Functional concept for the source independent beam-shaping of LED light

Abstract

The development of LEDs is growing very fast, frequently producing highly efficient and powerful light sources. This encourages optical designers to frequently change the design of secondary optical systems to be suited for newly developed light sources. One of the most critical differences between the current developed LEDs is their luminous intensity distribution, which is used as an input light source model in design procedures of secondary optical systems. Therefore, using a functional concept for the light source independent beam-shaping of LEDs is the main objective of this work. This functional concept can be considered to design secondary optical systems to generate the required luminous intensity distribution independently from the input light source intensity distribution. This leads to more freedom using the developed LEDs without changing secondary optical systems. In this paper, state of the art functional concepts have been discussed. The optical functional evaluation is performed by simulating a secondary refractive lens-array. Simulation results show the degree of the independency relation between the light source intensity distribution and the created luminous intensity distributions.