18339262. ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME simplified abstract (CANON KABUSHIKI KAISHA)

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ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME

Organization Name

CANON KABUSHIKI KAISHA

Inventor(s)

Takashi Okada of Saitama (JP)

ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A simplified explanation of the abstract

This abstract first appeared for US patent application 18339262 titled 'ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME

Simplified Explanation

The abstract describes a zoom lens that consists of a first lens unit with negative refractive power and a second lens unit with positive refractive power. The distance between adjacent lens units changes during zooming from wide-angle to telephoto. The first lens unit moves from the image side to the object side during zooming. The first lens unit includes at least four lenses, including a first negative meniscus lens and a second negative meniscus lens, both with convex surfaces facing the object side.

  • The zoom lens has a first lens unit with negative refractive power and a second lens unit with positive refractive power.
  • The distance between lens units changes during zooming from wide-angle to telephoto.
  • The first lens unit moves from the image side to the object side during zooming.
  • The first lens unit includes at least four lenses, including a first negative meniscus lens and a second negative meniscus lens, both with convex surfaces facing the object side.
  • The invention satisfies a predetermined condition.

Potential applications of this technology:

  • Camera lenses: The zoom lens design can be used in camera lenses to provide adjustable focal length and zoom capabilities.
  • Binoculars and telescopes: The zoom lens can be applied to binoculars and telescopes to allow users to adjust the magnification and field of view.

Problems solved by this technology:

  • Variable focal length: The zoom lens solves the problem of fixed focal length by allowing users to adjust the focal length according to their needs.
  • Versatility: The zoom lens provides versatility in capturing different types of images by offering a range of focal lengths.

Benefits of this technology:

  • Flexibility: The zoom lens provides flexibility in capturing images at various distances without the need to change lenses.
  • Compact design: The zoom lens design allows for a compact and lightweight construction, making it suitable for portable devices such as cameras and smartphones.
  • Improved image quality: The use of multiple lenses and the ability to adjust focal length contribute to improved image quality and sharpness.


Original Abstract Submitted

A zoom lens includes, in order from the object side to the image side, a first lens unit having negative refractive power, a second lens unit having positive refractive power. A distance between adjacent lens units changes during zooming from a wide-angle end to a telephoto end. During zooming from the wide-angle end to the telephoto end, the first lens unit moves to the image side and then to the object side. The first lens unit includes four lenses or more, the four lenses or more including, in order from the object side to the image side, a first negative meniscus lens with a convex surface facing the object side and a second negative meniscus lens with a convex surface facing the object side. A predetermined condition is satisfied.

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