Optical design of infrared continuous-zoom lenses
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Nanjing Research Institute of Electronics Technology,Nanjing Institute of Optics & Technology

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    Abstract:

    An infrared continuous zoom system is designed. The simple system has a large relative aperture with high transmittance, large continuous zoom ratio, and wide wave band. By introducing a diffractive surface and an aspheric surface, the modulation transfer function (MTF) of the system is above 0.6 for all continuous zoom ratios at the spatial frequency of 14lp/mm. As the system only contains 4 lenses, the transmittance is higher than 80%, and the zoom ratio of the system could also reach 8 continuously. As the color and the off-axis aberration are well corrected, the experiment indicates that the image quality of the continuous zoom system is pretty well.

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XUE Hui, LI Chang-Wei. Optical design of infrared continuous-zoom lenses[J]. Journal of Infrared and Millimeter Waves,2012,31(5):421~424

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History
  • Received:October 22,2011
  • Revised:December 05,2011
  • Adopted:December 23,2011
  • Online: October 31,2012
  • Published: