최근의 한일경제협력 실태와 향후 추진방향

임천석(任千錫) 고려대학교 아세아문제연구소 2000 한일공동연구총서 Vol.2000 No.3

초고해상도의 기가픽셀 디지털이미지 획득을 위한 로봇 카메라의 시차연구

임천석 한국광학회 2020 한국광학회지 Vol.31 No.1

First, if we want to design and construct a robotic camera, we need to understand the parallax errors between adjacent images, caused by rotation and movement of the robotic camera system. In this paper, we try to derive the mathematical formulation of parallax error and connect it to a conventional lens system, to obtain a useful, generalized, analytic algebraic expression for the parallax error. Utilizing this expression, we can structurally design a robotic camera, and study the Google ART camera as an example of a robotic camera.

The Optical Design of Miniaturized Microscope Objective for CARS Imaging Catheter with Fiber Bundle

임천석 한국광학회 2010 Current Optics and Photonics Vol.14 No.4

In coherent anti-Stokes Raman scattering (CARS) microscopy reported until now, conventional microscope objectives are used, so that they are limited for introduction into a living body. Gradient-index (GRIN) rod lenses might be a solution for miniaturized microscope objectives for in-vivo CARS microscopy. However, due to the inherent large amount of chromatic aberration, GRIN rod lenses cannot be utilized for this purpose. CARS imaging catheter, composed of miniaturized microscope objective and fiber bundle, can be introduced into a living body for minimally invasive diagnosis. In order to design the catheter, we have to first investigate design requirements. And then, the optical design is processed with design strategies and intensive computing power to achieve the design requirements. We report the miniaturized objective lens system with diffraction-limited performance and completely corrected chromatic aberrations for an in-vivo CARS imaging catheter.

The Optical Design of Probe-type Microscope Objective for Intravital Laser Scanning CARS Microendoscopy

임천석 한국광학회 2010 Current Optics and Photonics Vol.14 No.4

A stack of gradient-index (GRIN) rod lenses cannot be used for coherent anti-Stokes Raman scattering (CARS) microendoscopy for insertion to internal organs through a surgical keyhole with minimal invasiveness. That’s because GRIN lens has large amount of inherent chromatic aberrations in spite of absolutely requiring a common focus for pump and Stokes beam with each frequency of ωp and ωS. For this endoscopic purpose, we need to develop a long slender probe-type objective, namely probe-type microscope objective (PMO). In this paper, we introduce the structure, the working principle, and the design techniques of PMO which is composed of a probe-type lens module (PLM) and an adaptor lens module (ALM). PLM is first designed for a long slender type and ALM is successively designed by using several design parameters from PLM for eliminating optical discords between scanning unit and PLM. A combined module is optimized again to eliminate some coupling disparities between PLM and ALM for the best PMO. As a result, we can obtain a long slender PMO with perfectly diffraction-limited performance for pump beam of 817 nm and Stokes beam of 1064 nm.

제3부 주제발표 : 중소기업학회 춘계학술대회 발표 ; 일본 중소기업의 중국진출에 관한 연구 -당면문제와 지원실태를 중심으로-

임천석 ( Im Cheon Seog ) 한국중소기업학회 2004 한국중소기업학회 춘계학술발표논문집 Vol.2004 No.-

일본시장의 특징과 한국상품의 對日수출전략

임천석 한일경상학회 2009 韓日經商論集 Vol.45 No.-

The purpose of this research is to show and analyze in detail the characteristic of Japanese market and through that to present a strategy for broadening Korean exportation to Japan. Until these days, most of researches were focused on the characteristic of Japanese trade structure, but only few researches focus on Japanese enterprises which are in competition with foreign companies. Considering the difficulties of the entrance of foreign companies into Japanese market, this research has made an attempt to analyze Japanese enterprises which have strong competitiveness in many industries. From 2002, among the Japan's imports, China took the first place, this research has focused on products in China, its characteristic and its present condition. This research also has paid attention to Japanese manufacturing industry, its production in China and the reimportation of the products and imports by Japanese trade industry. There are not only an observation concerning a trend and the latest changes in Japanese trade industry, but also analytics about successful case of Korean exports to Japan and presentation of a possible plan for its expansion.

현대 광공학 개론 I : 기하광학

임천석,조재흥,Im, Cheon-Seok,Jo, Jae-Heung 한국광학회 2006 광학과 기술 Vol.10 No.2

멀티렌즈 스마트폰 카메라의 시차현상을 활용한 3차원 공간정보 획득 연구

임천석,Rim, Cheon-Seog 한국광학회 2021 한국광학회지 Vol.32 No.1

스마트폰 카메라의 멀티렌즈에서 발생되는 시차현상을 이용하여 실측의 3차원 공간정보를 획득할 수 있는 방법에 대해 연구를 진행하였다. 이를 위한 실험·계측법도 구상해 보았고 관련 방정식도 개발하였다. 본 연구결과를 스마트폰 카메라의 멀티렌즈에 적용하게 되면 건축이나 토목현장에서 스마트폰만으로 한 번에 전체 피사체의 3차원 공간정보를 손쉽게 획득하거나 골프장에서 핀까지의 거리가 얼마나 남았는지 편리하게 알아낼 수 있을 것이다. 멀티렌즈 스마트폰과 연계된 이 기술의 다양한 응용성을 기대해 본다. We try to extract three-dimensional information, such as the distance from a camera and the actual width and height of an object, from still photographs by a multilens smartphone camera, by means of parallax error. To obtain this information, we develop several formulas and design a method for experimental instrumentation. If the results from this paper were included in algorithms of multilens smartphone cameras, there would be various kinds of applications, such as in the workplace of architectural and civil engineering to obtain an actual dimension, or on a golf course to measure how far away a pin flag is. We expect many more applications of this study, because the multilens smartphone camera is already an important necessity of life.

일본 중소기업의 발전과정 분석과 시사점

임천석 한일경상학회 2017 韓日經商論集 Vol.74 No.-

Recently, number of SMEs which have developed under mass production system have been decreased in Japan. On the other hand, there are a lot of network-type SMEs that deal with new demand, such as R&D of large enterprises. Also, there are many innovative independent SMEs. However, in case of Korea, it seems that the independent and network-type SMEs are small, and they are still in the early stage. In this paper, we analyze the development process of SMEs in Japan and suggest the implications for the development of Korean SMEs. 최근 한국에서 중소기업의 역할과 필요성에 대한 관심이 커지고 있다. 이것은 수출과 고용, 투자 등에서 중소기업에 대한 기대가 커지고 있을 뿐만 아니라 앞으로 예상되는 산업구조의 변화에서 중소기업에게 기대되는 역할이 커지고 있기 때문이다. 한국에서도 그동안 중소기업 육성을 위해 다양한 정책과 노력을 추진하였으나 대기업과의 커다란 격차와 낙후성, 중소기업의 환경 변화에 대한 능동적인 대응력 미약 등이 큰 문제로 남아 있다. 반면 일본은 자동차, 전기전자 등의 대량생산기에 한국이 경험한 것과는 달리 부품의 대량수입이 없었고, 하청형, 독립형, 네트워크형으로 분류되는 다양한 중소기업이 형성․진화하고 있다. 본 연구에서는 이상과 같은 문제의식에서 일본 중소기업의 발전과정과 발전원인을 분석하고 이를 바탕으로 한국 중소기업 발전을 위한 시사점을 제시한다.

韓美 FTA와 日本의 對應

임천석 한국일본학회 2008 日本學報 Vol.75 No.-

Last April, Korea and U.S. agreed on establishing a FTA and have signed the agreement on last June. Due to Korea's organization's calculation and prospect, with the effectuation of the Korea-U.S. FTA, Korea's products exported to U.S. will be exempted from tax, which will bring a great advantage to Korea's exportation. However. the fact that in U.S. market, Korea's main competing countries are China, Japan, and Mexico and the fact that Japan is the main competing country in Korea's main export market(cars and electronics), need to be noted. Also, it can be predicted that Japan would consider multiple countermoves such as lowering the price of exported goods, increasing the production and utilizing NAFTA to catch up with Korea's competitive price. In this paper, economic relationship between Korea and the U.S. between Japan and the U.S. will be discussed as well as the competition between Korea and Japan in U.S. market. Also, the thesis will discuss Japan's evaluation on Korea-U.S. FTA and forecast Japan's countermoves.