Saturday, February 9, 2019
Laser Surgery :: Health Medicine Medical Essays
Laser mathematical process Lasers (The word laser is an acronym for light amplification by stimulated emanation of beam.) lasers were runner introduced in 1960, The first successfully optical laser constructed by Maiman (1960), was a ruby crystal surrounded by a helicoilal fleet tube enclosed within a polished aluminum rounded cavum cooled by forced air. The ruby cylinder forms a Fabry-Perot cavity by optically polishing the ends to be parallel to within a third of a wavelength of light. Each end was coated with evaporated silver hotshot end was make less reflective to allow some radiation to escape as a beam was produced. Initially the laser was named the intent looking for a job. Photo-pumped by a fast discharge flash-lamp, the first ruby lasers operated in pulsed mode for reasons of heat dissipation and the need for luxuriously pumping powers. Nelson and Boyle (1962) constructed a continuous lasing ruby by replacing the flash lamp with an arch lamp.(1) Today lasers are much like those of the early ones and they are wide used in many fields, their uses are wide spread, From fusion natural philosophy to the DVD player these are common places where lasers are used. Medicine and operating theater are no exceptions from skin resurfacing to eye surgery to correct vision. With the increase of lasers Physicians have been able to provide treatment for a large fig of medical disorders. Medical lasers have made it possible to treat conditions, which were antecedently untreatable or difficult to treat. To make the most of the laser technology physicians mustiness maintain a up to date understanding of laser systems and conditions for which each can be applied .To achieve these goals the basic terminology and bedrock of laser-tissue interaction is needed.Before we can learn about lasers we need to recognise a little about light, because that is essentially what a laser is made of. First the speed of light is 3.00*10to the 8th meter per second .The A merican physicist Albert Michelson found a ratio 1.33 for the speed of light c in a vacuum to the lights speed v in water. This value is compeer to the index of refraction n thus n=c/v gives us a way to predict the speed of light in any material once we know its index refraction.(2) Lasers produce a intense beam of bright light that travels in one direction. And a laser has the unique ability to produce one specific wring or wave length of light which can be change in its intensity and pulse.