Wide angle lens system and photographing apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorsYong-jae Lee, Young-woo Park
Life of this patent
Estimating the term…
Abstract
A wide angle lens system includes a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged from an object side. The first lens group includes a first lens of a meniscus shape having a convex surface toward the object side, a second lens having a concave surface toward the object side, and a third lens having a convex surface toward the object side, and the second lens group includes a fourth lens having a convex surface toward the object side, a fifth lens having a concave surface toward the object side, and a sixth lens of a meniscus shape having a concave surface toward the object side. A photographing apparatus includes the wide angle lens system.
Claims19
A wide angle lens system comprising:
- a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged from an object side,
- wherein the first lens group comprises a first lens of a meniscus shape having a convex surface toward the object side, a second lens having a concave surface toward the object side, and a third lens having a convex surface toward the object side, and the second lens group comprises a fourth lens having a convex surface toward the object side, a fifth lens having a concave surface toward the object side, and a sixth lens of a meniscus shape having a concave surface toward the object side, and
- the wide angle lens system satisfies the following expression,
- 0.60≦fall/Dall≦1.00,
- where fall denotes an effective focal length of the wide angle lens system, and Dall denotes a distance from a vertex of the surface of the first lens facing the object side to a vertex of a surface of the sixth lens facing an image side.
A photographing apparatus comprising:
- a wide angle lens system;
- and
- an imaging sensor that receives light focused by the wide angle lens system,
- wherein the wide angle lens system comprises a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged from an object side,
- the first lens group comprises a first lens of a meniscus shape having a convex surface toward the object side, a second lens having a concave surface toward the object side, and a third lens having a convex surface toward the object side, and the second lens group comprises a fourth lens having a convex surface toward the object side, a fifth lens having a concave surface toward the object side, and a sixth lens of a meniscus shape having a concave surface toward the object side, and
- the wide angle lens system satisfies the following expression,
- 0.60≦fall/Dall≦1.00,
- where fall denotes an effective focal length of the wide angle lens system, and Dall denotes a distance from a vertex of the surface of the first lens facing the object side to a vertex of a surface of the sixth lens facing an image side.
Dependencies are inferred from the claim text.