Qiong-Hua Wang

Beihang University

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Dahai Li

Sichuan University

Xiaoqing Xu

Chongqing Vocational Institute of Engineering

Fei Wu

Guangxi University

Luozhi Zhang

Chengdu University of Technology

Jun Wang

Chinese Academy of Sciences

Xin Zhou

Sichuan University

Di Wang

Beihang University

Bai‐Chuan Zhao

Qingdao University of Technology

Guo‐Jiao Lv

Chengdu Technological University

Huan Deng

Johns Hopkins University

Cooperative Institutions

Sichuan University

Chengdu University of Information Technology

Chinese Academy of Sciences

University of Chinese Academy of Sciences

University of Electronic Science and Technology of China

Shanghai Institute of Optics and Fine Mechanics

Chengdu University

Chengdu University of Technology

Chengdu Technological University

Qingdao University of Technology

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Crosstalk-free integral imaging 3D display using pinhole array

Optik (2019)

Fei Wu Guo‐Jiao Lv Bai‐Chuan Zhao Ze‐Sheng Liu Qiong-Hua Wang

Pinhole (optics)

Integral Imaging

Crosstalk

Aperture (computer memory)

Stereo display

10.1016/j.ijleo.2019.03.153

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Citations (8)

Sealing Processes of MgAl2O4-to-Glass for Projection Cathode Ray Tubes

Japanese Journal of Applied Physics (2002)

Qiong-Hua Wang Jianbo Cheng Shin‐Tson Wu

A 5-inch cathode-ray-tube (CRT) faceplate using magnesium-aluminum-oxide (MgAl2O4, abbreviated as MAO) is developed. MAO exhibits a lower thermal expansion coefficient than conventional glass faceplate. To match with MAO, a low temperature frit glass and funnel glass with similar thermal expansion are developed. The stress free process makes the sealing strong and leakage proof. A 50-inch projection CRT high definition television (HDTV) with 1800 lm was demonstrated.

Frit

Cathode ray tube

Glass tube

10.1143/jjap.41.6110

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Citations (0)

A method to achieve color image encryption by using orthogonal compressive sensing and optical scanning holography

Luozhi Zhang Di Wang Nannan Li Qiong-Hua Wang

A method is proposed for color image encryption by using optical scanning holography together with orthogonal compressive sensing, which can provide distinct keys to different channels of color image, along with synchronous encryption. The theoretical demonstration of orthogonal compressive sensing is prioritized to be narrated, which can produce a preprocessed measurement array for the subsequent sampling. The orthogonal basis matrices may provide an additional key space to guarantee the security of this cryptosystem, and the uncertainty of key is used to make a further illustration. The simulations and discussions are also made on the cyphertext characteristics, the robustness of resisting occlusive attack and some other parameters.

Robustness

10.1117/12.2537201

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Citations (0)

Deviation influences on sectional image reconstruction in optical scanning holography using a random-phase pupil

Applied Optics (2012)

Xiu-Ling Wu Xin Zhou Qiong-Hua Wang Yu-Fu Jiang Chunjing Xiao

In this paper, we analyze the influence of two kinds of deviation errors on sectional image reconstruction for an optical scanning holography system using a random-phase pupil. The first deviation occurs in the lateral pixel position while the second occurs in the pixel value of the decoding function. Theoretical analysis and numerical simulation show that these two deviations may lead to noise in the reconstructed image. Additional discussions include the signal-to-noise ratio of the reconstructed image.

Position (finance)

10.1364/ao.52.00a360

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Citations (3)

Accurate retrieval algorithm of amplitude from radial-shearing interferogram

Optics Letters (2010)

Dahai Li Xiaoping Qi Qiong-Hua Wang Xiaoyong Liu Guoying Feng

We propose a mathematic formula that can be applied to work out the amplitude distribution of a tested laser beam from its radial-shearing interferogram accurately, even if the amplitude distribution is extremely uneven. Provided that the background irradiance distribution of a tested beam is extracted from its cyclic radial-shearing (CRS) interferogram first, then using the radial-shearing ratio of the CRS interferometer, the amount of lateral shear along the orthogonal directions and the irradiance ratio, the amplitude distribution of a tested beam can be reconstructed accurately by the proposed formula. The simulation computation and experimental results show that the formula allows any amount of lateral shear to happen, as long as the contracted beam maintains its location inside its corresponding expanded version.

Shearing (physics)

Shearing interferometer

10.1364/ol.35.003054

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Citations (4)

Multiuser computational imaging encryption and authentication with OFDM-assisted key management

Advanced Photonics Nexus (2024)

Hongran Zeng Lu Ping Xiao-Wei Li Lingling Huang Chaoyun Song

Single-pixel imaging (SPI) enables an invisible target to be imaged onto a photosensitive surface without a lens, emerging as a promising way for indirect optical encryption. However, due to its linear and broadcast imaging principles, SPI encryption has been confined to a single-user framework for the long term. We propose a multi-image SPI encryption method and combine it with orthogonal frequency division multiplexing-assisted key management, to achieve a multiuser SPI encryption and authentication framework. Multiple images are first encrypted as a composite intensity sequence containing the plaintexts and authentication information, simultaneously generating different sets of keys for users. Then, the SPI keys for encryption and authentication are asymmetrically isolated into independent frequency carriers and encapsulated into a Malus metasurface, so as to establish an individually private and content-independent channel for each user. Users can receive different plaintexts privately and verify the authenticity, eliminating the broadcast transparency of SPI encryption. The improved linear security is also verified by simulating attacks. By the combination of direct key management and indirect image encryption, our work achieves the encryption and authentication functionality under a multiuser computational imaging framework, facilitating its application in optical communication, imaging, and security.

10.1117/1.apn.3.5.056016

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Citations (1)

Mutated and converged damping factors in lens system optimization to find new local minima

Optik (2013)

Lei Li Xiaoqing Xu Qiong-Hua Wang

Maxima and minima

10.1016/j.ijleo.2012.12.037

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Citations (6)

A tri-view integral imaging three-dimensional display

Optik (2015)

Fei Wu Qiong-Hua Wang Guo‐Jiao Lv Huan Deng Bai‐Chuan Zhao

Integral Imaging

Stereo display

10.1016/j.ijleo.2015.07.183

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Citations (0)

Multiple-image encryption based on optical scanning holography using orthogonal compressive sensing and random phase mask

Optical Engineering (2020)

Luozhi Zhang Xin Zhou Di Wang Nannan Li Xing Bai

A method is proposed for multiple-image encryption based on optical scanning holography (OSH) using a random phase mask (RPM) and orthogonal compressive sensing (CS). It can destroy the linearity of the traditional OSH system and possess a superior security. On the one hand, images are preferentially preprocessed by utilizing the orthogonal CS to provide a single-layer section for OSH. Therefore, the defocus noise as well as information leakage can be controlled effectively in decryption. On the other hand, each image can be extracted separately without the others' contents. In addition, the use of RPM can bring about a more ulterior distribution to the cyphertext, which may be better than the case without the RPM. The use of orthogonal modulation matrices and RPM can provide the additional key spaces to guarantee the security of this holography cryptosystem. Simulations and discussions are also made on the cyphertext characteristics as well as the ability of resisting occlusive attack.

Digital holography

10.1117/1.oe.59.10.102411

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Citations (14)

Ultra-wide viewing angle holographic display system based on spherical diffraction

Displays (2024)

Jun Wang Mohan Wang Yang Wu Jie Zhou Chun Chen

Viewing angle

Holographic display

Information display

10.1016/j.displa.2024.102839

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Citations (1)