Optical system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorIl Yong Park
Life of this patent
Estimating the term…
Abstract
An optical system includes a first lens including a negative refractive power and a convex object-side surface, a second lens, and a third lens including a negative refractive power and a convex object-side surface. The optical system also includes a fourth lens, a fifth lens including a negative refractive power, and a sixth lens including a negative refractive power and comprising an inflection point on an image-side surface thereof. The first to sixth lenses are sequentially disposed from an object toward an imaging plane.
Claims22
An optical system, comprising:
- a first lens comprising a negative refractive power and a convex object-side surface;
- a second lens comprising a convex image side surface in a paraxial region;
- a third lens comprising a negative refractive power and a convex object-side surface;
- a fourth lens comprising a concave object side surface in a paraxial region;
- a fifth lens comprising a negative refractive power and a concave image side surface in a paraxial region;
- and
- a sixth lens comprising a negative refractive power and comprising an inflection point on an image-side surface thereof,
- wherein the first to sixth lenses are sequentially disposed from an object toward an imaging plane.
An optical system, comprising:
- a first lens comprising a negative refractive power and a convex object-side surface;
- a second lens comprising a convex object-side surface and a convex image-side surface in a paraxial region;
- a third lens having a negative refractive power;
- a fourth lens comprising a concave object-side surface in a paraxial region;
- a fifth lens comprising a negative refractive power;
- and
- a sixth lens comprises an inflection point formed on an image-side surface thereof,
- wherein the first to sixth lenses are sequentially disposed from an object toward an imaging plane, and
- wherein f5/f<−10;
- where f5 is a focal length of the fifth lens and f is an overall focal length of the optical system.
An optical system, comprising:
- a first lens comprising a convex object-side surface and a concave image-side surface;
- a second lens comprising a convex object-side surface and a convex image-side surface in a paraxial region;
- a third lens comprising a convex object-side surface and a concave image-side surface;
- a fourth lens comprising a concave object-side surface in a paraxial region and a convex image-side surface;
- a fifth lens comprising a concave object-side surface and a concave image-side surface in a paraxial region;
- and
- a sixth lens, wherein
- the second lens is formed of a material that is substantially same as that of the first lens,
- the third lens, the fourth lens, and the fifth lens each have a refractive index higher than the refractive indices of each of the first and second lenses, and
- the sixth lens has a refractive index lower than the refractive indices of each of the first and second lenses.
Dependencies are inferred from the claim text.