Optical system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorJin Hwa Jung
Life of this patent
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Abstract
There is provided an optical system including: a first lens having positive refractive power and having a convex object-side surface; a second lens having positive refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; and a seventh lens having negative refractive power and having a concave image-side surface, wherein the first to seventh lenses are sequentially disposed from an object side, whereby an aberration improvement effect may be increased and a high degree of resolution may be realized.
Claims14
An optical system comprising:
- a first lens having positive refractive power and comprising a convex object-side surface and a concave image-side surface;
- a second lens having refractive power;
- a third lens having refractive power and comprising a concave image-side surface;
- a fourth lens having positive refractive power;
- a fifth lens having negative refractive power;
- a sixth lens having positive refractive power;
- and
- a seventh lens having negative refractive power,
- wherein the first to seventh lenses are sequentially disposed from an object side, and
- wherein |(r7−r8)/(r7+r8)|<1.4 is satisfied, where r7 is a radius of curvature of an object-side surface of the fourth lens, and r8 is a radius of curvature of an image-side surface of the fourth lens.
Dependencies are inferred from the claim text.