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<p>In order to improve collimating performance, we proposed a new structure of side-collimating optics. Optical surfaces are calculated based on purely geometrical optics. Theoretical model was based on point source, but all simulations were performed with a LED chip size of 1&#xa0;mm × 1&#xa0;mm. The light emitted from the LED is collimated perpendicular to the optical axis of LED after refracting and total internal reflecting by the optics. Since the light is collimated laterally by the optics, we have considered collimating performance in conjunction with a reflector. Effects of initial conditions on the size and collimating performance of the optics were analyzed. Simulation results show that the light flux percentage is achieved 95.23% under a half view angle of ± 2° for a LED chip. Most illuminating area (possessing 80% flux) radii are no more than 3&#xa0;m when the target plane is 100&#xa0;m away from LED. These simulation results manifest that the optics has good collimating performance and its new structure is a valuable.</p>

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New structure of side-collimating optics for LED with high collimating performance based on geometrical optics

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • Ji Song Ho,
  • Byong Sol Ri,
  • Hyon Chol Kim

摘要

In order to improve collimating performance, we proposed a new structure of side-collimating optics. Optical surfaces are calculated based on purely geometrical optics. Theoretical model was based on point source, but all simulations were performed with a LED chip size of 1 mm × 1 mm. The light emitted from the LED is collimated perpendicular to the optical axis of LED after refracting and total internal reflecting by the optics. Since the light is collimated laterally by the optics, we have considered collimating performance in conjunction with a reflector. Effects of initial conditions on the size and collimating performance of the optics were analyzed. Simulation results show that the light flux percentage is achieved 95.23% under a half view angle of ± 2° for a LED chip. Most illuminating area (possessing 80% flux) radii are no more than 3 m when the target plane is 100 m away from LED. These simulation results manifest that the optics has good collimating performance and its new structure is a valuable.