Fabrication and testing of grazing incidence x-ray imaging telescope aspherical objective barrel to be used in astronomical satellite

Changxin Zhou; Xiangsong Miao

doi:10.1117/12.19240

1 July 1990 Fabrication and testing of grazing incidence x-ray imaging telescope aspherical objective barrel to be used in astronomical satellite

Changxin Zhou, Xiangsong Miao

Author Affiliations +

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19240
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

The objective of x-ray imaging telescope to be used for observing flares and sun- spOt8 of the sun, which is aboard on astronomic satellite, is developed accoding to chinese space science developmerm plan, it consists or two aspherical barrels which is made from metal material. The requirement of accuracy for surface fiqure of the mi- rror is A/5, surface roughness is ioA RMS, the roundness of inner diameter is 0.5 ,m. The coinbinatory barrel is made of aluminium alloy, plating electronless nickel on ml- rror surface after machining, and then doing superprecision processing by superpreci- sion diamondturningmachine tool, finally doing grinding and polishing. In order to provent deformation of workpice from mounting and clamping, it would effect the ac- curacy of surface figure, so we adopted the method of floating grinding and polishing. The paper related mechanical and optical processing technologies of the barrel, and facilities, and went into details on supersmooth polishing processing s well as the testing methods of the accuracy of surface figure and surface roughness, Final mea- cured results indicate clearly the geomtric precision of combinatory barrel, and sur- face figure, and surface roughness of the mirror have achieved design requirements el- ementaly.

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Changxin Zhou and Xiangsong Miao "Fabrication and testing of grazing incidence x-ray imaging telescope aspherical objective barrel to be used in astronomical satellite", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19240

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