Laser beam intensity measurement device in which beam intensity is measured by the fluorescence caused in a fluorescing gas and application of the calibration measurements to ophthalmic laser surgery

摘要

Method for measuring the beam intensity of a laser beam has the following steps: input of the fluorescence radiation intensity from a fluorescing gas, the intensity of which is measured when the laser beam is incident on the gas and excites the fluorescence. A cutting range has a value corresponding to that suitable for cutting of an object and the radiation intensity distribution within the cutting range is determined from the intensity of the fluorescence radiation. Independent claims are also included for the following:- (a) a device for measuring the fluorescence intensity of a laser beam with means for measuring the fluorescence generated by a fluorescing gas when it is excited with laser radiation of energy corresponding to that required for tissue cutting; (b) and a device emission of a laser beam with control means, an optical fluorescence measurement device and calibration means.