Apparatus for delivering a laser beam

摘要: A beam delivery apparatus, including a set of focusing mirrors (or transmissive lenses) mounted along an endoscope channel. laser can be focused into input end the channel with smaller F number (wider cone angle) than is possible in conventional endoscope. As propagates down channel, it reflected transmitted) finite times by elements. The elements act as periscope to focus and refocus little loss power. invention enables channel's distal achieved using In preferred embodiment, pair reflecting strips are surface each strip defines six mirrors, undergoes total twelve reflections from Preferably, mirror has curvature selected prevent introduction astigmatic distortion during reflection.