The manufacturing technique of aspherical surfaces relies on the assistant optical test design. The paper introduces the typical methods of classic test and null compensation test. Based on the third order spherical theory, the aplanatic expression of classic test and null compensation is derived. In order to realize the aspherical test of large diameter and large relative aperture, and even super large diameter and super large relative aperture. In this paper, the new theory and concept of conjugate correction aspheric test is proposed for the first time. The test is applicable to convex and concave aspheric surface. The principle of conjugate correction test is explained. The basic theory of conjugate correction is established. The analytical mathematical expressions of spherical aberration for three kinds of conjugate correction test configurations are explored. Optical designs of three self-collimating conjugate correction lenses and Offner null test are given. The difference of conjugate correction test is compared with classic test or null compensation test. According to theory analysis, the mathematical expression of conjugate correction aspherical test includes the cases of classic aspheric test and null compensation aspheric test. And the mathematical expression of classic aspheric test and null compensation aspheric test is a special case of the conjugate correction aspheric test.
The technology of integrating mechanical FEA analysis with optical estimation is essential to simulate the gravity deformation of large main mirror and the thermal deformation such as static or temperature gradient of optical structure. We present the simulation results of FEA analysis, data processing, and image performance. Three kinds of support structure for large primary mirror which have the center holding structure, the edge glue fixation and back support, are designed and compared to get the optimal gravity deformation. Variable mirror materials Zerodur/SiC are chosen and analyzed to obtain the small thermal gradient distortion. The simulation accuracy is dependent on FEA mesh quality, the load definition of structure, the fitting error from discrete data to smooth surface. A main mirror with 1m diameter is designed as an example. The appropriate structure material to match mirror, the central supporting structure, and the key aspects of FEA simulation are optimized for space application.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.