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Taking lens apparatus

  • US 20040246362A1
  • Filed: 07/29/2003
  • Published: 12/09/2004
  • Est. Priority Date: 05/12/2003
  • Status: Active Grant
First Claim
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1. A taking lens apparatus comprising:

  • a zoom lens system that is composed of a plurality of lens units and that achieves zooming by varying distances between the lens units; and

    an image sensor that converts an optical image formed by the zoom lens system into an electrical signal;

    wherein the zoom lens system comprises;

    a first lens unit that is disposed at an object-side end of the zoom lens system, that has a negative optical power as a whole, and that remains stationary relative to the image sensor during zooming of the zoom lens system;

    a second lens unit that is disposed on an image-sensor side of the first lens unit with a variable aerial distance secured in between, that has a positive optical power as a whole, and that moves toward an object side during zooming of the zoom lens system from a wide-angle end to a telephoto end; and

    a third lens unit that is disposed on an image-sensor side of the second lens unit with a variable aerial distance secured in between, that has a positive optical power as a whole, and that moves toward an image side during initial zooming from the wide-angle end to the telelphoto end.

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