Canon Patent To Reduce Ghosting Artefacts

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]