Focus-free optical-resolution photoacoustic microscopy using an all-fiber Bessel beam generator

Chulhong Kim, Sungjo Park, Jongki Kim, Sungrae Lee, Mansik Jeon, Jeehyun Kim, Kyunghwan Oh

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Optical-resolution photoacoustic microscopy (OR-PAM) becomes a premier microscopic imaging tool in biomedicine because it provides agent-free optical absorption information in tissues. By tightly focusing light to a spot, the fine lateral resolution can be achieved in OR-PAM. The focal spot size is typically determined by the numerical aperture of the used objective lens. Here, we demonstrate focus-free OR-PAM using a Bessel beam generator. In this approach, no objective lens is required. We have photoacoustically imaged a carbon fiber with a diameter of ∼6 μm, and the measured lateral resolution was ∼6-7 μm. Beneficially, the complexities of the existing OR-PAM systems can be greatly relieved.

Original languageEnglish
Title of host publicationPhotons Plus Ultrasound
Subtitle of host publicationImaging and Sensing 2013
Publication statusPublished - 2013
EventPhotons Plus Ultrasound: Imaging and Sensing 2013 - San Francisco, CA, United States
Duration: 2013 Feb 32013 Feb 5

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


OtherPhotons Plus Ultrasound: Imaging and Sensing 2013
Country/TerritoryUnited States
CitySan Francisco, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging
  • Biomaterials


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