The sparse aperture array of Golay is analyzed. Then, the rule of Golay nonredundant configuration arrangement is derived based on the equilateral triangular set and a novel sparse aperture configuration named quasi-Golay6 is prop

In order to satisfy the requirements of large mirrors for the fabrication precision, the removal of zonal errors for a large aspheric is analyzed with the Multi-mode Combined Manufacture (MCM) technique in this study. The MCM tech

A optimization method is put forward for a wavelength stabilizer with dual Fiber Bragg Grating (FBG) used in 980 nm semiconductor lasers to meet the performance requirements of fiber amplifiers. The analytical expressions of trans

The working principle of the Solar Irradiance Monitor (SIM) boarded on FY-3A meteorological satellite for monitoring solar irradiance was introduced and its system construction and working modes were described. The SIM was compose

In order to improve the transmission performance of the all-fiber three-channel interleaver, a novel asymmetrical structure of a Mach-Zehnder interferometer(A-MZI) with three fiber arms is proposed. The A-MZI consists of a fused p

Off-axis Three-Mirror-Anastigmat(TMA)optical system is a most advanced optical system used in space cameras for earth observation presently. In this paper,the imaging mechanism of a off-axis TMA wide viewing field space camera is

The measuring principle of absolute reflectance factors was discussed, and a specific radiometer to measure both the incident irradiance and reflected radiance and a reflectometer to measure the absolute reflectance factor were de

To reduce the threshold and to improve the contrast of the conventional Holographic Polymer Dispersed Liquid Crystal(HPDLC) grating, a new type electrically tunable grating based on a Twist Nematic (TN) cell was designed. Firstly,

By use of aspheric optical elements,a portable Fundus Fluorescein Angiography(FFA) camera is designed based on Gullstrand-Le Grand eye model. According to the principle of selecting filter, a B-2A filter combination from Nikon is

The segmented telescope can realize the diffraction-limited imaging when segmented-mirrors are in co-phase. Therefore, an active optical experiment system was built to measure and adjust the phase difference between the two segmen

As corona discharge emits the light of Solar Blind Ultraviolet (SBUV) from 240 to 280 nm, the corona sparks can avoid the interference of sunlight when an object is detected in the SBUV region. To detect the position and intensity

The factors effecting on the diffraction efficiencies of blazed gratings were researched and the parameters fabricating the blazed gratings were determined by holographic ion beam etching. On the basis of above, two kinds of blaze

In order to make the measuring device quickly work and to reduce the measuring error from inclination, a scheme of real-time compensative leveling in the photoelectric measuring equipment was presented. On the basis of the optical

To achieve a high-quality quartz glass substrate and to improve the performance of photomask equipment, a Chemical Mechanical Grinding (CMG) method for the quartz glass is developed. By actively enhancing the chemical reactions of

A simple, practical, and effective method for measuring the rotation-angle-accuracy of the wavelength scanning mechanism in a Variable Included Angle Plane Grating Monochromator (VAPGM) was proposed in an ultra-high vacuum environ

The flow characteristics of the fluid in microchannels formed by different hydrophobic and hydrophilic walls on the polymeric microfluidic chips were researched in this study.To achieve the spontaneous capillary of the liquid in a

In order to evaluate the precision and stability of ozone profiles from the Solar Backscatter Ultraviolet Sounder (SBUS) on FY-3A satellite, the retrieval experiments were carried out by using SBUS measurements and the ozone profi

To improve the machining speed and precision of mechanical parts with complex shapes by Computer Numerical Control (CNC) machining, a B spline interpolation method for 5-axis CNC machine tools is proposed. By taking the Open and M

An assembling bolt machine for fracture splitting(FS) connecting rods was developed,for the traditional fixing procedure for bolts could not be suitable for the FS of connecting rods. The basic structure of the assembling bolt mac

The orientation errors of an alt-alt photoelectric telescope are analyzed to determine the effects of the main errors of telescope on measuring accuracy and to improve the pointing precision.By analyzing optical, mechanical and el

Injection molded micro-fluidic chips are characterized by that their micro grooves show perfect imaging quality in height but not satisfactory in width, meanwhile the chip cannot remain the uniform quality for the width of micro g

In order to meet the requirements of velocity control systems of large telescopes for the fast response,small overshoot,high steady-state accuracy and smooth running, a Variable Structure PID(VSPID) controller was proposed based o

Melt temperature distribution models for melting and plasticizing process of polymer materials were presented in vibration field induced extrusion, and the influences of process parameters such as die temperature, vibration amplit

A digital control current supply is designed for driving semiconductor lasers by taking the TMS320F28335 as a control center,which consists of a guiding light module,a phonetic module,a liquid-crystal display(LCD) module and a key

With the particular research on infrared and visible images, a fast color image fusion algorithm based on color transfer technique is presented. The method directly uses the grayscale fused image and the difference signals of inpu

In order to measure the three-dimensional shape of a large scale object in a long distance,a three-dimensional shape measurement system based on dual oscillating mirror scanning was designed and implemented. Firstly, the principle

In order to improve the detection speed for lines in digital images, an improved detection method was proposed by combining the time-frequency domain transform and the spatial domain transform. Firstly, the wavelet lifting was use

In order to analyze engineering surfaces fast and accurately, a new filtering approach based on Butterworth wavelet is proposed. Firstly, the transmission characteristic of a low-pass filter based on a wavelet is discussed,then it

In order to construct a reference model of human-machine identification texture direction,a metric algorithm for global texture direction is proposed.Firstly,a Gabor filter is designed to reduce the component less important direct

Hand contours are hard to be extracted correctly when hand images are illuminated by a unsymmetrical light.Therefore,this paper proposes a contour tracking algorithm based on the directional maximal gradient value according to the

By taking a high performance fixed-point DSP DM642 as a kernel processor, and a S3C2410 as a assistant control processor,an IR dual-band real-time image fusion system worked at Mid-wave Infrared (MWIR) and Long-wave Infrared (LWIR