Design and Realization of Fiber End Lamp Based on Fiber Optic Lighting Technology

To apply fiber bundle end illumination to a uniformly illuminated scene, a fiber end lamp based on fiber optic lighting technology is designed, and a principle model lamp is presented. Based on the light-guiding characteristics of the fiber, a coupling device between an LED and fiber bundle is designed. Through an error analysis, the best-fitting order of the algebraic polynomial fitting distribution curve is taken as 10, and the optical lens of the fiber bundle end is designed by the clipping method. The fiber bundle and lens arc then assembled into a lamp. The simulations show that the vertical uniformity of illumination of a map placed on a receiving plane 300 mm away is 90.99%, the horizontal uniformity of illumination is 89.59%, and the coupling efficiency of the device is 87%. Finally, the error analysis shows that the best coupling distance of the system is 2 mm, the distance between the lens and light-emitting end face is 50 mm, and the uniformity of illumination of the lamp is 81. 54%. The theoretical and experimental results show that the optical lens significantly improves the divergence characteristics and uniformity of the fiber end beam. The design method for the fiber end lamp provides a practicable solution for the application of fiber end illumination in uniform illumination design.