A novel hyperbolic-circular flexure hinge was presented. According to the Castigliano′s second theorem, the compliance calculations of the flexure hinge were derived. From the deduced equations, the effects of radius, minimum thic

To research the technology of displacement sensing based on near-infrared microscopic interferometry in spectral domain, the impact of fringe carrier on extracting displacement is analyzed, the formula of spectral central waveleng

To measure accurately dynamic thermal focus length of laser crystal in solid state laser, a new and accurate method for measuring dynamic thermal focus length by means of the indicator light polarization converted was presented in

A high precision laser screen dispersion measurement method based on the line laser parallel detector array composite was presented to solve the difficulty of barrage weapons location dispersion test. The principle of measuring sh

According to the problem of disturbance rejection rate(DRR) within strapdown imaging seeker due to different scales and dynamic error between sensors of missile, the mechanism of DRR was expounded, and the methods of estimating th

In order to reduce the transmission loss, strengthen the medium loaded plasma waveguide mode field constraint and optimize the plasma waveguide transmission performance, a further research on waveguide transmission characteristics

Total-internal-reflection(TIR) concentrator for solar concentration was designed, and a series of measures was adopted to optimize. Then lots of TIR concentrators was superimposed and assembled on the waveguide slab to form the wa

The design of the radio frequency attenuator was based on the MEMS switch. First of all, the basic structure of the electronic circuit was presented with CPW as the transmission line, the contact MEMS switch as the controller and

Space-borne laser ranging could measure the distance between laser range finder and detection target through the transmitter emitted by a high degree of stability of laser pulse, which related to the design and application of lase

Existing laser warning based on the diffraction grating has the following disadvantages. The diffraction efficiencies of ±1 order based on sinusoidal grating are low and the diffraction efficiencies of -1 order and 0 order based o

Head mounted display (HMD) as a kind of visual systems requires a large field of view (FOV), a large exit pupil distance, a small volume, and light in weight. In order to meet these requirements, a compact two-mirror structure and

An off-axis three-mirror system with large linear field of view was designed. The system is with a focal length of 1 200 mm, a F-number of 12, a linear field of view of 30°×1°. In the system, x-y polynomial freeform surface was ap

A visible infrared integrated optical system of a large field of view is designed by using optical software, and the FOVs of the visible system and infrared system are 5.2 degrees and 5.12 degrees respectively. The orbit of the sy

Rhomboid micro stroke amplifier was designed in order to raise the tilting range of fast steering mirror driven by piezoelectric. Firstly, the theory of stroke amplifier was expounded and the key factors were analyzed with the hel

To achieve dynamic performance improvement of the cross-spring compliant micro-displacement magnifying mechanism(CMDMM), response surface methodology(RSM) was used to optimize the structure parameters for multi-objective analysis.

Highly integrated TDI CCD focal plane system was proposed, the thick-film integrated module of TDI CCD driving unit is applied successfully in the domestic. The research was finished on highly integrated high-speed and multi-spect

When a planar optical wavefront is made to propagate through a supersonic turbulent boundary, affected by the density fluctuation, its propagation direction and phase will change, which make target image blur, shifting, jitter et

For the random vibration response of a micro satellite loaded antenna and S-flywheel supporting structure does not meet the criteria for system design of the micro-satellite based on integrated design concept, a co-supporting stru

A new absolute calibration method based on the parametric down-conversion was introduced. In the parametric down-conversion process, two correlated-photons were produced whose wavelengths were 0.631 μm and 3.39 μm, the average pho

Adequate IR data set are essential to design the algorithms of ballistic targets detection, trace and recognition. In traditional IR image stimulations, the systems often emphasize optical imaging research of some specific scenari

Measure body surface temperature with uncooled infrared thermal imager has many features such as fast, non-contact, short scope of measurement and higher accuracy requirement. But temperature of core and environment will interfere

The modeling and optimizing of fuse and warhead coordination of combination laser proximity fuze, which detects a warship target with ship-borne radar, were discussed. By means of building the 3D model of warship and the detecting

Laser pulse encoding of laser semi-active guided weapon is an important measure to resist the laser decoy jamming. To a certain extent, existing laser pulse encoding methods have regularity, are identified and cracked by jamming s

The Coptis chinensis is one of the traditional Chinese medicine, which has the property of clearing heat and expelling toxi. It has the strong enrichment effect on the heavy metal during the growth process. In order to quickly ide

The ultrasonic surface wave induced by the laser shock processing and its propagation in half-space elastic plate with micro crack were simulated with Abaqus software based on equivalent load method, and the effects of the size of

In order to improve the wear performance of 304 stainless steel, a method of laser shock processing(LSP) was put forward. The microstructure and performances of 304 stainless steel which are treated with and without laser shock pe

Synthetic aperture ladar is a generalization of the synthetic aperture technique in the field of laser coherent detection with a higher resolution compared to the conventional synthetic aperture ladar.Compared with airborne and gr

The near-space wind measurement is important to atmospheric dynamics, numerical weather prediction and guarantee of aerospace system. A 60 km Rayleigh Doppler lidar was developed to measure the wind of near space. This lidar was b

According to the characteristics of high speed scanning of laser beam of the optical waveguide phased array, a staring single aperture, direct detection of the receiving system was designed with a linear APD array for target detec

The sporadic sodium layers(SSL) caused by atmospheric gravity waves over Langfang(39°N, 116°E) is studied by using the sodium fluorescence Doppler lidar and the meteor radar detection data of the near space environment comprehensi

The imaging lidar has some advantages such as long detect distance, high frequency, narrow wave, high precision of distance and angle and less influence of illumination. So the imaging lidar is applied more and more in space. The

In the existing automatic focusing systems, the traditional evaluation functions are sensitive to noise and have small focusing range which will affect the accuracy of the auto-focusing results. An autofocus evaluation function ba

In order to realize real-time and accurate detection of water turbidity in the water treatment process, the turbidity detection system was designed based on infrared light scattering and the turbidity forecasting model was put for

For the feature extraction methods of hyperspectral remote sensing data, a new method, called supervised neighbor reconstruction analysis(SNRA), was proposed. First, this method reconstructs each point with neighbor points from th

Terahertz(THz) wave generation by organic crystal 2-[3-(4-hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene]malononitrile(OH1) with a collinear phase-matching scheme based on cascaded difference frequency generation(DFG) processes w

Single-frequency distributed Bragg reflector(DBR) fiber lasers were systematically investigated with rare-earth-doped silica fibers. The commercial Nd3+, Yb3+, Er3+/Yb3+ and Tm3+-doped silica fibers were applied in this demonstrat

Imaging lidars, operating at an active imaging approach, are capable of obtaining high resolution 3D images of objects at far distance even under low illuminance and complicated background conditions, thus it has been an inevitabl

Multi-grain diamond grits were prepared through binding micro diamond particles with binder. SEM(Scanning Electron Microscope) was adopted to observe their microscopic morphology, and both multi-grain diamond grits and single diam

In order to research the surface thermal stress in Sapphire/AlN/GaN epilayer and the stress influence factor, the surface stress in materials with diameter of 40 mm were respectively calculated and studied by the finite element mo

Many computer vision algorithms need to measure the scene radiance accurately, and the camera response function can achieve this result by establishing the mapping between image brightness and scene radiance. Camera response funct

Aiming at improving the PIR array′s detectivity and perception, reducing the domain in detect cost, a PIR single node array was put forward to push the target trajectory. In order to simplify the structure, only four dual pyroelec

The numerical model of correlation wave-front sensing algorithm (COR) based adaptive optics (AO) system was established. Collimated uplink propagation beam corrected by AO was numerically simulated. The influence of photon noise a