A portable nonmydriatic digital retina camera in 30° field of view was designed based on Gullstrand-Le Grand eye model.By considering the aberrations of both human eye and camera,this design realized the highly clear image with 2

The radiometric calibration for UV-ICCD was investigated to build the relationship between the input irradiance and the digital output.The theory of radiometric calibration was derived and the radiometric calibration of the UV-ICC

A Φ100 mm deformable polishing lap consisting of 19 PZT actuators was designed and manufactured to polish a hyperboloid mirror with Φ=350 mm,k=-1.112 155,and R=840 mm.In order to analyze the influence of location error on surface

An ex-situ determining method was proposed for the optical constants of aluminum thin films precisely.Compared to the traditional in-situ method,the method had no need of the complex optical measurement apparatus attached to vacuu

An auto-tracking and guiding system for full solar disk image was introduced based on mass-center algorithm and large CCD-array.An embedded system with high speed processing ability was used to compute and process mass-center data

In order to design the beam-shaping system of Laser Diode Arrays(LDA) and to evaluate the beam quality of LDA availably,effects of non-luminescence of Bar on beam properties of LDA were studied.Based on farfield bi-peak structure

SiC:H surface-modified coatings were fabricated on Reaction Bonded Silicon Carbide(RB SiC) substrates.Silicon was evaporated by E-beam and methane was ionized as reactive gas by End-Hall ion source.X-ray Diffraction(XRD) results s

Based on phase Shifted Superstructure Fiber Bragg Grating(SSFBG),the structure and bipolar encoding/decoding principles of an Optical Code Division Multiple Access(OCDMA) system were researched and its correlation property was sim

In order to improve the coupling effect of focused laser and waterjet fiber,a new coupling system consisting of an accurate coupling alignment system and a special coupling unit was designed,and a special coupling alignment method

After introducing to the inner structure and the driver timing of a interline area-CCD KAI-1010M briefly,a high speed and low cost CCD driver circuit used in digital space survey camera was designed in a new way.In order to resolv

In space environment,the micro-lens of interline transfer progressive scan Charge Coupled Device(CCD) will become fuzzy,for the effect of space ray in a long time results in bad quality image of the space camera.However,an interli

In order to meet the requirements for high reliability of space camera controller,a self-testing method of Digital Signal Processor(DSP) space camera controller based on mixed language programming was proposed.With this method,the

In order to reduce the influence of outside load on the surface precision of primary mirror in a space remote sensing camera,a design idea of adopting diverse flexible support structures to restrict motion freedom of the primary m

For purposes of designing a mapping camera with high image quality for stereoscopic mapping task,the design,manufacturing and assembly for the lens of a mapping camera are investigated.the design of the lens is issued from materia

In view of the features of an on-board embedded software,an on-board embedded software testing process model,butterfly model based on W model and X model,is proposed.This new model not only reflects the test for entire development

A new calibration method for Extreme Ultraviolet(EUV) monochromator was presented.By measuring the 30.38 nm and 58.43 nm lines of a standard He hollow cathode source and the reflectivity peak of a calibrated Mo/Si multilayer mirro

To satisfy the requirements of 13.9 nm Ni-like Ag and 19.6 nm Ne-like Ge X-ray laser researches,Mo/Si multilayer mirrors were prepared,and a small and simple structure reflectometer easy to operation was designed.A reflectivity-me

The Extreme Ultraviolet Telescope(EUT),as a high-resolution imaging instrument,its optical performance measurement directly impacts on the image quality,so the imaging performance of aligned EUT is tested in this paper.The measuri

In order to measure the changes of optic characteristics for spacial materials before and after space radiation,a in situ optic measuring system with high precision and wide scanning wavelength was designed to measure feeble signa

A novel method based on Least Square Support Vector Machine(LS-SVM) and genetic algorithm to select the temperature sensors of a Numerical Control(NC) machine tool was presented.The measurement points in a CNC lathe were grouped b

Repeat sun-synchronous orbit is one of the most important orbits for earth observation missions,because the orbit can satisfy the requirements of illumination and temporal resolution.Q value is the connection between sun-synchrono

In order to resolve the problem that Laser Tracker System(LTS) can not continuously measure Corner Cube Retro-reflector(CCR) position in dynamic conditions for CCR's receivable angle is restricted,an angular automatic calibration

In order to investigate the copper gap-filling in micro electroplating process with additive(N'N-diethylthiourea),the electrochemical behaviors of electrolyte were analysed by SEM,CVS and XRD,and the electrode dynamic parameters w

In order to fabricate vitreous microfluidic components with round cross sections and microchannel networks with nude structure,a hot rheologic deformation puller for fabricating vitreous three-way microchannel was designed.In the

To resolve the problem of the gyro decoupling on two-axis and three-axis photo-electric platforms,and improve their stabilizations,the gyro coupling reason of two-axis photo-electric platform was analyzed,and a secant decoupling a

In order to investigate the mechanism of acoustic landmines detection,an acoustic-to-seismic coupling based experimental system was developed,and a curve-fitting method was adopted to study the measured complex signals.Acoustic-to

For acquiring the mean line of workpiece profile,a new kind of digital smoothing filter based on cubic generalized spline function was proposed.The generalized B spline functions were derived from the linear differential equation,

According to the output performance of inchworm-type piezoelectric actuator,a novel close-loop control method based on the subsection experiential equation between actuating voltage and corresponding stepping motion displacement w

A self-organized Local Linear Embedding(SO-LLE) algorithm is proposed.This new algorithm can not only determine the value of the nearest neighbor automatically and decrease the operation quantity,but also can gain a perfect approx

In order to ensure the security of transmitted digital image effectively,an invertible chaotic 3D map based image encryption approach and its optimized algorithm are proposed based on the stretching and folding mechanisms of chaos

The effect of pulsating magnetic fields on the transient outward K+ channel of rat cortical neurons was researched.This experiment used pulsating magnetic fields with frequency of 15 Hz and intensity of 1.4 mT to impose on acutely

A data collection method is proposed to support hybrid sink mode in wireless sensor networks where static and mobile sinks coexist.One or more mobile sinks cooperate with the static sinks to broadcast status update periodically on

To solve the problems on the important ultrasonic noise and the quality degradation of data in ultrasonic imaging,a novel image enhancement algorithm by calculating the Non-stationary Degree(NSD) of the image is proposed,which hig

To measure the ultra low current in a quadrupole mass spectrometer(QMS) by a preamplifier,low noise and wide bandwidth is the key to this system for its current is from 10-11 A to 10-6 A and varies quickly.So a Non-inverting Input

In combination with Wavelet Transform(WT),Two-dimensional Principal Component Analysis(2DPCA) and Ellipsoidal Basis Function(EBF),a fingerprint recognition algorithm based on WT,2DPCA and EBF neural network(EBFNN) is proposed.Orig

Due to the universality of Cellular Automaton(CA) model,many applications have been found in traditional cryptography and image processing.Combined with Cellular Automaton Transform (CAT) compression technologies,an image encrypti

In order to obtain optimization threshold for the centroid algorithm,several kinds of influencing factors,such as signal-to-noise ratio,discrete gathering of star point and so on,are studied.Based on theoretical computation,a func