Zhang Jiaying, Wang Hongjun, Zhu Xueliang, et al. Effect of speed of rotated diffuser on image quality of interference fringes[J]. Opto-Electronic Engineering, 2018, 45(1): 170492. doi: 10.12086/oee.2018.170492
Citation: Zhang Jiaying, Wang Hongjun, Zhu Xueliang, et al. Effect of speed of rotated diffuser on image quality of interference fringes[J]. Opto-Electronic Engineering, 2018, 45(1): 170492. doi: 10.12086/oee.2018.170492

Effect of speed of rotated diffuser on image quality of interference fringes

    Fund Project: Supported by the International Cooperation Project of the Ministry of Science and Technology(2015DFA10360)and the General Armament Department(JCKY2016208A001)
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  • Since the coherent noise affected the quality of the Fizeau's interferograms in the large aperture, the coherence of the beam was changed by rotated diffuser to reduce the noise of the interfering system. The relationships among the speed of the rotated diffuser, the contrast of the fringes and the SNR of the system were simulated. Then, the control parameters of rotated diffuser would be required in the optimum interference fringe. The interference images were obtained under different control parameters, and the fringe contrast and system SNR of each image were analyzed. The results showed that the contrast can be reduced by increasing the speed of the rotated diffuser in a certain extent, but the SNR can be improved effectively and it was convenient to process the interference image later.
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  • [1] 黄根旺. 菲索型移相式激光干涉仪研究[D]. 哈尔滨: 哈尔滨工业大学, 2011.

    Google Scholar

    Huang G W. Research on Fizeau phase-shifting laser interferometer[D]. Harbin: Harbin Institute of Technology, 2011.http://cdmd.cnki.com.cn/Article/CDMD-10213-1012002382.htm

    Google Scholar

    [2] 吴文. 吸波涂层目标相干与部分相干光LRCS研究[D]. 西安: 西安电子科技大学, 2014.

    Google Scholar

    Wu W. LRCS of absorbing coating target under coherent and partially coherent light[D]. Xi' an: Xidian University, 2014.http://cdmd.cnki.com.cn/Article/CDMD-10701-1014325148.htm

    Google Scholar

    [3] Pitter M C, See C W, Somekh M G. Full-field heterodyne interference microscope with spatially incoherent illumination[J]. Optics Letters, 2004, 29(11): 1200–1202. doi: 10.1364/OL.29.001200

    CrossRef Google Scholar

    [4] Morris M N, Naradikian M, Millerd J. Noise reduction in dynamic interferometry measurements[J]. Proceedings of SPIE, 2010, 7790: 779000.

    Google Scholar

    [5] 徐建程, 刘志超, 杜雅薇, 等.带旋转毛玻璃干涉成像系统的统计分析[J].强激光与粒子束, 2011, 23 (3): 702–706.

    Google Scholar

    Xu J C, Liu Z C, Du Y W, et al. Statistical analysis of interferometric imaging system with rotating diffuser[J]. High Power Laser and Particle Beams, 2011, 23(3): 702–706.

    Google Scholar

    [6] 王森, 李洪国, 张德建, 等.毛玻璃转速对热光成像质量的影响[J].量子光学学报, 2015, 21(1):9–13.

    Google Scholar

    Wang S, Li H G, Zhang D J, et al. The influence of rotational speed of ground-glass on the quality of ghost imaging with thermal light[J]. Journal of Quantum Optics, 2015, 21(1): 9–13.

    Google Scholar

    [7] Tziraki M. Jones R, French P M W, et al. Photorefractive holography for imaging through turbid media using low coherence light[J]. Applied Physics B, 2000, 70(1): 151–154. doi: 10.1007/s003400050023

    CrossRef Google Scholar

    [8] Chen C Y, Su W C, Lin C H, et al. Reduction of speckles and distortion in projection system by using a rotating diffuser[J]. Optical Review, 2012, 19(6): 440– 443. doi: 10.1007/s10043-012-0075-x

    CrossRef Google Scholar

    [9] Li J. Design of optical engine for LCOS laser display with rotated diffuser plate[J]. Microwave and Optical Technology Letters, 2013, 55(1): 138–141. doi: 10.1002/mop.v55.1

    CrossRef Google Scholar

    [10] 涂桥, 于瀛洁, 周文静.基于旋转毛玻璃片的全息系统去噪处理[J].光学仪器, 2014, 36(4)): 337–341.

    Google Scholar

    Tu Q, Yu Y J, Zhou W J. A method to eliminate the noise of holographic system by using a rotated diffuser[J]. Optical instrument, 2014, 36(4): 337–341.

    Google Scholar

  • Overview: In the interference system, the defects of the optical elements on the surface became a new light source, and coherent noise was generated under the irradiation of the laser beam. Then, a Newton ring and a bull’s-eye would be formed. They would affect the quality of the interfereogram acquisition, further influence the subsequent of interference image processing, and bring the measurement error. These coherent noises which influenced the interference results were the intrinsic noise of the system. The intrinsic noise were a difficult problem when the interferometer was designed. Therefore, experts and scholars made a lot of efforts in order to suppress the intrinsic noise. This paper mainly analyzed the noise reduction performance of rotated diffuser in Fizeau interferometer, and analyzed the relationship among the speed of diffuser and the SNR , contrast of speckle, contrast of fringe in order to improve the quality of interference images.

    In order to cope with the coherent noise existing in the interferometric system, the rotated diffuser was adopted to suppress the coherent noise. The relative relationship among the contrast of fringe, speckle contrast , the SNR and rotated diffuser speed on the quality of the interfering image were obtained. Then, the control parameters of rotated diffuser would be required in the interference fringe through the verification experiment. The interference images were obtained under different control parameters. With the speed of the rotated diffuser increased, the relative contrast of the speckle, the fringe contrast and the SNR of the interference images were analyzed. And a good consistency was shown through the simulation results.

    According to the measurement principle, we set up the Fizeau interference experiment system. The time delay of test light and reference light in interfering the system is τRT = 5×10-8, detector acquisition period T = 1/714 s, circular pupil diameter (entrance pupil diameter) D = 7 mm and wavelength λ = 650 nm. Assume that the angular velocity of the rotated diffuser is ω = 2πf, where f is the rotational speed of the diffuser, r = 20 mm, z = 35 mm.

    The experimental results showed that it was rotated diffuser that could suppress the noise of the system in the interfering system significantly. With the speed of the rotated diffuser increased, meanwhile, the fringe contrast of the images would be decreased. However, the SNR would be improved. It is indicated that the rotated diffuser did have the effect of suppressing coherent noise. It provided the basis for the processing design of the diffuser in the interferometer, so as to realize the high-precision surface inspection.

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