8K Camera System with Multi-plane Phase-detection Autofocus

We propose a phase detection autofocus (PDAF) method for three-chip 8K UHDTV2 240-fps cameras that detects the in-focus position of a lens by using disparity information between pixels with different apertures across multiple sensors. This multi-plane 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 an 8K three-chip camera incorporating 8K sensors with half-shielded phase-detection pixels into the blue and red channels demonstrated robust disparity calculation compared with the conventional single-chip metal-shielded-based PDAF method.

Published

2021-11

Content type

Original Research

Keywords

Phase detection autofocus, metal-shielded sensor, three-chip color imaging, 8K UHDTV2, high-speed shooting

DOI

10.5594/M001939