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14 May 2010 Design and measurement of TIR lens of MR16-compatible LED lamp without aspherical surface for high directivity
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In recently, many illuminance applications use LEDs to replace the traditional light source because they have many advantages, such as longer life time, lower power consumption, smaller size, and safer. Because the optical characteristics of LEDs and traditional sources are different, we need to do secondary optical design for LED applications, such as headlamp, street lamp, and MR16 lamp. For the better optical characteristic, the optical elements of the applications often include aspherical surface. However, it would generate higher cost and lower yield. In this paper, we design a TIR lens for MR16-Compatible LED Lamp without any aspherical surface. Base on the purpose of MR16, the design conditions are high directivity for higher illumination and flat top surface to simulate the traditional MR16. In this design, the TIR surface controls the edge intensity of LED and the central curve surface controls the center intensity of LED. According to the optical simulation, the view angle of the MR16-Compatible LED Lamp is ±9.3° and the central illumination is 559 Lux in which the total flux of LED is 83 lm. Finally, we manufacture and measurement the designed TIR lens. The view angle of the manufactured MR16 is about ±7.0° and the central illumination is 581 Lux in which the total flux is 52 lm.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wei-Che Hsieh, Yi-Yung Chen, Yu-Chi Lee, and Allen Jong-Woei Whang "Design and measurement of TIR lens of MR16-compatible LED lamp without aspherical surface for high directivity", Proc. SPIE 7717, Optical Modelling and Design, 771714 (14 May 2010);


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