Optical quality assessment of rigid endoscopes during clinical lifetime

Herke Jan Noordmans*, Ijen Van Mil, Said Daoudi, Sander Kruit, Henk Den Van Brink, Rudolf Verdaasdonk

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

4 Citations (Scopus)
31 Downloads (Pure)


An endoscope test bench is presented to test the optical quality of endoscopes on a regular basis to assure optimal image quality during surgery. A power LED and a photo diode are used to measure the transmission of the illumination fibers. Captures of target images displayed on a LCD screen as seen through the endoscope with a high resolution camera are analyzed to determine the contrast for different spatial line pairs. Transmission and contrast plots are compared to reference data to determine whether an endoscope is still acceptable for clinical application. Results show that endoscopes degrade gradually but steadily over time. In time a large database of various types of endoscope will be built to fine-tune the criteria for approval or rejection of the endoscopes.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 8 May 2006
Externally publishedYes
EventEndoscopic Microscopy 2006 - San Jose, United States
Duration: 22 Jan 200622 Jan 2006

Publication series

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


ConferenceEndoscopic Microscopy 2006
Country/TerritoryUnited States
CitySan Jose


  • Contrast graph
  • Endoscopy
  • Quality assurance


Dive into the research topics of 'Optical quality assessment of rigid endoscopes during clinical lifetime'. Together they form a unique fingerprint.

Cite this