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US 5,479,550 AGranted
Image fiber
AssigneeOlympus Optical Co., Ltd.
InventorsKimihiko Nishioka, Katsuya Ono, Masaru Shiraiwa
Life of this patent
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Abstract
An image fiber has a plurality of optical fibers with normalized frequencies different from one another, which is constructed so that a plurality of cores different in size and shape from one another are distributed at random in a cladding. The optical fibers include at least two kinds of optical fibers having propagation modes different in number. Thus, the image fiber is capable of suppressing cross talk to prevent the degradation of image quality.
Claims20
An image fiber comprising:
- a plurality of optical fibers each having a V-value defined by an equation:
- ##EQU12## where k=2.pi./.lambda., .lambda. is a wavelength of light propagatable through a respective one of said plurality of optical fibers, a is a radius of a core of said respective one of said plurality of optical fibers, n.sub.1 is a refractive index of said core of said respective one of said plurality of optical fibers, and n.sub.2 is a refractive index of a cladding corresponding to said respective one of said plurality of optical fibers;
- said plurality of optical fibers including plural optical fibers having a first V-value and plural optical fibers having a second V-value different from said first V-value;
- said plurality of optical fibers including plural optical fibers having a first number of propagation modes of light propagatable therethrough and plural optical fibers having a second number of propagation modes of light propagatable therethrough, said second number of propagation modes being different from said first number of propagation modes.
1 more element
Dependencies are inferred from the claim text.