The Measured Performance Of A Grazing Incidence Relay Optics Telescope For Solar X-Ray Astronomy

Dan Moses; Allen S. Krieger; John M. Davis

doi:10.1117/12.936632

12 August 1986 The Measured Performance Of A Grazing Incidence Relay Optics Telescope For Solar X-Ray Astronomy

Dan Moses, Allen S. Krieger, John M. Davis

Proceedings Volume 0691, X-Ray Imaging II; (1986) https://doi.org/10.1117/12.936632
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

Abstract

X-ray astronomy, both solar and celestial, requires long focal length optical systems to provide high spatial resolution images and to be used as feeds for spectrometers. In typical experimental situations, the physical size is restricted and grazing angles must be kept at or below one degree. Grazing incidence secondary optics are an alternative to long focal length primary mirrors. We have designed, fabricated and tested a system which employs a secondary with externally polished hyperboloid-hyperboloid surfaces. It is to be used in conjunction with an existing Wolter-I primary. The system has been designed for high resolution imaging of the solar corona with the goal of producing images electronically with the same spatial resolution as achieved at the primary focus with film. The secondary optic is located in front of the primary focus, as in a Galilean telescope, and provides a magnifi1ation of approximately four. The combined system has a plate scale of 26.0 pm (arc sec) , effective focal length 5.4 m, and is contained within an instrument length of 1.9 m. The design, tolerance specification and fabrication techniques are described. The performance of the system at X-ray wavelengths has been determined experimentally and is compared with theoretical results produced by ray tracing.

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Dan Moses, Allen S. Krieger, and John M. Davis "The Measured Performance Of A Grazing Incidence Relay Optics Telescope For Solar X-Ray Astronomy", Proc. SPIE 0691, X-Ray Imaging II, (12 August 1986); https://doi.org/10.1117/12.936632

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