Two-dimension axis symmetric physical model of Gaussian distribution pulse laser irradiation for semiconductor material was established by software COMSOL Multiphysics. The temperature field distribution of semiconductor GaAs was analyzed under irradiation of nanosecond pulse laser with wavelength of 1064nm by means of solving the thermal conduction equations, in consideration of the change of the thermal physical parameters of GaAs along with temperature. The influences of three kinds of heat exchange mode on temperature field of GaAs were compared. Calculation results matched with related experiments, which showed the built physical model is scientific, at the same thermal convection and thermal radiation could be ignored for calculating the temperature field of semiconductor materials under nanosecond pulse laser irradiation.

Two-dimension axis symmetric physical model of Gaussian distribution pulse laser irradiation for semiconductor material was established by software COMSOL Multiphysics. The temperature field distribution of semiconductor GaAs was analyzed under irradiation of nanosecond pulse laser with wavelength of 1064nm by means of solving the thermal conduction equations, in consideration of the change of the thermal physical parameters of GaAs along with temperature. The influences of three kinds of heat exchange mode on temperature field of GaAs were compared. Calculation results matched with related experiments, which showed the built physical model is scientific, at the same thermal convection and thermal radiation could be ignored for calculating the temperature field of semiconductor materials under nanosecond pulse laser irradiation.

Aerial remote sensing camera image capture has a huge data flow per second for image transmission.The image frames lost in the process of storing to hard disk.To solve this problem,an image data high-speed storage technology by hard disk and implementation method are introduced based on the miniaturization dual-band aerial remote sensing camera. The problem resulting in the frame losing is analyzed theoretically from multi-angle.The analysis is proved accurate by the experimental data.The bottle-neck is pointed out clearly during the image transmission.Finally,based on theoretical analysis and experimental data, the concrete solutions are proposed in both hardware and software:use RAID technology and allocate large cache in hardware,use WINDOWS multiple-thread programming combined HOOK technology in software.With the combination of these methods,the problem of the frame losing is solved successfully.Image data is stored without losing frames from 8frame/s increase to 24frame/s.The work efficiency of the hard disk is improved from 51.6%to 78.3%.

A reflective projection system based on Zernike polynomial surfaces is presented.The reflective projection system consists of three reflective mirrors with Zernike polynomial surfaces.The first mirror is concave to reduce the size of the second mirror and obtain high contrast ratio.The second mirror and the third mirror are convex to achieve a shorter projection distance and correct major aberration such as spherical aberration,coma aberration and distortion.The system is simulated and analyzed in detail by using ZEMAX software.Experimental results show that under the condition of relative aperture F-number=2.8,the MTF is more than 50% at 60lp/mm,the maximum distortion is less than 3.0% at screen amplification factor of 80,the designed system can satisfy the requirement of the high definition projection display.

A new optical engine consisting of LEDs, rectangular CPC, rectangular lens array and micro display chip DMD is designed by using of KOLA illumination algorithm for micro-projection display. Detail description and analysis of the rectangular CPC and rectangular lens array are provided. The influence due to the size of rectangular CPC and rectangular lens array is analysed for illuminance uniformity on the DMD chip and light energy efficiency of the optical engine system by software ZEMAX. Based on the analysis of parameter of rectangular lens array, the size of rectangular lens array more decrease the illumination uniformity. Experimental results show that the proposed illumination light optical engine can obtain perfect rectangular focula with higher light uniformity more than 90 % and higher energy efficiency of 40 % to meet the needs of micro-projection display, at the same time the designed illumination optical engine compared with other uniformizing light algorithm have advantages such as: lesser capacity, high illumination uniformity.

A new phase measurement method is designed and presented by using the technique of signal shifting phase and the technique of signal multiplication for laser rangefinder. The intensity of laser light is modulated by cosine circuit signal, at the same time the cosine circuit signal is thansformed sine signal by the shifting phase technique. Two signals mentioned above are multiplied by received signal from the target respectively, then being transmitted into signal processor after passing through low band filter respectively. The result of phase-shift between the received signal and sent signal is calculated by means of signal processor and time-counter with double frequency of modulation signal. The proposed system is composed of four units such as control and count unit, emitting and receiving unit of laser light, signal processing unit and result display unit. The two most advantages of proposed system over others are its ability of proper isolation which reduces crosstalk and its independency thermal drift. Theoretical calculations and experimental results have shown the accuracy better than 2 mm.

A light uniformizing algorithm based on rectangular CPC is presented for micro-projection display. The designed optical engine with rectangular CPC consists of LED, fly's-eye lens and micro-display panel DMD. The light uniformity on the micro-display panel and energy efficiency of the optical engine with rectangular CPC is analyzed by means of software. Experimental results show that the proposed light uniformizing algorithm and system compared with other uniformizing light algorithm and system have advantages such as lesser capacity, lesser Etendue, higher light uniformity more than 92% and higher energy efficiency of 43% to meet the needs of micro-projection display.

There mainly is laser digital photofinishing technique and digital photofinishing technique based on LCD consisting of TFT and LCOS in the digital photofinishing field at the present time. The former have a good many merit such as wide color gamut, high processing rate, large output size and high brightness, but his cost is very high, his maintain technique being comparatively complex, that result in difficult use for people. The utilization ratio of the latter is low because of lower resolution and lower aperture ratio for LCD, but the digital photofinishing based on LCD have lower cost and higher utilization ration, being suitable for people's current standard of living. Considering above mentioned problem, a micro-motion exposure method based on PZT piezoelectric ceramics used in digital image photofinishing is presented. The two-dimension micro-motion exposure system consisting of PZT piezoelectric ceramics, LCD panel, polarizing film and spring strip is designed. By means of PZT piezoelectric ceramics the LCD panel is removed about the one half of the pixel size of the LCD panel for four times from the original place, at the same time imaging system is exposed four times at the printing paper. The software is used to control the time synchronization, the exposure time and motion range of the LCD panel. The system has advantages such as shorter response time than 0.1seconds, lesser motion error than 0.01 microns, high stability and repeatability. Experimental results show that the proposed micro-motion exposure method improve the picture brightness and enlarge output size, at the meantime reducing the cost of the system.

A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera, achieved chromaticity coordinates error between compounded white light and standard white light D-65 less than the threshold beforehand setted by this technique, then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed, at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED, and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D-65, enhanced chromaticity uniformity of illumination field.

A standard white light compounding algorithm based on combination of chroma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED, then achieved chroma coordinates error between the compounded white light and standard white light D65, until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed, at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65, enhanced chroma uniformity of illumination field.

A uniforming light algorithm based on trapezoid light mixing barrel is presented by for multi-LED illumination.The light energy output is less,the angle of divergency is larger for single LED.Multi-LED is used as illuminace light source,increasing effective irradiance area and light energy output for illuminance light source.Each side in the trapezoid light mixing barrel is coated by high reflectivity film,reflecting the incident rays without absorption,sufficiently mixing the incident light.The illumination uniformity at output area is improved by adjusting of the length of trapezoid mixing barrel.Experimental results analyzed by TracePro software show that the proposed uniforming light algorithm achieved higher uniformity at 90% and better energy efficiency than FF two-focus optical system.In addition,the designed system is simple and easy to come true.

Piezoelectric gyro is the feedback measuring sensor of the gyro stabilized platform.For its output noise will degrade the control precision of servo system under low speed input.It is effective to improve the low speed quality by suppressing the output noise of gyro.In this paper,an algorithm based on AR(1) modeling Kalman filtering is proposed and applied in actual servo system.Thus,the control precision of servo system is improved from the(0.102 13°/s) with average moving to the 0.063 03°/s with Kalman filtering under the typical low speed input.Furthermore,the necessary restrictions for the filtering is analyzed and summarized for the Kalman filtering.Some relative experiments proved advantages in improving the low speed quality of servo system with Kalman filtering.