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    "abstract": "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.",
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        "affiliation": "NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya, Tokyo 157-8510, Japan",
        "name": "Kodai Kikuchi"
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      {
        "affiliation": "NHK Broadcasting Center, 2-2-1 Jinnan, Shibuya, Tokyo 150-8001, Japan",
        "name": "Ryohei Funatsu"
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      {
        "affiliation": "NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya, Tokyo 157-8510, Japan",
        "name": "Tomohiro Nakamura"
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      {
        "affiliation": "NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya, Tokyo 157-8510, Japan",
        "name": "Toshio Yasue"
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      {
        "affiliation": "NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya, Tokyo 157-8510, Japan",
        "name": "Kohei Tomioka"
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      {
        "affiliation": "NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya, Tokyo 157-8510, Japan",
        "name": "Takayuki Yamashita"
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    "docTitle": "8K Camera System with Multi-plane Phase-detection Autofocus",
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      "Phase Detection Autofocus (PDAF)",
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