大口径红外离轴三反光学系统设计及公差分析
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摘要
在空间光学领域中,光学系统的发展趋势为长焦距、大视场、轻量化、大相对孔径、高成像质量等。为适应该发展趋势,对大口径反射式光学系统进行研究,在共轴三反系统的成像理论基础上,为避免中心遮拦,提高成像质量,采用视场离轴方式,设计了一款大口径离轴三反式光学系统。该光学系统在奈奎斯特空间频率17lp/mm处,光学传递函数MTF大于0.75,成像质量接近衍射极限。此外,光学系统公差的合理分配是影响相机总体性能的主要因素,运用公差灵敏度分析和反转灵敏度分析,计算各公差对光学系统成像质量的影响,给出了合适的公差分配,经过模拟分析,按照给定的公差加工装调,系统光学传递函数大于0.55。
In the field of space optics,the development trend of optical systems is long focal length,large field of view,light weight,large relative aperture,high imaging quality,and so on.In order to adapt to this development trend,the large-caliber reflective optical system is studied.An off-axis three-mirror optical system with large aperture was designed based on the imaging theory of coaxial three-mirror optical system and the way of field off-axis was used to avoid central shielding problem and improve the image quality.The modulation transform function(MTF)of the optical system is more than 0.75 at the Nyquist frequency of 17 lp/mm and the image quality is close to the diffraction limits.In addition,since the tolerance reasonable distribution of optical system is the main factor that affects the performance of camera,the sensitivity analysis and the inverse sensitivity analysis were used to compute the effect of each tolerance parameter on the optical system image quality and the proper tolerance distribution was determined.Through simulation analysis,the optical system can has high image quality with fabricated and assembled on the basis of tolerance given,and the MTF can be more than 0.55.
In the field of space optics,the development trend of optical systems is long focal length,large field of view,light weight,large relative aperture,high imaging quality,and so on.In order to adapt to this development trend,the large-caliber reflective optical system is studied.An off-axis three-mirror optical system with large aperture was designed based on the imaging theory of coaxial three-mirror optical system and the way of field off-axis was used to avoid central shielding problem and improve the image quality.The modulation transform function(MTF)of the optical system is more than 0.75 at the Nyquist frequency of 17 lp/mm and the image quality is close to the diffraction limits.In addition,since the tolerance reasonable distribution of optical system is the main factor that affects the performance of camera,the sensitivity analysis and the inverse sensitivity analysis were used to compute the effect of each tolerance parameter on the optical system image quality and the proper tolerance distribution was determined.Through simulation analysis,the optical system can has high image quality with fabricated and assembled on the basis of tolerance given,and the MTF can be more than 0.55.
引文
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[7] MENG Qingyu,WANG Wei,JI Zhenhua,et al.Design of off-axis three-mirror system based on integration of primary and tertiary mirrors[J].Infrared and Laser Engineering,2015,44(2):578-582.孟庆宇,王维,纪振华,等.主三镜一体化离轴三反光学系统设计[J].红外与激光工程,2015,44(2):578-582.
[8] YANG Le,SUN Qiang,GUO Banghui.Optical design of off-axis there-mirror system for infrared dualband scene simulation[J].Journal of Applied Optics,2011,32(6):1212-1216.杨乐,孙强,郭邦辉.离轴三反红外双波段景象模拟器光学系统设计[J].应用光学,2011,32(6):1212-1216.
[9] SONG Yanfeng,SHAO Xiaopeng,XU Jun.Off-axis three-mirror reflective optical system[J].Infrared and Laser Engineering,2008,37(4):706-709.宋岩峰,邵晓鹏,徐军.离轴三反射镜光学系统研究[J].红外与激光工程,2008,37(4):706-709.
[10]LIANG Baowen,WU Hanping,WANG Huaze.Design of off-axial TMA infrared optical system for space camera[J].Infrared Technology,2013,35(4):217-222.梁宝雯,吴晗平,王华泽.空间相机离轴三反红外光学系统设计[J].红外技术,2013,35(4):217-222.
[11]WANG Hong,TIAN Tieyin.Design of three line array mapping camera and its tolerance analysis[J].Optics and Precision Engineering,2011,19(7):1444-1449.王红,田铁印.三线阵测绘相机光学系统的设计和公差分析[J].光学·精密工程,2011,19(7):1444-1449.
[12]LI Mengjuan,LIAO Zhibo,WANG Chunyu.Analysis and control on assemblage tolerance in small-aperture high-precision refractive optical system[J].Journal of Applied Optics,2015,36(2):277-281.栗孟娟,廖志波,王春雨.小口径高精度折射式光学系统装调公差的分析与控制[J].应用光学,2015,36(2):277-281.
[2] ZHANG Wenying,ZHANG Guoyu,ZHANG Lei.Optical system design of large-diameter off-axis reflection-type star simulation[J].Journal of Applied Optics,2014,35(6):950-954.张文颖,张国玉,张雷.大口径离轴反射式星模拟器光学系统设计[J].应用光学,2014,35(6):950-954.
[3] ZHAO Wencai.Design of improved off-axial TMA optical systems[J].Optical Precision Engineering,2011,19(12):2837-2843.赵文才.改进的离轴三反光学系统的设计[J].光学·精密工程,2011,19(12):2837-2843.
[4] PAN Junhua.The design,manufacture and test of the aspherical optical surfaces[M].Suzhou:Suzhou University Press,2004:130-138.潘君骅.光学非球面的设计、加工与检验[M].苏州:苏州大学出版社,2004:130-138.
[5] LI Yan,ZHANG Bao,HONG Yongfeng.Compact and multispectral off-axial there-mirror reflective optical system[J].Journal of Applied Optics,2014,35(3):391-394.李岩,张葆,洪永丰.灵巧型离轴三反光学系统设计[J].应用光学,2014,35(3):391-394.
[6] MENG Qingyu,WANG Hongyuan,WANG Yan,et al.Off-axis three-mirror freeform optical system with large linear field of view[J].Infrared and Laser Engineering,2016,45(10):1018002-1-1018002-8.孟庆宇,汪洪源,王严,等.大线视场自由曲面离轴三反光学系统设计[J].红外与激光工程,2016,45(10):1018002-1-1018002-8.
[7] MENG Qingyu,WANG Wei,JI Zhenhua,et al.Design of off-axis three-mirror system based on integration of primary and tertiary mirrors[J].Infrared and Laser Engineering,2015,44(2):578-582.孟庆宇,王维,纪振华,等.主三镜一体化离轴三反光学系统设计[J].红外与激光工程,2015,44(2):578-582.
[8] YANG Le,SUN Qiang,GUO Banghui.Optical design of off-axis there-mirror system for infrared dualband scene simulation[J].Journal of Applied Optics,2011,32(6):1212-1216.杨乐,孙强,郭邦辉.离轴三反红外双波段景象模拟器光学系统设计[J].应用光学,2011,32(6):1212-1216.
[9] SONG Yanfeng,SHAO Xiaopeng,XU Jun.Off-axis three-mirror reflective optical system[J].Infrared and Laser Engineering,2008,37(4):706-709.宋岩峰,邵晓鹏,徐军.离轴三反射镜光学系统研究[J].红外与激光工程,2008,37(4):706-709.
[10]LIANG Baowen,WU Hanping,WANG Huaze.Design of off-axial TMA infrared optical system for space camera[J].Infrared Technology,2013,35(4):217-222.梁宝雯,吴晗平,王华泽.空间相机离轴三反红外光学系统设计[J].红外技术,2013,35(4):217-222.
[11]WANG Hong,TIAN Tieyin.Design of three line array mapping camera and its tolerance analysis[J].Optics and Precision Engineering,2011,19(7):1444-1449.王红,田铁印.三线阵测绘相机光学系统的设计和公差分析[J].光学·精密工程,2011,19(7):1444-1449.
[12]LI Mengjuan,LIAO Zhibo,WANG Chunyu.Analysis and control on assemblage tolerance in small-aperture high-precision refractive optical system[J].Journal of Applied Optics,2015,36(2):277-281.栗孟娟,廖志波,王春雨.小口径高精度折射式光学系统装调公差的分析与控制[J].应用光学,2015,36(2):277-281.
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