An optical imaging lens, including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, and a ninth lens element disposed in sequence from an object side to an image side along an optical axis. An optical axis region of the object-side surface of the second lens element is convex. The fourth lens element has positive refracting power, and a periphery region of the image-side surface of the fourth lens element is concave. A periphery region of the object-side surface of the fifth lens element is concave. The seventh lens element has positive refracting power.

An optical imaging lens, including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, and a ninth lens element disposed in sequence from an object side to an image side along an optical axis. An optical axis region of the object-side surface of the second lens element is convex. The fourth lens element has positive refracting power, and a periphery region of the image-side surface of the fourth lens element is concave. A periphery region of the object-side surface of the fifth lens element is concave. The seventh lens element has positive refracting power.

An optical system includes a first through six lenses. The first lens includes a positive refractive power. The second lens includes a negative refractive power. The third lens includes a positive refractive power. The fourth lens includes a negative refractive power and the fifth lens includes a negative refractive power. The sixth lens includes a positive refractive power and an inflection point formed on an image-side surface thereof and 70<FOV is satisfied, where FOV is a field of view of the optical system.

Provided an imaging apparatus including a first optical device, a second optical device disposed such that light transmitted through the first optical device is incident on the second optical device, and a third optical device disposed such that light transmitted through the second optical device is incident on the third optical device, wherein at least one of the first optical device, the second optical device, and the third optical device includes a plurality of nanostructures, and heights of at least two nanostructures of the plurality of nanostructures are different from each other.

Provided an imaging apparatus including a first optical device, a second optical device disposed such that light transmitted through the first optical device is incident on the second optical device, and a third optical device disposed such that light transmitted through the second optical device is incident on the third optical device, wherein at least one of the first optical device, the second optical device, and the third optical device includes a plurality of nanostructures, and heights of at least two nanostructures of the plurality of nanostructures are different from each other.

Provided is a camera optical lens including, sequentially from an object side to an image side: a first lens having a negative refractive power; a second lens having a refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. At least one of the first to seventh lenses comprises a free-form surface. The camera optical lens satisfies following conditions: −3.00≤f4/f3≤−1.00; 2.90≤d9/d10≤8.50; and 2.00≤d11/d12≤15.00. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses.

Provided is a camera optical lens including, sequentially from an object side to an image side: a first lens having a negative refractive power; a second lens having a refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. At least one of the first to seventh lenses comprises a free-form surface. The camera optical lens satisfies following conditions: −3.00≤f4/f3≤−1.00; 2.90≤d9/d10≤8.50; and 2.00≤d11/d12≤15.00. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses.

A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<|ff/f1|<3 are satisfied.

This disclosure discloses an optical imaging lens assembly, sequentially arranged from an object side to an image side along an optical axis, comprising: the first lens element with positive refractive power, the second lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the third lens element with positive refractive power, the fourth lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the fifth lens element with refractive power having a concave image-side surface, and both object-side surface and image-side surface being aspheric, wherein a stop and an image sensor disposed on an image plane are also provided. By such arrangements, the image pickup optical system satisfies conditions related to shorten the total length and to reduce the sensitivity for use in compact cameras and mobile phones with camera functionalities.

This disclosure discloses an optical imaging lens assembly, sequentially arranged from an object side to an image side along an optical axis, comprising: the first lens element with positive refractive power, the second lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the third lens element with positive refractive power, the fourth lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the fifth lens element with refractive power having a concave image-side surface, and both object-side surface and image-side surface being aspheric, wherein a stop and an image sensor disposed on an image plane are also provided. By such arrangements, the image pickup optical system satisfies conditions related to shorten the total length and to reduce the sensitivity for use in compact cameras and mobile phones with camera functionalities.