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Zhang X.-J.,Changchun University of Science and Technology | Zhang G.-Y.,Changchun University of Science and Technology | Zhang G.-Y.,Jilin Province Engineering Research Center | Sun G.-F.,Changchun University of Science and Technology | And 2 more authors.
Guangzi Xuebao/Acta Photonica Sinica | Year: 2014

A scheme of star simulator spectrum simulation based on mixed light source of xenon lamp and halogen tungsten lamp for foundation was proposed. The wide spectrum light source array was composed of xenon lamp and halogen lamp. After color temperature simulation and module controlling, the light entered into the integrating sphere to provide ideal light source for star simulator, and spectral curves were stimulated at specific color temperatures of nearly 3900 K, 4800 K, 6500 K. Through the simulation of the blackbody spectrum curve of standard, the optimal transmission rate was calculated for each band filter, and the transmission rate of interval in tiny brand was combined for getting the transmission rate which satisfied the design index. The simulation results showed that, by using the proposed scheme, the small band matching simulation error would be less than 10%, with the relative area method verification matching error is within 4%, and this scheme provides an effective method for the star simulator to simulate spectral curves of the specific color temperatures.


Zhang X.,Changchun University of Science and Technology | Zhang G.,Changchun University of Science and Technology | Zhang G.,Jilin Province Engineering Research Center | Zhang J.,Changchun University of Science and Technology
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

In order to meet the requirements of multi-color temperature, high precision and wide spectrum, a large number of LED in different colors are used as internal light source for an integrating sphere. An asymmetric Gaussian function model is established to realize non-uniform spectral peak intervals. The research aims to find the desired spectral distribution of LED and the number in use through specific properties of the target spectrum to improve the obtained original fitting model. Simulation of spectral curve of specific color temperature can be realized through the simulation of standard blackbody spectral curve. The result shows that matching simulation error for small band is within 12%, and matching error verified by relative area method is within 4.63%. © 2013 Copyright SPIE.


Zhang X.,Changchun University of Science and Technology | Zhang G.,Changchun University of Science and Technology | Zhang G.,Jilin Province Engineering Research Center | Sun G.,Changchun University of Science and Technology | And 6 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2013

A calibration method of a large field LCOS splicing star simulator as well as the structure and principle of the calibration system were introduced. In order to make the star simulator to obtain a larger width of the field of view, proposing the connection technique of two LCOS was proposed. A variety of splicing errors were analyzed and then the calibration method was gave out. The focal length measurement error, distortion error and the imaging relationship error brought by the spliced LCOS were analyzed, a mathematical model of the angular distance between stars was established. Moreover, the various parameters of the model under the optimal accuracy were calculated by using a large number of the measurement data. Experimental result shows that, after calibration, the accuracy of angular distance between stars from the star simulator is significantly improved and the measurement error is better than 20″.


Liu S.,Changchun University of Science and Technology | Liu S.,Jilin Province Engineering Research Center | Zhang G.-Y.,Changchun University of Science and Technology | Zhang G.-Y.,Jilin Province Engineering Research Center | And 5 more authors.
Guangzi Xuebao/Acta Photonica Sinica | Year: 2015

In order to meet the requirements of observations of the moon as its target by navigation sensors and rendezvous and docking sensor, the moon simulator with large diameter and high irradiation uniformity was designed, the effective irradiation area is Φ2000 mm. Using LightTools software, the phases, radiance and uniformity of the moon simulator were designed, simulated and analyzed by modeling and tracing method. The phases of the moon and radiance control system was designed to control the 14 typical phases and radiance of the moon in real time. The radiance correction method of the LED array was put forward to improve the uniformity of the simulator. The test results show that the irradiation uniformity of the simulator is better than 15.7% after correction. It indicated that the simulator can be used as the target for sensor identification. ©, 2015, Chinese Optical Society. All right reserved.


Sun G.-F.,Changchun University of Science and Technology | Zhang G.-Y.,Changchun University of Science and Technology | Zhang G.-Y.,Jilin Province Engineering Research Center | Wang L.-Y.,Changchun University of Science and Technology | And 7 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

In order to carry out on site calibration and accuracy test of a high accuracy star sensor, a type of compact very high accuracy star simulator system is needed, and its accuracy should be less than 0.2″. Firstly, we should study on the optical system with high imaging precision. Then, put a high-precision and large size star board on the star display system, in a static form to simulate dynamic star map. Finally, we should design the structure for star simulator according to parameters of optical system, to ensure installation accuracy and reliability of lens. The result shows that all of design indexes meet the requirement, and accuracy better than 0.2″, so star simulator proposed in this paper is satisfied for on site calibration and accuracy test of the high accuracy star sensor. © 2012 SPIE.


Meng Y.,Changchun University of Science and Technology | Zhang G.-Y.,Changchun University of Science and Technology | Zhang G.-Y.,Jilin Province Engineering Research Center
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2015

Star simulator acts ground calibration equipment of the star sensor, It testes the related parameters and performance of the star sensor. At present, when the dynamic star simulator based on LCOS splicing is identified by the star sensor, there is a major problem which is the poor LCOS contrast. In this paper, we analysis the cause of LC OS stray light, which is the relation between the incident angle of light and contrast ratio and set up the function relationship between the angle and the irradiance of the stray light. According to this relationship, we propose a scheme that we control the incident angle. It is a popular method to use the compound parabolic concentrator (CPC), although it can control any angle what we want in theory, in fact, we usually use it above ±15° because of the length and the manufacturing cost. Then I set a telescopic system in front of the CPC, that principle is the same as the laser beam expander. We simulate the CPC with the Tracepro, it simulate the exit surface irradiance. The telescopic system should be designed by the ZEMAX because of the chromatic aberration correction. As a result, we get a collimating light source which the viewing angle is less than ±5° and the area of uniform irradiation surface is greater than 20mm×20mm. © COPYRIGHT SPIE 2015.


Zhang J.,Changchun University of Science and Technology | Zhang G.-Y.,Changchun University of Science and Technology | Zhang G.-Y.,Jilin Province Engineering Research Center
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2015

With continuous development of the key technologies of star sensor, the precision of star simulator have been to be further improved, for it directly affects the accuracy of star sensor laboratory calibration. For improving the accuracy level of the star simulator, a theoretical accuracy analysis model need to be proposed. According the ideal imaging model of star simulator, the theoretical accuracy analysis model can be established. Based on theoretically analyzing the theoretical accuracy analysis model we can get that the starlight emergent angle deviation is primarily affected by star position deviation, main point position deviation, focal length deviation, distortion deviation and object plane tilt deviation. Based on the above affecting factors, a comprehensive deviation model can be established. According to the model, the formula of each factors deviation model separately and the comprehensive deviation model can be summarized and concluded out. By analyzing the properties of each factors deviation model and the comprehensive deviation model formula, concluding the characteristics of each factors respectively and the weight relationship among them. According the result of analysis of the comprehensive deviation model, a reasonable designing indexes can be given by considering the star simulator optical system requirements and the precision of machining and adjustment. So, starlight emergence angle error analysis of star simulator is very significant to guide the direction of determining and demonstrating the index of star simulator, analyzing and compensating the error of star simulator for improving the accuracy of star simulator and establishing a theoretical basis for further improving the starlight angle precision of the star simulator can effectively solve the problem. © 2015 SPIE.


Sun G.,Changchun University of Science and Technology | Zhang G.,Changchun University of Science and Technology | Zhang G.,Jilin Province Engineering Research Center | Gao Y.,CAS Changchun Institute of Optics and Fine Mechanics and Physics | And 7 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2013

In order to realize the ground calibration tests of star sensors, a ground calibration system of large field of view and high angular distance between stars' simulation accuracy was designed, the composition of calibration system, optical system design and simulation precision were studied. According star sensors ground calibration requirements the system components was introduced, a method to realize the angular distance between stars' simulation precision better than that of 20″ was put forward. Using the new display LCOS as star chart display, the image plane field by splicing methods was expanded, and Zemax software was used to design the optical system accordingly. On the basis of the original measuring method, the evaluation method of ground calibration equipment precision was given. And a way was proposed to improve the angular distance between stars' simulation accuracy by the method of star correction. The experimental results show that the star sensor ground calibration equipment of the angular distance between stars' simulation precision is less than 20″, meet the star sensor for ground calibration test requirements.


Sun G.-F.,Changchun University of Science and Technology | Sun G.-F.,Jilin Province Engineering Research Center | Zhang G.-Y.,Changchun University of Science and Technology | Zhang G.-Y.,Jilin Province Engineering Research Center | And 5 more authors.
Guangzi Xuebao/Acta Photonica Sinica | Year: 2015

A multifunctional optical system for solar simulators, which could achieve collimating and divergent sunlight simulation simultaneously, was designed. The design of condensers used in the optical system, and the optimization techniques of optical integrators were described. The parameters of the optical integrator was optimized with both the sequential and non-sequential functions of Zemax software. Also the collimator objective was designed. According to the analog simulation results of the optical system with LightTools, when the collimating sunlight simulation was achieved in the designed optical system, the irradiated surface reached Φ300 mm, and the irradiation nonuniformity superior to ± 6.1%; when the divergent sunlight simulation was achieved by changing the position of collimator objective, the irradiated surface could reach Φ1500 mm and the irradiation nonuniformity superior to ± 6.7%. ©, 2015, Chinese Optical Society. All right reserved.


Sun G.,Changchun University of Science and Technology | Sun G.,Jilin Province Engineering Research Center | Zhang G.,Changchun University of Science and Technology | Zhang G.,Jilin Province Engineering Research Center | And 9 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2015

In order to meet the star sensor ground calibration and testing, a set of high-precision variable star chart background star map simulator was designed, the precision angular distance between the star of this system was required better than 10". Static targets with high precision was made as the standard source core device of star map simulator, matching with a brightness controlled lighting system to fulfill star point and background simulation in the same time, designing collimating optical system that males parallel light outgoing analog star chart and background, a star map was displayed at the pupil of star sensor, to achieve background controllable and high accuracy star chart position simulation. Finally, a method to improve the accuracy of the simulation star point was brought out, star point position accuracy was measured by using theodolite matching with the brightness tested of the background by light meter test. The experiments results show that, the star map simulation accuracy of the simulator is better than 10", can achieve the background brightness adjustment 26 times, and be used for high-precision star sensor ground calibration and accuracy testing. ©, 2015, Chinese Society of Astronautics. All right reserved.

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