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Canon Patent To Reduce Ghosting Artefacts

2014_207253_fig01

Egami (translated) spotted a patent filed by Canon to reduce ghosting artefacts by a new engineering of the micro-lenses (that stay above of the pixel sensors). If I got the patent right, a reverse-phase layer is applied on the micro-lens.

Machine translated patent description:

  • Patent Publication No. 2014-207253
    • Published 2014.10.30
    • Filing date 2012.4.17
  • Challenge
    • Micro-lens is a positive phase structure are aligned periodically
    • Periodic phase structure, the incident light is reflected and diffracted
    • Angle of incidence of the reflected diffracted light is unexpected, UV IRCF is reflected in ghost to generate and produce a red regular pattern
  • Canon patent of
    • Another of the members on top of the micro-lens
    • Phase structure of the member
      • Reverse of the phase structure of the micro-lens
      • Negative refractive power
      • It does not have a refractive power
      • Short form and trapezoidal cross-sectional shape
    • And reflected and diffracted light of the sensor surface (concave), offset by the reflected and diffracted light of the micro-lens (convex)
[via Egami]
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