A calibration model for determining the cotton content in cotton-terylene textile precisely was established.The near infrared spectra of 50 cotton-terylene textile samples were collected using self-designed accessory,and Savitsky-

Several effect factors on the radiometric calibration results of space ultraviolet remote sensing instruments in orbit were studied,for the diffuse reflection ratio of a diffuser was changed in space environment.A device to study

A design of spectral tunable Light Emitting Diode(LED) light source composed of an integrating sphere and a large number of LEDs was described.The source was designed to produce different spectral distributions in the visible regi

In order to get enough information,and to avoid the big chromatic aberration of wide spectrum and the complexity of optical system,a harmonic diffractive/refractive optical system was established by making the best use of science

In order to investigate the Atomic Force Microscope(AFM) based nanoindentation process of monocrystalline copper film,a three-dimensional molecular dynamic simulation model of nanoindentation process was established.The Morse pote

In order to improve the transmission property of Frequency Selective Surface (FSS) structure,a novel element FSS containing an improved cross element was presented.By applying modal matching approach,the novel element FSS was comp

As a very important Resolution Enhancement Technology (RETs),Off-axis Illumination (OAI) is widely applied to optical projection lithography system.Application of Diffractive Optical Element(DOE) to OAI not only can cotrol precise

An optical design method for large aperture zoom optical system was introduced.The optical system was divided into two segments called front optical system and back optical system.The front optical system used a reflective system

The spin drive principle of superconducting rotor and a fiber optic sensor measurement system used in spinning superconducting rotor instrument were introduced.The measurement system includes a displacement fiber optic sensor,a sp

In order to realize one-to-many and many-to-many communications for optical waveguide matrix switch,a new type of optical waveguide matrix switch was designed.Two switch units were defined on analysis of the basic structure of Mac

In the design of cubic phase plate testing system by taking Computer Generated Hologram(CGH) as a null lens,two very important principles are the wavefront aberration of cubic phase in propagation and the separation of diffraction

The multilevel diffraction spectrum of target image on the filtering plane produced by the periodic structure of Space Light Modulator(SLM) in Vander Luget Correlator(VLC) was obtained.In order to increase output correlation peak

In order to measure accurately the refractive index of optical glass to improve the imaging quality of optical systems,several measuring methods of refractive index for optical glass were analyzed and both foreign and domestic dev

In order to solve the thermal effect problem of diode bar side-pumped laser slab,a temperature modeling of laser slab according to the practical situation was established based on analysing on the temperature field and thermal dis

To obtain the distortion of three-mirror off-axis,the calibration method and procedure of a system are presented,the principle and the composion of calibration system are also introduced.The distortion of three-mirror off-axi is a

A high-precision optical angular measurement method is proposed to measure the torsion angle based on the Moiré fringe produced by double diffraction grating interference.In order to validate the validity of measurement equipment

An extraction algorithm for missile bullet multiple targets is researched.By OSTU method,the numeral image is changed into binary image,and the center position and the target area are extracted separately.At the same time,the targ

In order to get the video image with large visual field in range instrumentation,a system of auto-stitching multi-lens image with large visual field is established and its applied algorithms,such as image matching,marking lapped a

In order to satisfy the requirement of real-time tracing for photoelectric theodolite with multi imaging systems and to guarantee tracing precision and reliability,a new servo-control system according to Multiple Instruction Multi

The turbulence and overshot come from switching tracking mode in theodolite system are investigated.A math model of the system switching is established and the reasons for these problems are figured out in theory.In order to impro

The dimension and configuration of space camera is mainly determined by the optical system of the camera.for certain optical design specifications,it is necessary for realizing miniaturization,lightening and high reliability of ca

In order to study the structure stability of fine support components made of Carbon Fiber Reinforced Polymer (CFRP) in a large-aperture space optical remote sensor,a CFRP joint cylinder between primary mirror and second mirror was

Quantitative Fault Tree Analysis (FTA) is very effective in analyzing the reliability and safety of space camera software system.Aiming at the difficulty to get information of system faults and construct of fault tree,a method est

In order to realize the thermal control of high-power Focal Plane Apparatus (FPA),the thermal design of FPA was studied according to the structure characteristics of the FPA by simulation and experiment.The main requirements of th

ICL7667 was used as a power MOSFET driver in stepper motor drive system in order to increase switching speed of the power MOSFET and to realize high-frequency chopping control for stepper motor.The gate capacitance and switching t

In order to realize high precision image motion compensation,the requirements of space camera system was put forward by analyzing the effect of aerocraft attitude on image motion compensation.The image motion match characteristics

The laminated photoresist sacrificial layer technology and residual stress control in micromirror fabrication were investigated.Pollution problems in electroplating related to the photoresist sacrificial layer were discussed and t

In order to eliminate the deformation and improve transmission precision,the simulation method for deformation of flexible wheel is researched under actual situation.Under the condition of the load torque of great speed ratio fric

On the basis of the six-wafer combustor used in a micro-gas turbine engine developed by Massachusetts Institute of Technology(MIT),a two-dimensional Computational Fluid Dynamics(CFD) simulation was employed in studying the effect

A new non-IC method for fabricating micropipettes was presented to improve traditional micropipette fabrication from pulling of glass capillary to solve problems such as easily brittle fracture,hard to control length of microchann

For correcting the erroneous dropping of external stores on dropping mechanism of aeronautical weapons,a finite element technique was adopted to analyze on the hook,sector rocker and sector wheel to find out the reasons for errone

A new ship distortion measurement method based on image network transmitting technology was presented and the theory and the actual application of the new method were validated.The distortion measurement system of the ship was int

A new uncertainty estimation method was researched based on Monte Carlo evaluation,for some uncertainties of large-scale measurement could not be analyzed by conventional methods,especially for special fitting task.In proposed est

The state-of-art of the related research for radial magnetic couplings was reviewed.A practical mathematical model and a novel criterion were set up.And then,improved Equivalent Magnetic Charge(EMC) method was compared with origin

In order to provide high quality information security service in public network,a new scheme is developed for constructing a secure Virtual Private Network(VPN).In this scheme,security protocols are separated from operating system

In order to improve the automatic light adjustment for traditional CCD camera system in engineering,a new full-automatic light adjustment method for CCD camera system was presented.In this method,light was adjusted by combining ex

Based on original Nonnegativity and Support constraint Recursive Inverse Filtering(NAS-RIF) algorithm,an improved blind image restoration algorithm was proposed.In order to achieve the trade-off between the fidelity of observed im

3D image merging is a key technique in large scale free-form surface measurement.Based on image-control-point-restraint theory,a new 3D image merging method is presented.In the method,a pseudo-random space code is firstly projecte

Based on the invariance of cross-ratio and the collinear property of all points for one dimensional target,a global calibration method of multi-vision sensor system is proposed.The global coordinate frame is constructed based on t

For achieving high precision measurement of linear profile for micro-parts,an evaluation algorithm of linear profile based on discrete points is proposed according to the imaging characteristics.Firstly,an edge detector is used to

In order to improve the accuracy of optical tracker,the macro pixel method is used for estimating initial target region.A term,valid pixel ratio,is put forward and then is applied to analyze the effects of noise and asymmetry on t

Several kinds of experiments by proposed methods is carried out based on combining interpolation and wavelet image fusion to improve the resolution of ultrasonic images,especially for transverse resolution.The experimental results

In order to realize real-time rendering for medical images on PCs,a scheme combining multi factors for assigning optical attribute to resampling points is defined,and then a novel rendering algorithm for medical volumetric data is

Aiming at problems of both the contour initialization and the robustness in traditional segmentation methods for Intravascular Ultrasound(IVUS) images,a novel scheme is proposed to segment IVUS images of plaques based on the activ