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Electro-optical imaging system and lens therefor

  • US 4,720,637 A
  • Filed: 06/19/1986
  • Issued: 01/19/1988
  • Est. Priority Date: 06/19/1986
  • Status: Expired due to Term
First Claim
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1. An electro-optical imaging system comprising:

  • an electronic image sensor responsive to radiation from a scene for producing an electrical output signal corresponding to scene radiation imaged thereon, said electronic image sensor having a Nyquist spatial frequency limit; and

    a lens for imaging scene radiation onto said electronic image sensor, said lens having rotationally symmetric aberrations over a range of apertures thereof for limiting its spatial frequency response over said range of apertures to a spatial frequency limit substantially equal to said Nyquist limit of said electronic image sensor to substantially eliminate undesirable image patterns due to aliasing.

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