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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, Sungjo Park, Jongki Kim, Sungrae Lee, Mansik Jeon, Jeehyun Kim, and 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);

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