Two-wavelength holographic micro-endoscopy

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Alexander Gröger - , Universität Stuttgart (Autor:in)
  • Robert Kuschmierz - , Professur für Mess- und Sensorsystemtechnik (Autor:in)
  • Alexander Birk - , Universität Stuttgart (Autor:in)
  • Giancarlo Pedrini - , Universität Stuttgart (Autor:in)
  • Stephan Reichelt - , Universität Stuttgart (Autor:in)

Abstract

In this paper, we present a method for micro-endoscopic topography measurement utilizing two-wavelength holography. Initially, we evaluate the inter-core dispersion and cross-talk of two commercially available imaging fiber bundles (CFBs) and introduce the concept of virtual surface roughness as a limiting factor of achievable measurement resolution. Subsequently, we describe a micro-endoscope setup incorporating 3D-printed micro-optics, resulting in a total diameter of less than 450 µm. We evaluate the measurement accuracy using a pyramid-shaped test object and demonstrate that a relative measurement error of 7.5% can be achieved with a simple phase unwrapping approach. Moreover, we demonstrate how leveraging a deep learning approach from existing literature, tailored for heavily noisy phase maps, effectively reduces the relative measurement error. The standard deviation of the measurement error is 4.2 times lower with the deep learning approach.

Details

OriginalspracheEnglisch
Seiten (von - bis)23687-23701
Seitenumfang15
FachzeitschriftOptics express
Jahrgang32
Ausgabenummer13
PublikationsstatusVeröffentlicht - 17 Juni 2024
Peer-Review-StatusJa

Externe IDs

PubMed 39538825

Schlagworte