[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.3807/KJOP.2004.15.6.511

Performance evaluation by simulation for the angular luminous intensity distributions of marine lanterns using a tilting aspherical Fresnel lens and a C-8 type light bulb

Cho Hyun Seok (Applied Optics and Electromagnetics, School of Natural Sciences, Hannam University)
Jo Jae Heung (Applied Optics and Electromagnetics, School of Natural Sciences, Hannam University)
Park Seungl Nam (Photometry and Radiometry Group, Korea Research Institute of Standards and Science)
Park Chul Woung (Photometry and Radiometry Group, Korea Research Institute of Standards and Science)
Kim Yong Wan (Photometry and Radiometry Group, Korea Research Institute of Standards and Science)
Kim Jong Tae (Division of Imaging Science and Technology, Pukyung University)

Publication Information

Korean Journal of Optics and Photonics / v.15, no.6, 2004 , pp. 511-518 More about this Journal

Abstract

Providing marine signal lanterns with advantages of little weight as well as large aperture, a Fresnel lens has been adopted to transfer the beam from the lanterns up to 10 nautical miles (18.53 km). A Fresnel lens with the diameter of 250 mm and 300 mm was designed by a lens design program and optimized by adjusting the groove parameters of the lens. The angular luminous intensity distribution (ALID) of this lens was calculated by using an illumination analysis program considering the ALID of a light bulb. At the best alignment of the bulb, the maximum luminous intensities (MLI) of the lantern were 1000 cd (in the case of 250 mm diameter) and 1300 cd (in the case of 300 mm diameter). These are more than the critical value of 720 cd that is the Korean Standard of MLI for the marine lantern. The ALID was investigated as a function of misalignment from the lens focus to determine the tolerance of the alignment ranges.

Keywords

LightTools; Beacons; Fresnel lens; Lantern;

Citations & Related Records

Reference

1	IALA, 'Recommendation for the notation of luminous intensity and range of light', 1967
2	박승남, '표준화 등명기 연구개발 최종 보고서', (한국 표준과학연구원, 대전, KRlSS-2003-062) 2003
3	Fresnel techno10gies inc, 'Fresnel lenses', www.fresneltech.com
4	김병렬, 박상형, '검사기판 조명장치', 한국특허 10-0400455, 2003
5	김병일, '전자칠판용 스크린', 한국특허 20-0247382, 2001
6	김종운, 장세희, '프레넬 렌즈를 이용한 자동차용 조명 등', 한국특허 1997-0006280, 1997
7	Warren J. Smith', Modern Optical Engineering: third edition (McGraw Hill, Seoul, 2000), pp 312-317
8	Seung Nam Park, Chul Woung Park, Yong Wan Kim, Hyun Seok Cho, Jae HeungJo, and Jong Tae Kim, 'Optical design and illumination simulation of Fresnel lenses for marine signal lanterns', to be submitted in proceedings of SPIE (photonics Asia 2004, Peijing, Nov. 8-11 2004) DOI
9	Optical Research Associates, 'LightTools ver 4.0 Illumination Module User's Guide', 2003