane PDAF method executes pupil division in the same incident position while using simple metal-shielded pixel technology, which can achieve accurate AF and enable low-cost implementation. The proposed method implemented in a UHD-2 three-chip camera incorporating UHD-2 sensors with half-shielded phase-detection pixels into the blue and red channels demonstrated more robust disparity calculation than the conventional single-chip metal-shielded-based PDAF method.

Print ISSN

1545-0279

Electronic ISSN

2160-2492

Published

2023-03

Content type

Original Research

Keywords

High-speed shooting, metal-shielded sensor, phase detection autofocus (PDAF), three-chip color imaging, UHD-2

DOI

10.5594/JMI.2023.3236021