The deformable aspheric polishing lap based on Piezoelectric(PZT) actuator can change the lap surface continuously to fit the surface of middle aperture aspheric optical mirrors at any location. In this paper,a 100 mm diameter and

High-power laser diodes based on GaAs semiconductor bars are well established as reliable and highly efficient laser sources. As increasing applications of semiconductor lasers in the laser processing, the single laser diode optic

An infrared CO2 gas sensor was developed based on space-double-beam structure. First,the structure and working principle of the optical probe were introduced.A new-type gas cell was presented and the optimal size of the gas cell w

To study the effect of spectral curvature on the acquired radiant signal by imaging spectrometer with prism dispersion, the errors of acquired signal between with spectral offset 0.01, 0.05, 0.1d (d is pixel dimension) and without

A Grazing Exit Micro X-ray Fluorescence (GE-MXRF) system involved with a polycapillary X-ray lens was established to analyze nanometer films. A polycapillary X-ray lens with spot size of 41.7 μm was applied to focus original X-ray

A Laminar grating with a 1 000 lp/mm rectangular Laminar groove profile, 13 nm groove depth and a 0.43 duty cycle is fabricated by holographic ion beam etching. The grating is coated by Au in thickness of 40 nm. When the work wave

The Separation of Interference Fringes of the Main Diffraction Maxima (SIFMDM) and the second maximum for Cross Segmented Wedge Array (CSWA) focus system were derived, and the change rules of the Small-scale Irradiation Non-unifor

In order to realize 3D shape acquisition for large free surface, a data registration method using optical location tracking technology was proposed. A planar target was fixed on the measurement system as the intermediate, the coor

In order to minimize volume, lighten the weight of a spaceflight camera effectively and satisfy the requirement of cold copy , the design for spaceborne absolute photoelectric encoder of dual numerical system is put forward in thi

In order to improve the dynamic performance of the correlation tracker in a Space Solar Telescope, and to verify the feasibility and reliability of a beryllium mirror working in visible band,the tip-tilt mirror of the correlation

In order to improve the fabrication results of polishing off-axis aspheric in Computer Controlled Optical Surfacing(CCOS), a novel algorithm named adaptive programming model to generate a polishing tool-path is discussed based on

A transmission grating with an area of 1 mm × 1 mm, a pitch of 300 nm, and a gold thickness of 1 μm for X-ray imaging and microscopy is successfully fabricated by combining electron beam lithography, X-ray lithography, and electro

A frequency response measurement method was proposed based on the digitization characteristics of O-E tracking servo system. The testing signal, data acquisition mode, the extraction of amplitude and phase,and hierarchical identif

In order to explore the feasibility of the large lightweight SiC primary mirror, the different lightweight forms were compared and a supporting way for the primary mirror was determined. After theoretically calculating the light w

To meet the needs of detection of space faint objects for a telescope with large aperture and short focal,a binding drawtube telescope scheme to detect space object is presented to overcome the shortcomings that focal length grows

To realize the active control of each segment of a segmented telescope, the figure control equation of hexagonal mirrors was built up, and the impact of sensor location on figure control system was studied. A working manner of the

By comparing of the research and development of optical system in a large telescope at home and abroad,a scheme for establishing error budge system was presented to determine the influential factors on optical system to ensure the

The mechanical mode of an Half coated Metal core Piezoelectric Fiber (HMPF) actuator is established. According to the constitutive piezoelectric equations, the analytical expressions of the tip deflection, blocking force and the n

On the basis of a new type of functionally gradient (FG) piezoelectric actuator proposed by the authors in their former study,the new actuator is designed, fabricated, modeled and experimentally studied. The material compositions

Application of active vibration control system based on piezoelectric elements in real-world structures is limited by its requirement for complicated signal processing system and bulky energy supply system;the passive vibration co

To fabricate high-performance lead-free piezoelectric ceramics, both the solid-state reaction method and the hydrothermal method were used to synthesize the (KxNa1-x)NbO3 (KNN) lead-free ceramic powders in this work. The ceramic p

To ensure safety for a handling robot used in polymer microfluidic chip, a reliability design was presented by researching the collision protection between handling robot and objects around. A collision protection system mainly ba

A novel linear hydraulic motor driven by piezostack pump (piezohydraulic motor) was presented, and its structure and working principle were introduced. With establishing the static-state model, the influence factors of the piezohy

In order to eliminate the vibration of Magnetically Suspended Flywheel(MSFW), the disturbing sources of MSFW are analyzed.Aimed at the suppression of main disturbing sources, the unbalance vibration, a new active vibration system

A mechanical grating tiling device is designed by a macro-micro dual-drive parallel mechanism with a few Degrees of Freedom(DOF). The raster matching device is composed of a macro-moving part using a step-motor controlled ballscre

In order to achieve smooth wet etching surface of silicon, ultrasonic technology is introduced in the wet etching of silicon. By improving the ultrasonic wet etching system, the temperature difference between top and bottom etchin

In order to get geodetic coordinate and guide an aircraft to capture target,a measuring orientation method is proposed to obtain the location coordinates of aircraft and known target by GPS technology.Then,a homogeneous coordinate

In order to improve the accuracy of iris recognition further, an iris recognition method based on the maximal responding orientation of phase congruency is proposed. Firstly,the normalized iris images are obtained by preprocessing

In accordance with complicated object movement and changeable object environment, a multi-pattern fusion algorithm for target tracking is presented. Mean-shift and particle filter algorithms widely applied to target tracking are s

An autonomous predictive centroiding algorithm of unmatched stars is presented in this paper to obtain the real star centroidings of identified stars with star tracking algorithm. All the unmatched stars within Field of View(FOV)

The working principle of curtain type shutter in an aerial camera is introduced and the relationship between sensitive characteristics and resolution for a film is analyzed. Then, expression of the best exposure is deduced by the

In order to obtain steady image sequence from unsteady camera and to realize object tracking based on image stabilization,a separating method of active scanning movement from random jitter of camera are presented. Mean Shift with

To realize color image segmentation, target identification, feature extraction, and other image processing projects, the image preprocessing methods are researched. Based on analysing characteristic of digital camera and human vis

In order to eliminate the interference of airborne environment and to improve the precision of decode and the EMC ability, the filtering of IRIG-B (AC) and the compensation of phase hysteresis caused by the filter are studied. A b

To establish a more effective string pattern matching algorithm, a new improved star identification algorithm taking angular distances between main star and neighbor stars as recognition characteristics is designed. A guide star c

In order to improve the speed of restoration algorithm, a parallel Wiener filtering method based on Graphic Processing Unit(GPU)platform is presented to restore motion-blurred aerial image degraded in a deterministic way by motion

In order to realize the ultra high-speed image storage in the high accuracy measurement of opto-electronic tracking and measuring system, an image storage scheme based on Double-data Rate Dual In-line Memory Module(DDR DIMM) array