Patent ID: 11899188
Assignee: YOUNG OPTICS INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. The optical lens system as claimed in claim 10, wherein the optical lens system satisfies one of the following conditions:
(1) the first lens group has three lenses with refractive powers of negative, positive and positive in order from the magnified side to the minified side;
(2) the first lens group has three lenses with refractive powers of negative, negative and positive in order from the magnified side to the minified side;
(3) the first lens group has four lenses with refractive powers of positive, negative, negative and positive in order from the magified side to the minified side;
(4) the second lens group has five lenses with refractive power of positive, negative, negative, positive and positive in order from the magnified side to the minified side;
(5) the second lens group has six lenses with refractive powers of positive, positive, negative, negative, positive and positive in order from the magnified side to the minified side.