Phototherapy device for use in dermatology field, has quarter wave-plate that filters light at output of polarizer to obtain clockwise or anticlockwise polarized light and iris provided at output of plate

摘要

The device has an optical waveguide (40) for allowing the light to pass through an input of a stylet (50) for projecting a light beam on living tissues. A quarter wave-plate (571) filters the light at an output of a polarizer (572) to obtain clockwise or anticlockwise polarized light. An iris (53) is provided at an output of the plate and is rotated by a bolt.