中国科学院机构知识库网格系统: 检索

Compact lensless optoelectronic convolutional neural network for image classification 会议论文 OAI收割
Xi'an, China, 2023-08-07
作者: Zhang, Zaikun; Da, Zhengshang; Kong, Depeng; Wang, Ruiduo; Mu, Qiyuan

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收藏 | 浏览/下载：22/0 | 提交时间：2024/01/09

free-space optical neural network lensless convolution processor optoelectronic convolutional neural network image classification diffractive phase mask

Image clarity of membrane diffractive imaging system using total-scale Retinex 会议论文 OAI收割
Beijing, China, July 7, 2019 - July 9, 2019
作者: Xu, Xinggui; Yang, Ping; Wen, Lianghua; Liu, Yong; Xian, Hao

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收藏 | 浏览/下载：31/0 | 提交时间：2021/05/06

Membrane diffractive imaging Image enhancement Retinex Imaging through turbulent media

Stray light characteristics of the diffractive telescope system 期刊论文 OAI收割
Optical Engineering, 2018, 卷号: 57, 期号: 2, 页码: 025105
作者: Liu, Dun; Wang, Lihua; Yang, Wei; Wu, Shibin; Fan, Bin

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收藏 | 浏览/下载：38/0 | 提交时间：2019/08/23

Charge coupled devices Density (optical) Diffraction Diffractive optical elements Glare Image enhancement Light sources Optical systems Space telescopes Stars

Optical design of diffractive telescope system based on off-axis three mirror 会议论文 OAI收割
Chengdu, PEOPLES R CHINAChengdu, PEOPLES R CHINA, JUN 26-29, 2018JUN 26-29, 2018
作者: He, Chuanwang; Huang, Peng

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收藏 | 浏览/下载：33/0 | 提交时间：2019/08/23

Diffractive telescope Off-axis three mirror Schupmann Optical design Image analysis

Accurate Hologram Generation Using Layer-Based Method and Iterative Fourier Transform Algorithm 期刊论文 OAI收割
IEEE Photonics Journal, 2017, 卷号: 9, 期号: 1, 页码: 7765127
作者: Pang, Hui; Wang, Jiazhou; Cao, Axiu; Zhang, Man; Shi, Lifang

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收藏 | 浏览/下载：44/0 | 提交时间：2018/11/20

Computer generated holography - Diffractive optics - Electron holography - Holographic displays - Holography - Image processing - Image reconstruction - Iterative methods - Lithography - Noise pollution - Speckle - Spectrum analysis

High-accuracy method for holographic image projection with suppressed speckle noise 期刊论文 OAI收割
Optics Express, 2016, 卷号: 24, 期号: 20, 页码: 22766-22776
作者: Pang, Hui; Wang, Jiazhou; Cao, Axiu; Deng, Qiling

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收藏 | 浏览/下载：27/0 | 提交时间：2018/06/14

Diffractive Optics Holograms Holography Image Reconstruction Iterative Methods Optical Projectors Speckle

Design of tracking and detecting lens system by diffractive optical method 期刊论文 OAI收割
Proceedings of SPIE: Advanced Optical Design and Manufacturing Technology and Astronomical Telescopes and Instrumentation, 2016, 卷号: 10154, 页码: 101541H
作者: Yang, Jiang; Qi, Bo; Ren, Ge; Zhou, Jianwei

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收藏 | 浏览/下载：62/0 | 提交时间：2018/06/14

Diffractive Optics Feature Extraction Image Resolution Imaging Systems Lenses Manufacture Optical Design Optical Instrument Lenses Optical Systems Radio Telescopes Target Tracking Telescopes

Self-calibrating phase measurement based on diffraction theory and numerical simulation experiments 期刊论文 OAI收割
OPTICAL ENGINEERING, 2015, 卷号: 54, 期号: 2
作者: Zhou, Liao; Qi, Qiu; Hao, Xian

收藏 | 浏览/下载：31/0 | 提交时间：2015/07/10

segmented mirror piston error diffractive image numerical simulation

Design of reimaging F/1.0 long-wavelength infrared optical system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

A reimaging F/1.0 long-wavelength infrared optical system is proposed. The design has a flexible opto-mechanical layout. The design process is as follows. Firstly the catadioptric reimaging system consists of two reflecting mirrors and a relay lenses. Two reflecting mirrors make up of the first imaging system and are therefore free of chromatic aberrations while low dispersion lenses were used in the reimaging system so the optical system do not need achromatic design for a high image quality. Then to correct high-order aberrations resulting from large relative aperture more parameters need to be used with aspheric or diffractive surfaces due to modern optic technology development. Here aspheric is selected for easily manufacture. Finally the design is completed with the help of ZEMAX software. The effective focal length of the objective is 120mm and the field of view (FOV) is 4. The simulated final design shows adequate image quality and the modulation transfer function (MTF) is close to diffraction limit. The effect of the surrounding environmental temperature is analyzed using the concept of thermal defocusing and the thermal compensation is discussed. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Athermal design of hybrid refractive/harmonic diffractive optical system for far-infrared multi-band (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Liu Y.; Liu Y.; Zhang H.; Zhang H.; Sun Q.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

In order to get enough information about the target avoid big chromatic aberration as a result of wide spectrum and the complexity of optical system and adapt different special environment temperature a hybrid refractive/harmonic diffractive optical system in far-infrared multi-band is described in the paper. This diffractive optical system has been designed an athermalized multi-band imaging system with harmonic diffractive element in 15-50m spectrum based on larger 1dispersion capability and particular thermal dispersive power of harmonic diffractive element. Then at the temperature range from 0C to 40C this design can simultaneously meet with all requirements of the imaging system in five harmonic wave bands including15.8-16.2m 18.5-20m 23-25m 30.5-33.5m and 46-50m. In each harmonic wave band the magnification changes as a function of wavelength which creates image registration error. To compensate this shortcoming a zoom optical system is designed with three lenses by means of optical two- component method. The design results show that the hybrid refractive/harmonic diffractive optical system can realize athermalized and achromatic design and the zoom optical system makes half image height at 3.53mm in every harmonic wave band and still realizes aberration compensation action. In the five harmonic wave bands each optical transfer function approaches the diffraction limit at ambient temperature range of 0C to 40C. Finally the system realizes the requirements of portability mini-type and ease for fabrication. 2009 SPIE.