Xian Institute of Applied Optics

Fengcheng, China

Xian Institute of Applied Optics

Fengcheng, China
SEARCH FILTERS
Time filter
Source Type

Yang A.,Xian Institute of Applied Optics | Zhang J.,Xian Institute of Applied Optics | Li G.,Xian Institute of Applied Optics | Zhang W.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2015

Aiming at the special technique requests of directed infrared countermeasure systems for mid-wave infrared (MWIR) lasers in laser wavelength, power, divergence, repetition frequency and modulation pattern, the technique characteristics and present developing situation of the optically pumped semiconductor disk laser, the quantum cascade laser, the optical-parametric-oscillator-based solid-state laser and fiber laser were analyzed.The characteristics and new developments of the birefringent phase matching and the quasi-phase matching were also summarized. A technique project of MWIR lasers was proposed by using a solid-state laser or a fiber laser with the wavelength of 1 064 nm and high power good beam quality to pump an optical parametric oscillator based on the crystal of periodically poled lithium niobate with MgO-doping(PPMgLN).The converting efficiency above 16% on wavelength could be obtained. ©, 2015, The No. 205 Research Institute of China Ordnance Industry. All right reserved.


Yao D.,Xian Institute of Applied Optics | Wang N.,Xian Institute of Applied Optics | Kang W.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2015

A kind of linearization double-linkage continuous zoom lens was proposed. This system utilized the simplified configuration of the conventional double-linkage continuous zoom optic system with mechanical compensation, its zoom group and compensation group both used linear motion, and the zooming cam mechanism for controlling the curvilinear motion discipline of zoom group was omitted. This configuration had a few image displacement, however, it could not influence the image quality when the image displacement was controlled in allowed range. In addition, the principle and method for designing linearization double-linkage zoom lens were given. ©, 2015, The No. 205 Research Institute of China Ordnance Industry. All right reserved.


Yang L.,Xi'an Technological University | Xie H.,Xian Institute of Applied Optics | Su J.,Xi'an Technological University
Journal of Applied Optics | Year: 2014

The determination method of laser damage of thin film and the evaluation method of damage threshold are indispensable for enhancing anti-laser ability of infrared system observation window and its operating performance. The damage characteristics and mechanism of film by pulse laser induced damage were researched. The experiments used by YAG pulsed laser for TiO2 thin film were offered for 1-on-1 way of laser induced. By using the two images taken from charge coupled device (CCD) before and after laser illumination, the matching of the damaged image and the undamaged image was realized, and the difference image measure algorithm was established. The experiments conclude that the different energy measures of TiO2 thin film samples can identify the damage situation: the measure value M<0.1, no damage; 0.10.5, serious injuries. The roughness of thin film samples irradiated by the laser with the energy density of 0.5 J/cm2 increases obviously. The results show that the method of image matching test before and after laser irradiation can realize discrimination of laser-induced film damage. ©, 2014, The No.205 Research Institute of China Ordnance Industry. All right reserved.


Li Y.,Xian Institute of Applied Optics | Gao J.-B.,Xian Institute of Applied Optics | Meng H.-M.,Xian Institute of Applied Optics | Zhang L.,Xian Institute of Applied Optics | Zhang M.-X.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2014

In the realtime remote sensing of gas based on inteferogram imaging, fast inversion processing of original data is required. But the data acquired in this way is a large quantity, and the inverse algorithm is also complicated while using CPU for processing is time-consuming. A parallel inversion algorithm using compute unified device architecture (CUDA) was realized by analyzing the patten of data obtained by time-space mix-modulation long-wave infrared interference spectrometer. The results show that the parallel computing technique using CUDA can enhance the efficiency of spectrum inversion by 5 to 20 times, which provides foundations for further application like spectral recognition.


Liu Y.,Xian Institute of Applied Optics | Guo C.,Xian Institute of Applied Optics | Ru Z.-B.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2014

A design of a 3rd generation image intensifying charged-coupled device camera (ICCD) was proposed that could operate under high-speed gating. A gated control circuit was designed which was used for the photocathode of a 3rd generation image tube, so that the ICCD could image effectively under a high-speed gated state. After analysis and comparison, a relay lens was designed which had a Bi-Gauss complication optic configuration. The high transmissivity and high modulated transfer function (MTF) were achieved on image coupling. A digital CCD and a digital frame capture circuit with an embedded image process module were used. The correlative software about the image process was accomplished, so that the image of ICCD was presented fast. As a result of the design, the 3rd gated ICCD can operate with a 3.3 ns gated width and its spatial resolution is 600 TVL.


Qu J.-R.,Xian Institute of Applied Optics | Wang X.-Q.,Xian Institute of Applied Optics | Duan H.-J.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2014

Aiming at the photoelectronic tracking system marched weapon systems, we expounded the considerations for its demonstration and design, discussed the selection principle for the detector of the optoelectronic tracking system as well as the advantages/disadvantages of the T-model and U-model structures from the actual situations. Moreover we analyzed the main factors determining the critical indicators such as tracking distance, tracking precision, response speed and working scope. Corresponding to the critical indicators, we also determined the factors influencing the indicators of EO system inside. Furthermore we proposed some related techniques, including guiding interception function, relationship among optical axes, and so on.


Yang H.-C.,Xian Institute of Applied Optics | Wang Z.-L.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2013

The aiming axis could affect the angle measurement accuracy of panoramic periscopic system. According to the typical opto-mechanical structure of the panoramic periscopic system, the error sources of aiming axis precision were analyzed. The calculation model was established by using the vector reflection theory and rotation principle, and the influence of azimuth axis, pitch axis, optical axis and reflector errors on the aiming axis was provided clearly. Meanwhile, the corresponding adjustment scheme was determined, each control point in the adjusting process was made clearly, and the debugging and testing methods were also determined. The test results show that the aiming axis accuracy is up to 0.1 mrad.


Xu R.-G.,Xian Institute of Applied Optics | Wang L.,Xian Institute of Applied Optics | Yin W.-H.,Xian Institute of Applied Optics | Yang Z.-J.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2013

A new transmittance measurement and assessment method of the infrared optical material at diffident temperatures was proposed. A collimation reflect mirror was used to make the infrared light source into the parallel light, and then a chopper was used to make the continuous light into the pulse light, besides, a special wavelength was obtained by filter. A special data acquisition system that including a preamplifier circuit, a lock-in amplifier, a computer and a control software could calculate the value of infrared transmittance and give the temperature coefficient of the optical material by means of double light beam contrast measurement. The method resolved problems of infrared transmittance measurement of optical material in actual operational environment, like high temperature. Test result shows the transmittance of sapphire material is higher than 10% at the wavelength of 519 5 nm, and the repeatability is better that 0.2% from room temperature up to 700°C. The method has great economic and social utility.


Ji X.-H.,Xi'an Technological University | Yang L.,Xi'an Technological University | Jiang L.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2013

To calibrate the optical axis consistence of airborne multi-spectral and multi-axial optoelectronic tracking device fast and accurately, a calibration system for the consistence of optical axis based on Cassegrain optical system was designed. This system used halogen lights as the visible light source, blackbody as the infrared light source, and ZnS reticle was adopted to provide infinite object. The aperture of the system was 200 mm, and the focal length was 1500 mm. The emergent beam parallelism of points on the axis was better than 10″, satisfying the demand of 1' in the test of consistence of multi-optical axis and multi-spectrum system.


Yang H.,Xian Institute of Applied Optics | Kang D.-K.,Xian Institute of Applied Optics | Jiang C.-L.,Xian Institute of Applied Optics
Journal of Applied Optics | Year: 2013

The optical transfer function (OTF) is an important parameter of image quality for optical system. As modern OTF measurement equipments just covered visible light and infrared band, the ultraviolet OTF (260 nm~400 nm) measurement equipment was designed. The theory and the components of the testing equipment were introduced. The equipment was calibrated by the OTF standard lens with centric wavelengths of 300 nm and 380 nm. The results show that the errors between theory and measurement of MTF are ±0.03 (on-axis) and ±0.05 (off-axis). Finally, the uncertainty of equipment measurement is evaluated.

Loading Xian Institute of Applied Optics collaborators
Loading Xian Institute of Applied Optics collaborators