Optical lens
AssigneeAbility Enterprise Co., Ltd.
InventorsJung-Yao Chen, Yu-Min Chang, Shuo-Hsien Cheng
Life of this patent
Estimating the term…
Abstract
An optical lens is provided. The optical lens includes, in order from an object side to an image-forming side, a first lens having negative refractive power, a second lens having negative refractive power, a third lens having refractive power and having an Abbe number Vd3, a cemented lens having refractive power, and a fourth lens having refractive power and having an Abbe number Vd4, wherein 15≦Vd3 and/or Vd3≦30, and 60≦Vd4 and/or Vd4≦85.
Claims20
An optical lens, in order from an object side to an image-forming side, at least comprising:
- a first lens having negative refractive power;
- a second lens having negative refractive power;
- a third lens having refractive power and having an Abbe number Vd3, and 15≦Vd3 and/or Vd3≦30;
- a cemented lens having refractive power;
- and
- a fourth lens having refractive power and having an Abbe number Vd4, and 60≦Vd4 and/or Vd4≦85.
An optical lens, in order from an object side to an image-forming side, at least comprising:
- a first lens having negative refractive power;
- a second lens having refractive power;
- a third lens having an Abbe number Vd3, the third lens is a biconvex lens, and 15≦Vd3 and/or Vd3≦30;
- a cemented lens having refractive power;
- and
- a fourth lens having an Abbe number Vd4, the fourth lens is a biconvex lens, and 60≦Vd4 and/or Vd4≦85.
An optical lens, in order from an object side to an image-forming side, at least comprising:
- a first lens having negative refractive power;
- a second lens having refractive power;
- a third lens having an Abbe number Vd3, and 15≦Vd3 and/or Vd3≦30;
- a cemented lens having refractive power;
- and
- a fourth lens having an Abbe number Vd4, and 60≦Vd4 and/or Vd4≦85;
- wherein the third lens has positive refractive power and/or the fourth lens has positive refractive power.
Dependencies are inferred from the claim text.