Zoom lens

Zoom lens

  • CN 1,611,976 A
  • Filed: 10/29/2004
  • Published: 05/04/2005
  • Est. Priority Date: 10/29/2003
  • Status: Active Application
First Claim
Patent Images

1. zoom lens comprise being arranged in order from the thing side:

  • First lens combination with positive refraction,Second lens combination with negative refraction,The 3rd lens combination with positive refraction, andThe 4th lens combination with positive refraction,Wherein when the lens position situation from the wide-angle side state when burnt end state far away changes, first lens combination and the 3rd lens combination are fixed on the precalculated position on the optical axis direction, when second lens combination to picture during side shifting, the shift in position of the picture of generation is compensated by moving of the 4th lens combination second lens combination moves after;

    Wherein when the lens position situation changes, be configured in the thing side of the 3rd lens combination along the aperture diaphragm of optical axis direction setting;

    AndWherein the 3rd lens combination is made up of balsaming lens that is arranged in order from the thing side and positive lens, and this balsaming lens comprises the negative lens of convex surface towards the positive lens of thing side and concave surface towards the picture side.

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