Abstract
Glass-on-glass fiber bundles have been made with a resolution of better than 20 optical lines per millimeter in a 36-in. length. Transmittance is 47% in the range 5600°–7000°. Bundles . in diameter have been incorporated in a duodenoscope, permitting the examination of the duodenum. A ureterscope has also been constructed in diameter and 30 in. long for the examination of the ureter and kidney.
© 1961 Optical Society of America
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