Imaging lens system
AssigneesSamsung Electro-Mechanics Co., Ltd., Kumoh National Institute of Technology Industry-Academic Cooperation Foundation
InventorsTae Yeon Lim, Yong Joo Jo, Phil Ho Jung, Jae Myung Ryu
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, sequentially disposed from an object side. A field of view (FOV) of the imaging lens system according to an embodiment is wider than 85 degrees and narrower than 160 degrees. In the imaging lens system according to an embodiment, a distance (TTL) from an object-side surface of the first lens to an imaging plane is greater than 6.0 mm and less than 9.0 mm.
Claims21
An imaging lens system, comprising:
- a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, sequentially disposed from an object side,
- wherein the imaging lens system comprises a total of seven lenses with refractive power,
- wherein the fourth lens has a convex object-side surface, the fifth lens has a convex object-side surface and a concave image-side surface, and the seventh lens has a convex object-side surface in a paraxial region,
- wherein a field of view (FOV) is wider than 85 degrees and narrower than 160 degrees,
- wherein a distance (TTL) from an object-side surface of the first lens to an imaging plane is greater than 6.0 mm and less than 9.0 mm, and
- wherein 1.0<TTLw/TTLt<1.1,
- where TTLw is a distance from an object-side surface of the first lens to the imaging plane in a wide-angle mode of the imaging lens system, and TTLt is a distance from an object-side surface of the first lens to the imaging plane in a telephoto mode of the imaging lens system.
An imaging lens system, comprising:
- a first lens having negative refractive power and a convex object-side surface;
- a second lens having negative refractive power and a convex object-side surface;
- a third lens having refractive power;
- a fourth lens having refractive power, a convex object-side surface, and a concave image-side surface;
- a fifth lens having refractive power;
- a sixth lens having refractive power and a concave object-side surface;
- and
- a seventh lens having negative refractive power and a convex object-side surface in a paraxial region,
- wherein the first to seventh lenses are sequentially disposed with an air gap from an object side, and the imaging lens system has a total of seven lenses with refractive power.
An imaging lens system, comprising:
- a first lens group, a second lens group, and a third lens group disposed on an optical axis in this order from an object side,
- wherein a first lens of the first lens group has a convex object-side surface,
- wherein the first lens group and the second lens group are movable relative to each other in an optical axis direction between a wide-angle mode position and a telephoto mode position,
- wherein a field of view (FOV) is wider than 80 degrees, and the imaging lens system has a total of seven lenses with refractive power, and
- wherein the second lens group comprises a second lens through a fourth lens, and the third lens group comprises a fifth lens through a seventh lens disposed in this order.
Dependencies are inferred from the claim text.