3차원 자유곡면식을 이용한 LED 비대칭 렌즈 설계 및 성능 비교 분석

다국어 초록 (Multilingual Abstract)

The exit surface of a lens is designed using a three-dimensional free-form expression in order to easily modify a curved surface. This enables the design of numerical values and mathematical things using three-dimensional free-form expression, and enhances precision because it can be fine-tuned via numerical control. The standard of “Classification of Luminaire Light Distribution” for outdoor lighting fixtures by IESNA is adopted in order to examine the correlation between three-dimensional free-form surface expression and lighting performance. The variation of light distribution type and range is analyzed using the values of maximum light intensity and 50% light intensity. The actual tolerance occurs owing to parameters such as the thickness of the lens, the distance between LEDs, and the movement of the center of the incident surface; the effects of changes in these parameters on the performance are compared and analyzed.

참고문헌 (Reference)

1 사종엽, "자동차 헤드램프 반사경의 광학 설계" 한국자동차공학회 12 (12): 190-196, 2004

2 이민욱, "빛공해 방지를 위한 조명기구 특성 분류와 설치 방안" 강원대학교 대학원 2014

3 Illuminating Engineering Society of North America, "The IES Lighting Handbook Reference and Application" Illuminating Engineering Society of North America 2011

4 Yang, J. S., "Study on Design Method of a LED Lens with a Single or Multiple Freeform Surfaces for Improving its Luminous Flux" Inha University 2017

5 Bardsley Consulting, "Solid-State Lighting R&D Plan" DOE SSL Program, Inc. 2015

6 Shei, S. C, "Optical Design of a Freeform Lens based on Multi-Chip-On-Single-Board LED Light Source for 140W Street Lamp" 1 (1): 31-33, 2011

7 Wang, K, "New Reversing Design Method for LED Uniform Illumination" 19 (19): 830-840, 2011

8 IES, "Luminaire Classification System for Outdoor Luminaires" IESNA 2014

9 Hyun, D. H, "LED Light Diffusing Lens Using Numerical Formula of Asymetric Free Curved Surface"

10 Malacara, D, "Handbook of Optical Design" Marcel Dekker, Inc. 2004

11 Zheng, Z, R, "Freeform Surface Lens for LED Uniform Illumination" 48 (48): 6627-6634, 2009

12 Chen, J, J, "Freeform Lens Design for LED Collimating Illumination" 20 (20): 10984-10995, 2012

13 Ding, Y, "Freeform LED Lens for Uniform Illumination" 16 (16): 12958-12966, 2008

14 Kasahara, T, "Discomfort Glare Caused by White LED Light Sources" 30 (30): 95-103, 2006

15 Hu, R, "Design of a Novel Freeform Lens for LED Uniform Illumination and Conformal Phosphor Coating" 20 (20): 13727-13737, 2012

16 Moiseev, M. A, "Design of High-Efficient Freeform LED Lens for Illumination of Elongated Rectangular Regions" 19 (19): 225-223, 2011

17 Wang, K, "Design of Compact Freeform Lens for Application Specific Light-Emitting Diode Packaging" 18 (18): 413-425, 2010

18 Situ, W, "Combined Feedback Method for Designing a Free-Form Optical System with Complicated Illumination Patterns for an Extended LED Source" 19 (19): 1022-1030, 2011

19 장성환, "COB형 LED 보안등을 위한 렌즈 구조 설계" 한국조명.전기설비학회 27 (27): 1-8, 2013