变焦结构光成像系统的光学设计
|
摘要
为了实现快速低成本改变光学系统焦距,设计了基于液体透镜的变焦结构光三维成像镜头和微透镜阵列。系统采用7片球面玻璃镜片和1片液体透镜结构,F#为3.2,全视场大小为10mm,总长180mm,焦距变化范围54mm~61mm。结果表明:该系统能实现投影距离227mm~256mm调节,调焦过程中目标表面清晰,细节分辨率高,系统在整个变焦区域内,在40lp/mm时,全视场MTF优于0.2,系统场曲小于0.2,畸变小于0.2%。柱面微透镜阵列整体尺寸为10mm×10mm,周期宽度为1mm,厚度为1mm。随着投影距离的增长,光学系统成像质量先上升后下降,在237mm处成像质量最优,随着投影距离的增加,光学系统的放大倍率增大,光学系统整体相对照度不均匀性小于0.2。
In order to change the focal length of optical system rapidly and at a low cost,we designed the zoom structured light three-dimensional imaging lens and micro-lens array based on liquid lens.The system utilizes the structure of seven spherical glass lenses and one liquid lens,the F# number is 3.2,the full field of view(FOV)is 10 mm,the system total length is 180 mm,and the focal length ranges from 54 mm to 61 mm.The design result shows that,the system can adjust the distance of projection in 227 mm~256 mm;during focusing process the target surface is clear and the resolution ratio has a high quality,while system is within the whole zoom range;at 40 lp/mm,the modulation transfer function(MTF)of full FOV is better than 0.2,the system field curvature is less than 0.2,and the distortion is less than 0.2%.The cylindrical micro-lens array has an overall size of 10 mm×10 mm,aperiod width of 1 mm and a thickness of 1 mm.With the increase of projection distance,the imaging quality of optical system increases first and then decreases,the imaging quality is optimal at 237 mm;as the projection distance increases,the magnification of the optical system increases;the overall relative illuminance heterogeneity of optical system is less than 0.2.
In order to change the focal length of optical system rapidly and at a low cost,we designed the zoom structured light three-dimensional imaging lens and micro-lens array based on liquid lens.The system utilizes the structure of seven spherical glass lenses and one liquid lens,the F# number is 3.2,the full field of view(FOV)is 10 mm,the system total length is 180 mm,and the focal length ranges from 54 mm to 61 mm.The design result shows that,the system can adjust the distance of projection in 227 mm~256 mm;during focusing process the target surface is clear and the resolution ratio has a high quality,while system is within the whole zoom range;at 40 lp/mm,the modulation transfer function(MTF)of full FOV is better than 0.2,the system field curvature is less than 0.2,and the distortion is less than 0.2%.The cylindrical micro-lens array has an overall size of 10 mm×10 mm,aperiod width of 1 mm and a thickness of 1 mm.With the increase of projection distance,the imaging quality of optical system increases first and then decreases,the imaging quality is optimal at 237 mm;as the projection distance increases,the magnification of the optical system increases;the overall relative illuminance heterogeneity of optical system is less than 0.2.
引文
[1]LIU Xinran,GUO Hang,LIU Feng.The history and development of chairside CAD/CAM restoration system[J].Chinese Journal of Practical Stomatology,2014,7(12):762-766.刘欣然,郭航,刘峰.椅旁数字化修复系统的历史和发展[J].中国实用口腔科杂志,2014,7(12):762-766.
[2]WU Yuhan,ZHOU Mingquan.Application of 3D scanning technique in heritage protection[J].Computer Technology and Development,2009,19(9):173-176.吴玉涵,周明全.三维扫描技术在文物保护中的应用[J].计算机技术与发展,2009,19(9):173-176.
[3]SHU Pan,SHENG Zhong,QIU Lirong,et al.Highly stable three-dimensional scanning technology and system in differential confocal microscopy imaging[J].Optical Technique,2017,43(3):212-216,221.舒攀,盛忠,邱丽荣,等.差动共焦显微成像高稳定三维扫描技术与系统[J].光学技术,2017,43(3):212-216,221.
[4]CAO Jie,HAO Qun,XIA Wenze,et al.Design and realization of retina-like three-dimensional imaging based on a MOEMS mirror[J].Optics and Lasers in Engineering,2016,82:1-13.
[5]LIU Hong,WANG Wenxiang,LI Weishi.Photogrammetric method for accurate tracking of 3D scanning probe[J].Journal of Computer Applications,2017,37(7):2057-2061.刘虹,王文祥,李维诗.三维扫描测头精确跟踪的摄影测量方法[J].计算机应用,2017,37(7):2057-2061.
[6]MULLER H C.Registration of occlusion by buccal scan in Cerec software version 3.80[J].International Journal of Computerized Dentistry,2010,13(3):265.
[7]CHENG Qiansheng.Digital signal processing[M].Beijing:Peking University Press,2010.程乾生.数字信号处理[M].北京:北京大学出版社,2010.
[8]YU Daoyin,Engineering optics[M].Beijing;China Machine Press,2008.郁道银.工程光学[M].北京:机械工业出版社,2008.
[9]OH S H,RHEE K,SANG S K,et al.Electromagnetically driven liquid lens[J].Sensors and Actuators A:Physical,2016,240:153-159.
[10]ZHAO Rui,MA Jianquan,DANG Zhiyong,et al.Design and analysis of an optical zoom system using electrowetting-based triple liquid lens[J].Acta Photonica Sinica,2017,46(6):204-212.赵瑞,马建权,党智勇,等.基于介电润湿三液体透镜的变焦光学系统的设计与分析[J].光子学报,2017,46(6):204-212.
[11]SHI Haodong,HE Jingyi,GUO Litao,et al.Optical design of F-theta scanning lens for laser resistor trimming machine[J].Opto-Electronic Engineering,2013,40(11):51-55.史浩东,何景宜,郭力滔,等.激光调阻机F-theta扫描镜头光学设计[J].光电工程,2013,40(11):51-55.
[12]ZHANG Yimo.Applied optics[M].Beijing:China Machine Press,1982.张以谟.应用光学[M].北京:机械工业出版社,1982.
[13]CUI Jianying.Fundamentals of optical mechanics[M].Beijing:Tsinghua University Press,2003.崔建英.光学机械基础[M].北京:清华大学出版社,2003.
[14]Optical Research Association.CODE V 9.5introductory users guide[M].Pasadena:Optical Research Associates,2004.
[15]WANG Honghe,LI Xiangning,HUANG Wenqiang,et al.Design of large zoom ratio liquid lens system[J].Acta Photonica Sinica,2016,45(6):54-60。王鸿鹤,李湘宁,潘文强,等.大变倍比液体透镜变焦系统设计[J].光子学报,2016,45(6):54-60.
[16]ZHANG Ying.Research on zoom lens design with liquid lenses[D].Changchun:Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,2012.张鹰.基于液体透镜的变焦距光学系统研究[D].长春:长春光学精密机械与物理研究所,2012.
[17]XIAO Zexin.Engineering optical design[M].Beijing:Publishing House of Electronics Industry,2002.萧泽新.工程光学设计[M].北京:电子工业出版社,2002.
[18]ZHAO Yingming,YANG Ruofu,YANG Chunping.Design of 10×infrared zoom lens with all sphere surfaces[J].Journal of Applied Optics,2016,37(3):465-470.赵英明,杨若夫,杨春平.10倍全球面红外变焦光学系统设计[J].应用光学,2016,37(3):465-470.
[19]LUO Chunhua,YUE Pinliang,ZHANG Donghu,et al.Optical design of zoom projection lens[J].Journal of Applied Optics,2017,38(2):465-470.罗春华,岳品良,张东虎,等.变焦投影物镜光学系统设计[J].应用光学,2017,38(2):180-186.
[20]WU Shihui,HUANG Xiaoyan,ZHANG Yanke.Design of a barcode imaging lens[J].Optical Instruments,2014,36(5):420-425.吴世蕙,黄晓燕,张燕珂.一款条码扫描成像镜头的多方案设计和选择[J].光学仪器,2014,36(5):420-425.
[2]WU Yuhan,ZHOU Mingquan.Application of 3D scanning technique in heritage protection[J].Computer Technology and Development,2009,19(9):173-176.吴玉涵,周明全.三维扫描技术在文物保护中的应用[J].计算机技术与发展,2009,19(9):173-176.
[3]SHU Pan,SHENG Zhong,QIU Lirong,et al.Highly stable three-dimensional scanning technology and system in differential confocal microscopy imaging[J].Optical Technique,2017,43(3):212-216,221.舒攀,盛忠,邱丽荣,等.差动共焦显微成像高稳定三维扫描技术与系统[J].光学技术,2017,43(3):212-216,221.
[4]CAO Jie,HAO Qun,XIA Wenze,et al.Design and realization of retina-like three-dimensional imaging based on a MOEMS mirror[J].Optics and Lasers in Engineering,2016,82:1-13.
[5]LIU Hong,WANG Wenxiang,LI Weishi.Photogrammetric method for accurate tracking of 3D scanning probe[J].Journal of Computer Applications,2017,37(7):2057-2061.刘虹,王文祥,李维诗.三维扫描测头精确跟踪的摄影测量方法[J].计算机应用,2017,37(7):2057-2061.
[6]MULLER H C.Registration of occlusion by buccal scan in Cerec software version 3.80[J].International Journal of Computerized Dentistry,2010,13(3):265.
[7]CHENG Qiansheng.Digital signal processing[M].Beijing:Peking University Press,2010.程乾生.数字信号处理[M].北京:北京大学出版社,2010.
[8]YU Daoyin,Engineering optics[M].Beijing;China Machine Press,2008.郁道银.工程光学[M].北京:机械工业出版社,2008.
[9]OH S H,RHEE K,SANG S K,et al.Electromagnetically driven liquid lens[J].Sensors and Actuators A:Physical,2016,240:153-159.
[10]ZHAO Rui,MA Jianquan,DANG Zhiyong,et al.Design and analysis of an optical zoom system using electrowetting-based triple liquid lens[J].Acta Photonica Sinica,2017,46(6):204-212.赵瑞,马建权,党智勇,等.基于介电润湿三液体透镜的变焦光学系统的设计与分析[J].光子学报,2017,46(6):204-212.
[11]SHI Haodong,HE Jingyi,GUO Litao,et al.Optical design of F-theta scanning lens for laser resistor trimming machine[J].Opto-Electronic Engineering,2013,40(11):51-55.史浩东,何景宜,郭力滔,等.激光调阻机F-theta扫描镜头光学设计[J].光电工程,2013,40(11):51-55.
[12]ZHANG Yimo.Applied optics[M].Beijing:China Machine Press,1982.张以谟.应用光学[M].北京:机械工业出版社,1982.
[13]CUI Jianying.Fundamentals of optical mechanics[M].Beijing:Tsinghua University Press,2003.崔建英.光学机械基础[M].北京:清华大学出版社,2003.
[14]Optical Research Association.CODE V 9.5introductory users guide[M].Pasadena:Optical Research Associates,2004.
[15]WANG Honghe,LI Xiangning,HUANG Wenqiang,et al.Design of large zoom ratio liquid lens system[J].Acta Photonica Sinica,2016,45(6):54-60。王鸿鹤,李湘宁,潘文强,等.大变倍比液体透镜变焦系统设计[J].光子学报,2016,45(6):54-60.
[16]ZHANG Ying.Research on zoom lens design with liquid lenses[D].Changchun:Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,2012.张鹰.基于液体透镜的变焦距光学系统研究[D].长春:长春光学精密机械与物理研究所,2012.
[17]XIAO Zexin.Engineering optical design[M].Beijing:Publishing House of Electronics Industry,2002.萧泽新.工程光学设计[M].北京:电子工业出版社,2002.
[18]ZHAO Yingming,YANG Ruofu,YANG Chunping.Design of 10×infrared zoom lens with all sphere surfaces[J].Journal of Applied Optics,2016,37(3):465-470.赵英明,杨若夫,杨春平.10倍全球面红外变焦光学系统设计[J].应用光学,2016,37(3):465-470.
[19]LUO Chunhua,YUE Pinliang,ZHANG Donghu,et al.Optical design of zoom projection lens[J].Journal of Applied Optics,2017,38(2):465-470.罗春华,岳品良,张东虎,等.变焦投影物镜光学系统设计[J].应用光学,2017,38(2):180-186.
[20]WU Shihui,HUANG Xiaoyan,ZHANG Yanke.Design of a barcode imaging lens[J].Optical Instruments,2014,36(5):420-425.吴世蕙,黄晓燕,张燕珂.一款条码扫描成像镜头的多方案设计和选择[J].光学仪器,2014,36(5):420-425.