Optical system for camera
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorKyu Min Chae
Life of this patent
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Abstract
Disclosed herein is an optical system for a camera. The optical system for a camera includes: a first lens having positive refractive power and a meniscus shape concave toward an image; a second lens having negative refractive power and a shape concave toward the image; a third lens having the positive refractive power and a shape convex toward an object; a fourth lens having the positive refractive power and a shape convex toward the image; and a fifth lens having the negative refractive power, a shape convex toward the object and concave to the image, and one or more inflection point provided on an image surface.
Claims30
An optical system, comprising
- a first lens having positive refractive power and being convex toward an object side;
- a second lens having negative refractive power and being concave toward an image side;
- a third lens having positive refractive power and being biconvex;
- a fourth lens having positive refractive power and being convex toward the image side;
- a fifth lens having negative refractive power and being convex in the center toward the object side and concave in the center toward the image side, the fifth lens having at least one inflection point on an image-side surface;
- and
- an aperture stop disposed in front of the first lens to adjust a light amount,
- wherein the optical system satisfies the following conditional expression:
- 1.744≦r1≦1.938
- 1.658≦r4≦3.145
- where r1 is a radius of curvature of an object-side surface of the first lens and r4 is a radius of curvature of an image-side surface of the second lens, and
- wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are arranged in order from the object side to the image side.
An optical system, comprising
- a first lens having positive refractive power and comprising a convex surface on an object side;
- a second lens having negative refractive power and comprising a concave surface on an image side;
- a third lens having positive refractive power and a biconvex shape;
- a fourth lens having positive refractive power and a meniscus shape being concave toward the object side and convex toward the image side;
- and
- a fifth lens having negative refractive power and comprising:
- an object-side surface being convex in the center and concave at the periphery;
- and
- an image-side surface being concave in the center and convex at the periphery, wherein the optical system satisfies the following conditional expression:
- 1.744≦r1≦1.938
- 1.658≦r4≦3.145
- where r1 is a radius of curvature of an object-side surface of the first lens and r4 is a radius of curvature of an image-side surface of the second lens,
- wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lenses are arranged in order from the object side to the image side, and
- wherein the convex surface of the first lens, the concave surface of the second lens, the biconvex shape of the third lens, and the meniscus shape of the fourth lens are arranged on an optical axis.
Dependencies are inferred from the claim text.