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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Optics and Photonics
Journal Basic Information
Journal DOI :
Optical Society of Korea
Editor in Chief :
Volume & Issues
Volume 20, Issue 6 - Dec 2009
Volume 20, Issue 5 - Oct 2009
Volume 20, Issue 4 - Aug 2009
Volume 20, Issue 3 - Jun 2009
Volume 20, Issue 2 - Apr 2009
Volume 20, Issue 1 - Feb 2009
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Design of an Endoscopic Microscope Objective Composed of GRIN(Gradient-Index) Lens with Scanning Devices
Kim, Keyong-Jeong ; Rim, Cheon-Seog ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 311~318
DOI : 10.3807/KJOP.2009.20.6.311
We present an attractive real time in-vivo endoscopic microscope with a resolution of submicron, in which two kinds of optical correcting plates are inserted to eliminate higher order spherical aberration and field curvature. And, since the conventional objective lens is replaced to GRIN lenses with diameter of 1 mm, the above endoscopic microscope can be effectively utilized to invade minimally for live animals.
Design of Two-group Zoom Lens System with Wide Angle of View Using Global Structure Function
Kwon, Hyuk-Joon ; Rim, Cheon-Seog ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 319~327
DOI : 10.3807/KJOP.2009.20.6.319
We introduce a new design technique by treating a two-group zoom lens system with a wide angle of view. First, the concept of the global optimization is introduced in the initial design stage, and from this, the global design technique is completed by analyzing and summarizing large quantities of modern design data. That is, we define the global structure function to achieve a new conceptual design technique for global optimization. And the function is put in a simple form by referring lots of patent data, manipulated with other algebraic equations, and solved finally such that we obtain the global solution region. The global solution region corresponds to the global optimization and suggests insightful systematized directions for the design of two-group zoom lens systems. These directions are attractive compared to global optimization.
Three-dimensional Holographic Display with Twin Image Noise Rejection Using Off-axis Hologram Converting
Kim, You-Seok ; Kim, Tae-Geun ; Kim, Jin-Tae ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 328~333
DOI : 10.3807/KJOP.2009.20.6.328
We proposed a three-dimensional holographic display technique without twin image noise by converting a complex hologram to an off-axis hologram. To implement the proposed technique we record the complex hologram of a three dimensional object that is composed of two slides located with different depth locations. We added spatial carrier to the complex hologram and after that, extract the real part of the spatial-carrier-added hologram. This converts the complex hologram to an off-axis hologram. We also reconstruct the off-axis hologram using a spatial light modulator for three dimensional display.
Total-internal-reflection Holographic Photo-lithography by Using Incoherent Light
Lee, Joon-Sub ; Park, Woo-Jae ; Lee, Ji-Whan ; Song, Seok-Ho ; Lee, Sung-Jin ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 334~338
DOI : 10.3807/KJOP.2009.20.6.334
Recently, with increasing demand for flat-panel display product, methods for large area patterning are required. TIR (total internal reflection) holographic photo-lithography isstudied as one of the methods of large area lithography. In conventional TIR holography, light sources for hologram recording and image reconstruction are coherent beams such as laser beams. If the image is reconstructed with an incoherent light source such a UV lamp, the image noise from the coherence of light will be reduced and the UV lamp will be a better light source for large area exposure. We analyzed the effect of spectral bandwidth and angular bandwidth of the light source in image reconstruction and verified image blurring with experiments. For large area patterning which has micro-scale line width, it is expected that TIR holographic photo lithography by UV lamp will become a low-noise and low-priced technique.
High Power and Single Mode Lasing Characteristics in Vertical Cavity Surface Emitting Laser by Varying Photonic Bandgap Structures
Lee, Jin-Woong ; Hyun, Kyung-Sook ; Shin, Hyun-Ee ; Kim, Hee-Dae ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 339~345
DOI : 10.3807/KJOP.2009.20.6.339
The high power and single mode vertical cavity surface emitting laser(VCSEL)s with photonic crystal structures have been proposed and fabricated by reducing substantially the hole numbers used in the photonic crystal structures. It is found that only six holes enable VCSELs to operate a single mode and the reliability can be enhanced by filling the holes with polyimide. The single mode lasing characteristics were analyzed by varying the oxide aperture and the hole diameter in photonic crystal structures. As a result, the single mode lasing can be stably obtained in the photonic crystal vertical cavity surface emitting lasers.
Measurement of Glucose and Protein in Urine Using Absorption Spectroscopy Under the Influence of Other Substances
Yoon, Gil-Won ; Kim, Hye-Jeong ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 346~353
DOI : 10.3807/KJOP.2009.20.6.346
Glucose and protein in urine are among the important substances for urine analysis and have generally been measured based on a reagent strip test. In this study, these two substances were measured using mid-infrared absorption spectroscopy. Samples were prepared from a commercial synthetic urine product. Glucose and albumin were added as well as red blood cells, which are expected to create the most spectroscopic interference of any substance. Concentrations of these substances were varied independently. Optimal wavelength regions were determined from a partial least squares regression analysis (glucose 980 - 1150/cm, albumin 1400 - 1570/cm). Interference by other substances increased the differences between measured and predicted values. Albumin measurement in particular weres heavily influenced by the presence of glucose and red blood cells. Depending on the inference by other substances, measurement errors were 29.85
45.19 mg/dl for a glucose level between 0 and 1000 mg/dl and 14.0
93.11 mg/dl for an albumin level of 0
500 mg/dl. Our study proposes an alternative to the chemical test-strip analysis, which shows only discrete concentration levels.
Multi-focal Microscopic System Using a Fiber Bundle
Gu, Young-Mo ; Ham, Hyo-Shick ; Choi, Sung-Eul ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 354~360
DOI : 10.3807/KJOP.2009.20.6.354
We have constructed and analyzed the performance of a simple fiber bundle multi-focal microscope. The microscope had a fiber bundle substituted for micro-lens array that is the core part of MMM(multi-focal multi-photon microscope). The MMM is a type of confocal microscope. To analyze the performance and characteristics of the fiber bundle multi-focal microscope, three types of samples were used: a standard grating, USAF 1951(7, 3), and 1951(7, 6). Using two polarizers and a polarizing beam splitter, we eliminated noise and got clear images. We obtained the FWHM of fiber spot images with the standard grating using two different magnifier lenses which were 63X and 20X, and found an image of the sample as a distribution of fiber spot images. For this case we used the low magnification lens, which gives denser distribution, so that we could get clearer images. In order to test the resolution of the fiber bundle multi-focal microscopic system, we used the USAF 1951 sample which has a smaller line interval than that of the standard grating. The FWHM of the line width of the image coincides well with the real line width of the USAF 1951 sample. We confirmed the performance of a fiber bundle multi-focal microscopic system which is relatively simple but has submicron resolution and is able to get 1600 images at the same time.
BGA Height Measurement Using Pattern Beam
Shin, Sang-Hoon ; Yu, Young-Hun ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 361~365
DOI : 10.3807/KJOP.2009.20.6.361
We describe a simple method to obtain an optical sectioning in a conventional wide-field microscope by projecting a single spatial frequency grid pattern onto the object. Using a patterned beam, we have measured the height of BGA with a rough surface that provide the coherence noise. The configuration of the height measurement system using pattern beam is simple. The image acquired by this system is not depend on the coherence noises. This system is also applicable to the sample reference plan that has no pattern on ground. The reappearance and accuracy are outstanding and applicable to many industrial optical metrology.
Scattering of a Normally Incident Monochromatic Light by Optically Active Concentric Double Cylinders: I. Analytic Theory
Kim, Hyun-Woo ; Kim, Jin-Seung ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 366~374
DOI : 10.3807/KJOP.2009.20.6.366
An analytic solution is obtained for the problem of monochromatic light scattering by optically active, concentric double cylinders. The validity of the obtained solution is indirectly checked by comparing it with solutions already reported for some special cases. The solution can be used in the optical analysis of rod-shaped biological cells which possibly have optically active nuclei containing helically wound chromosomes.
Scattering of a Normally Incident Monochromatic Light by Optically Active Concentric Double Cylinders: II. Numerical Result
Kim, Hyun-Woo ; Kim, Jin-Seung ;
Korean Journal of Optics and Photonics, volume 20, issue 6, 2009, Pages 375~380
DOI : 10.3807/KJOP.2009.20.6.375
The scattering of a normally incident monochromatic light by optically active concentric double cylinders is studied by using a numerical method. A numerical code is developed on the basis of the analytical solutions, and the angular distributions of the intensity and the polarization of the scattered light are computed for some specific cases. The numerical code can be used to non-invasively determine the size, structure, and composition of a double cylinder with high accuracy by measuring the angular distribution of the scattered light by an experiment.