Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorIl Yong Park
Life of this patent
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Abstract
An optical imaging system includes a first lens having a concave image-side surface, a second lens having a concave image-side surface, and a third lens having a positive refractive power. The optical imaging system includes a fourth lens having a positive refractive power and a concave object-side surface, a fifth lens, a sixth lens having a positive refractive power, and a seventh lens having a concave object-side surface. The first lens to the seventh lens are sequentially disposed at intervals from an object side toward an imaging plane.
Claims17
An optical imaging system, comprising:
- a first lens comprising a positive refractive power and a concave image-side surface along an optical axis;
- a second lens comprising a negative refractive power and a concave image-side surface along the optical axis;
- a third lens comprising a positive refractive power;
- a fourth lens comprising a positive refractive power and a concave object-side surface along the optical axis;
- a fifth lens comprising a negative refractive power;
- a sixth lens comprising a positive refractive power;
- and
- a seventh lens comprising a negative refractive power and a convex object-side surface along the optical axis,
- wherein the first lens to the seventh lens are sequentially disposed from an object side toward an imaging plane, and
- wherein the optical imaging system comprises no more than seven lenses.
An optical imaging system, comprising:
- a first lens comprising a positive refractive power, a second lens comprising a negative refractive power, a third lens comprising a positive refractive power, a fourth lens comprising a positive refractive power and a concave object-side surface along an optical axis, a fifth lens comprising a negative refractive power, a sixth lens comprising a positive refractive power and a concave image-side surface along the optical axis, and a seventh lens comprising a negative refractive power, sequentially disposed from an object side toward an imaging plane,
- wherein the optical imaging system satisfies the following Conditional Expression:
- f2/f<−2.0
- where f represents an overall focal length of the optical imaging system and f2 is a focal length of the second lens.
An optical imaging system, comprising:
- a first lens comprising a positive refractive power, a second lens comprising a negative refractive power, a third lens comprising a positive refractive power, a fourth lens comprising a positive refractive power, a fifth lens comprising a negative refractive power, a sixth lens comprising a positive refractive power and a concave image-side surface along the optical axis, and a seventh lens comprising a negative refractive power, sequentially disposed from an object side toward an imaging plane,
- wherein the optical imaging system satisfies the following Conditional Expression:
- f2/f<−2.0
- where f represents an overall focal length of the optical imaging system and f2 is a focal length of the second lens, and
- wherein the optical imaging system satisfies the following Conditional Expression:
- 3.0<|f4/f|
- where f4 represents a focal length of the fourth lens.
Dependencies are inferred from the claim text.