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http://dx.doi.org/10.3807/HKH.2008.19.2.087

Design of an Endoscopic Microscope Objective Lens Composed of Flexible Fiber Bundle and Gradient-index with a High Resolution and a Minimally-Invasive Outer Diameter  

Jang, Sun-Young (Department of Applied Optics and Electromagnetics, College of Natural Science, Hannam University)
Rim, Cheon-Seog (Department of Applied Optics and Electromagnetics, College of Natural Science, Hannam University)
Publication Information
Korean Journal of Optics and Photonics / v.19, no.2, 2008 , pp. 87-94 More about this Journal
Abstract
We present a new design for an endoscope objective lens composed of a lexible fiber bundle with 30,000 core, and a gradient-index (GRIN) objective lens with an optical adaptor. The characteristic of this objective lens is to be minimally-invasive to be able to insert easily in the internal organs of live animals. The GRIN lens has a small diameter and a very simple construction, which is selected with the diameter of 1.0 mm and numerical aperture of 0.5 to achieve a minimally-invasive outer diameter and a high resolution. The resultant designed lens shows the performance as follows; a lateral resolution of 1.63 um and diameters of 100% encircled energy of $0.3\;{\mu}m$ and $0.83\;{\mu}m$ for the on-axis and the off-axis image point, respectively. Also, we can present a cheap solution with a lateral resolution of 1.74 um and diameters of 100% encircled energy of $1.10\;{\mu}m$ and $2.84\;{\mu}m$ for the on-axis and the off-axis image point, respectively.
Keywords
Fiber optics; Biology; confocal microscopy; Aberration compensation; Gradient-index lenses;
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Times Cited By KSCI : 2  (Citation Analysis)
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