A Two-Tap NIR Lock-in Pixel CMOS Image Sensor with Background Light Cancelling Capability for Non-Contact Heart Rate Detection

Cao, Changqing; Shirakawa, Yuya; Tan, Leyi; Seo, Min-Woong; Kagawa, Keiichiro; Yasutomi, Keita; Kosugi, Tomohiko; Aoyama, Satoshi; Teranishi, Nobukazu; Tsumura, Norimichi; Kawahito, Shoji

doi:10.1109/vlsic.2018.8502349

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…In the same manner as two-stage charge-transfer GS pixels [75,75,76], implementing in-pixel charge storages allow CDS operation for lower readout noise. Those lock-in pixels were reported in [60,61,77] for other lock-in pixel applications such as fluorescence lifetime imaging. As described in Sec.2.2, the influence of readout noise to depth pre- cision depends on operating conditions.…”

Section: Storage Designmentioning

confidence: 99%

Lock-in Pixel Based Time-of-Flight Range Imagers: An Overview

Yasutomi

Kawahito

2022

IEICE Trans. Electron.

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Time-of-flight (TOF) range imaging is a promising technology for various applications such as touchless control, augmented reality interface, and automotive. The TOF range imagers are classified into two methods: direct TOF with single photo avalanche diodes and indirect TOF with lock-in pixels. The indirect TOF range imagers have advantages in terms of a high spatial resolution and high depth precision because their pixels are simple and can handle many photons at one time. This paper reviews and discusses principal lock-in pixels reported both in the past and present, including circuit-based and charge-modulator-based lock-in pixels. In addition, key technologies that include enhancing sensitivity and background suppression techniques are also discussed.

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Section: Storage Designmentioning

confidence: 99%

Lock-in Pixel Based Time-of-Flight Range Imagers: An Overview

Yasutomi

Kawahito

2022

IEICE Trans. Electron.

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“…To meet one of the requirements in advanced driver assistance systems, which monitor the driver’s emotions, Cao et al [ 60 ] developed a time-resolved CIS for non-contact heart detection imager was tested under invisible light and enormous ambient light conditions. An NRI LED array is used to detect the HbO 2, i.e., oxyhemoglobin, in human blood.…”

Section: Cmos Image Sensor Applicationsmentioning

confidence: 99%

CMOS Image Sensors in Surveillance System Applications

Sukhavasi

Elleithy

Abuzneid

et al. 2021

Sensors

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Recent technology advances in CMOS image sensors (CIS) enable their utilization in the most demanding of surveillance fields, especially visual surveillance and intrusion detection in intelligent surveillance systems, aerial surveillance in war zones, Earth environmental surveillance by satellites in space monitoring, agricultural monitoring using wireless sensor networks and internet of things and driver assistance in automotive fields. This paper presents an overview of CMOS image sensor-based surveillance applications over the last decade by tabulating the design characteristics related to image quality such as resolution, frame rate, dynamic range, signal-to-noise ratio, and also processing technology. Different models of CMOS image sensors used in all applications have been surveyed and tabulated for every year and application.

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