Contents
2013
Volume: 35 Issue 1
19 Article(s)
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Research Article
Application of electronic speckle pattern interferometry in heating shell measurements and system′s optimization
LI Gang, LI Li, ZHANG Chu, and HUANG Jingxia
To precisely measure the heating metallic deformation, an experimental platform based on the principle of laser electronic speckle pattern interferometry(LESPI)was proposed. After image processing, the three-dimensional displacement of deformation was obtained. To optimization the results, the laser was disposed and thTo precisely measure the heating metallic deformation, an experimental platform based on the principle of laser electronic speckle pattern interferometry(LESPI)was proposed. After image processing, the three-dimensional displacement of deformation was obtained. To optimization the results, the laser was disposed and the effects of measurement with different roughness objects were contrasted. The results showed that better specklegram will be obtained with laser after pinhole filter and objects with higher roughness. The research provides experiment method for the metallic deformation measurement and reference to improve measure accuracy..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 1 (2013)
High accuracy phase error compensation for digital fringe projection profilometry
CHU Liwen, ZHANG Xu, and ZHU Limin
The Gamma (γ) distortion caused by digital video projector contributes most for phase error in digital fringe projection profilometry. The residue phase error is still non-negligible after γ correction and phase error compensation based on single γ value. By analyzing the non-uniform distribution of γ, a novel phase erThe Gamma (γ) distortion caused by digital video projector contributes most for phase error in digital fringe projection profilometry. The residue phase error is still non-negligible after γ correction and phase error compensation based on single γ value. By analyzing the non-uniform distribution of γ, a novel phase error compensation technique, which dynamically constructs the phase error look-up-table (LUT) regarding to the γ value of the specific pixel, is introduced and it effectively improves the accuracy of phase error compensation. The measured results are analyzed and compared and it shows that higher accuracy could be achieved with this method..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 6 (2013)
Schmidt prism polarization properties of the Mueller matrix method for analyzing and measuring
LU Jinjun, and ZHU Weibing
The polarization aberration of the Schmidt prism resulted in the decline in the quality of imaging, as a result, the quantitative detection of the Schmidt prism to correct the polarization aberration has become a top priority. Mueller matrix method can be used not only for the analysis of the polarization properties ofThe polarization aberration of the Schmidt prism resulted in the decline in the quality of imaging, as a result, the quantitative detection of the Schmidt prism to correct the polarization aberration has become a top priority. Mueller matrix method can be used not only for the analysis of the polarization properties of the Schmidt prism, but also as the characterization and detected object of the Schmidt prism′s polarization properties. Dual rotating retarder configuration is applied, whose incident is modulated by synchronously rotating two quarter waveplates. And Schmidt prism′s matrix elements are calculated by Fourier series. According to the calculation and analysis and experiment of the Mueller matrix element, the obtained retardance and diattenuation in the two different ways are obviously different from each other. The diattenuation and retardance have been employed to characterize the polarization aberration of the Schmidt prism, and they are from the Mueller matrix directly. Obviously, Mueller matrix method is intuitive and convenient both in theory analysis and experiment..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 12 (2013)
An improved image fusion algorithm based on wavelet of edge detection
LI Qian, GUO Jia, and GUO Xiaoyun
The theory of pixel level image fusion method based on simple method, pyramid decomposition and wavelet decomposition is described in this paper. In addition, based on the existing infrared and visible image fusion method, an improved image fusion algorithm based on wavelet of edge detection has been presented. The fusThe theory of pixel level image fusion method based on simple method, pyramid decomposition and wavelet decomposition is described in this paper. In addition, based on the existing infrared and visible image fusion method, an improved image fusion algorithm based on wavelet of edge detection has been presented. The fusion effect was evaluated. The experimental result shows that the infrared and visible image fusion with this method can provide more effective information to improve the image resolution effect and the detecting and recognition probability of the human eye to scenes of target. The fusion results are ideal..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 18 (2013)
Approximation of trigonometric function and its application in optical fringe analysis
ZHOU Jun, and GUO Hongwei
Trigonometric and inverse trigonometric functions, as the basic elementary functions, are widely used in optical measurement. In some cases, however, it is necessary to calculate their approximations in order to meet the need in hardware calculation or fast calculation. For this purpose, a method is presented in which Trigonometric and inverse trigonometric functions, as the basic elementary functions, are widely used in optical measurement. In some cases, however, it is necessary to calculate their approximations in order to meet the need in hardware calculation or fast calculation. For this purpose, a method is presented in which the best approximation polynomial for a trigonometric or inverse trigonometric function, in a certain interval, is deduced based on the ∞-norm, and then the sectional approximation polynomials are obtained by use of trigonometric equations so that the values of the function in its whole domain of definition can be calculated. The coefficients and accuracies of the approximation polynomials for some typical trigonometric and inverse trigonometric functions are also provided. These results are used in optical fringe analysis, thus experimentally demonstrating the validity of the presented approach..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 22 (2013)
Surface plasmon resonance biochemical analysis instrument and its application in the samples concentration detection
FU Yunliang, and LIN Hong
Surface plasmon resonance (SPR) is a phenomenon which occurs when light is reflected off thin metal films, and the intensity of reflected light is correlated with the optical wavelength of incidence, angle of incidence, and refractive index of the material on the surface of Au film. Biochemical analysis instruments basSurface plasmon resonance (SPR) is a phenomenon which occurs when light is reflected off thin metal films, and the intensity of reflected light is correlated with the optical wavelength of incidence, angle of incidence, and refractive index of the material on the surface of Au film. Biochemical analysis instruments based on surface plasmon resonance have been developed for characterizing and quantifying biomolecular interaction. The working principle, technical parameters and testing method of the HPSPR-6000 were discussed here. The SPR response of immobilizating sulfamethazine antign on the surface of chip was tested and the binding value between antign and antibody on the surface chip was measured..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 30 (2013)
Research and implementation of the bluetooth development on Android system
ZHOU Jinbo, ZHANG Lei, ZHANG Min, and YUAN Qinpeng
Bluetooth is widly applied in electronic devices. As a short-range wireless communication technology, it is able to connect different devices, not having to rely on transmission line. However, the research on the bluetooth programming based on the Android system is scant. As a result, the Bluetooth protocol stack of thBluetooth is widly applied in electronic devices. As a short-range wireless communication technology, it is able to connect different devices, not having to rely on transmission line. However, the research on the bluetooth programming based on the Android system is scant. As a result, the Bluetooth protocol stack of the Android system is briefly introduced, and the Bluetooth development process is analyzed. Then, the bluetooth communication between the android system and the single-chip microcomputer is implemented to control the operation of stepper motor. The practical application shows that the system can send and receive data with bluetooth precisely, with high control accuracy, stability and fast response time..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 34 (2013)
The research of audio monitoring and audio source location using semiconductor laser
PAN Lina, ZHUANG Ziyun, WANG Ge, and ZHANG Xuedian
With the development of laser technology, laser can be applied to various fields. With the aim of studying laser application in monitoring, a set of audio monitoring and positioning system was designed and produced using photoelectric detection principle. The system will be placed in outdoor about 10 meters far away frWith the development of laser technology, laser can be applied to various fields. With the aim of studying laser application in monitoring, a set of audio monitoring and positioning system was designed and produced using photoelectric detection principle. The system will be placed in outdoor about 10 meters far away from the goal, two parallel lasers will be lased to the window. And the reflection of the light spot will be detected by system composed of two sensors. As the spread of indoor sound meets glass, the glass will cause tiny mechanical vibration, making the light spot in the silicon photocell occur tiny displacement. Through the acquisition of the photocurrent signal change, the indoor sound signal content will be reduced to the monitor. The result of the experiment was satisfactory..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 37 (2013)
A brief discussion on confocal microscopy techniques
CHEN Muwang
Confocal microscopy boasts such advantages as high contrast, high resolution and easy to 3D reconstruction. Therefore, the device has been widely applied in the manufacture and detection of biology and medical research, micro-machining, semiconductor and macromolecule. There are several kinds of confocal microscopy, inConfocal microscopy boasts such advantages as high contrast, high resolution and easy to 3D reconstruction. Therefore, the device has been widely applied in the manufacture and detection of biology and medical research, micro-machining, semiconductor and macromolecule. There are several kinds of confocal microscopy, including laser scanning confocal microscopy(LSCM), spinning-disk confocal microscopy (SDCM) and structured illumination microscopy (SIM). LSCM has such advantages as high contrast and resolution, but it is complicated, bulky, expensive and slow in imaging. SDCM can get the confocal image fast based on the lower resolution and more complicated technique. Though SIM is the simplest and cheapest confocal microscopy, it can offer high quality image with fast speed..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 44 (2013)
Simulation of aberration′s shearing interference pattern
LI Li, LI Gang, QI Xiaohui, LIU Bingqi, and XU Chunmei
To judge the aberration of optical system, a simulation of the shearing interference pattern of the aberration′s was presented. The relationship of aberration and interferogram was constituted, which is based on the aberration theory and shearing interferometry. Interference patterns of primary aberrations and secondarTo judge the aberration of optical system, a simulation of the shearing interference pattern of the aberration′s was presented. The relationship of aberration and interferogram was constituted, which is based on the aberration theory and shearing interferometry. Interference patterns of primary aberrations and secondary aberrations were simulated. The simulaton results showed that any primary or secondary aberration has its characteristic interference pattern, which can be used to judge the aberration. These results can provide evidence for judging which kinds of optical aberrations the optical systems have..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 48 (2013)
Design and analysis of kinematic supporting project for spatial optical remote sensor
LI Bingqiang, HE Xin, and YUAN Tao
A kinematic supporting project had been designed in order to resolve installation and high precision positioning for spatial optical remote sensor. First, constraint-screw theory was introduced, including the concept of screw, modified K-G equation and physical meaning of communal constraint and redundant constraint. SA kinematic supporting project had been designed in order to resolve installation and high precision positioning for spatial optical remote sensor. First, constraint-screw theory was introduced, including the concept of screw, modified K-G equation and physical meaning of communal constraint and redundant constraint. Second, a mode of 3-RRR spatial parallel mechanism was proposed as kinematic support scheme. Constraint-screw algorithm was applied to analyze the problem how per embranchment circumscribed working platform′s degree of freedom at ideal state, and all embranchments acted on the working platform together that gave birth to communal constraint and redundant constraint. After that, the clearances of kinematic pairs in unit of micrometer were inducted to investigate the assignment of degree of freedom at actual circumstance, the quantity of over-constraint at idea state was compared with the situation at actual state including clearances. Finally, Euler equation was adopted to optimize components′ configuration while the design of supporting project was completed. Experimental results indicate that the value of remote sensor′s displacement along every axis is in unit of 0.01 mm, and its rotation angle around x, y, z axis is 3.95″, 1.86″, 1.81″. This supporting project satisfies the request for support and high precision positioning for spatial optical remote sensor..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 54 (2013)
Research on the modeling and simulation techniques of digital all-fiber current transformer
SONG Man, and ZHANG Hui
A small suitable digital all-optical current measurement system is studied which is presented under the principle of the optic-fiber current sensors, is used by the advantage of the strong anti-interference ability and the complete electrical isolation, aimed to solve the actual technical problems of the existing powerA small suitable digital all-optical current measurement system is studied which is presented under the principle of the optic-fiber current sensors, is used by the advantage of the strong anti-interference ability and the complete electrical isolation, aimed to solve the actual technical problems of the existing power system high voltage side current detection system, such as the strong electromagnetic interference, the complicated insulation system and the high cost of the maintenance and so on. This paper will improve the traditional electromagnetic current transformer in the power system. It used polarization maintaining fiber to inhibit the inherent linear birefringence in the fiber effectively, used Jones matrix to analysis of the fiber-optic system and used MATLAB simulation software to simulate the system. The theoretical analysis and system simulation have verified that the digital all-fiber current transformer measured current and the actual current is consistent. Shows that the system established mathematical model and simulation model is correct and feasible..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 60 (2013)
The image processing system design of spherical interferometer based on MATLAB
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A kind of non-contact online spherical interferometer has been designed and developed with Twyman-Green interferometry principle in the laboratory. The CCD camera lens in this interferometer can produce relatively high resolution image of the interence fringe. This paper mainly focuses on the basic method for using MATA kind of non-contact online spherical interferometer has been designed and developed with Twyman-Green interferometry principle in the laboratory. The CCD camera lens in this interferometer can produce relatively high resolution image of the interence fringe. This paper mainly focuses on the basic method for using MATLAB image processing software to digitize the interference fringe, and through the pretreatment of this interference fringe and the extraction of the skeleton, finally the wavefont function of the detected spherical surface was fitted by adopting the Zernike polynomial;through the MATLAB programming, the automated processing of the detection signal of this spherical interferometer was realised..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 65 (2013)
A design of communication processor module based on Modbus/TCP protocol
LI Huiyan, FEI Peng, and SHEN Yuming
To realize the functions of communications processor module, an embedded TCP/IP protocol stack was proposed based on the uC/OS-II real-time operating system and the hardware platform of ARM7 kernel, which can support multi-threaded real time application by transplanting the LwIP to ARM development platform. On the commTo realize the functions of communications processor module, an embedded TCP/IP protocol stack was proposed based on the uC/OS-II real-time operating system and the hardware platform of ARM7 kernel, which can support multi-threaded real time application by transplanting the LwIP to ARM development platform. On the communication application layer, the Modbus frames was embedded to the TCP frames, and the Modbus/TCP protocol communication structure model was analyzed, in order to ultimately achieve the embedded Modbus/TCP communication protocol simply and reliably. The results indicated that the Modbus/TCP data transfer between client and server was realized stably and effectively by combining with Modbus/TCP protocol and establishing several thread functions..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 70 (2013)
Research on distributed optic fiber carrying capacity and temperature security monitoring system
YANG Bin, TIAN Jie, JIANG Jianwu, SHEN Chunguang, and DUAN Shaohui
In order to meet the application requirements of power cable security monitoring, a design method of distributed Optic Fiber Carrying Capacity and temperature security monitoring system with Raman distributed fiber temperature sensing technology as core is proposed. This system uses Raman distributed fiber temperature In order to meet the application requirements of power cable security monitoring, a design method of distributed Optic Fiber Carrying Capacity and temperature security monitoring system with Raman distributed fiber temperature sensing technology as core is proposed. This system uses Raman distributed fiber temperature sensor to monitor the temperature, the carrying capacity and other running status of the power cable line in the power grid in a real-time, intelligent and all-around way. The experiment shows that, the system can supervise the conductor′s temperature and carrying capacity′s running status of 20 km long power cable, and calculating the conductor′s temperature and actual measurement with the maximum deviation less than 1 ℃ and the locating accuracy is 0.5 m. Using finite element calculation, the correspondence of cable temperature and cable carrying capacity were obtained, which coincide with the actual condition..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 75 (2013)
Improved flame photometric control system
LEI Zhenyong, and SUN Guoqiang
Flame photometer is mainly used for detecting concentration of alkaline metal ion in solution, and has been widely used in medical care, agriculture and industry. Currently, the flame photometric control system is poor in scalability and too complicated in operation, for it mainly consists of the MCU circuit or generalFlame photometer is mainly used for detecting concentration of alkaline metal ion in solution, and has been widely used in medical care, agriculture and industry. Currently, the flame photometric control system is poor in scalability and too complicated in operation, for it mainly consists of the MCU circuit or general integrated circuit. Therefore, an improved flame photometric control system was put forward, adopting S3C2440 as master chip, using the Linux operating system and touch screen operation interface, with software to realize calibration. Detailed analysis was given for the working principle of the flame photometer, hardware design and software realization of its control system. The whole system is having a friendly man-machine interface, an easy operatability, a high degree of intelligence and a low power consumption. It is also stable and reliable..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 80 (2013)
A research of laboratory instrument for LED property measurement
ZHANG Qian, ZHANG Xuedian, CHANG Min, and MAO Chenfei
A design principle of LED features detection equipment based on micro fiber optic spectrometer is introduced. To reduce the self-absorption error caused by measuring luminous flux from integrating sphere and the error of LED luminous flux caused by temperature increasing, the LED is placed with the detector into 90A design principle of LED features detection equipment based on micro fiber optic spectrometer is introduced. To reduce the self-absorption error caused by measuring luminous flux from integrating sphere and the error of LED luminous flux caused by temperature increasing, the LED is placed with the detector into 90° to solve the problem. Meanwhile, in order to achieve the goal of miniaturization high-resolution, the fiber optic spectrometer module uses non-symmetrical cross Czerny-Turner spectral structure. A design of the adjustable constant current source is purposed based on the influence of LED luminous flux by forward current. The results show that the research has certain guiding significance in developing micro LED features detection equipment. Since the constant current source is adjustable and can be displayed, the influence of LED optical features by current changing can be clearly observed..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 84 (2013)
Growing model and numerical simulation of Al/Zr multilayers
YANG Chuanchun, ZHONG Qi, and ZHANG Zhong
Al (1%wtSi)/Zr multilayers were fabricated by DC sputtering techniques on doped fluoride glass substrates for 17~19 nm extreme ultraviolet radiation. The surface roughness of the multilayers with variable layer pairs (N=10, 40, 60 and 80) were measured by an atomic force microscopy. Their reflectivities were measured aAl (1%wtSi)/Zr multilayers were fabricated by DC sputtering techniques on doped fluoride glass substrates for 17~19 nm extreme ultraviolet radiation. The surface roughness of the multilayers with variable layer pairs (N=10, 40, 60 and 80) were measured by an atomic force microscopy. Their reflectivities were measured and fitted based on multilayer growing method improved by Stearns. Experiment and analysis present that the interface roughness were variable with the growing of Al/Zr multilayers and coincide the Stearns′ method as N≤40..
Optical Instruments
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 1, 89 (2013)
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