On the basis of Fraunhofer diffraction theory,the diffraction patterns of a Varied Line-space(VLS) grating were obtained for incidence beam in parallel and uniform.The intensities of the diffraction spots changing with diffraction

In order to detect weak ultrasonic signal,a high-sensitivity optical heterodyne interferometer was developed.A linearly polarized laser with good coherence was used as light source to improve interference intensity,and a diaphragm

In order to analyze the possible defects effecting on efficiency of three types of industrial silicon solar cells:P-type of cast-multicrystalline silicon,Edge-defined Film-fed Growth(EFG) and single silicon solar cells,several imp

In order to bring forth a new method to design Wovefront Coding(WFC) system with commercial lens design software,a new merit function formed by the traditional imaging quality factor,Strehl Ratio(SR) and Encircled Energy(EE),was p

The effect of aerosol fine particle(PM2.5) on the visibility was discussed,and the relationship between PM2.5 and visibility was established theoretically.The relative PM2.5/PM10 and extinction coefficient were analyzed with chang

The performance requirements of pose and position fine tuning apparatus for secondary mirror in large optical telescope were analyzed.Based on Gough-Stewart manipulators,two design criteria for the optimal design of pose and posit

In order to solve initial alignment of antenna for laser communication system between an aircraft and a ground station,the composition and algorithm theory of an antenna alignment system were demonstrated in detail,and the experim

On the basis of imaging principle of a coaxial spherical surface optical system,a new measuring method using glass capillary for the the refractive index of micro-quantity liquid was introduced.The refractive index was obtained th

A software-based method called extrapolation method was presented to overcome the trade-off between the sensitivity and the dynamic range of displacement of Shack-Hartmann Wave-front Sensor(HS).Firstly,a beginning focal-spot of a

In order to realize on-line measurement for pesticide residua in soil,a fiber-optic fluorescent measuring system was put forward.The foundational principle of organic molecules emitting fluorescence and the feasibility of measurin

In order to improve the mechanical reliability and lifetime of a series contact Radio Frequency Microelectro-mechanical System(RF MEMS) switch with dielectric bridge,the fabrication process was studied.The switch structure was ana

A system using a Single Chip Micyoco(SCM) to test and control the speed of ultrasonic motor was studied.Based on the relation between the ultrasonic motor's speed and its driving frequency,the speed of ultrasonic motor working in

In order to obtain the force depth curve directly and change the loading time,keeping load time and unloading time arbitrarily in the nanomechanical property measurement by Atomic Force Microscope(AFM),an AFM system was modified.A

For online monitoring micro-size drilling,a fuzzy control method based on rough set was developed to improve original control method on too many fuzzy rule numbers and complicated calculations for a high-dimensional input fuzzy sy

In order to realize the geometric measurement of large scale workpiece,a measuring net for multiple measurement stations was established.With the aim of the information fusion of multiple measurement station,a relevant multi-senso

An application of Laser Scanning Confocal Microscope (LSCM) in micro-structure analysis was discussed in order to enhance the analyzing and measuring levels of micro structure.LSCM could be used to measure large angle because of i

By taking slot arrays as illustrative examples,the compound structures of Frequency-Selective-Surface(FSS) and dielectric slab were investigated based on modal matching method and experimentation.The frequency responses of FSS str

To study the characteristics of Micro-hotplate(MHP)based vaccum sensor at constant temperature working mode,the influences of working temperature and dimensions on the working characteristics of MHP-based thermal vacuum sensor at

In order to obtain the six-component force sensor with excellent comprehensive performance,a novel pre-stressed six-component force sensor based on Stewart platform was presented,and its position and orientation error was analyzed

In order to improve the actuator precision,a method for eliminating nonlinear and no-smooth hysteresis characteristic of piezoceramic actuator was proposed.An inner product-based dynamic neural network nonlinear and no-smooth hyst

A Progressive Graphic File(PGF) compression encoder based on xDM standard was presented for the real-time image compression of a solar image.The PGF compression algorithm with advantages of natural image compression and compressio

A motion estimation algorithm of serial star images based on adaptive window selection PIV technique is proposed.The algorithm chooses the analysis window of maximum energy by an adaptive method.Then,the global motion parameters c

According to the theory of first-order Born approximation,a Fourier Domain Optical Coherence Tomography(FDOCT) model of single scattering infinite narrow beam is established,and the reason why it is hard to obtain the exact soluti

In order to improve the robust of image information hiding method and to increase the hiding capacity,a High Significant Bit Hiding(HSBH) algorithm against SPA(Sample Pair Analysis) analysis is proposed.The idea and the principle

In the light-sectioning method,it is difficult to accurately extract light-knife center contour due to those influences such as sun light,surface texture information and the low reflection of measured object,So an effective soluti

A multi-view 3D datum mosaic method is presented by measuring optical coded points in an overlapped area in two partial measurement units with a stereo vision sensor.The method obtains the stereo vision sensor's location and attit

An embedded block wavelet coding method based on block bit-length is put forward for resolving the problem of occupying a large amount of memory in coding process for a wavelet coder.The memory occupancy can be reduced and coding

According to the characteristics of the remote sensing images for ocean surveillance satellite,an adaptive near-lossless compression algorithm based on ROI(Regions of Interest) is proposed.After maximum lifting of morphological Ha

In order to eliminate the measurement error caused by video camera rotation during its moving along the axis,a high precision video camera moving estimation algorithm based on the feature point matching of sequence image frames an

An application of optical coherence tomography to jade measurement was described.An optical coherence tomography(OCT) system applied in jade imaging and measurement was implemented with scanning speed of 1 frame/s,depth resolution