• Proceedings of the Optical Society of Korea Conference
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• 2009.02a
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• pp.323-324
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• 2009

• Proceedings of the Optical Society of Korea Conference
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• 2009.02a
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• pp.179-180
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• 2009

• Korean Journal of Optics and Photonics
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• v.28 no.5
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• pp.194-202
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• 2017

The purpose of this study is to analyze how optics concepts and activities have changed according to the revision of the national science curriculum. For this purpose, the optics achievement standards presented in the middle-school science curriculum of the 7th curriculum, 2007 revised curriculum, 2009 revised curriculum, and 2015 revised curriculum, and the optics content presented in the textbooks developed for each curriculum, were compared and analyzed. The optics content is classified into four concepts: the process of viewing an object; light and color; reflection and refraction; and the image from a mirror and a lens. The main results are as follows: First, according to the revision of curriculum, some optics concepts have been added or removed. In particular, big changes have appeared in the concepts of "process of viewing the object", "dispersion", "reflection and refraction" and so on. Second, the content for 'image formation by a mirror and a lens' was gradually reduced, according to the revision of curriculum, and the level of activity was also adjusted. Third, attempts to present the content of textbooks in conjunction with the phenomena and tools that students can experience in everyday life have increased gradually. In addition, based on the analysis of the content of curriculum and textbooks, the implications for optics education have been discussed.

• Korean Journal of Optics and Photonics
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• v.24 no.4
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• pp.189-195
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• 2013

An F/1.2 infrared optical system that involves two aspheric BD-2 lenses and an aspheric diffractive surface was designed over $8-14{\mu}m$ with a field angle of $15.2^{\circ}$. The system may be used in uncooled cameras and is analyzed using beam synthesis propagation (BSP). The diffractive surface is modeled as a physical surface with a given thickness, and results are compared with those obtained by conventional methods, such as the exit-pupil method and a method which superposes diffraction orders.

• The Optical Journal
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• s.146
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• pp.47-50
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• 2013

'요코하마 광학 및 포토닉스 박람회(OPTICS & PHOTONICS International Exhibition 2013)'가 지난 4월 24부터 26일까지 3일간 일본 퍼시픽 요코하마 전시장 C, D홀에서 개최됐다. 올해 OPIE에는 다양한 산업 및 학술 분야의 연구와 생산 현장에서 응용 가능한 광 관련 제품이 대거 출품됐으며, 레이저학회 산업상을 수상한 제품들도 소개됐다. 이 원고는 월간 OPTRONICS 2013년 6월호에 실린 내용으로 그린광학의 유정훈 팀장이 번역에 도움을 주었다.

• Korean Journal of Optics and Photonics
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• v.7 no.4
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• pp.333-340
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• 1996

We have implemented a planar integrated optics for the fractional Fourier transform (FRT) which has recently been developed as a generalized form of the conventional Fourier transform. FRT optical systems provide versatile tools for analyzing signals and designing hardwares, but require high accuracy and stability in the arrangement of optical components because of their shift-variant characteristic. The planar optical FRT setup composed of free-space optical components integrated on a single glass block makes the FRT of 2-dimensional(2-D) input patterns through the 3-D glass-space. Therefore, taking advantage of the compactness, easy alignment and thermal/mechanical stability, the planar optics can provide a useful approach to realizing an optical fractional correlation system in a practical way. In the experiment, we have obtained accurate FRT results by using the planar integrated optics with 4 different fractional orders of 0.25, 0.5, 0.75, and 1.0.

• Proceedings of the Optical Society of Korea Conference
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• 2005.02a
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• pp.116-116
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• 2005

• Proceedings of the Optical Society of Korea Conference
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• 2007.02a
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• pp.191-192
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• 2007

• Proceedings of the Optical Society of Korea Conference
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• 2007.07a
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• pp.215-216
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• 2007

• Korean Journal of Optics and Photonics
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• v.17 no.2
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• pp.165-174
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• 2006

The autotstigmatic null lens system is designed and constructed for the fabrication of a parabolic mirror with the diameter of 450 mm(f/2.7). And the measurement reliability is also analyzed theoretically by means of the tolerancing technique using lens design software(CODE V). From this analysis, we can precisely fabricate a parabolic mirror with the large diameter of 450 mm(f/2.7). Meanwhile, in order to confirm the fabrication results by the autostigmatic method, the mirror surface is tested again by an autocollimating method that uses only a plane mirror without any null lens.