Title :
Camera pixel for coherent detection of modulated light
Author :
Dmochowski, P.R. ; Hayes-Gill, B.R. ; Clark, M. ; Crowe, J.A. ; Somekh, M.G. ; Morgan, S.P.
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. of Nottingham, UK
Abstract :
A CMOS pixel with local processing suitable for use in a modulated light camera is described. The pixel was designed to detect sinusoidally modulated light within the frequency range of 500 kHz-25 MHz. It consists of a photodiode, a transimpedance amplifier, a mixer and an active 150 Hz bandpass filter. It is a prototype design capable of further size reduction suitable for tiling into an array for imaging purposes. This allows the modulated light component of a frequency far in excess of the frame rate to be detected at the pixel level.
Keywords :
CMOS image sensors; cameras; optical arrays; optical modulation; prototypes; 150 Hz; 500 kHz to 25 MHz; CMOS pixel; active bandpass filter; camera pixel; coherent detection; mixer; modulated light camera; modulated light component; photodiode; pixel level; sinusoidally modulated light; size reduction; transimpedance amplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20046534
