Fiber optic image guide rods as ultrathin endoscopy

Longin Kociszewski; Dariusz Pysz

doi:10.1117/12.43882

1 July 1991 Fiber optic image guide rods as ultrathin endoscopy

Longin Kociszewski, Dariusz Pysz

Proceedings Volume 1420, Optical Fibers in Medicine VI; (1991) https://doi.org/10.1117/12.43882
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

Flexible image guides are manufactured and applicated in endoscopes for a many years. In technological process formed optical fibres are next glued with the aid of an organic glue. It enables the integration of image guide structure. With this method one can obtain optical fibers of 10-20 pm in diameter what gives a esolution of the image guide in order of 25-50 pairs of lines per mm. It is very di!ficult to obtain the resolution above 50 p1/mm in such a way . It requires a very high speeds of winding drum as well as very high accuracy of its rotation and shift (to obtain a small diameter of the fiber - below 20 pm ). Also there are some difficulties with proper protection and gluing of very thin optical fibers. Half-flexible image guides were developed and applicated in endoscopes in the recent years. They are manufactured with quite different method. Initial material is silica preform with graded index profile. From such a preform in the process of succesive thinning it can be obtained high resolution image guide. Its respectively high flexibility (ray of bending about 0.1 m) is coused by application the silica as an initial material and small diameter of pulled image guide. We decided to employ a similar method, which we call mosaic assembling technology, to manufacture a very thin, rigid image guides rods from multicomponent glasses. Possibility of obtaining very high resolutions (about 100 p1/mm) and very small dimensions (below 1mm) of rigid image guides disposed us to try to applicate this type of image guides inultrathin endoscopes.

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Longin Kociszewski and Dariusz Pysz "Fiber optic image guide rods as ultrathin endoscopy", Proc. SPIE 1420, Optical Fibers in Medicine VI, (1 July 1991); https://doi.org/10.1117/12.43882

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KEYWORDS

Endoscopes

Optical fibers

Glasses

Image resolution

Fiber optics

Manufacturing

Cladding

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