The Design And Simulation Of Optical System In Solid-state Lighting

Solid-state lighting has become current of new light sources, and high-brightness, high-power LEDs are in hot demand of light sources. This paper is focusing on sources modeling and optical system design of solid-state lighting. Ray-tracing software is applied to the research of design and simulation of optical systems. Through the simulation, the design process of lighting system can be simplified and the design cycle can be also shortened. This paper is divided into four sections:First of all, solid-state lighting technology and development, principles and key technology of light emitting diodes were briefly introduced, and the significance and application of optical simulation in the optical system were illustrated.Then, basic knowledge of lighting optical system, ray-tracing theory of computer-aided design were discussed in details, and TracePro and LightTools based ray-tracing method and LED modeling was outlined. Three major elements of source modeling were analyzed in depth, including the CAD model of light sources, the light features of light sources, and the spatial distribution of light intensity. On the basis, a LED source with batwing light distribution was modeled using ray-tracing software. In addition, simulation steps and ray-tracing results of LED sources were illustrated.Then, features and technology of optical system of portable LED lighting devices were described in details, and optical system design methods of LED lighting were also summarized. According to the practical requirements, optical system with multiple LED sources could be built. The light intensity distribution of optical system and illuminance evenness of lighting plane were analyzed. On the basis, optical system parameters were optimized, and most satisfactory design program could be concluded for design requirements.Finally, operational principle, characteristics, applications and development of backlight were described. LED backlight model was established in ray-tracing software. Various components for interface definition of optical and geometric modeling were progressed, and backlight systems were ray-traced. Through the simulation results, parameters of backlight system could be adjusted to achieve backlight design requirements.The main innovation of this paper is that ray-tracing software is applied to optical system design of solid-state lighting. The method which realizes various proposed light distribution of LED sources is discussed, design and analysis for optical design of LED lighting is also analyzed. This research provides the direction for the future research in the field of lighting optical systems...