Imaging lens system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsSang Hyun Jang, Ki Jin Nam, Yong Joo Jo, Phil Ho Jung, Ju Hwa Son
Life of this patent
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Abstract
An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens disposed in order from an object side. In the imaging lens system, the first lens has positive refractive power and an object-side surface of the first lens is concave. A field of view of the imaging lens system is 100 degrees or more. In the imaging lens system, a distance TTL from the object-side surface of the first lens to an imaging plane and a height ImgH of the imaging plane satisfy TTL/ImgH<1.5.
Claims15
An imaging lens system comprising:
- a first lens having positive refractive power and comprising a concave object-side surface, a second lens having negative refractive power, a third lens, a fourth lens, a fifth lens having negative refractive power, a sixth lens comprising a concave image-side surface in a paraxial region, and a seventh lens disposed in order from an object side,
- wherein a field of view of the imaging lens system is 100 degrees or more, and
- wherein TTL/ImgH<1.5, where TTL is a distance from the object-side surface of the first lens to an imaging plane and ImgH is a height of the imaging plane.
An imaging lens system comprising:
- a plurality of lenses disposed on an object-side of an imaging plane, the plurality of lenses including a first lens, a second lens having negative refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens comprising a concave image-side surface in a paraxial region, and a seventh lens disposed in order from an object side,
- wherein
- −2.0<(ImgH/(f*tan(FOV/2))−1)*100<2.0, and
- TTL/ImgH<1.5,
- where ImgH is a height of the imaging plane, f is a focal length of the imaging lens system, FOV is a field of view of the imaging lens system, and TTL is a distance from an object-side surface of a lens, from among the plurality of lenses, disposed closest to the object side, to the imaging plane, and
- wherein a radius of curvature of an object-side surface of the second lens is greater than a radius of curvature of an object-side surface of the seventh lens.
Dependencies are inferred from the claim text.