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An all-silicone zoom lens in an optical imaging system

Chinese Physics B 2013年第9期22卷 465-469页

作者：赵存华 College of Physics and Electronic Information Luoyang Normal University Luoyang Key Laboratory of Laser Spectrum Technology Institute of Modern Optics Luoyang Normal University

An all-silicone zoom lens is fabricated. A tunable metal ringer is fettered around the side edge of the lens. A nylon rope linking a motor is tied, encircling the notch in the metal ringer. While the motor is operating, the rope can shrink or release to change the focal length of the lens. A calculation method is developed to obtain the focal length and the zoom ratio. The testing is carried out in succession. The testing values are compared with the calculated ones, and they tally with each other well. Finally, the imaging performance of the all-silicone lens is demonstrated. The all-silicone lens has potential uses in cellphone cameras, notebook cameras, micro monitor lenses, etc.

关键词： micro lens silicone lens zoom optical system

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A new approach for detecting sudden hypotension in hemodialysis by using dual-channel optical system

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Journal of Innovative optical Health Sciences 2017年第1期10卷 59-67页

作者： Younessi Heravi Mohamad Amin Golmakani Ebrahim Joharinia Sima Department of Basic Sciences North Khorasan University of Medical SciencesBoinurdIran Department of Anesthesiology and Critical Care Mashhad University of Medical Sciences MashhadIran Department of Electrical Engineering Young Researchers and Elite Club Bojnourd Branch Islamic Azad UniversityBojnourdIran

Dialysis hypotension is one of the most prevalence symptoms of dialysis and occurs in 40%of treatment sessions.Detection and prediction of hypotension is important for the well-being of the patient and for optimizing treatment.The aim of this study was to construct optical system to monitor blood pressure(BP)continuously and without cuff in hemodialysis based on pulse transit time(PTT)method.To measure the BP changes,dual channel optical system were developed.In this study,individuals were classified into two groups of normal and hemodialysis.In both groups,BP and consequently PTT were earned three times in different positions.After the initial calibration,the regression equation was drawn for each subject.In normal group,each subject was placed in the supine position and BP was measured both by designed system and sphyg-momanometer cuff.During BP measurements,in addition to BP,blood pressure decline was also monitored by optical system.For hemodialysis group,the same measurement setup was adopted.In both groups,the error between cuff method and PTT was calculated.Correlation coefficients for BPcuf vs BP pTT were calculated and Bland-Altman plot was performed for the normal and hemodialysis groups.In this study 16 subjects participated.The results for normal group showed that maximum difference between cuff method and the present method was 14 mmHg and for.dialysis group was 16 mmHg.Bland-A ltman plot in normal group revealed limits of agreement from-13.98 to 13.18 mmHg.Considering hemodialysis group,limits of agreement were from-15.94 to 13.88 mmHg.The correlation coefficient was 0.74 for normal group and was 0.72 for hemodialysis group.The proposed system can monitor BP continuously and diagnose sudden hypotension.So it can be recommended as a useful method to indicate hypotension and can be used for dialysis unit.

关键词： Blood pressure monitoring optical system hypotension hemodialysis.

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Design of optical system for Small Long-Life Star Sensor

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Aerospace China 2021年第3期22卷 32-41页

作者： ZHAO Chongyi QIAN Xuemin ZHOU Xiaojun Anhui Institute of Optics and Fine Mechanics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031 School of Astronautics Harbin Institute of TechnologyHarbin 150001 Key Laboratory of Spectral Imaging Technology Xi’an Institute of Optics and Precision MechanicsChinese Academy of ScienceXi’an 710119

In order to realize a high-precision and continuous working function of a star sensor,we propose a new optical system design.Considering the difficulty of the manufacturing process,the entire optical system uses a complicated Petzval structure.In this paper,the key design elements of the optical system applied for star sensors are presented and the most important performance parameters are given.The ground test results show that the system can maintain excellent detection performance on a near-surface atmospheric platform.This study provides an optical system design scheme for a high-precision and continuous operating star sensor,as well as the theoretical basis for future in-atmosphere and continuous star detection technology.

关键词： star sensor optical system design Petzval structure

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Design of a Multimodal Light Sheet optical system for Multivariate Applications in Phytopathology

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Optics and Photonics Journal 2021年第5期11卷 110-120页

作者： Mama Sangare Mathieu Hebert Anthony Cazier Pierre Chavel Institut des Sciences Appliquées Université des Sciences Techniques et Technologies de Bamako (USTTB) Bamako Mali Laboratoire Hubert Curien Institut d’Optique Graduate School Université Jean Monnet de Saint-Etienne Université de Lyon CNRS Saint-Etienne France

The design of optical instruments is an active subject due to improvement in lens techniques, fabrication technology, and data handling capacity. Much remains to do to expand its application to phytopathology, which would be in particular quite useful to improve crop growth monitoring in countries like Mali. An optical multimodal system for plant samples has been developed to improve the characterization of leaf disease symptoms, provide information on their effects, and avoid their spread. Potentially inexpensive components (laser, lens, turntables camera and sample, filter, lens, camera and computer) have been selected, assembled and aligned on an optical table into a multimodal system operating in transmission, reflection, diffusion and fluorescence. The illumination and observation angles can be adjusted to optimize viewing conditions in the four modes. This scientific contribution has been an initiation into the design and implementation of an optical instrument. Initial results are shown and will now be extended in cooperation with agronomic laboratories in African countries for tests on specific plant diseases in relation with prevailing climate conditions.

关键词： Design optical system Light Sheet Multimodal Multivariate Phytopathology

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Study of ghost image suppression in polarized catadioptric virtual reality optical systems

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Virtual Reality & Intelligent Hardware 2020年第1期2卷 70-78页

作者： Xu PENG Zhenyu GAO Yitong DING Dongfeng ZHAO Xiaoyu CHI School of Instrumentation and Optoelectronic Engineering Qingdao Research Institute of Beihang UniversityQingdao 266100China Goertek Co. Ltd.Qingdao 266100China

Backgrounds This paper introduces a polarized catadioptric virtual reality optical system.With a focus on the issue of serious ghost image in the system,root causes are analyzed based on design principles and optical structure.Methods The distribution of stray light is simulated using Lighttools,and three major ghost paths are selected using the area of the diffuse spot,S d and the energy ratio of the stray light,K as evaluation means.A method to restrain the ghost image through optimization of the structure of the optical system by controlling the focal power of the ghost image path is proposed.Results/Conclusions The results show that the S_(d) for the ghost image path increases by 40%and K decreases by 40%after optimization.Ghost image is effectively suppressed,which provides the theoretical basis and technical support for ghost suppression in a virtual reality optical system.

关键词： Virtual Reality optical system Ghost Focal power optical Design

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The Laser Doppler Shift Method for Measuring Slider Flying Characteristics

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The Journal of China Universities of Posts and Telecommunications 1998年第1期5卷 57-60页

作者： Liu Qing (Department of Telecommunication Engineering, Xi′an Institute of Posts and Telecommunications, Xi′an 710061, P. R. China) He Yan (The Fourth Research Institute of MPT, Xi′an 710061, P. R. China)

The basic principle ,optical system and measured results of the laser Doppler shift method for measuring slider flying characteristics are presented in this paper.

关键词： magnetic head slider laser Doppler ,frequency shift optical system

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Compensation for first-order polarization-mode dispersion by using a novel tunable compensator

Compensation for first-order polarization-mode dispersion by...

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Asia-pacific optical Communications 2004

作者： Feng Qiu* Tigang Ning ShanShan Pei Yujun Xing Shuisheng Jian Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

Polarization-related impairments have become a critical issue for high-data-rate optical systems, particularly when considering polarization-mode dispersion (PMD). Consequently, compensation of PMD, e

关键词： optical polarization-mode dispersion（PMD） compensation optical system

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