The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Multi-wavelength infrared imaging computer systems and applications
Author:	Li, Jun
View Online:	njit-etd1997-068 (xv, 147 pages ~ 7.3 MB pdf)
Department:	Department of Computer and Information Science
Degree:	Doctor of Philosophy
Program:	Computer and Information Science
Document Type:	Dissertation
Advisory Committee:	Hou, Edwin (Committee chair) Ng, Peter A. (Committee member) Shi, Yun Q. (Committee member) Hung, Daochuan (Committee member) Chang, Timothy Nam (Committee member)
Date:	1997-05
Keywords:	Infrared imaging--Data processing. Thermography.
Availability:	Unrestricted
Abstract:	This dissertation presents the development of three computer systems for multi-wavelength thermal imaging. Two computer systems were developed for the multi-wavelength imaging pyrometers (M-WIPs) that yield non-contact temperature measurements by remotely sensing the surface of objects with unknown wavelength-dependent emissivity. These M-WIP computer systems represent the state-of-art development in remote temperature measurement system based on the multi-wavelength approach. The dissertation research includes M-WIP computer system integration, software development, performance evaluation, and also applications in monitoring and control of temperature distribution of silicon wafers in a rapid thermal process system. The two M-WIPs are capable of data acquisition, signal processing, system calibration, radiometric measurement, parallel processing and process control. Temperature measurement experiments demonstrated the accuracy of ±1°C against blackbody and ±4°C for colorbody objects. Various algorithms were developed and implemented, including real-time two-point non-uniformity correction, thermal image pseudocoloring, PC to SUN workstation data transfer, automatic IR camera integration time control, and radiometric measurement parallel processing. A third computer system was developed for the demonstration of a 3-color InGaAs FPA which can provide images with information in three different IR wavelength range simultaneously. Numbers of functions were developed to demonstrate and characterize 3-color FPAs, and the system was delivered to be used by the 3-color FPA manufacturer.