To realize effective co-phasing adjustment in large-aperture sparse-aperture telescopes,a multichannel stripe tracking approach is employed,allowing simultaneous interferometric measurements of multiple optical paths ...To realize effective co-phasing adjustment in large-aperture sparse-aperture telescopes,a multichannel stripe tracking approach is employed,allowing simultaneous interferometric measurements of multiple optical paths and circumventing the need for pairwise measurements along the mirror boundaries in traditional interferometric methods.This approach enhances detection efficiency and reduces system complexity.Here,the principles of the multibeam interference process and construction of a co-phasing detection module based on direct optical fiber connections were analyzed using wavefront optics theory.Error analysis was conducted on the system surface obtained through multipath interference.Potential applications of the interferometric method were explored.Finally,the principle was verified by experiment,an interferometric fringe contrast better than 0.4 is achieved through flat field calibration and incoherent digital synthesis.The dynamic range of the measurement exceeds 10 times of the center wavelength of the working band(1550 nm).Moreover,a resolution better than one-tenth of the working center wavelength(1550 nm)was achieved.Simultaneous three-beam interference can be achieved,leading to a 50%improvement in detection efficiency.This method can effectively enhance the efficiency of sparse aperture telescope co-phasing,meeting the requirements for observations of 8-10 m telescopes.This study provides a technological foundation for observing distant and faint celestial objects.展开更多
For segmented detectors,surface flatness is critical as it directly influences both energy resolution and image clarity.Additionally,the limited adjustment range of the segmented detectors necessitates precise benchma...For segmented detectors,surface flatness is critical as it directly influences both energy resolution and image clarity.Additionally,the limited adjustment range of the segmented detectors necessitates precise benchmark construction.This paper proposes an architecture for detecting detector flatness based on channel spectral dispersion.By measuring the dispersion fringes for coplanar adjustment,the final adjustment residual is improved to better than 300 nm.This result validates the feasibility of the proposed technology and provides significant technical support for the development of next-generation large-aperture sky survey equipment.展开更多
对国外转塔式光电瞄准吊舱进行了划代,介绍了典型第三代吊舱的主要技术特点,定义了衡量光电吊舱集成度的四个评价标准:通光孔径与舱体直径之比、通光孔径的立方与系统重量之比,舱体直径的立方与系统重量之比以及有效载荷重量与系统重量...对国外转塔式光电瞄准吊舱进行了划代,介绍了典型第三代吊舱的主要技术特点,定义了衡量光电吊舱集成度的四个评价标准:通光孔径与舱体直径之比、通光孔径的立方与系统重量之比,舱体直径的立方与系统重量之比以及有效载荷重量与系统重量之比,实现了从宏观层级对性能相近的光电瞄准吊舱功能密度或技术水平的定量评价。介绍了国外典型装备的发展状况,重点针对美国MTS-B吊舱、土耳其ASELFLIR350吊舱及之后的400/500、加拿大MX-15D吊舱、法国EUROFLIR410吊舱和德国ARGOS II HDT等典型产品进行了对比分析,介绍了各自的技术风格、特点和重要载荷;通过正向设计评估验证了MTS-B前置望远系统的性能指标和ASELFLIR350的光学有效载荷;总结了现代光电瞄准吊舱的几大趋同化技术特点:多波段共孔径折反式主系统+旁轴小口径次系统的光机架构正取得共识、多种波段的激光探测技术日益倾向主动光学方向、基于多轴多框平台和快反镜相结合的复合轴控制技术正在普及、详查探测更注重目标细节区域增强、多波段图像融合信息处理技术在显控中越发重要。展开更多
文摘To realize effective co-phasing adjustment in large-aperture sparse-aperture telescopes,a multichannel stripe tracking approach is employed,allowing simultaneous interferometric measurements of multiple optical paths and circumventing the need for pairwise measurements along the mirror boundaries in traditional interferometric methods.This approach enhances detection efficiency and reduces system complexity.Here,the principles of the multibeam interference process and construction of a co-phasing detection module based on direct optical fiber connections were analyzed using wavefront optics theory.Error analysis was conducted on the system surface obtained through multipath interference.Potential applications of the interferometric method were explored.Finally,the principle was verified by experiment,an interferometric fringe contrast better than 0.4 is achieved through flat field calibration and incoherent digital synthesis.The dynamic range of the measurement exceeds 10 times of the center wavelength of the working band(1550 nm).Moreover,a resolution better than one-tenth of the working center wavelength(1550 nm)was achieved.Simultaneous three-beam interference can be achieved,leading to a 50%improvement in detection efficiency.This method can effectively enhance the efficiency of sparse aperture telescope co-phasing,meeting the requirements for observations of 8-10 m telescopes.This study provides a technological foundation for observing distant and faint celestial objects.
文摘For segmented detectors,surface flatness is critical as it directly influences both energy resolution and image clarity.Additionally,the limited adjustment range of the segmented detectors necessitates precise benchmark construction.This paper proposes an architecture for detecting detector flatness based on channel spectral dispersion.By measuring the dispersion fringes for coplanar adjustment,the final adjustment residual is improved to better than 300 nm.This result validates the feasibility of the proposed technology and provides significant technical support for the development of next-generation large-aperture sky survey equipment.
文摘对国外转塔式光电瞄准吊舱进行了划代,介绍了典型第三代吊舱的主要技术特点,定义了衡量光电吊舱集成度的四个评价标准:通光孔径与舱体直径之比、通光孔径的立方与系统重量之比,舱体直径的立方与系统重量之比以及有效载荷重量与系统重量之比,实现了从宏观层级对性能相近的光电瞄准吊舱功能密度或技术水平的定量评价。介绍了国外典型装备的发展状况,重点针对美国MTS-B吊舱、土耳其ASELFLIR350吊舱及之后的400/500、加拿大MX-15D吊舱、法国EUROFLIR410吊舱和德国ARGOS II HDT等典型产品进行了对比分析,介绍了各自的技术风格、特点和重要载荷;通过正向设计评估验证了MTS-B前置望远系统的性能指标和ASELFLIR350的光学有效载荷;总结了现代光电瞄准吊舱的几大趋同化技术特点:多波段共孔径折反式主系统+旁轴小口径次系统的光机架构正取得共识、多种波段的激光探测技术日益倾向主动光学方向、基于多轴多框平台和快反镜相结合的复合轴控制技术正在普及、详查探测更注重目标细节区域增强、多波段图像融合信息处理技术在显控中越发重要。
