中国科学院机构知识库网格系统: 检索

High-speed focusing and scanning light through multimode fiber 会议论文 OAI收割
Shanghai, China, 2020-10-17
作者: Geng, Yi; Zhang, Zaikun; He, Zhengquan; Chen, Hui; Wang, Ruiduo

|

收藏 | 浏览/下载：32/0 | 提交时间：2021/01/20

Light focusing amplitude-only modulation multimode fiber spot-scanning imaging

High-speed light focusing through multimode fiber for spot-scanning imaging 会议论文 OAI收割
Xi'an, China, 2019-08-06
作者: Chen, Hui; Geng, Yi; Xu, Chengfang; Zhuang, Bin

|

收藏 | 浏览/下载：90/0 | 提交时间：2020/03/04

Light focusing phase-only modulation multimode fiber spot-scanning imaging

Deep Subwavelength-Scale Light Focusing and Confinement in Nanohole-Structured Mesoscale Dielectric Spheres 期刊论文 OAI收割
Nanomaterials, 2019, 卷号: 9, 期号: 2, 页码: 7
作者: Y.H.Cao; Z.Y.Liu; O.V.Minin; I.V.Minin

|

收藏 | 浏览/下载：26/0 | 提交时间：2020/08/24

nanohole,microsphere,subwavelength-scale light focusing,photonic nanojets,nanoparticles

Calibration of focusing lens artifacts in a dual rotating-compensator Mueller matrix ellipsometer 期刊论文 OAI收割
APPLIED OPTICS, 2018, 卷号: 57, 期号: 15, 页码: 4145-4152
作者: Fan, Zhentao; Tang, Yuanyuan; Wei, Kai; Zhang, Yudong

|

收藏 | 浏览/下载：37/0 | 提交时间：2019/08/23

Calibration Ellipsometry Focusing Light measurement Matrix algebra

Efficient auto-refocusing for light field camera 期刊论文 OAI收割
Pattern Recognition, 2018, 期号: 81, 页码: 176-189
作者: Chi Zhang; Guangqi Hou; Zhaoxiang Zhang; Zhenan Sun; Tieniu Tan

|

收藏 | 浏览/下载：38/0 | 提交时间：2018/08/07

Auto-refocusing Detection-based Focusing Blurriness Measure Light-field Photography

Design of swing type switching mechanism for focusing lens group in visible light television system with double focal lengths 期刊论文 OAI收割
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument, 2018, 卷号: 39, 期号: 1, 页码: 84-91
作者: Xu, Xinhang; Zhang, Fei; Xia, Wenbo

|

收藏 | 浏览/下载：18/0 | 提交时间：2019/09/17

Light Focusing Lenses Mechanisms Optical systems Specifications Stepping motors Switching Television systems

KW-output high beam quality diode laser array source (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Zhang J.; Wang L.; Wang L.; Wang L.; Liu Y.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

With the advantages of small volume light weight high efficiency and long lifespan diode laser has been widely applied to industrial processing. Presently for laser used as processing light source needs to amount to dozens of KW per cm2 of power density how to increase power output and get smaller light spot for diode laser becomes a key problem. It is introduced that by designing beam shaping by ourselves and making use of optical system for beam blooming and focusing 808nm laser array composed of 20 bars eventually achieves the 1001.5w power output coupling efficiency at 90% 11mm2 of light spot through experiments which enables diode laser to be directly applied to cladding welding and so on. 2012 IEEE.

Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者: Wang S.-R.; Lin G.-Y.; Yu L.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system a deuterium lamp a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.

Analysis of a diffractive microlens using the finite-difference time-domain method (EI CONFERENCE) 会议论文 OAI收割
作者: Liu Y.; Liu H.; Liu H.; Liu H.; Liu Y.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

The finite-difference time-domain (FDTD) method is used as rigorous electromagnetic analysis model to calculate the field for a diffractive microlens (DML). The FDTD is used for the entire solution rather than using a near- to far-field propagation method to obtain the far-field energy distribution thus all the results are vector based. We derived a formula to calculate the magnitude of electric field which is time dependent and can be used to graphically show the light wave propagation and focusing process through a DML. Both the comparison and the integral methods are presented to obtain wave amplitude in full solution space and the distribution of light energy behind a DML is illustrated based on the wave amplitude. The formula of diffractive efficiency of the DML is derived from a time-averaged Ponyting vector which can indicate the propagation direction of light energy. Application of these formulations in the analysis of a DML example demonstrates the high accuracy and efficiency of our method. 2010 Society of Photo-Optical Instrumentation Engineers.

Near-field visualization of focal depth modulation by step corrugated plasmonic slits 期刊论文 OAI收割
APPLIED PHYSICS LETTERS, 2009, 卷号: 94, 期号: 15
作者: Jia, Baohua; Shi, Haofei; Li, Jiafang; Fu, Yongqi; Du, Chunlei

收藏 | 浏览/下载：24/0 | 提交时间：2015/09/21

integrated optics lenses light propagation optical design techniques optical fabrication optical focusing optical modulation plasmonics