Abstract
In the process of development of numerous optical systems of aerospace designation, it is necessary to take into account deformations that arise in the optical and mechanical elements of the structure. Such deformations can occur due to loads, vibrations, impacts, temperature effects, and other factors. Their consideration in system development will enable prediction of influence of external factors on the final optical image quality. However, it is impossible to directly import results of finite element analysis into optical programs. A special computer program Deform was developed, which makes it possible to link programs for finite-element and optical analysis. The general idea is to determine parameters of the shape and spatial orientation of the spherical or aspherical basic surface, which is most closely approximated to the deformed surface for a specified set of surface points. Next, approximation of the deformation function of higher order is carried out. Operability of this software has been proven during development of means for a three-mirror anastigmattic quasi-orthoscopic lens. With the help of parametric simulation, a study was carried out on the influence of geometric parameters of lightening and fastening on deformation of the working surface of extra-axial segments of axisymmetric mirrors. As a result of this study, an option of lightening and fastening was selected, which minimized deformation of the working mirror surfaces. The results of simulation of impact of gravity on nonlightened and lightened mirrors, which was carried out in ANSYS Workbench, were then imported into ZEMAX optical analysis program for obtaining MTF charts of the system
Highlights
In the process of developing numerous optical systems of aerospace purpose, it is necessary to take into account deformations that arise in the optical and mechanical elements of the structure
Taking into account deformations taking place during development of the systems will enable prediction of influence of external factors on the final optical image quality. This issue is especially relevant in the development of high-quality optical systems, for example, systems for remote Earth sensing from outer space, since designing and manufacturing such systems is costly
The software package allows users to import the results of simulation of specific systems, such as diffraction gratings [6], large segmented mirrors [7], adaptive mirrors [8], etc. into the optical analysis programs. It uses a fairly complex mathematical apparatus based on the calculation of birefringence, which arises in the material of components under the influence of external factors [9]
Summary
In the process of developing numerous optical systems of aerospace purpose, it is necessary to take into account deformations that arise in the optical and mechanical elements of the structure. Taking into account deformations taking place during development of the systems will enable prediction of influence of external factors on the final optical image quality This issue is especially relevant in the development of high-quality optical systems, for example, systems for remote Earth sensing from outer space, since designing and manufacturing such systems is costly. It uses a fairly complex mathematical apparatus based on the calculation of birefringence, which arises in the material of components under the influence of external factors [9] Such an analysis is important for the systems in which polarization of radiation and shape of the wave front are critical [9]. For such systems (for example, remote Earth sensing systems), it is possible to create a simpler algorithm for calculating deformations, which will not be inferior to the accuracy of the algorithm based on the birefringence calculation
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Eastern-European Journal of Enterprise Technologies
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
