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Papers by Ganbat Baasantseren

Research paper thumbnail of Aberration Compensated Point Light Source Display With High-Resolution

Frontiers in Photonics

A high-resolution enhanced point light source integral imaging display is proposed. Using additio... more A high-resolution enhanced point light source integral imaging display is proposed. Using additional light sources to create extra point light sources in the point light source plane, the point light sources appeared on the plane that deviated from the expected values because of aberrations in the lens. Previously, only the lens array aberration was corrected and the distance along the horizontal and vertical axes was corrected too. The objective of this paper is to simultaneously correct the aberration between the lens array and the collimating lens, plus the horizontal and vertical axes, and correct the error along the z-axis. So, we determined the distance between the central light source and the additional light source to compensate for lens aberrations. From the experimental results, our technique precisely increased the resolution 3 times in both vertical and horizontal dimensions when compared to a traditional point light source display. Our method is applicable to 3D display...

Research paper thumbnail of Enhanced the Depth of Integral Image Display by Using Barrier Array

Research paper thumbnail of Computational integral imaging with structured illumination

Depth sensitivity enhanced computational integral imaging with structured illumination is propose... more Depth sensitivity enhanced computational integral imaging with structured illumination is proposed. Two sets of the elemental images are picked up under structured and normal illumination. Modified computational integral imaging technique is applied to the captured elemental images to reconstruct the depth plane images of the objects. Simulation results show that the proposed system detects the correct depth plane images of the objects effectively. 1.

Research paper thumbnail of Wide-viewing angle integral imaging display using multi layered elemental images

Research paper thumbnail of Thin Point Light Source Display

Research paper thumbnail of Holographic beam shaping for a laser diode

Research paper thumbnail of Three-dimensional see-through augmented-reality display system using a holographic micromirror array

It is difficult to find the micromirror array with desired specifications for augmented-reality d... more It is difficult to find the micromirror array with desired specifications for augmented-reality displays, and the custom fabricating methods are complicated and unstable. We propose a novel, to our knowledge, three-dimensional see-through augmented-reality display system using the holographic micromirror array. Unlike the conventional holographic waveguide-type augmented-reality displays, the proposed system utilizes the holographic micromirror array as an in-coupler, without any additional elements. The holographic micromirror array is fabricated through the simple, effective, and stable method of applying the total internal reflection-based hologram recording using a dual-prism. The optical mirror and microlens array are set as references, and the specifications can be customized. It reconstructs a three-dimensional image from a displayed elemental image set without using any additional device, and the user can observe a three-dimensional virtual image while viewing the real-world...

Research paper thumbnail of Volumetric three-dimensional display using Quantum optics

Today some many types of 3D display are developed but that are not possibly multiviewer, multivie... more Today some many types of 3D display are developed but that are not possibly multiviewer, multiview and full parallax. Our new research work uses the Quantum optic to develop 3D display. Quantum mechanically, we can think of the first photon making a virtual transition to the second state. If the second photon appears within the lifetime of that state, the absorption sequence to the third level can be completed. When the electron, located in the third state, shifts to the first state, that electron emits one visible photon. We controlled the two invisible lights to draw a pixel in volume.

Research paper thumbnail of Depth detection computation integral imaging with Structured illumination

Research paper thumbnail of Integral floating‐image display using two lenses with reduced distortion and enhanced depth

Research paper thumbnail of High-resolution Point Light Source display

There are many 3-D display technologies [1-4]. Among them, the Point Light Source (PLS) display, ... more There are many 3-D display technologies [1-4]. Among them, the Point Light Source (PLS) display, one of the integral imaging [1, 4] technologies has many benefits. Such as, it does not require 3-D glasses and colorful. In addition, it can be seen in both X and Y-axis and regardless of the viewer’s position. However, it has disadvantages such as narrow viewing angles [5-8], short depth range [9, 10] and low resolution because of the large pixel of display [11, 12]. The resolution of PLS display is defined by the distance between two PLSs. Lesser the distance between them more the resolution is enhanced.

Research paper thumbnail of The use of multiple light sources to enhancethe resolution of point light source display

Research paper thumbnail of Point light source display with a large viewing angle using multiple illumination sources

Research paper thumbnail of Point light source display with a large viewing angle using multiple illumination sources

Research paper thumbnail of Viewing Angle Enhanced Point Light Source Display using Additional Light Sources

Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology, 2017

Research paper thumbnail of Advanced 360-Degree Integral-Floating Display Using a Hidden Point Removal Operator and a Hexagonal Lens Array

Journal of the Optical Society of Korea, 2014

ABSTRACT An enhanced 360-degree integral-floating three-dimensional display system using a hexago... more ABSTRACT An enhanced 360-degree integral-floating three-dimensional display system using a hexagonal lens array and a hidden point removal operator is proposed. Only the visible points of the chosen three-dimensional point cloud model are detected by the hidden point removal operator for each rotating step of the anamorphic optics system and elemental image arrays are generated for the detected visible points from the corresponding viewpoint. Each elemental image of the elemental image array is generated by a hexagonal grid, due to being captured through a hexagonal lens array. The hidden point removal operator eliminates the overlap problem of points in front and behind and the hexagonal lens array captures the elemental image arrays with more accurate approximation, so in the end the quality of the displayed image is improved. In an experiment, an anamorphic-optics-system-based 360-degree integral-floating display with improved image quality is demonstrated.

Research paper thumbnail of Hologram Generation of 3D Objects Using Multiple Orthographic View Images

Journal of the Optical Society of Korea, 2008

Research paper thumbnail of Stereoscopic Floating Image System Using Stereoscopic Display and Two Lenses

Journal of the Optical Society of Korea, 2006

Research paper thumbnail of Integral-floating Display with 360 Degree Horizontal Viewing Angle

Journal of the Optical Society of Korea, 2012

Research paper thumbnail of All in focus plane reconstruction based on integral imaging

Proceedings of Spie the International Society For Optical Engineering, Feb 5, 2009

ABSTRACT We propose all-in-focus plane reconstruction based on computational integral imaging rec... more ABSTRACT We propose all-in-focus plane reconstruction based on computational integral imaging reconstruction. The depth of the object is detected by the pixel matching method with proper object mask, and computational integral imaging reconstruction is performed to get all in focus image. The pixel matching detects the depth of the single plane object by evaluating the difference between the collected rays. This pixel matching method can be extended to the multiple plane objects case by the use of the object masking. After each object is identified, the pixel matching is performed to one object by masking other objects. By repeating this process to all objects, the correct depth of the multiple objects can be detected. Computational integral imaging reconstruction is performed to all objects with detected depth values, resulting in all in focus image. From experimental and simulation results, it is confirmed that our proposed method effectively detects the correct depth plane and reconstructs clear all-in-focus image without blur noise.

Research paper thumbnail of Aberration Compensated Point Light Source Display With High-Resolution

Frontiers in Photonics

A high-resolution enhanced point light source integral imaging display is proposed. Using additio... more A high-resolution enhanced point light source integral imaging display is proposed. Using additional light sources to create extra point light sources in the point light source plane, the point light sources appeared on the plane that deviated from the expected values because of aberrations in the lens. Previously, only the lens array aberration was corrected and the distance along the horizontal and vertical axes was corrected too. The objective of this paper is to simultaneously correct the aberration between the lens array and the collimating lens, plus the horizontal and vertical axes, and correct the error along the z-axis. So, we determined the distance between the central light source and the additional light source to compensate for lens aberrations. From the experimental results, our technique precisely increased the resolution 3 times in both vertical and horizontal dimensions when compared to a traditional point light source display. Our method is applicable to 3D display...

Research paper thumbnail of Enhanced the Depth of Integral Image Display by Using Barrier Array

Research paper thumbnail of Computational integral imaging with structured illumination

Depth sensitivity enhanced computational integral imaging with structured illumination is propose... more Depth sensitivity enhanced computational integral imaging with structured illumination is proposed. Two sets of the elemental images are picked up under structured and normal illumination. Modified computational integral imaging technique is applied to the captured elemental images to reconstruct the depth plane images of the objects. Simulation results show that the proposed system detects the correct depth plane images of the objects effectively. 1.

Research paper thumbnail of Wide-viewing angle integral imaging display using multi layered elemental images

Research paper thumbnail of Thin Point Light Source Display

Research paper thumbnail of Holographic beam shaping for a laser diode

Research paper thumbnail of Three-dimensional see-through augmented-reality display system using a holographic micromirror array

It is difficult to find the micromirror array with desired specifications for augmented-reality d... more It is difficult to find the micromirror array with desired specifications for augmented-reality displays, and the custom fabricating methods are complicated and unstable. We propose a novel, to our knowledge, three-dimensional see-through augmented-reality display system using the holographic micromirror array. Unlike the conventional holographic waveguide-type augmented-reality displays, the proposed system utilizes the holographic micromirror array as an in-coupler, without any additional elements. The holographic micromirror array is fabricated through the simple, effective, and stable method of applying the total internal reflection-based hologram recording using a dual-prism. The optical mirror and microlens array are set as references, and the specifications can be customized. It reconstructs a three-dimensional image from a displayed elemental image set without using any additional device, and the user can observe a three-dimensional virtual image while viewing the real-world...

Research paper thumbnail of Volumetric three-dimensional display using Quantum optics

Today some many types of 3D display are developed but that are not possibly multiviewer, multivie... more Today some many types of 3D display are developed but that are not possibly multiviewer, multiview and full parallax. Our new research work uses the Quantum optic to develop 3D display. Quantum mechanically, we can think of the first photon making a virtual transition to the second state. If the second photon appears within the lifetime of that state, the absorption sequence to the third level can be completed. When the electron, located in the third state, shifts to the first state, that electron emits one visible photon. We controlled the two invisible lights to draw a pixel in volume.

Research paper thumbnail of Depth detection computation integral imaging with Structured illumination

Research paper thumbnail of Integral floating‐image display using two lenses with reduced distortion and enhanced depth

Research paper thumbnail of High-resolution Point Light Source display

There are many 3-D display technologies [1-4]. Among them, the Point Light Source (PLS) display, ... more There are many 3-D display technologies [1-4]. Among them, the Point Light Source (PLS) display, one of the integral imaging [1, 4] technologies has many benefits. Such as, it does not require 3-D glasses and colorful. In addition, it can be seen in both X and Y-axis and regardless of the viewer’s position. However, it has disadvantages such as narrow viewing angles [5-8], short depth range [9, 10] and low resolution because of the large pixel of display [11, 12]. The resolution of PLS display is defined by the distance between two PLSs. Lesser the distance between them more the resolution is enhanced.

Research paper thumbnail of The use of multiple light sources to enhancethe resolution of point light source display

Research paper thumbnail of Point light source display with a large viewing angle using multiple illumination sources

Research paper thumbnail of Point light source display with a large viewing angle using multiple illumination sources

Research paper thumbnail of Viewing Angle Enhanced Point Light Source Display using Additional Light Sources

Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology, 2017

Research paper thumbnail of Advanced 360-Degree Integral-Floating Display Using a Hidden Point Removal Operator and a Hexagonal Lens Array

Journal of the Optical Society of Korea, 2014

ABSTRACT An enhanced 360-degree integral-floating three-dimensional display system using a hexago... more ABSTRACT An enhanced 360-degree integral-floating three-dimensional display system using a hexagonal lens array and a hidden point removal operator is proposed. Only the visible points of the chosen three-dimensional point cloud model are detected by the hidden point removal operator for each rotating step of the anamorphic optics system and elemental image arrays are generated for the detected visible points from the corresponding viewpoint. Each elemental image of the elemental image array is generated by a hexagonal grid, due to being captured through a hexagonal lens array. The hidden point removal operator eliminates the overlap problem of points in front and behind and the hexagonal lens array captures the elemental image arrays with more accurate approximation, so in the end the quality of the displayed image is improved. In an experiment, an anamorphic-optics-system-based 360-degree integral-floating display with improved image quality is demonstrated.

Research paper thumbnail of Hologram Generation of 3D Objects Using Multiple Orthographic View Images

Journal of the Optical Society of Korea, 2008

Research paper thumbnail of Stereoscopic Floating Image System Using Stereoscopic Display and Two Lenses

Journal of the Optical Society of Korea, 2006

Research paper thumbnail of Integral-floating Display with 360 Degree Horizontal Viewing Angle

Journal of the Optical Society of Korea, 2012

Research paper thumbnail of All in focus plane reconstruction based on integral imaging

Proceedings of Spie the International Society For Optical Engineering, Feb 5, 2009

ABSTRACT We propose all-in-focus plane reconstruction based on computational integral imaging rec... more ABSTRACT We propose all-in-focus plane reconstruction based on computational integral imaging reconstruction. The depth of the object is detected by the pixel matching method with proper object mask, and computational integral imaging reconstruction is performed to get all in focus image. The pixel matching detects the depth of the single plane object by evaluating the difference between the collected rays. This pixel matching method can be extended to the multiple plane objects case by the use of the object masking. After each object is identified, the pixel matching is performed to one object by masking other objects. By repeating this process to all objects, the correct depth of the multiple objects can be detected. Computational integral imaging reconstruction is performed to all objects with detected depth values, resulting in all in focus image. From experimental and simulation results, it is confirmed that our proposed method effectively detects the correct depth plane and reconstructs clear all-in-focus image without blur noise.