Today I introduce a article about designing of bicycle light. The design is followed a guide line of German regulation StVZO.

Authors use inward grooves facing Fresnel lens and reflector.

The link is below.

<The illustration of Germany StVZO regulations>

Simulation below demonstrates the simulation result of the optimum design. The simulated illuminance distribution is similar as an extended rectangle and in compliance with the requirements of Germany StVZO regulations.

<Simulated illuminance distribution of the proposed direct projection bicycle light – original link>