Micro scale grating has distinctive advantages and broad application prospects in controlling spectral emissivity of material. Based on rigorous coupled wave analysis (RCWA) and electromagnetic parameters, the spectral selective property of the emissivity of micro scale grating of steel in infrared band is investigated. Furthermore, combined with field distribution in grating region, the physical mechanism to form spectral and polarization selective properties is analyzed. The analyzed structure has guidance signification in the applications of infrared emissivity control.

Laser is the ideal electro-optic direct converter, so prolonging the life of the semiconductor laser and improving the reliability of the laser are always the research focuses of high power semiconductor laser. Two methods such as temperature stress acceleration and current stepping stress are used to perform the aging experiment of 808 nm high power semiconductor laser, and the life of the devices are 1 682 h and 1 498 h respectively, the same experiment result is obtained. Observation of the device after destructive aging tests using a microscope, failure reasons are analyzed and obtained, which are due to the surface degradation, solder degradation and bad ohmic contact.

The temperature rising and distribution of silicon material irradiated by laser are researched for reducing the influence of heat effect. A fiber continuous laser is used as a light power to irradiate silicon material surface to record the temperature rising and distribution of silicon material under different laser power density and irradiation time. And experimental data is obtained. According to experimental conditions and parameters, simulation and calculation are performed to get the temperature distribution model of silicon material under laser irradiation. The simulation data of the model accords with the experimental results. Laser cutting simulation experiment can be performed through correcting the parameters of the model, which provides experimental reference for parameter choosing during laser cutting.

A type of insulator-metal-insulator surface plasma polariton interface is proposed. According to Maxwell equations and boundary conditions, the dispersion characteristics of metal surface are analyzed. Finite-difference-time-domain (FDTD) method is used to simulate the field enhancement effect of Bow-tie and rectangular nano-structure under a single light source radiation and the field enhancement effects of double Bow-tie nano-structure under single and double light sources radiation respectively. Comparing and analyzing the simulation results show that the point effect plays an important role in the field enhancement effect of plasma polariton, and the field enhancement effect is associated with the distance between the nano-structures. Only when the distance between the nanostructures is right, the maximum field enhancement can be obtained.

According to the requirements of high light efficiency and low power consumption of light-emitting diode (LED), based on analyzing LED optical performances, chip on board (COB) technology is adopted. The luminous flux, luminous efficiency and color temperature of LED are analyzed under different electric current and lighting time. The elements influencing LED optical performances are researched, analyzed and tested. Results show that using two kinds of samples with color temperature closed to 3000 K, electric current increases from 500 mA to 900 mA, color temperature increases 1.685% and 2.626%, luminous flux also increases 68.532% and 84.625% with the increasing of the electric current, but optical efficiency decreases 13.535% and 9.971%. Under the same electric current condition, lighting times are 0~1 min, 0~5 min and 0~10 min, color temperature increases 0.537%, 1.209%, 2.384%, 0.369%, 1.104% and 2.943% respectively. Luminous flux decreases 1.474%, 4.855%, 7.493%, 2.073%, 3.859% and 7.793% respectively. Optical efficiency also decreases 2.527%, 4.617%, 6.671%, 2.171%, 4.903% and 7.579%. The experiments show that LED optical performances are directly influenced by electric current and lighting time.

Based on the concentration equation of smoke screen onflow diffusion, the basic characteristics of smoke cloud onflow motion are analyzed. And the motion characteristics and diffusion trends of several kinds of smoke material smoked at near-ground are analyzed through the experiments at the states of smoke grenade static explosion and smoke generator spraying in order to build the relationships among smoke source characteristic parameters, atmosphere environment and effect parameters through determining diffusion variance and coefficient at a certain experimental condition in the future and the practical application to evaluate the performances such as smoke screen shield and airborne endurance.

In bilateral total variation regularization method(BTV), considering geometric distance and gray level similarity of the center pixel and the surrounding pixels, the method to get better reconstruction quality than Tikhonov regularization method and total variation regularization method (TV) is obtained. However, in BTV method, the regularization parameter λ is a fixed value, so the method cannot maintain the image edge texture information and suppress image noise at the same time. In order to solve this problem, an adaptive regularization reconstruction algorithm for image local texture feature is proposed, and based on gray level co-occurrence matrix(GLCM), the image local texture feature is extracted, the function relationship of regularization parameters and image local texture feature is established, so regularization parameter λ is adjusted adaptively according to image local texture feature. The experimental results show that compared with BTV, this algorithm can better reconstruct the image edge texture details and suppress the noise effectively.

An improved algorithm based on mean-shift for target tracking is proposed in order to overcome the problem of tracking point shift, which comes from partial similarity between target and its background due to lack of color information in the gray images. The contrast mean difference feature, average gradient feature and gray level probability feature of the target are added to the target histogram. The particle filtering is applied to enhance the stability and accuracy for tracking the target in the gray images. The experiment shows that the algorithm can better adapt to the complex background of the moving target, and improves the robustness and accuracy of the algorithm.

Based on image processing, the image non-uniformity testing method is proposed as the reference to determine whether the infrared imaging equipment in normal operation or not. The images from the standard infrared imaging equipment are taken as standard images. Under the same testing condition, the infrared imaging equipment to be tested is used to capture infrared images, the difference with the standard images is made, and the difference images are performed through binaryzation processing and the standard deviation of the equipment is deduced. According to Romanowski criterion, non-uniformity determination criterion of the infrared imaging equipment is established. The standard deviation of the equipment to be tested is used to determine whether the equipment has non-uniformity or not.

The interacting multiple model particle filter which combined by interacting multiple model and particle filter is applied in tracking maneuvering target. In order to analyze the performances of the interacting multiple model particle filter algorithm in the acoustic source tracking, the principle of the interacting multiple model particle filter algorithm is introduced at first. And then, the key parameters used in the algorithm are analyzed and the improved algorithm is concluded. Finally, the application of interacting multiple model particle filter in acoustic source tracking is simulated and the future research directions are pointed out.

The fault diagnosis of the aerocamera can only judge to system level and the detailed fault elements cannot be diagnosed. To resolve the problem, based on the research of the operation principle of aerocamera auto-focusing system, the fault principle is analyzed according to the measurement and control flow-sheet of aerocamera auto-focusing system. The detailed elements possible producing fault such as stroke switch, high accuracy position sensor, driver, electric motor, RS422 communication and communication request are studied in detail. And the fault diagnosis system is built to complete the detailed elements diagnosis for CCD aerocamera auto-focusing system.

Silicon photomultiplier tubes (SiPM) is a new type of photoelectric detector, which has the advantages, such as high gain, high sensitivity, low bias voltage, insensitive to magnetic field and compact structure. The adapter circuit of SiPM is researched and designed, which includes a power supply and transimpedance amplifier circuits. Simulation software is used to simulate the designed circuits. And the structural parameters of the circuits are optimized. Finally, the adapter circuit is made and the test results show that the adapter circuit has a good output response to 100 kHz optical signal, output amplitude reaches volt level, which meets the design requirements.

According to the testing requirements of performance detection and faults location, a design method of the detection instrument of the stepping motor controller is introduced. And the detection to the controller state, rotatory angle and time of the stepping motor is realized. The hardware based on single chip microcomputer AT89C52 and the software design based on C51 language are presented.

PM2.5 detection system based on light scattering method has the advantages, such as simple principle, simple data acquisition and processing and accurate measurement results, so it is one of the main methods of PM2.5 detection. Modularization design is adopted in PM2.5 detection system which is composed of four parts such as photoelectric acquisition, control and processing, display and warning and power modules. And PM2.5 monitoring and warning in real-time are realized. Proteus simulation results show that the system has accurate detection ability and the error is within the range of control. After hardware debugging and testing of the system, the PM2.5 particles number can be displayed in real time. When the particles number reaches a predetermined value, the buzzer warns.

An indirect measurement method for natural ground feature laser reflection characteristics is proposed based on bidirectional reflection ratio coefficient theory. A laser detector at different angles is used to collect the response amplitude data of 1.06 μm laser to the chosen natural ground feature and diffuse reflection board at the same position. The ratio value is calculated to obtain the bidirectional reflection ratio coefficient of the ground feature at different angles and the reflection characteristics of different ground feature to laser is reflected indirectly. And the method can be used to test the bidirectional reflection ratios of weed, red soil and weathering rock. The engineering application feasibility of the method is verified by experiments.

Satellite tool kit (STK) is an important tool to simulate and analyze satellite system in the field of aerospace, which can satisfy the requirements of satellite 2D/3D visual simulation. The orbit model and satellite constellation configuration of the spacecraft are researched. The visual function of STK is used to demonstrate the running condition of the spacecraft on orbit. The report creating function of STK is used to create visual report of the target from the spacecraft and the accurate orbit of the spacecraft is predicted. The simulation system is built finally and the simulation result is proposed.

The shell capacitive electronic manometer with internal trigger has some shortcomings, such as error trigger and no trigger, complicated plug line communication and communication socket easy to be worn. According to the shortcomings, the shell capacitive manometer and infrared communication for capacitive manometer is designed. The high strength transparent shield window and photoelectric trigger circuit are designed to ensure the manometer with light energy trigger to collect and storage pressure signals in a testing field. And the electromagnetic interference affected to the testing circuit is shielded. The infrared communication interface is designed. The normal communication between the manometer and the host computer is realized. Test experiments show that the improved manometer can operate reliably.

The area target electronic protection system is a kind of countermeasure system composed of multi-threat sources and countermeasure equipments. According to threat analysis, operational modes, environment and the influence, combat effectiveness evaluation is performed to determine system tasks, and the survivability of the area target is evaluated. And then, the experiment and simulation results are used to verify and revise the model.

With the development of microelectronics, optoelectronics, solar photovoltaic technology and the integration of optics and electronics and increasingly fierce competition in domestic and foreign market, advanced manufacturing technology of aspheric optical components is increasingly becoming an important manifestation of a country's manufacturing capability. It is the constant pursuit goal to develop new aspheric processing technology, improve processing accuracy and efficiency and reduce the aspheric processing cost. The techniques parameters such as grinding process, polishing process and polishing equipment for fabrication technology of Φ76.2 mm aspheric lens are researched. Two-step polishing method combined with elastic model pre-polishing and corrective polishing with small tool is used to polish accessory surface quickly. A set of standard numerical control processing technology for aspheric surface is introduced, and the influencing factors are analyzed.

The measurement method of bearing inner ring radial runout and the installation methods of paired bearings are introduced. By comparing and analyzing the two installation modes of both in the same and opposite directions of radial runout of the paired bearings, it is concluded that when the bearing is installed in the same direction of radial runout, the translation error of axis is increased to reduce the shaking error of the shafting system. So the effect of compensating shafting system error is obtained and the rotation accuracy of the shafting system is improved. After the errors of Class P5 paired bearings are compensated, the maximum shaking error of the shafting system is 2.45 second of arc.