Optical Fiber Pyrometer Designs for Temperature Measurements Depending on Object Size Articles uri icon

publication date

  • January 2021

start page

  • 646


  • 2


  • 21

International Standard Serial Number (ISSN)

  • 1424-3210

Electronic International Standard Serial Number (EISSN)

  • 1424-8220


  • The modelling of temperature measurements using optical fiber pyrometers for different hot object sizes with new generalized integration limits is presented. The closed equations for the calculus of the radiated power that is coupled to the optical fiber for two specific scenarios are proposed. Accurate predictions of critical distance for avoiding errors in the optical fiber end location depending on fiber types and object sizes for guiding good designs are reported. A detailed model for estimating errors depending on target size and distance is provided. Two-color fiber pyrometers as a general solution are also discussed.


  • Electronics


  • optical fiber pyrometer; temperature measurement; object size effect