基于相位差异技术的车载白天高分辨成像系统（英文）
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摘要
在1.2m车载望远镜的基础上,通过机上折轴卡塞格林焦点,将主光学系统与白天成像系统相连,实现了白天高分辨成像.该系统采用短波红外波段,在精密跟踪的同时,校正大气波前整体倾斜.近红外波段的双通道成像系统,通过在焦与离焦像面同时采集后,利用相位差异技术来提高成像分辨率.该系统探测能力达到5等星,成像分辨率接近两倍衍射极限,观测时间比自适应系统延长6h.
A bent Cassergrain focus was used to connect a daytime imaging system to a 1.2 maperture vehicular telescope.The system employs a short-wavelength infrared waveband for precise tracking and corrects the global atmospheric wavefront tilt at the same time.Double-pass imaging is applied to the near-infrared waveband to produce the image,while the phase-diversity technique is used to restore the image resolution.The system can detect and correct objects with a magnitude 5 or less at an image resolution that is close to twice the diffraction limit.The observation time is 6 hours longer than that of the adaptive system.
A bent Cassergrain focus was used to connect a daytime imaging system to a 1.2 maperture vehicular telescope.The system employs a short-wavelength infrared waveband for precise tracking and corrects the global atmospheric wavefront tilt at the same time.Double-pass imaging is applied to the near-infrared waveband to produce the image,while the phase-diversity technique is used to restore the image resolution.The system can detect and correct objects with a magnitude 5 or less at an image resolution that is close to twice the diffraction limit.The observation time is 6 hours longer than that of the adaptive system.
引文
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[2]DEAN B,BROWERS C.Diversity selection for phase-diverse phase retrieval[J].Journal of the Optical Society of America A,2003,20(8):1490-1504.
[3]BELEN M,BRINKLEY T,BRUNS D,et al.Portable daytime differential image motion sensor for atmospheric turbulence characterization[C].SPIE,2010,7814:78140J.
[4]ZHANG R,XIAN H,RAO C,et al.Study on application of spectral filter in detecting stars in daytime[C].SPIE,2012,8419:84190T.
[5]ZHANG R,XIAN H,RAO C,et al.Study on effect of polarization for improving signal noise ratio of stellar objects in daytime[C].SPIE,2011,8191:81911M.
[6]WEI Pei-feng,LU Zhen-wu,LIU Xin-yue,et al.Performance analysis of adaptive optical system for spatial objectives[J].Acta Photonica Sinica,2015,44(7):0701001.
[7]MARCO J,MONTOYA L,COLLADOS M,et al.Daytime turbulence profiling for EST and its impact in the solart MCAO system design[C].SPIE,2016,9909:99096X.
[8]TAN Bi-tao,CHEN Hong-bin,WANG Ji-hong,Image quality evaluation on extended imaging of telescopes[J].Acta Photonica Sinica,2015,44(9):0911003.
[9]ZHANG S,WU Y,ZHAO J,et al.Astronomical image restoration through atmosphere turbulence by lucky imaging[C].SPIE,2011,8009:80090B.
[10]MARITZ B,KOAGO M,WAINMAN C,et al.Vertical atmospheric variability measured above water during the FESTER experiment:first results[C].SPIE,2016,10002:100020B.
[11]LIU Xiang-yi,ZHANG Jing-xu,WU Xiao-xia,et al.Affect of environment on mirror seeing of large-aperture SiClightweight primary mirror[J].Optics and Precision Engineering,2015,23(3):776-783.
[12]MING Ming,LV Tian-yu,SHAO Liang,et al.Image restoration and optical test by using offner optical system[J].Chinese Optics,2012,5(6):646-651.
[13]JU G,YAN C,GU Z,et al.Aberration fields of off-axis two-mirror astronomical telescopes induced by lateral misalignments[J].Optics Express,2016,24(21):24665.
[14]YUE Dan,XU Shu-yan,NIE Hai-tao,et al.Error analysis and eliminate methods for wavefront detection based on phase diversity algorithm[J].Acta Optica Sinica,2016,36(1):011003.
[15]RAO C,ZHU L,RAO X,et al.37-element solar adaptive optics for 26-cm solar fine structure telescope at Yunnan Astronomical Observatory[J].Chinese Optics Letters,2010,8(10):966-968.
[16]LAN Bin,YANG Hong-bo,WU Xiao-xia,et al.Influence of unsteady wind loads on imaging quality of the 1.2m ground telescope[J].Laser Optoelectronics Progress,2016,(53):111103.
[17]SCHMIDT D,RIMMELE T,MARINO J,et al.A review of solar adaptive optics[C].SPIE,2016,9909:99090x.
[18]WANG Bin,WANG Zong-yang,WU Yuan-hao,et al.Calibration of no-common path aberration in AO system using multi-channel phase-diversity wave-front sensing[J].Optics and Precision Engineering.2013,21(7):1683-1692.
[19]BENJAMIN L,CHRISTIAN M,RAPHAEL G,et al.Fast focal plane wavefront sensing on ground-based telescopes[C].SPIE,2018,10703:1070351.
[20]SCHMIDT D,BERKEFELD T,FEGER B,et al.Latest achievements with the MCAO testbed for the GREGOR solar telescope[C].SPIE,2010,7736:773607.
[21]HERRIOT G,ANDERSEN D,ATWOOD J,et al.NFIRAOS:TMT′s facility adaptive optics system[C].SPIE,2010,7036:77360B.
[22]MARK T,BRETT A,MICHAEL B,et al.Adaptive spatial filtering for daytime satellite quantum key distribution[C].SPIE,2014,9254:925404.
[23]HU Jin-jin,LIU Jing,CUI Shuang-xing,et al.Evaluation model of detected ability for ground-based electro-optic telescope to space debris[J].Acta Photonica Sinica,2016,45(10):1012002.
[24]CHENG Qiang,XUE Dong-lin,Realizing assisted alignment of three-mirror reflecting optical system by using wavefront sensing test results of phase diversity[J].Acta Optica Sinica,2016,36(7):0711005.