4 March 2013 Focus-free optical-resolution photoacoustic microscopy using an all-fiber Bessel beam generator
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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.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chulhong Kim, Chulhong Kim, Sungjo Park, Sungjo Park, Jongki Kim, Jongki Kim, Sungrae Lee, Sungrae Lee, Mansik Jeon, Mansik Jeon, Jeehyun Kim, Jeehyun Kim, Kyunghwan Oh, Kyunghwan Oh, } "Focus-free optical-resolution photoacoustic microscopy using an all-fiber Bessel beam generator", Proc. SPIE 8581, Photons Plus Ultrasound: Imaging and Sensing 2013, 85812F (4 March 2013); doi: 10.1117/12.2003303; https://doi.org/10.1117/12.2003303


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