Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorYong Joo Jo
Life of this patent
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Abstract
An optical imaging system includes a first lens having a positive refractive power, an object-side surface wherein an object-side surface of the first lens is convex and an image-side surface of the first lens is concave, a second lens having a negative refractive power, wherein an image-side surface of the second lens is concave, a third lens having a negative refractive power, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power, wherein the first to fifth lenses are sequentially disposed from an object side toward an imaging plane.
Claims8
An optical imaging system comprising:
- a first lens comprising a positive refractive power, wherein an object-side surface of the first lens is convex;
- a second lens comprising a negative refractive power, wherein an image-side surface of the second lens is concave;
- a third lens comprising refractive power, wherein an object-side surface of the third lens is convex;
- a fourth lens comprising refractive power, wherein an object-side surface of the fourth lens is concave;
- and
- a fifth lens comprising refractive power, wherein an object-side surface of the fifth lens is concave and an image-side surface of the fifth lens is convex in a paraxial portion,
- wherein the first to fifth lenses are sequentially disposed from an object side of the optical imaging system, towards an imaging plane
- where 0.70<TTL/f<1.1, in which TTL is a distance of the object-side surface of the first lens to the imaging plane, and f is an overall focal length of the optical imaging system, and
- a focal length f1 of the first lens is in a range of 2.50 to 3.00.
Dependencies are inferred from the claim text.