光电校靶中捷联惯导轴线的表征校准方法

光电校靶采用捷联惯导系统,需将惯导轴线用光电自准直系统表征捷联,用于对设备轴线的测量。光电自准直系统所表征的轴线与惯导轴线的一致性是影响校靶精度的重要因素,为提高光电校靶系统测量精度和效率,提出了一种惯导轴线的光电表征和校准方法。该方法是在分析测量结果偏差与一致性关系的基础上,采用实验数据拟合的方式得到自准直系统光轴与惯导轴之间的角度偏差值,用于系统修正,从而实现高精度校准。通过试验,将传统光机校正法和光电校准法结合使用,可大幅度提高系统校正效率,同时得到惯导与光轴一致性精度在15″以内。试验结果表明,与传统光学平晶引出的光机校正法相比,该方法的表征准确度和校准精度更高,适用于高精度惯性测量系统。     

Influence of inherent error of fiber-optic image inverter on application北大核心CSCD

The low-level-light image intensifier is an important photoelectric detection and imaging device in the field of night vision, and it is widely used in head-mounted display, hand-held observation and night aiming. The super-second-generation inverted image low-level-light image intensifier with fiber-optic image inverter is widely used in the night aiming system. According to the requirement of practical application, the influence of turning angle error and snake-shaped distortion in the inherent error of inverted image low-level-light image intensifier on the measurement error of aiming and stroke difference in application was analyzed. The analyses show that when the image turning angle error is less than 30' and the snake distortion is less than 30 μm, it can meet the requirements of close-range aiming and measurement of stroke difference. A detection device was developed to control the error, which solved the problem and put forward the relevant quality control points for the production and manufacture of image intensifiers for this kind of application. © 2022 Editorial office of Journal of Applied Optics. All rights reserved.     

一种双曲面光学系统中次镜装调设计与实现北大核心CSCD

R-C(Ritchey-Chretien)光学系统作为两镜反射式光学系统,是双曲面光学系统的典型结构形式,在现代光学工程中具有重要的应用。以缩短高精度系统装调周期和指导高精度系统批量生产为目的,用某一机载星敏感器所应用的R-C光学系统为例,在确定以主镜为装调基准的前提下,针对直径较小的次镜,设计了一种次镜装调机构,实现次镜6个自由度调整,并对装调、固化过程中涉及的方法进行了说明。通过对装调前后以及环境试验后的系统像质进行测试,验证了设计机构的稳定性。测试结果表明:该次镜装调机构能够满足系统像质要求,整机波像差PV值优于(1/2)λ,RMS值优于(1/15)λ,装调方法达到可指导高精度系统批量生产的目的。