Dynamic visible interferometric measurement of thermal fields around living biological objects

Katherine Creath, Gary E. Schwartz

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

Dynamic interferometry is a highly sensitive means of obtaining phase information that can determine phase at rates of a few measurements per second. The sensitivity of these phase-measurement instruments is on the order of thousandths of a wavelength at visible wavelengths enabling the measurement of small temperature changes and thermal fields surrounding living biological objects. Temperature differences are clearly noticeable using a visible wavelength source because of subtle changes in the refractive index of air due to thermal variations between an object and the ambient room temperature. Living objects can also easily be measured over a period of time to monitor changes as a function of time. This technique has many promising applications in biological and medical sciences for studying thermal fields around living objects. In this paper we compare differences in thermal fields measured with dynamic phase-measuring interferometry surrounding room temperature and body temperature inanimate objects as well as living biological objects at data rates of many measurements per second.

Original languageEnglish (US)
Article number04
Pages (from-to)24-31
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5531
DOIs
StatePublished - 2004
EventInterferometry XII: Techniques and Analysis - Denver, CO, United States
Duration: Aug 2 2004Aug 3 2004

Keywords

  • Biomedical optics
  • Dynamic interferometry
  • Optical instrumentation
  • Phase measurement

ASJC Scopus subject areas

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

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