Simultaneous acquisition of thermal and visible images in a scanning infrared camera

Shahram Hejazi, Omid A. Moghadam, Robert A.M.D. Spangler, Michael Anbar

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A scanning imaging system that simultaneously generates visual or near-infrared (NIR, < 2 μm) and far infrared (FIR, 8 to 12 μm) digitized images is described. The visible or NIR images are presentations of reflected radiation at the corresponding wavelengths. The FIR emission is calibrated with thermostated black bodies to yield a thermal image. The system was designed to produce twin images, with identical perspective and scale factor, that can be overlayed to allow unambiguous identification of the observed object and precise location of thermal features on the observed object. This system has a variety of uses, especially in clinical applications of telethermometry. The visual imaging system is designed to use the same optical scanning configuration as that which generates the thermometric data. The camera's optical scanning system is described, as are the electronics of the imaging system, including the design of the photodiode amplifier, pixel trigger generator, digitizer and the computer interface circuits. A few experimental images taken by this system are also presented.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Number of pages7
ISBN (Print)0819412694, 9780819412690
StatePublished - 1993
Externally publishedYes

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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