Track-and-Tune Light Field Image Sensor

Author

Varghese, Vigil ; Xinyuan Qian ; Shoushun Chen ; Shen ZeXiang ; Tao Jin ; Liang Guozhen ; Qi Jie Wang

Author_Institution

VIRTUS IC Design Centre of Excellence, Nanyang Technol. Univ., Singapore, Singapore

Volume

14

Issue

12

fYear

2014

fDate

Dec. 2014

Firstpage

4372

Lastpage

4384

Abstract

In this paper, we present a new technique for determining the angle of incident light using an image sensor. This technique makes use of two distinct pixel types for simultaneous coarse angle estimation and fine angle detection. A new type of pixel structure, the quadrature pixel cluster is introduced, which produces response that varies linearly with incident light angle. The proposed technique greatly reduces the overall sensor complexity and is very area efficient compared with the previous work on angle detection. The sensor is fabricated in 65-nm mixed-signal CMOS process and can accurately distinguish between angles in the range from -35° to +35°.

Keywords

CMOS image sensors; angular measurement; mixed analogue-digital integrated circuits; optical sensors; coarse angle estimation; fine angle detection; mixed-signal CMOS process; pixel structure; quadrature pixel cluster; size 65 nm; track-and-tune light field image sensor; Dielectrics; Gratings; Metals; Photodiodes; Talbot effect; Three-dimensional displays; Angle detection; CMOS image sensor; light field sensor; linear angle sensitive pixels; quadrature pixel cluster; track-and-tune angle detection;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2014.2335061

Filename

6853322