Imaging performance and test of extreme ultraviolet telescope

Lin Yang; Tiangang Cui; Bo Chen

doi:10.1117/12.824549

31 August 2009 Imaging performance and test of extreme ultraviolet telescope

Lin Yang, Tiangang Cui, Bo Chen

Proceedings Volume 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV; 74371R (2009) https://doi.org/10.1117/12.824549
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

The Extreme Ultraviolet Telescope (EUT) is composed of a set of four individual normal incidence multilayer-coated telescopes that obtained selected spectrum bandpass (131 A-304 A) of the solar atmosphere. Before the launch, it is necessary to calibrate the imaging performance of EUT. We build a test system for EUT by two ways. Resolution test was performed using 1951 Standard Air Force High Resolution Test target, and the optical resolution limits down to 0.96arc-second at 404.7nm. A pinhole as a target placed on the focal point of a collimator is illuminated mercury lump. The intensity distribution is obtained by knife-edge scanning with low noise photon-counting detector. The slope of the knife-edge scan is equal to the value of the line spread function (LSF). Based on these measurement, we calculate the e modulation transfer function, which is highly closed to the simulation result of zemax. The experiment result indicates that the test system works well. For further work, the working wavelength test will be done with the help of those experiment results.

Citation Download Citation

Lin Yang, Tiangang Cui, and Bo Chen "Imaging performance and test of extreme ultraviolet telescope", Proc. SPIE 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV, 74371R (31 August 2009); https://doi.org/10.1117/12.824549

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