Direct read-out CMOS camera with applications to full-field optical coherence tomography

Patrick Egan; Fereydoun Lakestani; Maurice Patrick Whelan; Michael J. Connelly

doi:10.1117/12.601003

1 June 2005 Direct read-out CMOS camera with applications to full-field optical coherence tomography

Patrick Egan, Fereydoun Lakestani, Maurice Patrick Whelan, Michael J. Connelly

Author Affiliations +

Proceedings Volume 5823, Opto-Ireland 2005: Imaging and Vision; (2005) https://doi.org/10.1117/12.601003
Event: OPTO-Ireland, 2005, Dublin, Ireland

Abstract

A comprehensive characterisation of a complementary metal-oxide semiconductor (CMOS) and digital signal processor (DSP) camera, used typically in machine vision applications, is presented in this paper. The camera consists of a direct read-out CMOS sensor, each pixel giving a direct analogue voltage output related to light intensity, with an analogue-to-digital converter and digital signal processor on the back-end. The camera operates as a stand-alone device using a VGA display; code being pre-programmed to the onboard random access memory of the DSP. High detection rates (kHz) on multiple pixels were achieved, and the relationship between pixel response time and light intensity was quantified. The CMOS sensor, with 1024x1024 pixels randomly addressable in space and time, demonstrated a dynamic logarithmic light intensity sensitivity range of 120dB. Integrating the CMOS camera with a low coherence Michelson interferometer, optical coherence tomography (OCT) axial depth scans have been acquired. The intended application is an imaging device for simple yet functional full-field optical coherence tomography. The advantages of the CMOS sensor are the potential for carrier-based detection, through the very fast pixel response with under-sampling, and the elimination of the electromechanical lateral scanning of conventional OCT by replacing it with electronic pixel scanning.

Citation Download Citation

Patrick Egan, Fereydoun Lakestani, Maurice Patrick Whelan, and Michael J. Connelly "Direct read-out CMOS camera with applications to full-field optical coherence tomography", Proc. SPIE 5823, Opto-Ireland 2005: Imaging and Vision, (1 June 2005); https://doi.org/10.1117/12.601003

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