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31 May 2017 Volume holographic imaging endoscopic design and construction techniques
Isela D. Howlett, Wanglei Han, Michael Gordon, Photini Rice, Jennifer K. Barton, Raymond K. Kostuk
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Journal of Biomedical Optics, Vol. 22, Issue 5, 056010 (May 2017). https://doi.org/10.1117/1.JBO.22.5.056010
Abstract
A reflectance volume holographic imaging (VHI) endoscope has been designed for simultaneous in vivo imaging of surface and subsurface tissue structures. Prior utilization of VHI systems has been limited to ex vivo tissue imaging. The VHI system presented in this work is designed for laparoscopic use. It consists of a probe section that relays light from the tissue sample to a handheld unit that contains the VHI microscope. The probe section is constructed from gradient index (GRIN) lenses that form a 1:1 relay for image collection. The probe has an outer diameter of 3.8 mm and is capable of achieving 228.1  lp/mm resolution with 660-nm Kohler illumination. The handheld optical section operates with a magnification of 13.9 and a field of view of 390  μm×244  μm. System performance is assessed through imaging of 1951 USAF resolution targets and soft tissue samples. The system has also passed sterilization procedures required for surgical use and has been used in two laparoscopic surgical procedures.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE) 1083-3668/2017/$25.00 © 2017 SPIE
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Isela D. Howlett, Wanglei Han, Michael Gordon, Photini Rice, Jennifer K. Barton, and Raymond K. Kostuk "Volume holographic imaging endoscopic design and construction techniques," Journal of Biomedical Optics 22(5), 056010 (31 May 2017). https://doi.org/10.1117/1.JBO.22.5.056010
Received: 18 January 2017; Accepted: 11 May 2017; Published: 31 May 2017
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KEYWORDS
Holography
Imaging systems
Optical design
Endoscopy
Tissues
GRIN lenses
Laparoscopy
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