Optical imaging system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsSeong Ho Hwang, Hyuk Joo Kim
Life of this patent
Estimating the term…
Abstract
An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens includes a negative refractive power, and the second lens includes a negative refractive power. The third lens includes a positive refractive power, and the fourth lens includes a positive refractive power, an object-side surface thereof being concave. The fifth lens includes a positive refractive power. The sixth lens includes a negative refractive power. The first to sixth lenses are sequentially disposed from an object side toward an imaging plane. One lens of the first to sixth lenses is cemented to a lens adjacent thereto.
Claims24
An optical imaging system comprising:
- a first lens having a negative refractive power;
- a second lens having a negative refractive power;
- a third lens having a positive refractive power and a refractive index of 1.9 or more;
- a fourth lens having a positive refractive power and a concave object-side surface in a paraxial region thereof;
- a fifth lens having a positive refractive power;
- and
- a sixth lens having a negative refractive power, a concave image-side surface in a paraxial region thereof, and a refractive index of 1.9 or more,
- wherein the first to sixth lenses are sequentially disposed in ascending numerical order from an object side of the optical imaging system toward an imaging plane of the optical imaging system,
- two lenses that are adjacent to each other among the first to sixth lenses are cemented to each other to form a cemented lens, and
- the third lens has a focal length in a range of 1.8 to 4.2 mm.
An optical imaging system comprising:
- a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed in ascending numerical order from an object side of the optical imaging system toward an imaging plane of the optical imaging system,
- wherein three lenses of the first to sixth lenses each have a positive refractive power,
- three other lenses of the first to sixth lenses each have a negative refractive power,
- two lenses that are adjacent to each other among the first to sixth lenses are cemented to each other to form a first cemented lens,
- two other lenses that are adjacent to each other among the first to sixth lenses are cemented to each other to form a second cemented lens,
- an image-side surface of the sixth lens is concave,
- the third lens has a refractive index of 1.9 or more,
- the sixth lens has a refractive index of 1.9 or more,
- the two lenses forming the first cemented lens have refractive powers having signs that are opposite to each other,
- the other two lenses forming the second cemented lens have refractive powers having signs that are opposite to each other, and
- the third lens has a focal length in a range of 1.8 to 4.2 mm.
Dependencies are inferred from the claim text.