Canon Patents

Patent: 10-22mm f/3.5-4.5 With a Liquid Element

A patent showing a 10-22 f/3.5-4.5 optical formula with a liquid element has shown up. I think it’s safe to say that this isn’t going to end up as a consumer product any time soon, but it’s still pretty interesting.

liquidelementpatent

  • Patent Publication No. 2014-145883 (Google Translated)
    • Published Date 2014.8.14
    • Filing date 2013.1.29
  • Example 4
    • Zoom ratio 2.07
    • Focal length f = 10.30-13.12-21.35mm
    • Fno. 3.23-3.62-4.63
    • Half angle ω = 52.86-46.03-32.50 °
    • Image height 13.60mm
    • The overall length of the lens 135.13-133.91-135.09mm
    • BF 0.15mm
  • Canon patents
    • And by varying the shape of the boundary surface, thereby changing the refractive power
    • Zooming, and has a refractive power element is positive, the element is negative
    • And reduce the variation of the curvature

Source: [EG] via [NL]

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