• Current Optics and Photonics
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• v.2 no.2
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• pp.172-178
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• 2018

We propose a precise 3D endoscopic technique for medical and industrial applications. As the 3D measuring principle, the continuously scanning structured illumination microscopy (CSSIM), which enables to obtain 3D sectional images by the synchronous axial scanning of the target with the lateral scanning of the sinusoidal pattern, is adopted. In order to reduce the size of the probe end, the illumination and detection paths of light are designed as coaxial and a coherent imaging fiber bundle is used for transferring the illumination pattern to the target and vice versa. We constructed and experimentally verified the proposed system with a gauge block specimen. As the result, it was confirmed that the 3D surface profile was successfully measured with $16.1{\mu}m$ repeatability for a gauge block specimen. In order to improve the contrast of the sinusoidal illumination pattern reflected off on the target, we used polarizing optical components and confirmed that the visibility of the pattern was suitable in CSSIM.

• Journal of KIISE:Software and Applications
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• v.33 no.10
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• pp.868-876
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• 2006

2D input data have to be converted into 3D data by means of some functions and menu system in 2D input modeling system. But data in 3D input system for virtual spatial design can be directly connected to the 3D modeling data. Nevertheless, efficient surface modeling and deformation algorithm for the 3D input modeling system are not proposed yet. In this paper, problems of conventional NURBS surface deformation methods which can occur when applied in the 3D input modeling system are introduced. And NURBS surface deformation by 3D target curves, in which the designer can easily approach, are suggested. Designer can efficiently implement the virtual spatial sketching and design by using the proposed deformation algorithm.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2000.11a
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• pp.12-12
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• 2000

This paper investigated the effect of the film deposition rate for $CrN_x$ microstructure and mechanical properties. For these purpose, pure Cr an stoichiometric CrN films were deposited with various target power density on Si hardened M2 tool steel. The variation of ni trogen concentration in $CrN_x$ f analyzed by AES and deposition rate was calculated by measuring of thickness using ${\alpha}-step$ profilometer. The microstructure was analyzed by X-Ray Diffract and Scanning Electron Microscopy(SEM), and mechanical properties were evalua residual stress, microhardness and adhesion tests. Deposition rate of Cr and CrN increased as an almost linear function of target power density from $0.25\mu\textrm{m}/min$ and $0.15\mu\textrm{m}/min$ to $0.43\mu\textrm{m}/min$. Residual stresses of Cr and CrN films were from tensi Ie to compressive stress with an increase of deposi tion rate a compressive stresses were increased as more augmentation of deposition r maximum hardness value of $2300kg/\textrm{mm}^2$ and the best adhesion strength correspond HF 1 were obtained for CrN film synthesized at the highest target densitY($13.2W/\textrm{mm}^2$) owing to high residual compressive stress and increasing mobility.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.33B no.2
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• pp.10-19
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• 1996

This paper presents a finger-shaped multisensor system which can measure the tyep and position of a target surface by contactl. The multi-sensor system consists of a sphere-shpaed optical tactile sensor located at the finger tip and a force/torque sensor located at the joint of a finger. The optial tactile sensor determines the type and position of the target surface using the shape and position of the CCD image of the touching area generated by a contact between the sensor and the taget surface. The force/torque sensor also determines the position and surface normal vector by applying the distributionof forces and torques t the contact point to the equations of finger shape. The measurements on the position and surface normal vector at a contact point obtined by two individual sensors are fused using a statistical method. The integrated sensor system has 0.8mm error in position measurement and 1.31$^{\circ}$ error in normal vector measurement. The developed sensor system has many applications, such as autonomous compliance control, automatic grasping and recognition, etc.

• Korean Journal of Computational Design and Engineering
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• v.12 no.6
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• pp.441-451
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• 2007

In this paper, the method to modify a surface through three dimensional vector field technique is presented, In this method two guide surfaces are required as a shape reference. One is the shape of original surface, the other is the target shape for the result surface. Proposed method is consists of two steps. The first step is to calculate the mapping points on original and target guide surfaces so that the shape error may be minimized. The second step is to construct the smooth vector field from mapping points of the first step. The developed method is applied to shoe design system which makes the surface modeling very easy and effective.

• Journal of the Korea Institute of Military Science and Technology
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• v.15 no.2
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• pp.208-214
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• 2012

The spectral radiance received by a remote sensor is consisted of the self-emitted component directly from the target surface, the reflected component of the solar irradiance at the target surface, and the scattered component by the atmosphere without ever reaching the object surface. In general, the self-emitted component is the most important part in the infrared signatures from the target. We measured the solar irradiation, sky irradiation, air temperature, wind velocity, wind direction, relative humidity, and atmospheric pressure together with the surface temperatures of rectangular parallelepiped targets. The measured diurnal surface temperature variations on the three different rectangular parallelepiped targets constructed by the steel, aluminum and bakelite are obtained at the same time intervals. The measured surface temperature results show that the top surface temperature of bakelite recorded up tp $7.6^{\circ}C$ higher than that of aluminium and $6.1^{\circ}C$ higher than that of steel at 11 AM on the sunny condition. A complete set of measured data including the surface temperature of rectangular parallelepiped targets together with the detailed weather information can be a valuable reference for future study.

• KSBB Journal
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• v.10 no.4
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• pp.428-434
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• 1995

Target-sensitive(TG-S) liposomes, which have the antibodies coupled on the surface of liposome and can release their entrapped contents by the binding of antibodies with the specigic target cells, were prepared and employed to study the release of calcein and the selective delivery of an anticancer agent, doxorubicin(DOX). The monoclonal antibody, Y3, used for the preparation of the TG-S liposome was one against major histocompatibility complex class 1 of mouse(MHCI, H-2Kｂtype) and the target cells were EL-4 and RMA, which have the MHC1, H-2Kbtype on their membrane surfacem. The release of calcein from TG-S liposome occurred when the target cells were contacted with liposomes and it was proportionally increased with the rise of binding capacity of antibody coupled on the surface of liposome to the target cells. The experimental results of drug delivery were similar to the cases of calcein release. The viability of specific target cell, EL-4 with liposomal DOX was not so different from that with the free DOX, while for the non-specific target cell, Yacl(H-2Kf), the cell viability with Iiposomal DOX was much higher than that with free DOX. This shows the fact that the liposomal DOX can be efficiently delivered to the specific target cells, while it was not the case for the non-specific target cells. And the drug delivery was lnhibited when the free antibody of Y3 was added in the contact process between EL-4 and TG-S liposomes, which means the drug delivery occurred mainly by the destabilization of TG-S liposomes. From these results, we could conclude that the selective drug delivery to specific target cell using the TG-S liposome would be feasible.

• Journal of the Korean institute of surface engineering
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• v.47 no.1
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• pp.53-56
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• 2014

I-V characteristics of a cylindrical target in an ECR plasma were studied for sheath spatial evolutions when the target was pulsed biased to a high negative potential. The magnetic field effects on sheath thickness and sheath boundary speed were investigated by comparison between the experimental results and the theoretical results using the Child-Langmuir sheath model. The results showed that the magnetic field suppressed electron motion away from the target so that sheath thickness and sheath boundary speed decreased.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2012.11a
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• pp.113-114
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• 2012

본 연구는 segment target을 사용하여 unbalanced magnetron sputtering을 활용하여 고 CrZr-Si-N 박막을 합성하고 박막의 미세구조 및 마모 특성을 연구하는데 그 목적이 있다. 박막의 Si 함량을 조절하기 위하여 각 segment target은 Cr,Zr을 일정vol% 유지하며 Si vol%만 변화하여 설계하였다. Si 함량별로 제작된 마모실험 시편의 미세구조는 XRD, FE-SEM, AFM, TEM을 통하여 분석하였으며, ball on disk type의 마모 시험기를 통해 그 마모 특성을 분석하였으며,

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2007.11a
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• pp.103-104
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• 2007

$CuInO_2$ 단일상은 합성조건이 매우 까다롭기 때문에 일반적인 고상법으로 얻기 힘든 것으로 알려저 있다. 투명전도성 $CuInO_2$ 박막을 증착하기 위하여 일반적인 고상법으로 Cu와 In의 비율이 1:1인 $Cu_2O-In_2O_3$ composite target 및 In 대신 Ca, Mg, Ti가 각각 1mol% 도핑된 target을 제작하였다. 제작된 각각의 composite target을 이용하여 pulsed laser deposition(PLD) 공정으로 투명전도성 $CuInO_2$ 박막을 증착하였다. Cu와 In이 1:1 인 $Cu_2O-In_2O_3$ composite target을 사용한 경우, 증착된 박막이 Cu와 In의 비율이 1:1인 c-axis 배향된 단일상의 $CuInO_2$ 박막임을 확인하였다.