- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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A CMOS-Based Thermopile Array Fabricated on a Single SiO2 Membrane
摘要： We present a novel thermopile-based infrared (IR) sensor array fabricated on a single CMOS dielectric membrane, comprising of poly-silicon p+ and n+ elements. Processing of the chip is simplified by fabricating the entire array on a single membrane and by using standard CMOS Al metal layers for thermopile cold junction heatsinking. On a chip area of 1.76 mm × 1.76 mm, with a membrane size of 1.2 mm × 1.2 mm, we fabricated IR sensor arrays with 8 × 8 to 100 × 100 pixels. The 8 × 8 pixel device has <2% thermal crosstalk, a responsivity of 36 V/W and enhanced optical absorption in the 8–14 μm waveband, making it particularly suitable for people presence sensing.
关键词： IR image sensor,presence sensing,thermopile array,MEMS,infrared,CMOS
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE 18th International Conference on Bioinformatics and Bioengineering (BIBE) - Taichung, Taiwan (2018.10.29-2018.10.31)] 2018 IEEE 18th International Conference on Bioinformatics and Bioengineering (BIBE) - Sigma-Delta ADC for Image Sensor in Virtual and Augmented Reality Camera to Medical Training
摘要： This article presents a continuous time lowpass sigma-delta ADC for wide field of view (FOV) image sensor with a chain of integrators and with capacitive feedforward summation (CICFF) plus circuit which for implementation in low power applications. The summation of feedforward signals is achieved by capacitors plus, without the essential thing of any extra active components which can be used in virtual reality (VR) and augmented reality (AR) camera. The quantizer uses a comparator which can achieve high linearity easily. The chip was implemented in 1.8 V supply voltage which works as a part of CMOS active-pixel image sensor with global shutter and high dynamic range (HDR) operation. The proposed idea can support medical training.
关键词： Sigma-Delta ADC,Medical Training,Image Sensor,Augmented Reality
更新于2025-09-04 15:30:14
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[Papers] A Multi Spectral Imaging System with a 71dB SNR 190-1100 nm CMOS Image Sensor and an Electrically Tunable Multi Bandpass Filter
摘要： This paper demonstrates a multi spectral imaging system utilizing a linear response, high signal to noise ratio (SNR) and wide spectral response CMOS image sensor (CIS), and an electrically tunable multi bandpass optical filter with narrow full width at half maximum (FWHM) of transmitted waveband. The developed CIS achieved 71dB SNR, 1.5 × 107 e– full well capacity (FWC), 190-1100nm spectral response with very high quantum efficiency (QE) in near infrared (NIR) waveband using low impurity concentration Si wafer (~1012 cm-3). With the developed CIS, diffusion of 5mg/dl glucose into physiological saline solution, as a preliminary experiment for non-invasive blood glucose measurement, was successfully visualized under 960nm and 1050nm wavelengths, at which absorptions of water molecules and glucose appear among UV to NIR waveband, respectively.
关键词： bandpass filter,CMOS image sensor,FWC,multi spectral imaging,SNR,absorption analysis
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE 7th Global Conference on Consumer Electronics (GCCE) - Nara, Japan (2018.10.9-2018.10.12)] 2018 IEEE 7th Global Conference on Consumer Electronics (GCCE) - Design of Compact and Vibration Resistant Receiver for Visible Light Communication Using MEMS mirror
摘要： We propose a compact and vibration-resistant receiver for visible light communication (VLC) between vehicles, where the vibration of the vehicle becomes a barrier for reliable communication. To address this problem, we designed a VLC receiver with a micro mirror, an inertial measurement unit (IMU), and an image sensor. A fast-blinking light is scanned by micro mirror and captured by image sensor efficiently, and the micro mirror controlled by IMU cancels the effect of motion of the vehicle. The performance of the proposed receiver is evaluated in experiments. The obtained results suggest that the proposed receiver is suitable for vibration environment.
关键词： Image sensor,Visible light communication,MEMS scanner mirror
更新于2025-09-04 15:30:14
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Interpixel Interference Mitigation in Visible Light Communication Using Image Sensor
摘要： To improve the data rate in a camera-based visible light communication system, multiple LEDs in an LED array are used to transmit multiple bits in one frame. The problem is that LEDs are always captured in the image with some degree of blooming effect. This effect increases the intensity of pixels surrounding the origin LEDs in the image. When multiple LEDs are used, the blooming effect from all LEDs causes the interpixel interference (IPI) problem that greatly degrades the quality of the received signal. This paper analyzes the blooming effect and finds that the IPI problem increases when the number of "ON" LEDs in the array increases. Through the analysis, this paper proposes a differential coding to minimize the number of "ON" LEDs in every transmitted frame and thus minimize the IPI effect. The proposed scheme is then verified through simulations. The results show that a lower bit error rate, which indicates a better signal quality, can be achieved by applying the proposed scheme.
关键词： image sensor,VLC,differential coding,LED,interference
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE 18th International Conference on Bioinformatics and Bioengineering (BIBE) - Taichung, Taiwan (2018.10.29-2018.10.31)] 2018 IEEE 18th International Conference on Bioinformatics and Bioengineering (BIBE) - Nonlinear CMOS Image Sensor with SOC Integrated Local Contrast Stretch for Bio-Microfluidic Imaging
摘要： a nonlinear single-slope ADC with SOC integrated local contrast stretch using a configurable multi-frequency counter for bio-microfluidic imaging is presented in this paper. Compared with the conventional off-chip global contrast stretching algorithm, this method does not degrade image quality at the interested light intensity range (cell) at the cost of unconsidered range (sheath fluid) and can be integrated into CMOS image sensor directly. Meanwhile, this method provides higher precision of cell image for the later super-resolution reconstruction. The simulation results indicate that more details of cell image can be obtained in this method.
关键词： contrast stretch,CMOS image sensor,point-of-care (POC) diagnosis,bio-microfluidic imaging
更新于2025-09-04 15:30:14