A CMOS image sensor that employs a vertically integrated double junction photodiode structure is presented. This allows colour imaging with only two, wider bandwidth, filters. The sensor uses a 184 x 154 6-transistor pixel array at a 9.6 μm pitch. Results of the device characterisation, and colour image reconstruction using the prototype sensor, are presented.

We present a 6464-pixel CMOS image sensor chip that can acquire a 16-gray-level image containing both spatial and temporal information of the moving luminous object under observation. The image can next be processed using any image processing software in order to determine the speed, trajectory, and direction of motion of the moving object. The architecture of the sensor and an example of its a...

This paper presents the experimental noise characteristics of avalanche photodiodes (APDs) fabricated in different CMOS technologies, showing the possibility to achieve a low noise factor as a consequence of dead-space effect. The example application of a CMOS range image sensor based on gain-modulated APDs is presented and the perspectives for a future development of APD image sensors are disc...

This paper addresses the development of a micropower 176 144 CMOS active pixel image sensor that dissipates one to two orders of magnitude less power than current state-of-the-art CMOS image sensors. The chip operates from a 1.5-V voltage source and the power consumption measured for the chip running from an internal 25.2-MHz clock yielding 30 frames per second is about 550 W. This amount enabl...

In this paper, architectures for low-noise high-speed image sensors based on 3D stacking technology are discussed. Effectiveness of the 3D-stacking technology for low-noise high-speed image sensors is demonstrated in an implementation of a 33Mpixel 240fps 3D-stacked CMOS image sensor based on 12b 3-stage cyclic-based pipelined ADCs. For extremely low noise and wide dynamic range imaging, highly...

Polarization sensing is one of the important optical measurement scheme used in various scientific and industrial applications. For instance, an optical rotation measurement is widely used to measure chirality of chemical species. The polarization of light is modulated when the light propagates the optically active material such as saccharide or protein. Polarization rotation reflects concentra...

Modern "smart" CMOS sensors have penetrated into various applications, such as surveillance systems, bio-medical applications, digital cameras, cellular phones and many others. Reducing the power of these sensors continuously challenges designers. In this paper, a low power global shutter CMOS image sensor with Wide Dynamic Range (WDR) ability is presented. This sensor features several power re...