Volume 4 Issue 4
Aug.  2011
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ZHANG Xin, JIA Hong-guang. Optical design of infrared athermalized objective with large relative aperture[J]. Chinese Optics, 2011, 4(4): 374-379.
Citation: ZHANG Xin, JIA Hong-guang. Optical design of infrared athermalized objective with large relative aperture[J]. Chinese Optics, 2011, 4(4): 374-379.

Optical design of infrared athermalized objective with large relative aperture

  • Received Date: 16 Apr 2011
  • Rev Recd Date: 17 Jul 2011
  • Publish Date: 25 Aug 2011
  • A design method for the optical system with a large relative aperture was researched and the initial optical power distribution of optical lenses was discussed. A F/0.9 infrared athermalized objective with a large relative aperture was proposed. Firstly, an athermal design model for the multiple-lens composed optical system was established. Then, by considering the systematic structure form and the selected optical materials, the initial optical power distribution among the lenses was accomplished. Finally, the aberration of the design was corrected by computer aid optimization design. The analysis of environment temperature shows that the image quality of the objective is stable in the change of temperature from 40 ℃ to 60 ℃ and its Modulation Transfer Function(MTF) approximates to the diffraction limit. The result of the implemented design agrees well with that of the theoretic computation.

     

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