A Mach-Zehnder interferometer using a Twin-core Fiber(TCF) was researched for temperature sensing and a comb-filter based on the in-fiber Mach-Zehnder Interferometer (MZI) was fabricated by splicing a section of single mode TCF be

A novel technology for fabricating WolterⅠgrazing mirrors by an elastic ball tool was described in this paper. According to the Hertz contacting theory and Preston equation, a removal function model for tool movement on a cylinder

To precisely measure the thickness and thickness distribution of a self-supporting metal film, the measurement technology based on a chromatic confocal spectral sensor was established. The measurement principle and system structur

The self-mixing interference based on a Vertical-cavity Surface-Emitting Laser(VCSEL) was investigated. By taking a VCSEL as the source of a self-mixing interferometric system, the effect of different types of scattering surfaces

To manufacture the integrated circuit chips at 90 nm or below their nodes by using a 193 nm exposed wavelength deep ultraviolet lithography, a beam shaping unit for the lithographic illumination system was designed to achieve the

Storage reliability of Fiber Optical Gyroscopes(FOGs) was studied based on a multivariate degradation data method. Firstly, the dependence of multivariate performance degradation data was analyzed by means of the covariance matrix

To compare the luminous efficiencies of different street lightings, it is necessary to establish an appropriate photometric measuring model.In this paper, two kinds of traditional street lights and two kinds of Lighting Emitting D

The design and manufacturing of interferometric exposure systems with high wave-front flatness and structural stability is a paramount condition for development of high-quality holographic diffraction gratings. A ray-tracing was c

When a vehicle-borne tracking and position device is used to track a Low Earth Orbit(LEO) satellite,the obtained prediction data of the satellite orbit by the traditional satellite tracking software usually show a lower prediction

A thermal control system of electric cabinet in a high-resolution space camera was designed to resolve its heat dissipation. The basic flow sheet of thermal design for the electric cabinet was introduced,and several kinds of appro

In order to increase the workspace and carrying capacity of a robot shoulder joint and to improve its popularity and adaptability, a novel robot shoulder joint was proposed based on 3-RRR orthogonal spherical parallel mechanism. T

In order to reduce the influence of vibration on the image quality and precision stability of a airborne electro-optical surveillance platform,a vibration damping design was performed. Based on the detailed analysis of complex dam

The influences of Built-up Edge(BUE) phases of a rake face on the characteristics of surface profile of micro cutting were researched, which provided the proof for the optimal selection of cutting parameters and the evaluation for

A digital microfluidic chip by electrostatic manipulation was designed and fabricated for a micro total analysis system. The principle of the electrostatic manipulation was proposed and the fabrication processes and experimental p

To realize the measurement of the air flow vector on a Micro Air Vehicle(MAV), a new type of hot-film anemometer which was lighter than a pitot and firmer than a hot-wire anemometer was developed and a corresponding combined syste

In order to overcome the measurement errors of traditional microwave power sensors due to mismatch and thermal losses, a symmetrical microwave power sensor based on the Micro-electro-mechanical System(MEMS) was proposed and its mi

The capacitive signals of capacitive carbon nanotube humidity sensors are usually tested by measuring instruments, which restricts the uses and developments of the sensors seriously. Focusing on this problem，one kind of capacitive

For thermomechanical fabrication of the micro/nano structure, a micro-heater made of Al doped poly-Si was fabricated. The Al doped poly-Si film was prepared by annealing from Al/a-Si∶H compound film under 750 K for 18 h on a Si3N4

A self-built nonlinear ultrasonic test system was established and the interaction between ultrasonic waves and cracks in metal materials and the distortion effects of ultrasonic waves were researched to implement the ultrasonic te

To research the performance of ground-based large telescopes and to optimize the design and structures of telescopes,the finite element analysis for the whole assembly was performed. For a 1.23 m telescope,the structural character

To satisfy the engineering requirement of high precision north-finding, the north-finder based on a Rate Biased Ring Laser Gyroscope (RBRLG) and its measurement error come from the scale factor of RBRLG were studied to solve the p

To improve the reliability and security of maching exact details in space equipment and to shorten their developing periods,a real-time detecting method for the metal cracks in machining exact details was presented. According to t

In consideration of the effect of the distortion error of an image on the accuracy of planar geometrical measurement in the precise visual metrology,a method to correct the image distortion by using standard grid board directly as

To improve the measuring accuracy of an image measuring system,the super-resolution image reconstruction technology for an image sequence is researched based on the micro-displacement.As the high accurate micro-displacement is dif

A context adaptive tri-element Run length coding algorithm and an Exp-Golomb coding alogorithm were introduced.The Run-length coding was used to model the image wavelet coefficients and the Region of Interest(ROI) mask and to yiel

A fast moving-object detection algorithm based on inter-frame Variant Compensated Blocks Difference(VCBD) is presented to deal with the complex scenes with camera scan, dithering and object moving. Firstly, the global motion estim

The multi-mode combined polishing technology based on traditional polishing and numerical control polishing methods was introduced. The simulation of material removal rate, one of the key processes of the multi-mode combined polis