Volume 3Issue 6
Dec. 2010
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ZHANG Yi-cha, LIU Wei, HU Chun-hui. Thermal-optical property of fore optical system in space hyper spectral imager[J]. Chinese Optics, 2010, 3(6): 572-579.
Citation: ZHANG Yi-cha, LIU Wei, HU Chun-hui. Thermal-optical property of fore optical system in space hyper spectral imager[J].Chinese Optics, 2010, 3(6): 572-579.

Thermal-optical property of fore optical system in space hyper spectral imager

  • Received Date:11 May 2010
  • Rev Recd Date:13 Jul 2010
  • Publish Date:20 Dec 2010
  • The performance of a hyper spectral imager is affected severely by the turbulence of orbit temperature, which would result in the thermal elastic deformation for the fore reflective telescope in the imager. Moreover, the thermal elastic deformation of mirrors, mechanical structure of the telescope, and the resulting displacements of the mirrors would induce defocusing. Based on the present study for a type of space hyper spectral imager, a model for simulating the thermal elastic deformation of the frontal telescope was built via Finite Element Method. By simulating, the surface deviation amounts and displacements of all the mirrors under different temperature loads were worked out, and the correlation between defocusing magnitude and temperature was obtained through calculating the resulting displacements of the mirrors. The analyzing results could be used as a reference for designing thermal controlling strategy and focusing system and for doing thermal-optical experiments of the developing imager.

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