Many non-communication fiber optic applications use single optic fibers bundled together. Two types of fiber optic bundles exist; i.e. coherent and non-coherent fiber bundles. In the non-coherent fiber bundles, the individual fibers are not fused together in any particular order. Such bundles are useful for the transmission of light but not the image.
A coherent fiber bundle is a collection of single fiber optic strands assembled together so that the relative orientation of the individual fibers is maintained through out the length of the bundle. For such a bundle, any pattern of illumination incident at the input end of the bundle reemerges from the output end with the image preserved. Such bundles are called as coherent or imaging fiber bundles. These imaging fiber bundles can be made in a variety of shapes and sizes, but the most common being circular cross-section. Magnification can be achieved by the use of tapered fibers in the bundle. The resolving power, i.e. the image details depends on the
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