Optical design of an in vivo laparoscopic lighting system

Xiaolong Liu, Reza Yazdanpanah Abdolmalaki, Gregory Mancini, Jindong Tan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper proposes an in vivo laparoscopic lighting system design to address the illumination issues, namely poor lighting uniformity and low optical efficiency, existing in the state-of-the-art in vivo laparoscopic cameras. The transformable design of the laparoscopic lighting system is capable of carrying purposefully designed freeform optical lenses for achieving lighting performance with high illuminance uniformity and high optical efficiency in a desired target region. To design freeform optical lenses for extended light sources such as LEDs with Lambertian light intensity distributions, we present an effective and complete freeform optical design method. The procedures include (1) ray map computation by numerically solving a standard Monge-Ampere equation; (2) initial freeform optical surface construction by using Snell's law and a lens volume restriction; (3) correction of surface normal vectors due to accumulated errors from the initially constructed surfaces; and (4) feedback modification of the solution to deal with degraded illuminance uniformity caused by the extended sizes of the LEDs. We employed an optical design software package to evaluate the performance of our laparoscopic lighting system design. The simulation results show that our design achieves greater than 95% illuminance uniformity and greater than 89% optical efficiency (considering Fresnel losses) for illuminating the target surgical region.

Original languageEnglish (US)
Article number125003
JournalJournal of Biomedical Optics
Volume22
Issue number12
DOIs
StatePublished - Dec 1 2017

Fingerprint

Optical design
illuminating
Lighting
illuminance
Lenses
lenses
systems engineering
Light emitting diodes
Monge-Ampere equation
light emitting diodes
Systems analysis
Software packages
luminous intensity
Light sources
constrictions
rays
light sources
Cameras
illumination
cameras

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering

Cite this

Optical design of an in vivo laparoscopic lighting system. / Liu, Xiaolong; Abdolmalaki, Reza Yazdanpanah; Mancini, Gregory; Tan, Jindong.

In: Journal of Biomedical Optics, Vol. 22, No. 12, 125003, 01.12.2017.

Research output: Contribution to journalArticle

Liu, Xiaolong ; Abdolmalaki, Reza Yazdanpanah ; Mancini, Gregory ; Tan, Jindong. / Optical design of an in vivo laparoscopic lighting system. In: Journal of Biomedical Optics. 2017 ; Vol. 22, No. 12.
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