Optical system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorYong Joo JO
Life of this patent
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Abstract
An optical system includes: a first lens having refractive power; a second lens having refractive power; a third lens having refractive power and comprising an image-side surface which is convex in a paraxial region; a fourth lens having refractive power; a fifth lens having refractive power and comprising an image-side surface which is concave in the paraxial region; a sixth lens having refractive power; and a stop disposed in front of an object-side surface of the first lens. The first to sixth lenses are sequentially disposed from an object side. A radius of the stop SD and an overall focal length of the optical system f satisfy: 0.2<SD/f<0.6. An aberration improvement effect and high degrees of resolution and brightness may be obtained.
Claims45
An optical system comprising:
- a first lens having refractive power;
- a second lens having refractive power;
- a third lens having refractive power and a convex image-side surface;
- a fourth lens having refractive power;
- a fifth lens having refractive power and a concave image-side surface;
- a sixth lens having refractive power;
- and
- a stop disposed in front of the first lens,
- wherein the first to sixth lenses are sequentially disposed from an object side, and
- wherein a radius of the stop SD and an overall focal length of the optical system f satisfy:
- 0.2<SD/f<0.6.
An optical system comprising:
- a first lens having refractive power;
- a second lens having refractive power;
- a third lens having refractive power and a convex image-side surface;
- a fourth lens having refractive power;
- and
- a fifth lens having refractive power and a concave image-side surface;
- and
- a sixth lens having refractive power,
- wherein the first to sixth lenses are sequentially disposed from an object side, and
- wherein an angle between a tangent line passing through an edge of an effective portion of the second lens and an imaging surface of an image sensor is 30 or less.
An optical system comprising:
- a first lens having refractive power;
- a second lens having refractive power and a convex object-side surface;
- a third lens having refractive power and a convex image-side surface;
- a fourth lens having refractive power;
- a fifth lens having negative refractive power and a concave image-side surface;
- and
- a sixth lens having positive refractive power,
- wherein the first to sixth lenses are sequentially disposed from an object side.
An optical system comprising:
- a stop, and first, second, third, fourth, fifth, and sixth lenses disposed sequentially from an object side, wherein a radius of the stop SD and an overall focal length of the optical system f satisfy:
- 0.2<SD/f<0.6.
Dependencies are inferred from the claim text.