Simulation method for error term of active optical system of optical remote sensing camera

Abstract

The invention discloses a simulation method for an error term of an active optical system of an optical remote sensing camera, and relates to the technical field of integrated simulation of optical remote sensing cameras. In order to solve the problem of imaging quality reduction caused by factors such as emission vibration, gravity release, temperature changes and the like, the active optical system adopts an active correction technology, and the simulation precision of the active optical system is influenced by the simulation method and accuracy of the error term in the simulation process. According to the invention, an optical model, a dynamic model, a control algorithm model and error terms are subjected to row set operation to form optical, mechanical and control integrated simulation, and continuous iteration is carried out till that a system wave aberration meets a requirement. According to the invention, various errors involved in the active optical correction process of the optical camera are considered in active optical integration simulation, compared with an existing idealized simplified model, the simulation method is closer to the actual process, and the simulation result has a higher reference value for the design process.

Description

technical field [0001] The invention relates to the technical field of integrated simulation of optical remote sensing cameras, in particular to a simulation method for error items of active optical systems of optical remote sensing cameras. Background technique [0002] With the continuous development of optical remote sensing imaging technology, the space optical remote sensing system has become more and more complex, and is developing in the direction of large aperture, large field of view, and high resolution. In the actual imaging process, it is also easy to be interfered by launch, gravity environment and temperature factors, which seriously affects the observation performance. The active optical correction technology is to realize the optical remote sensing camera. The key technology of quality imaging; active optics uses image quality detection as the evaluation standard and feedback channel, and actively adjusts the wave aberration of the system by adjusting the mir...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of optical remote sensing imaging technology, the space optical remote sensing system has become more and more complex, and is developing in the direction of large aperture, large field of view, and high resolution. In the actual imaging process, it is also easy to be interfered by launch, gravity environment and temperature factors, which seriously affects the observation performance. The active optical correction technology is to realize the optical remote sensing camera. The key technology of quality imaging; active optics uses image quality detection as the evaluation standard and feedback channel, and actively adjusts the wave aberration of the system by adjusting the mirror surface shape and mirror attitude, so as to improve the imaging quality to the design level. There are many examples of cameras adopting active optical correction, not only the precedent of single-lens active optics, but also the use cases of splicing mirror active optics with the increase of aperture. Generally speaking, active optical correction technology is widely used in foundation projects There are many mature cases. Although space active optics has not yet been in orbit, it has become a research hotspot and a future trend. Whether it is ground-based or space active optics, it has to go through a lot of ground simulations and experiments, and it needs to be focused on research.

Images