Super macro lens

Super macro lens

CN
  • CN 103,823,292 A
  • Filed: 11/19/2013
  • Published: 05/28/2014
  • Est. Priority Date: 11/19/2013
  • Status: Active Application
First Claim
Patent Images

1. a super micro-lens, it is characterized in that:

  • the first lens group G1 that comprises successively positive diopter from object side to image planes side, at least two part compositions of negative dioptric the second lens combination G2, object from infinite distance when closely moving, described first lens group and the second lens combination move to realize focus from image side to object side, aforesaid first lens is main focus group, the second lens combination is auxiliary focus group, object from infinite in the time connecing recently, the amount of movement of first lens group G1 and the second lens combination G2 formula that meets the following conditions;

    0.5≤

    (A11/

    B11)/

    (A22/

    B22)≤

    1.5???(1)Wherein,A11;

    object is from infinite as far as photography enlargement ratio while being 1 times, the amount of movement of first lens group;

    B11;

    object is from infinite as far as photography enlargement ratio while being 1 times, the amount of movement of the second lens combination;

    A22;

    object is from infinite as far as photography enlargement ratio while being 2 times, the amount of movement of first lens group;

    B22;

    object is from infinite as far as photography enlargement ratio while being 2 times, the amount of movement of the second lens combination.

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