A laser-scanning endoscope based on polysilicon micromachined mirrors with enhanced attributes

M. George*, H. Albrecht, M. O. Schurr, P. Papageorgas, U. Hofmann, D. Maroulis, C. Depeursinge, D. Iakkovidis, N. Theofanous, A. Menciassi

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


A miniaturized laser scanning endoscope is presented which makes use of three lasers to illuminate a sample with a red, a green and a blue wavelength simultaneously. Scattered light from the sample is descanned and chromatically separated into the three channels for detection and postprocessing to compose a color image. The scanning subsystem consists of two micro-electro-mechanical mirrors suitable for mass production. The endoscope head can be assembled fast and at low cost. A resolution of the order of 16 lines per mm is achieved for a working distance common in endoscopy. Considerations of the system design include the operation of the mico mirrors, the filtering of reflected light by using polarization effects and a strategy to cope with color metamery. An expert system based on a neural network was found able to analyze endoscopic images to identify suspicious lesions.

Original languageEnglish (US)
Pages (from-to)145-156
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jan 1 2003
EventNovel Optical Instrumentation for Biomedical Applications - Munich, Germany
Duration: Jun 24 2003Jun 25 2003


  • Color metamery
  • Endoscope
  • Expert system
  • Laser scanning
  • MEMS
  • Neural network
  • Silicon micromirror

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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