• Title/Summary/Keyword: Parallax

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A Novel 3D Display Using Reactive Mesogen Optical Elements

  • Su, Chun-Wei;Lien, Jan-Tien;Liu, Chun-Hsiu
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.1361-1362
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    • 2009
  • We challenge to use reactive mesogen optical elements which can be coated inside LC cell. The reactive mesogens as retarder barrier requirements can be achieved between a high performance 2D mode and a low cross talk stereoscopic 3D mode. The fabrication of a 10.1" diagonal LCD which co-operates with a polarizer to from a parallax barrier, is described. In addition, the parallax barrier of reactive mesogens can easily control in mass production and can thus be coated as extremely LC cell, significantly reducing the thickness of LCD. Finally, we have successed to design a switchable 2D/3D displays using reactive mesogen optical elements which can be achieved 3D displays within glasses.

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Development of Image-space Telecentric Lens for Intra-Oral 3D Scanner

  • Kim, Tae Young;Shin, Min-Ho;Chang, Ryungkee;Kim, Young-Joo
    • Journal of the Optical Society of Korea
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    • v.19 no.3
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    • pp.303-310
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    • 2015
  • An image-space telecentric lens for an intra-oral 3D scanner was designed and fabricated for dental application. Since a telecentric function can provide the same results regardless of image plane position, it helps to realize a more accurate image for an intra-oral scanner. The performance of the designed lens meets the required properties for HD resolution. In particular, lateral color is corrected within 1 pixel. This system achieves depth of focus of more than 3 mm. For user convenience, the developed system consists of a prism part and an imaging part. Both parts are optimized to reduce the front size and weight of the system. In order to make the parallax sights, parallax angle was determined to be 8 degrees between two optical systems.

Innovative Method to Expand a Degree of Freedom of Observation in the Depth Direction without Losses of the Horizontal Number of Views in Autostereoscopic Multi-Views 3D Display System (시차장벽식 무안경 다시점 입체디스플레이 시스템에서 수평방향의 시점 수 저하 없이 깊이방향의 자유도를 증가시키기 위한 혁신적 방법)

  • Lee, Kwang-Hoon;Park, Min-Chul
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38C no.10
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    • pp.903-910
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    • 2013
  • An autostereoscopic multi-view 3D display system has the narrower degrees of freedom in the observational directions, such as the horizontal and perpendicular directions to the display plane, than the glasses-on type of 3D display. In this paper, we propose an innovative method to expand the width of the viewing zone formed in the depth direction while maintaining the number of views in the horizontal direction by using a triple segmented-slanted parallax barrier (TS-SPB) in the glasses-off type of 3D display. The validity of the proposal was verified by an optical simulation based on an environment similar to an actual case. The maximum number of views that can be displayed in the horizontal direction is 2n, and the width of the viewing zone with depth increased up to a factor of 3.36 compared to the existing one-layered parallax barrier system.

Super Multi-View 3D Display Using Liquid-Crystal Shutter Glasses and Parallax Barrier (액정 셔터 안경방식 3D 디스플레이와 패럴랙스 베리어를 이용한 초다시점 3D 디스플레이)

  • Lee, Hyun-Min;Kwon, Ki-Chul;Park, Jae-Hyeung;Kim, Sung-Kyu;Min, Sung-Wook;Kim, Nam
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.39C no.2
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    • pp.130-138
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    • 2014
  • In this paper, the SMV 3D display method using liquid crystal shutter glass(LCSG) and SPB has been proposed. The proposed SMV display can solve the resolution degradation problem of conventional multiview displays that using based time-multiplexing method. Also, observers fatigue due to the mismatch between accommodation and vergence problem of glass-type 3D displays and conventional multiview displays, can be improved using SMV 3D display method.

The depth quality enhancement algorithm for Autostereoscopic 3D Monitor (무안경 3D 모니터를 위한 Depth 화질 향상 Algorithm)

  • Song, Sung-Ho;Lee, Kyoung-Il;Lee, Dong-Ha;Park, Jong-Cheol;Lee, Jea-Jun;Kim, Young-Kil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.05a
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    • pp.133-136
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    • 2012
  • In this paper, we found the many effective ways and apply for improve the 3D quality of Autostereoscopic 3D display products. Autostereoscopic products compared to traditional 3D glasses, the disadvantage is the poor depth of 3D picture quality and it only can see the fixed distance and position. So, for the compensate this disadvantage, we use the Head tracking technology and video placement algorithms and several techniques. In this paper, the will report on how to improve the Parallax Barrier Autostereoscopic 3D quality through the Head tracking of the user identification, video replacement algorithms and crosstalk improving method.

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A Study on Parallax Registration for User Location on the Transparent Display using the Kinect Sensor (키넥트 센서를 활용한 투명 디스플레이에서의 사용자 위치에 대한 시계 정합 연구)

  • Nam, Byeong-Wook;Lee, Kyung-Ho;Lee, Jung-Min;Wu, Yuepeng
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.28 no.6
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    • pp.599-606
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    • 2015
  • International Hydrographic Organization(IHO) adopted standard S-100 as the international standard Geographic Information System(GIS) that can be generally used in the maritime sector. Accordingly, the next-generation system to support navigation information based on GIS standard technology has being developed. AR based navigation information system that supported navigation by overlapping navigation information on the CCTV image has currently being developed. In this study, we considered the application of a transparent display as a method to support efficiently this system. When a transparent display applied, the image distortion caused by using a wide-angle lens for parallax secure, and the disc s, and demonstrated the applicability of the technology by developing a prototype.

Astrometric Detectability of Parallax Effect in Gravitational Microlensing Events (중력렌즈 사건의 측성적 시차효과 검출에 대한 연구)

  • HAN CHEONGHO
    • Publications of The Korean Astronomical Society
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    • v.15 no.1
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    • pp.15-19
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    • 2000
  • The lens mass determined from the photometrically obtained Einstein time scale suffers from large uncertainty due to the lens parameter degeneracy. The uncertainty can be substantially reduced if the mass is determined from the lens proper motion obtained from astrometric measurements of the source image centroid shifts, ${\delta}{\theta}_c$, by using high precision interferometers from space-based platform such as the Space Interferometry Mission (SIM), and ground-based interferometers soon available on several 8-10m class telescopes. However, for the complete resolution of the lens parameter degeneracy it is required to determine the lens parallax by measuring the parallax-induced deviations in the centroid shifts trajectory, ${\Delta}{\delta}{\theta}_c$ aloe. In this paper, we investigate the detectabilities of ${\delta}{\theta}_c$ and ${\Delta}{\delta}{\theta}_c$ by determining the distributions of the maximum centroid shifts, $f({\delta}{\theta}_{c,max})$, and the average maximum deviations, $(<{\Delta}{\delta}_{c,max}>)$, for different types of Galactic microlensing events caused by various masses. From this investigation, we find that as long as source stars are bright enough for astrometric observations it is expected that $f({\delta}{\theta}_c)$ for most events caused by lenses with masses greater than 0.1 $M_\bigodot$ regardless of the event types can be easily detected from observations by using not only the SIM (with a detection threshold but also the ${\delta}{\theta}_{th}\;\~3{\mu}as)$ but also the ground-based interferometers $(with\;{\delta}{\theta}_{th}\;\~3{\mu}as)$. However, from ground-based observations, it will be difficult to detect ${\Delta}{\delta}{\theta}_c$ for most Galactic bulge self-lensing events, and the detection will be restricted only for small fractions of disk-bulge and halo-LMC events for which the deviations are relatively large. From observations by using the SIM, on the other hand, detecting ${\Delta}{\delta}{\theta}_c$ will be possible for majority of disk and halo events and for a substantial fraction of bulge self-lensing events. For the complete resolution of the lens parameter degeneracy, therefore, SIM observations will be essential.

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