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Phase-only hologram generation based on integral imaging and its enhancement in depth resolution

Chinese Optics Letters 2011年第12期9卷 31-34页

作者： Jiwoon Yeom Jisoo hong Jae-Hyun Jung keehoon hong Jae-Hyeung Park Byoungho Lee School of Electrical Engineering Seoul National University School of Information and Communication Engineering Chungbuk National University

We introduce a phase-only hologram generation method based on an integral imaging, and propose an enhancement method in representable depth interval. The computational integral imaging reconstruction method is modified based on optical flow to obtain depth-slice images for the focused objects only. A phaseonly hologram for＇ multiple plane images is generated using the iterative Fresnel transform algorithm. In addition, a division method in hologram plane is proposed for enhancement in the representable minimum depth interval.

关键词： CIIR Phase-only hologram generation based on integral imaging and its enhancement in depth resolution PSNR

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Real-time noise-free inline self-interference incoherent digital holography with temporal geometric phase multiplexing

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Photonics Research 2023年第6期11卷 906-916页

作者： KIhong CHOI JAE-WON LEE JUNGYEOP SHIN keehoon hong JOONGKI PARK HAK-RIN KIM Digital Holography Research Section Electronics and Telecommunications Research InstituteDaejeon 34129Republic of Korea School of Electronic and Electrical Engineering Kyungpook National UniversityDaegu 41566Republic of Korea School of Electronics Engineering Kyungpook National UniversityDaegu 41566Republic of Korea

In this paper,we propose a real-time incoherent digital holographic(IDH)recording system free from bias and twin-image noises.A motionless three-step polarization-encoded phase-shifter operating at 99 Hz is realized with two electrically controllable birefringence-mode liquid crystal cells operating in tandem with a geometric phase lens and *** on the proposed optical configuration,a coaxial straight-line self-interference IDH recording system is ***,the elimination of bias and twin-image noise from three phase-shifted images is demonstrated as a proof of ***,complex-valued holographic video acquisitions with a resolution greater than 20 megapixels are demonstrated,with an effective acquisition frequency of33 Hz.

关键词： holographic phase geometric

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Acceleration method for computer generated spherical hologram calculation of real objects using graphics processing unit(Invited Paper)

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Chinese Optics Letters 2014年第6期12卷 71-75页

作者： Gang Li keehoon hong Jiwoon Yeom Ni Chen Jae-Hyeung Park Nam Kim Byoungho Lee School of Electrical Engineering Seoul National University Gwanak-Gu Gwanakro 1 Seoul 151-744 South Korea School of Information and Communication Engineering Inha University100 Inha-ro Nam-gu Incheon 402-751 South Korea School of Information and Communication Engineering Chungbuk National University52 Naesudong-ro Heungduk-gu Cheongju 361-763 South Korea

Graphics processing unit （GPU） based fast calculation method for computer generated spherical hologram （CGSH） of a real-existing object is proposed. Three-dimensional （3D） point cloud is constructed by capturing a real-existing object from multiple directions using a depth camera. The GPU based calculation is used in both hologram generation part and numerical reconstruction part of the CGSH. The improved calculation efficiency is verified by comparing the computation speed between central processing unit （CPU） based and GPU based imDlementation.

关键词： GPU CPU real

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