광 Pickup 용 Gradient-Index 대물렌즈 설계

박인규,이종웅,Park, In-Kyu,Lee, Jong-Ung 한국광학회 2007 한국광학회지 Vol.18 No.4

SELFOC 소재를 사용하여 높은 수치구경을 가지는 광픽업용 대물렌즈를 설계하였다. SELFOC 소재는 radial gradient-index 분포를 가지며, 이것은 설계에 추가적인 자유도를 제공하므로, 비구면이 아닌 구면만으로 높은 수치구경의 대물렌즈의 설계가 가능하다. 이 연구에서는 quadratic constant와 광축의 굴절률, 광축 두께, 입사동 직경을 변화시키며 rms 스폿 직경 변화를 조사하였으며, Code V를 사용하여 대물렌즈의 최적화와 결상특성을 평가하였다. 이 분석에서는 quadratic constant와 광축의 굴절률이 클수록, 렌즈가 두꺼워질수록, 입사동 직경은 작을수록 더 좋은 특성을 보임을 알 수 있었다. 이 결과를 바탕으로 2매의 구면 SELFOC 렌즈로 구성된 높은 NA의 DVR용 대물렌즈를 설계하였으며, 2가지 형태의 해 Solution I, II가 존재하였다 Solution I은 두 매 모두 양의 굴절능을 가지며 compact한 광학계를 구성하지만, 비축 수차 보정이 Solution II에 비해 부족하였다. Solution II는 음-양의 굴절능으로 조합된 광학계로 비축 수차가 비교적 잘 보정되었지만, 광학계의 전장길이가 길고 렌즈의 직경이 커지는 문제점이 있었다. High NA objective design by using SELFOC materials was studied, and two kinds of objective for optical pick-up were designed. The SELFOC materials have radial gradient index distribution, and it gives additional degree of freedom in optical design. Therefore, we expect that optical design of high NA objective without aspheric surface will be possible. In this study, the variation of ms spot diameter was investigated as a function of quadratic constant and refractive index on axis for various combinations of axial thickness and entrance pupil diameter. For the survey, Code V was used for optimization and evaluation of the objective lenses. The result suggested that larger quadratic constant and higher refractive index on axis could give us better imaging performance for all combinations of axial thickness and pupil diameter. Based on the survey, we designed high NA objectives for DVR. There were two kinds of design solution consisting two spherical SELFOC lenses. The solution I had positive-positive lens configuration with short over-all-length, but it had poor off-axial performance compared with the solution II. The solution II had negative-positive lens configuration with good off-axial imaging performance. But the solution II had some disadvantages, long over-all-length and large diameter of the second lens.

A Harmonic Parallelism Account of English Spirantization

박인규 한국중앙영어영문학회 2019 영어영문학연구 Vol.61 No.3

This paper accounts for English spirantization without using any intermediate stages between the input and output within the framework of harmonic parallelism. We have reviewed the previous analyses of English spirantization, especially a harmonic serialism analysis. We have found that, unlike an alternative multi-stratal model in particular, it provides a good tool of analysis in that it uses a single constraint hierarchy. However, it still needs to introduce intermediate steps or derivation-like steps. On the contrary, the harmonic parallelism approach provides a good account of phonological opacity shown in spirantization, which has been problematic for classic OT, by using the notion of ‘trace’. It is more advantageous in economy than the harmonic serialism approach in that it does not accept the notion of derivation-like serial application, maintaining the fundamental stance of classic OT by using the notion of ‘trace’. In doing so, we have revised the previous constraints and presented a more generalized constraint *[+lax, -high -mid]wd instead of a very specific*[ɛ]wd. The overall constraint ranking is *[t/d+/NLF], Id-IO(pl) ≫ Id-IO(cont), *[z+ɪv/ɪvCI] ≫ Id-IO(voice), *[+lax,-high -mid]wd ≫ Max-IO.

`대중 신뢰`에 대한 인식과 제고 방안 도출 - 포럼 요약 -

박인규 한국원자력산업회의 2005 원자력산업 Vol.25 No.9

해방과 분단의 과정과 의미

박인규 중앙대학교 정경대학 학생회 1989 政經論集 Vol.23 No.1

중국 대학생들의 한국에 대한 국가이미지가 관광기대에 미치는 영향관계 분석

박인규,전희원 대한관광경영학회 2012 觀光硏究 Vol.27 No.5

국제관광 시장의 규모는 점진적으로 규모가 확대되면서 각 지역별 국가별로 관광은 경제·문화 등 다각적인 차원에서의 중요성이 날로 증대되고 있다. 국제관광객을 견인하는 키워드가 국가의 긍정적인 이미지와 국가의 국제경쟁력이라고 할 수 있다. 관광이미지에 대한 대다수의 선행연구에 의하면 관광객의 목적지 선택과정과 관광객행동을 설명하는 중요한 요소로 인정함에 따라 관광목적지와 결부된 국가이미지의 정확한 측정은 관광객들에게 부정적인 이미지를 수정 내지는 최소화하고 긍정적인 이미지를 고양시키는 마케팅전략의 중요한 자료가 될 수 있다. 연구결과를 살펴보면 중국학생들의 한국에 대한 국가 이미지 중 선진 국가, 역사 문화, 민주적인 요인이 관광기대 와 방문(재방문)에 미치는 영향은 관광정책차원의 시사점을 얻고자 하였다. 관광기대와 방문(재방문)에서 민주적인이 가장 큰 영향력을 보이는 변수로 나타나고 있으며, 역사 문화가 두 번째 영향력을 보이는 변수로 나타나고 있다. 본 연구의 결과를 바탕으로 올바른 정책수립과 홍보를 병행한다면 한국관광의 잠재군인 중국의 학생들이 관광목적지로 선택하는데 많은 도움이 될 것이다. As the market size of international tourism expands steadily, the importance of tourism by nation and region is getting increased in terms of multiple dimensions such as economy, culture, etc. The key word leading international tourists can be said as the positive images and competitiveness of the country. According to most of precedent studies on tourism, the accurate measurement of the country images combined with tourist destination can be important marketing materials for correcting or minimizing negative images or promoting positive images as it is accepted as essential element which can explain the selection process of tour destinations and behaviors by tourists. This study aimed at getting implications on the tourism policy by examining results of the study, that is, effects of the advanced country, history & culture and democratic element out of Korea's country images of Chinese students on visit and revisit. "Democratic" is shown as the variable which affects most tour expectation and visit (revisit), followed by history & culture. Based on results of this study, if right policy establishment and publicity is combined, it would be of great help for Chinese students, the potential group for Korean tour to choose Korea as their tour destination

권두언

박인규 대한지방행정공제회 2007 도시문제 Vol.42 No.469

권두언

박인규 대한지방행정공제회 2007 도시문제 Vol.42 No.465

권두언

박인규 대한지방행정공제회 2005 도시문제 Vol.40 No.439

Contact Angle of Water on Langmuir-Blodgett Films of Poly (γ-benzyl L-glutamate)/Poly(ethylene glycol)/Poly(γ-benzyl L-glutamate) Block Copolymer

박인규,강동완,Toshihiro Akaike,장민영,조정수 한국생체재료학회 2003 생체재료학회지 Vol.7 No.2

Contact angle of water on Langmuir-Blodgett (LB) film surface and cast film surface of poly(-benzyl L-glutamate)(PBLG)/poly(ethylene glycol)(PEG)/PBLG block copolymer was compared. The contact angle of water on the PBLG homopolymer and PBLG/PEG/PBLG block copolymers was dependent on the fabrication method. The contact angle of water on cast film surface decreased with an increase of PEG content in the copolymer, whereas that on the LB film was constant independent of the PEG content. Many more platelets adhered onto the LB surface than the cast one. Extensive morphological changes of the platelets adhered onto the LB surface were observed in comparison with the cast films.

Design and Optical Properties of Two-dimensional Photonic Crystals: A Finite-Difference Time-Domain Numerical Simulation Study

박인규,김선만,이건준,이영백,김지혜 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.51

In this research, the photonic band structures and the transmittance spectra are obtained by solving Maxwell equations using the finite-difference time-domain method. Two-dimensional (2D) square-lattice photonic crystals (PCs) were designed such that the center wavelength of photonic bandgap (PBG) could be located near 800 nm. %The optimized 2D square-lattice PC has ε_H = 7.0, ε_L = 1.0, the lattice constant = 287 nm, and the radius of lattice (r_H) = 0.3 a.%. The square-lattice PC shows a complete PBG between 711 and 841 nm. The proposed square-lattice PC can be created by the interference of four umbrella beams.For the interference of four umbrella beams with a wavelength of 400 nm and the crossing angle of 47.3˚, the interference pattern has square lattice-like profile with the lattice constant of 272 nm. %As applications of 2D square-lattice PCs, we investigated the optical properties of the linear waveguide, the 90˚-bent waveguide, and the interferometer formed by introducing proper defects to 2D square-lattice PCs. %Similarly with 2D square-lattice PCs by four beam interference, 2D triangular lattice PCs can be created by three beam interference. 2D Triangular lattice PC with the lattice constant of 287 nm can be created by the interference of three umbrella beams with a wavelength of 400 nm and the crossing angle of 68˚. The corresponding 2D triangular lattice PC shows a complete PBG between 706 nm and 916 nm.