Development of high-speed InGaAs linear array and camera for OCT and machine vision

Douglas S. Malchow; Robert M. Brubaker; Hai Nguyen; Kevin Flynn

doi:10.1117/12.771540

5 February 2008 Development of high-speed InGaAs linear array and camera for OCT and machine vision

Douglas S. Malchow, Robert M. Brubaker, Hai Nguyen, Kevin Flynn

Proceedings Volume 6890, Optical Components and Materials V; 68900G (2008) https://doi.org/10.1117/12.771540
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Spectral Domain Optical Coherence Tomography (SD-OCT) is a rapidly growing imaging technique for high-resolution visualization of structures within strongly scattering media. It is being used to create 2-D and 3-D images in biological tissues to measure structures in the eye, image abnormal growths in organ tissue, and to assess the health of arterial walls. The ability to image to depths of several millimeters with resolutions better than 5 microns has driven the need to maximize the image depth, while also increasing the imaging speed. Researchers are using short-wave-infrared light wavelengths from 1 to 1.6 microns to penetrate deeper in denser tissue than visible or NIR wavelengths. This, in turn, has created the need to increase the line rates of InGaAs linear array cameras by a factor of ten, while also increasing gain and reducing dead time. This paper will describe the development and characterization of a 1024 pixel linear array with 25 micron pitch and readout rate of over 45,000 lines per second and the resulting camera. This camera will also have application for machine vision inspection of hot glass globs, for sorting of fast moving agricultural materials and for quality control of pharmaceutical products.

Citation Download Citation

Douglas S. Malchow, Robert M. Brubaker, Hai Nguyen, and Kevin Flynn "Development of high-speed InGaAs linear array and camera for OCT and machine vision", Proc. SPIE 6890, Optical Components and Materials V, 68900G (5 February 2008); https://doi.org/10.1117/12.771540

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