Fiber Optics :: essays research papers

Fiber OpticsAssignmentMany modern medical materials and equipment work on a ruler which isbeyond the capacity of human transducers.Comment and discuss the working principles of an endoscope, uteroscopeor a rectoscope showing the illuminating path, the image path, transmission pathand the liquid beam or operating instrument ducts, showing the position ofsuitable valves.This will therefore explain how light travels done an optical fibreand show how much(prenominal) fibres are used in medicinal equipment either to transmitlight or to bring back images from within a patient.ContentsFibre Optics fibreoptic BundlesCoherent and Incoherent BundlesTransimission efficiency and resolutionTypes of Fibres Single mode or Multimode ?Fibre PropertiesFibre-Optic EndoscopyIntroductionThe Fibre-Optic EndoscopeSome Applications for Fibre-Optic EndoscopyReferencesFibre OpticsA relatively new technology with vast potential importance, fibre optics, is thechannelled transmission of light through hair- thin applesauce fibres.The clear advantages of fibre optics are too oftentimes obscured by concerns thatmay have been valid during the pioneering days of fibre, but that have sincebeen answered by technical advances.Fibre is fragileAn optical fibre has greater flexible strength than copper or steel fibres of thesame diameter. It is flexible, bends easily, and resists most corrosiveelements that attack copper credit line. Optical cables can withstand pulling forcesof to a greater extent than 150 pounds.Fibre is hard to work withThis myth derives from the early days of fibre optic connectors. Earlyconnectors where difficult to apply they came with many small move that couldtax even the nimble fingered. They needed epoxy, curing, cleaving and polishing.On top of that, the technologies of epoxy, curing, cleaving and polishing werestill evolving.Today, connectors have fewer parts, the procedures for termination are wellunderstood, and the craftsperson is aided by polishing machines and curing ovensto make the job faster and easier.Even better, epoxyless connectors eliminate the need for the messy and time-consuming application of epoxy. Polishing is an increasingly simple,straightforward process. Pre-terminated cable assemblies also speedinstallation and reduce a once (but no longer) labour-intensive process.Fibre Optic BundlesIf light enters the end of a solid glass rod so that the light transmitted intothe rod strikes the side of the rod at an angle O, exceeding the critical angle,then total internal coefficient of reflection occurs. The light continues to be internallyreflected back and forth in its passage along the rod, and it emerges from theother end with very little loss of intensity.This is the principle in fibre optics of which long glass fibres of very smallcross-sectional area transmit light from end to end, even when bent, withoutmuch loss of light through their side walls.