CMOS image sensor for the analysis of fast moving luminous objects

Benaissa Bellach; Bernard Lamalle; Lew F.C. Lew Yan Voon; Guy Cathebras

doi:10.1117/12.516752

1 August 2003 CMOS image sensor for the analysis of fast-moving luminous objects

Benaissa Bellach, Bernard Lamalle, Lew F.C. Lew Yan Voon, Guy Cathebras

Proceedings Volume 4948, 25th International Congress on High-Speed Photography and Photonics; (2003) https://doi.org/10.1117/12.516752
Event: 25th international Congress on High-Speed photography and Photonics, 2002, Beaune, France

Abstract

We present an image sensor dedicated to the analysis of fast moving luminous objects. The circuit is fabricated in standard 0.6 μm CMOS technology with an image sensing array of 64 x 64 pixels. Its working principle is as follows: An electronic unit integrated at the pixel level measures the elapsed time since the beginning of the acquisition till the passage of the luminous object in front of the pixel under consideration. This value that corresponds to a number of clock cycles is stored in a 4-bit memory at the pixel level and translated into a gray level, the brighter ones corresponding to the shortest time. The result is a 16-gray level image that represents the trajectory and direction of motion of the object. Knowing the frequency of the clock, the distance between the pixels and the difference in gray levels of the pixels, the speed of the moving object can be determined. Alternatively, the 16-gray level image can be considered as a superposition of 16 one gray level images that represent the 16 positions of the moving object at 16 different time instances in the course of its displacement. The frequency of the clock can be as high as 20 MHz for the analysis of very high speed phenomena. The working principle and the architecture of the image sensor will be described in details in this paper. Moreover, the results of the tests carried out on the circuit, namely the analysis of the movement of the spot on an oscilloscope screen, will also be reported and the potential applications of the image sensor discussed.

Citation Download Citation

Benaissa Bellach, Bernard Lamalle, Lew F.C. Lew Yan Voon, and Guy Cathebras "CMOS image sensor for the analysis of fast-moving luminous objects", Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); https://doi.org/10.1117/12.516752

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Clocks

Image sensors

Double positive medium

Transistors

CMOS sensors

Logic

Show All Keywords

Keywords/Phrases

Search In:

Publication Years