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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Optical Society of Korea
Journal Basic Information
Journal DOI :
Optical Society of Korea
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Volume & Issues
Volume 5, Issue 4 - Dec 2001
Volume 5, Issue 3 - Sep 2001
Volume 5, Issue 2 - Jun 2001
Volume 5, Issue 1 - Mar 2001
Selecting the target year
Measurement of Birefringence with Brillouin Spectroscopy
Lee, Suk-Mock ; Hwangbo, Chang-Kwon ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 67~69
DOI : 10.3807/JOSK.2001.5.3.067
An alternative way to determine the birefringence for uniaxial crystals with Brillouin scattering experiments equipped with a Fabry-Perot interferometer is presented. The value of the minimum cavity spacing of the interferometer to observe the birefringence was found, and it is shown that the experimental error of the birefringence could be reduced by increasing the cavity spacing. For a single crystal of
, the birefringence was found to be 0.14814
0.0007 at 514.5 nm.
Developing an Optical Testing Method for Space Telescopes
Kim, Young-Soo ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 70~75
DOI : 10.3807/JOSK.2001.5.3.070
Next Generation Space Telescope (NGST) is under design study for proposed launch around 2008. It will take over the task of Hubble Space Telescope (HST) and provide much more detailed information about celestial objects. Present large telescopes both in space and on the ground contain aspheric mirrors, called Ritchey-Chretien type. As the size of the telescope becomes larger and the optical quality is requested to be higher, reaching the diffraction limit, more accurate optical testing methods are required. However, there are few testing methods which can achieve the required accuracy for aspheric optics, and none of them has achieved it with certainty. The failure of producing the primary mirror of the Hubble Space Telescope to meet specification is a good example. Moreover, testing aspheric mirrors of large convex form adds the difficulty to extreme. In this paper, space telescopes and large ground-based telescopes are surveyed and testing methods for aspheric optics are reviewed. a method of testing aspheric convex mirrors is suggested.
Optical Response of Traveling-Wave Optical Modulator with 3-Section Phase Reversal
Kim, Chang-Min ; Han, Young-Tak ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 76~82
DOI : 10.3807/JOSK.2001.5.3.076
The optical response for traveling-wave Mach-Zehnder modulators without-with phased reversal is successfully derived in more concise and succinct form than any other equations before. The obtained equation is applied to a bandpass traveling-wave modulator with 3-section phase reversal and is confirmed to be in reasonable agreement with the experimental data.
Quasi-Continuous Operation of 1.55- μm Vertical-Cavity Surface-Emitting Lasers by Wafer Fusion
Song, Dae-Sung ; Song, Hyun-Woo ; Kim, Chang-Kyu ; Lee, Young-Hee ; Kim, Jung-Su ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 83~89
DOI : 10.3807/JOSK.2001.5.3.083
Room temperature quasi-continuous operation is achieved near 1556 nm with threshold current as low as 2.2 mA from a 5.6-
oxide-aperture vertical-cavity surface-emitting laser. Wafer fusion techniques are employed to combine the GaAs/AlGaAs mirror and the InP-based InGaAs/InGaAsP active layer. In this structure, an
/GaAs distributed bragg reflector and intra-cavity contacts are used to reduce free carrier absorption.
Stereoscopic Operators and Their Application
Gruts, Yu.-N. ; Son, Jung-Young ; Kang, Dong-Hoon ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 90~92
DOI : 10.3807/JOSK.2001.5.3.090
Direct and inverse mathematical operators of stereo transformation (stereo operators) are studied in this paper. The stereo operators install a one-to-one correspondence between three dimensional coordinates of any point in space and the stereo coordinates which can be displayed on the screen under the given conditions, i.e. stereo vision base and the position of viewer. The stereo operators can be applied to the analyses of stereoscopic image distortions when the stereo vision base and the position of viewer are changed.
Performance of the Two-Stage Iterative Fourier Transform Allgorithm for Designing Phase-Only Diffractive Pattern Elements
Jung, Phil-Ho ; Cho, Doo-Jin ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 93~98
DOI : 10.3807/JOSK.2001.5.3.093
In order to verify the performance of the two-stage iterative Fourier transform algorithm[Hankook Kwanghak Hoeji 11, 47 (2000)], a number of phase-only diffractive pattern elements which produce simple 16x16-pixel intensity patterns useful in the field of optical information processing have been designed and their performance has been compared with that from the nonlinear least-squares algorithm[Appl. Opt. 36, 7297(1977)] which is computationally intensive. for all intensity patterns, elements designed by the former algorithm show better overall signal-to noise ratio and uniformity, although they show essentially the same diffraction efficiency. In the case of continuous phase elements, they show far superior uniformity. Computationally,. the former algorithm is far more efficient than the latter.
Three-Dimensional Phase-Only Holographic Correlation
Kim, Tae-Geun ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 99~109
DOI : 10.3807/JOSK.2001.5.3.099
This paper presents a phase-only modulation scheme for a three-dimensional (3-D) image matching system to improve optical efficiency of the system. The 3-D image matching system is based on the two mask heterodyne scanning. A hologram of the 3-D reference object is first created and then the phase of the hologram is extracted. The phase of the hologram is represented as one mask with the other mask being a plane wave. The superposition of each beam modulated by the two masks generated a scanning beam pattern. This beam pattern scans the 3-D target object to be recognized. The output of the scanning system gives out the correlation of the phase-only hologram of the reference object and the complex hologram of the target object. Since a hologram contains 3-D information of an object as a form of fringe pattern, the correlation of holograms matches whole 3-D aspect of the objects. Computer simulations are performed with additive gaussian noise and without noise for the complex hologram modulation scheme and the phase-only hologram modulation scheme. The computer simulation results show that the phase-only hologram modulation scheme improves the optical efficiency. Thus the system with the phase-only hologram modulation scheme is more robust than the system with the complex hologram modulation scheme.
Dark Resonance and Its Potential Applications: High-Resolution Spectroscopy
Ham, Byoung-Seung ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 110~116
DOI : 10.3807/JOSK.2001.5.3.110
Recently observed dark resonance phenomena is solids are reviewed and discussed for potential applications to high-resolution coherence spectroscopy. in an inhomogeneously broadened system, a new type of high-resolution spectroscopy based on electromagnetically induced transparency is demonstrated.
Study of Three-Dimensional Display System Based on Computer-Generated Integral Photography
Lee, Byoung-Ho ; Jung, Sung-Young ; Min, Sung-Wook ; Park, Jae-Hyeung ;
Journal of the Optical Society of Korea, volume 5, issue 3, 2001, Pages 117~122
DOI : 10.3807/JOSK.2001.5.3.117
A three-dimensional (3D) display system based on computer-generated integral photography (CGIP) is proposed and its feasibility is discussed. Instead of the pickup process in conventional IP, the elemental images of imaginary objects are computer-generated. Using these images, we observed autostereoscopic 3D images in full color and full parallax. The lateral and depth resolutions of the integrated images are limited by some factors such as the image position, object thickness, the lens width, and the pixel size of display panel.