Jilin Dongguang Precision Machinery Factory

Jilin, China

Jilin Dongguang Precision Machinery Factory

Jilin, China
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Xiao Z.-J.,Changchun University of Science and Technology | Zhu H.-B.,JiLin Dongguang Precision Machinery Factory | Xu Z.-G.,JiLin Dongguang Precision Machinery Factory
Guangzi Xuebao/Acta Photonica Sinica | Year: 2016

According to the requirements of focusing accuracy and the imaging characteristics of the CCD camera, an automatic focusing system of aerial camera which is based on image processing technology was proposed. It was based on the self-made resolution target, the image sharpness function and the optimized mountain climbing algorithm. The calibration of the aerial camera's defocusing amount caused by temperature and atmospheric pressure were realized by using the self collimation and the defocusing compensation method. Through the introduction of aircraft altitude data to calculate the defocusing amount and the correction were achieved by using the self collimation focusing technology. The automatic focusing test experiment was carried out and the results show that, the system can satisfy the requirements of fast and high precision focusing of the aerial camera, the calibration error is less than 1/2 depth of the camera. © 2016, Science Press. All right reserved.


Ma C.,Changchun University of Science and Technology | Gong P.,Changchun University of Science and Technology | Fu Y.,Changchun University of Science and Technology | Sun Y.,Changchun University of Science and Technology | And 2 more authors.
Optik | Year: 2017

For large aperture complex optical wavefront sensing, the lenticule array of Hartmann-Shack wavefront sensor limits the sampling of the wavefront. Thus the accuracy of wavefront reconstruction is affected. In order to improve the sampling rate of wavefront, the detection method of micro-scanning technology which added in Hartmann-Shack wavefront sensing method is proposed. Based on the results of simulation analysis, the dual-wedge micro-scanning Hartmann sensor is designed. The experiment which 2 × 2 mode dual-wedge micro-scanning Hartmann-Shack sensor detects the wavefront of telescope optical system is set up. The experimental results are compared with the ZYGO interferometer. The results of dual-wedge micro-scanning Hartmann-Shack sensor are better than that of the traditional sensor. Conclusions show that the micro-scanning technology has a certain effect on the improvement of the wavefront reconstruction accuracy of Hartmann-Shack sensor. © 2016 Elsevier GmbH


Fu X.-H.,Changchun University of Science and Technology | Xiong S.-F.,Changchun University of Science and Technology | Kou Y.,Changchun University of Science and Technology | Pan Y.-G.,Changchun University of Science and Technology | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

With the rapid development of optical testing technology, laser heterodyne interferometer has been used more and more widely. As the testing precision requirements continue to increase, the technical prism is an important component of heterodyne interference. The research utilizing thin film technology to improve optical performance of interferometer has been a new focus. In the article, based on the use requirements of interferometer beam splitting prism, select Ta2O5 and SiO2 as high and low refractive index materials respectively, deposit on substrate K9. With the help of TFCalc design software and Needle method, adopting electron gun evaporation and ion assisted deposition, the beam splitting prism is prepared successfully and the ratio of transmittance and reflectance for this beam splitting prism in 500∼850 nm band, incident angle 45 degree is 8:2. After repeated tests, solved the difference problem of film deposition process parameters,controlled thickness monitoring precision effectively and finally prepared the ideal beam splitting prism which is high adhesion and stable optics properties. The film the laser induced damage threshold and it meet the requirements of heterodyne interferometer for use. © 2014 SPIE.


Xiao Z.J.,Changchun University of Science and Technology | Guo X.X.,Changchun University of Science and Technology | Zhu H.B.,JiLin Dongguang Precision Machinery Factory | Xu Z.G.,JiLin Dongguang Precision Machinery Factory | An Z.Y.,Changchun University of Science and Technology
Advanced Materials Research | Year: 2014

In view of characteristics owned by high and low gimbals, for instance pure lag, large inertia, strongly nonlinear and so on, which was employed in low light level (LLL) weapon sight reliability detection system. The basic working principle and mathematical model of Dahlin and Smith predictive control algorithm were mainly researched. And ideal control curves were obtained by software emulation. The simulated results showed that the two algorithms each have their advantages, shortcomings and the proper situations, but as to improve the control efficiency of system, the Dahlin is superior. © (2014) Trans Tech Publications, Switzerland.


Xiao Z.-J.,Changchun University of Science and Technology | Guo X.-X.,Changchun University of Science and Technology | Zhu H.-B.,JiLin Dongguang Precision Machinery Factory | Xu Z.-G.,JiLin Dongguang Precision Machinery Factory | An Z.-Y.,Changchun University of Science and Technology
Guangzi Xuebao/Acta Photonica Sinica | Year: 2015

According to scene illumination under night sky radiation, when shooters were aiming and positioning at night, the illumination at the entrance pupil of the sight was calculated, and the generating device for infinite target simulation based on double-integrating-sphere in illumination-mode was designed in accordance with the illumination. Variable diaphragm applied to offer four switchable low light stress environments for the night vision device according to the principle of the integrating sphere, which was setting between the double-integrating-sphere. Meanwhile, for the sake of the maximum illumination could be received by the Low-Light-Level sight during the test, the installation position of the sight relative to collimator was analyzed. The results show that the three crucial factors which influenced the illumination at its entrance pupil are scilicet the clear aperture of the iris diaphragm setting between the double-integrating-sphere, the field of view of the collimator, and the installation position of the Low-Light-Level weapon sight apart from the collimator objective. Finally, the output illuminance of the integrating sphere and generating device were analyzed and calculated, the results of experiment and measuring showed that the illumination non-uniformity is <2%, which can meet the application requirements. ©, 2015, Chinese Optical Society. All right reserved.


Xiao Z.,Changchun University of Science and Technology | Han D.,Changchun University of Science and Technology | An Z.,Changchun University of Science and Technology | Zhu H.,Jilin Dongguang Precision Machinery Factory | Liu M.,Changchun University of Science and Technology
Guangxue Jishu/Optical Technique | Year: 2015

In view of the demand for large diameter measurement of shaft parts in the heavy mechanical industrial production, a new type of shaft diameter detection method with high efficiency and precision is researched based on double CCD measuring principle. The detection principle of system is introduced. For one single CCD has a shortcoming of small measurement of range, a detection method of diameter is proposed to measure large shaft (Φ150 mm~Φ300 mm) with double CCD sensors. The main error sources affecting accuracy are analyzed. In order to verify validity of the method with the measurement of 7 different standard shafts experiments show that the measuring accuracy is less than ±3 μm and the requirements of measuring large shaft diameter are met. ©, 2015, Editorial Board of Optical Technique. All right reserved.


Xiao Z.,Changchun University of Science and Technology | Guo X.,Changchun University of Science and Technology | Xia Y.,Changchun University of Science and Technology | An Z.,Changchun University of Science and Technology | And 2 more authors.
Optik | Year: 2014

A method for testing triaxial parallelism of optical sights, the triaxial which involve optical sights targeting axis of white & infrared and laser launching axis, is put forward in this paper on the basis of analyzing conventional measuring technique. At first, measuring optical path is improved, and some equipments such as aspherical mirror, high precision CCD camera are employed to eliminate the subjective error; with the analysis of the optical path, the mathematical model of triaxial parallelism is built, and the error factors are analyzed and calculated. Finally the system is calibrated by autocollimation theodolite whose accuracy is 0.5″ and the experimental results show that measurement error is <3″. In a word, the method has great significant engineering value. © 2014 Elsevier GmbH. All rights reserved.


Xiao Z.,Changchun University of Science and Technology | Guo X.,Changchun Architecture and Civil Engineering College | Zhu H.,JiLin Dongguang Precision Machinery Factory | Xu Z.,JiLin Dongguang Precision Machinery Factory | An Z.,Changchun University of Science and Technology
Optik | Year: 2016

The environmental adaptability is one of the key factors to evaluate the operational performance of low-light-level sight. In this paper double-integrating-sphere in illumination-mode combined with collimator was adopted to design a simulated generator of infinite target in order to provide four different level light stresses environment needed for detecting the adaptability for low-light-level sight. First of all, for the actual application of the low-light-level sight in aiming and positioning at night and midnight, the illumination at the entrance pupil of the sight was calculated. And then the double-integrating-sphere and collimator were designed in accordance with the illumination. Finally, the output illumination of integrating sphere and simulated generator for infinite target simulation were analyzed and calculated, the results of experiment and measuring showed that the illumination non-uniformity is less than 2%, which can satisfy the application requirements. © 2015 Elsevier GmbH.


Xiao Z.,Changchun University of Science and Technology | Han D.,Changchun University of Science and Technology | Zhu H.,JiLin Dongguang Precision Machinery Factory | Wang L.,Military Representative Room of Armored Forces in Changchun | Xu Z.,JiLin Dongguang Precision Machinery Factory
Optik | Year: 2016

According to accuracy requirements of aerial camera focusing and characteristics of CCD camera imaging, this paper proposed automatic focusing system of aerial camera based on image processing technology. Firstly, in accordance with self-made resolution target, image sharpness function and optimization of hill climbing algorithm, autocollimation defocusing compensation method was used to achieve correction of the aerial camera defocus caused by temperature and atmospheric pressure. Then the amount of defocus was calculated by introducing the aircraft height data, and defocus adjustment was realized by appropriate device. Finally, the experiment was carried out for simulating and testing of the system, and the results showed that: error of the system for camera defocusing correction is less than half of the camera focal depth, which can meet the requirements of the aerial camera, such as fast, high-precision focusing and so on. © 2015 Elsevier GmbH. All rights reserved.

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