Fiber-optic imaging systems such as the medical endoscope, the boroscope, the fused-image faceplate, and the image conduit are now made from glass step-index (SI) fibers, and the image resolution of the SI fiber-optic imaging systems is limited to ~5 µm. Ultrahigh-resolution fiber-optic fused-image plates with fiber diameter sizes of 5 and 2.8 µm were fabricated with plastic graded-index (GRIN) fibers. The measured image resolutions of the 5-µm SI and GRIN-based guides were comparable, and the resolution of the plastic GRIN image guides improved as the fiber diameter was reduced from 5 to 2.8 µm.
© 2000 Optical Society of America
(100.6640) Image processing : Superresolution
(110.2350) Imaging systems : Fiber optics imaging
(160.2290) Materials : Fiber materials
(170.0110) Medical optics and biotechnology : Imaging systems
Bongsoo Lee, Won Y. Choi, and James K. Walker, "Ultrahigh-resolution plastic graded-index fused image plates," Opt. Lett. 25, 719-721 (2000)