Test method of the dynamic modulation transfer function in an indoor analog environment

被引：0
|
作者：
Zhang W. [1 ]
Yu X. [2 ]
Han F. [2 ]
Zhang F. [1 ]
Wu Y. [1 ]
Chen Y. [2 ]
机构：
[1] School of Optoelectronic Engineering, Xi’an Technological University, Xi’an
[2] School of Weapon Science and Technology, Xi’an Technological University, Xi’an
来源：
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2022年 / 51卷 / 07期
关键词：
dynamic modulation transfer function; photoelectric imaging system; simulated moving target system; variable frequency grating target;
D O I：
10.3788/IRLA20210756
中图分类号：
学科分类号：
摘要：
Aimed at the requirements of remote observation dynamic performance evaluation of photoelectric imaging systems such as vehicle visual intelligent perception and low altitude regional defense, an indoor simulated moving target system was developed. Based on the linear space shift invariant system model, the MTF measurement principles with ''three-bar target'' and ''four-bar target'' were analysed. A measurement method of the dynamic modulation transfer function (MTF) was proposed for an optoelectronic imaging system based on a variable frequency target. A design scheme of a variable frequency target was introduced, the solution method of MTF value was proposed, and the static and dynamic MTF comparative test experiments were conducted for ''three-bar target'' and variable frequency target. The experimental results show that compared with the "three bar target" measurement method, the proposed frequency conversion target dynamic MTF measurement method has a relative maximum deviation ratio of 1.9% for static MTF measurement and 2.8% for dynamic MTF measurement. The method can solve the MTF curve from one target image and has more advantages than ''knife edge method'', ''three-bar target'', ''four-bar target'' and other methods in the field of dynamic MTF measurement technology. © 2022 Chinese Society of Astronautics. All rights reserved.
引用
收藏
相关论文
共 16 条
  • [1] Meng Wei, Jin Longxu, Li Guoning, Et al., Application of MTF in remote sensing image restoration, Infrared and Laser Engineering, 43, 5, pp. 1690-1696, (2014)
  • [2] Chen L, Chen H L, Zhang P, Et al., On-orbit modulation transfer function measurement based on lunar limb for TY-2 G, Optics and Precision Engineering, 26, 12, pp. 3012-3018, (2018)
  • [3] Wu Z P, Qu Y W, Zhao Q G., On-orbit measurement of modulation transfer function for optical remote sensing cameras based on periodic ground targets [J], Acta Optica Sinica, 39, 7, (2019)
  • [4] Guo L L, Wu Z P, Zhao Q C, Et al., On-orbit modulation transfer function measurement of medium resolution spectral imager [J], Acta Optica Sinica, 36, 4, (2016)
  • [5] Chen L X, Rao P, Sun Y Y, Et al., On-orbit modulation transfer function measurement method of space cameras based on star points [J], Laser & Optoelecronics Progress, 57, 16, (2020)
  • [6] Rudoler S, Hadar O, Fisher M, Et al., Image resolution limits resulting from mechanical vibrations. Part II: Experiment, Optical Engineering, 30, 5, pp. 577-589, (2016)
  • [7] Hadar O, Dror I, Kopeika N S., Image resolution limits resulting from mechanical vibrations. Part IV: real-time numerical calculation of optical transfer functions and experimental verification, Optical Engineering, 33, 2, pp. 566-578, (1994)
  • [8] Liu C, Ding Y L, Tian D P., Dynamic modulation transfer function analysis and research of image rotation for aerial camera [J], Acta Optica Sinica, 37, 2, (2017)
  • [9] Masaoka Kenichiro, Real-time modulation transfer function measurement system, Proc of SPIE, 10943, (2019)
  • [10] Nicholas J M, Matthew P D, Bradley D D., Optcal sparse aperture imaging, Applied Optics, 46, 23, pp. 5933-5943, (2007)
12