![]() However, due to their large light-emitting surface size, reflector design may limit their field of application. 3.Īs a new type of lighting source, the electrodeless lamp has advantages such as long lifespan, high efficiency, high color rendering index, etc. ![]() A feedback modification method for extended LED source was proved effective and efficient in Ref. Generally, iterative methods are adopted to modify the initial reflector generated for a point source to achieve acceptable performance. On the other hand, design of free-form reflector for a surface source is more challenging. Nevertheless, in most practical cases, we can adopt a variable separation mapping method to get numerical and approximate solutions. Here, the reflector design for a point source can be considered as solving a set of nonlinear partial differential equations, and unfortunately, no analytical solution is available. ![]() 1 Otherwise, it becomes a more complicated 3-D problem. When the source and the desired target illuminance or intensity distribution have the same symmetry profile (rotational or translational), the problem degenerates to 2-D wherein only one curve is to be designed, and cases for both point and extended sources have already been solved analytically. In lighting systems, reflector design is aiming at reshaping light emitted from the source to achieve a given illuminance or intensity distribution at the target plane.
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