Ghost secondary light source for LED collimated illumination
Ghost secondary light source for LED collimated illumination is a scholarly work, published in 2020 in ''Applied Optics''. The main subjects of the publication include physics, parabolic reflector, light, light beam, light-emitting diode, collimated light, materials science, Light tube, point source, optics, time-of-flight camera, collimator, focal length, beam, reflector, and surface roughness. A spotlight consisting of the curved light guide and a parabolic reflector is fabricated and shows that a collimated beam with a half-intensity angle of less than 4.3 deg can be realized with the reflector opening diameter of 90.0 mm..