Abstract: An ocular optical system for imaging of imaging rays entering an eye of an observer via the ocular optical system from a display screen is provided. A side facing towards the eye is an eye-side, and a side facing towards the display screen is a display-side. The ocular optical system includes a first lens element, a second lens element, and a third lens element from the eye-side to the display-side in order along an optical axis. The first lens element, the second lens element, and the third lens element each include an eye-side surface and a display-side surface. The ocular optical system satisfies: 40°??, where ? represents a half apparent field of view, which is one half the field of view of an observer.

Abstract: An optical imaging lens includes six lens elements. The object-side surface of the second lens element comprises a convex portion in a vicinity of a periphery, the third lens element has positive refractive power and the image-side surface comprises a convex portion in a vicinity of a periphery, the image-side surface of the fifth lens element comprises a convex portion in a vicinity of an optical axis, and the image-side surface of the sixth lens element comprises a concave portion in a vicinity of an optical axis and a convex portion in a vicinity of a periphery. The optical imaging lens as a whole has only the six lens elements. A distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element is TL, a central thickness of the sixth lens element along the optical axis is CT6, and 7.6?TL/CT6.

Abstract: An optical imaging lens includes six lens elements. The object-side surface of the second lens element comprises a convex portion in a vicinity of a periphery, the third lens element has positive refractive power and the image-side surface comprises a convex portion in a vicinity of a periphery, the image-side surface of the fifth lens element comprises a convex portion in a vicinity of an optical axis, and the image-side surface of the sixth lens element comprises a concave portion in a vicinity of an optical axis and a convex portion in a vicinity of a periphery. The optical imaging lens as a whole has only the six lens elements. A distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element is TL, a central thickness of the sixth lens element along the optical axis is CT6, and 7.6?TL/CT6.

Abstract: An optical imaging lens includes five lens elements arranged from an object side to an image side in a given order along an optical axis of the optical imaging lens. The object-side surface of the second lens element has a convex portion in a vicinity of its periphery, the object-side surface of the third lens element has a convex portion in a vicinity of the optical axis, the object-side surface of the fourth lens element has a concave portion in a vicinity of its periphery, the optical imaging lens as a whole has only the five lens elements, and an effective system focal length is EFL, an air gap between the second lens element and the third lens element along the optical axis is G23, a central thickness of the third lens element along the optical axis is T3, and EFL, G23 and T3 satisfy the equation 4.89?EFL/(G23+T3)?5.88.

Abstract: An ocular optical system configured to allow imaging rays from a display image to enter an observer's eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of the eye-side surface of the first lens element is concave. An optical axis region of the eye-side surface of the second lens element is concave.

Abstract: An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, disposed sequentially from an object side to an image side, each of the lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the first lens element comprises a concave portion in a vicinity of an optical axis. The object-side surface of the third lens element comprises a concave portion in a vicinity of a periphery of the third lens element. The object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis. The lens elements of the optical imaging lens as a whole are only the six lens elements.

Abstract: An imaging lens includes a first lens element, a second lens element, a third lens element, and a fourth lens element arranged from an object side to an image side in the given order. The image-side surface of the first lens element comprises a convex portion in a vicinity of a periphery of the first lens element. The imaging lens has a system length less than 3.0 mm. The imaging lens does not have any lens element with refractive power other than the first, second, third, and fourth lens elements.

Abstract: An optical imaging lens comprises first, second, third, fourth, fifth and sixth lens elements arranged sequentially from an object side to an image side along an optical axis. The object-side surface of the second lens element has a concave portion in the vicinity of a periphery of the second lens element, and the image-side surface of the second lens element has a concave portion in a vicinity of the optical axis. The image-side surface of the third lens element has a concave portion in the vicinity of a periphery of the third lens element. An effective focal length of the optical imaging lens is EFL, an air gap between the fourth lens element and the fifth lens element along the optical axis is G45, a central thickness of the sixth lens element along the optical axis is represented by T6, and EFL, G45 and T6 satisfy the equation: EFL/(G45+T6)?6.40.

Abstract: An optical imaging lens includes six lens elements positioned sequentially from an object side to an image side along an optical axis. The image-side surface of the first lens element has a concave portion in a vicinity of the periphery of the first lens element and the object-side surface of the sixth lens element has a convex portion in a vicinity of the periphery of the sixth lens element. Gaa is a sum of all five air gaps from the first lens element to the sixth lens element along the optical axis, T5 is a central thickness of the fifth lens element along the optical axis, and Gaa and T5 satisfy the equation Gaa/T5?3.85.

Abstract: An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, disposed sequentially from an object side to an image side, each of the lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the first lens element comprises a concave portion in a vicinity of an optical axis. The object-side surface of the third lens element comprises a concave portion in a vicinity of a periphery of the third lens element. The object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis. The lens elements of the optical imaging lens as a whole are only the six lens elements.

Abstract: An optical lens assembly is provided. The optical lens assembly includes first, second, third and fourth lens elements having refracting power arranged along an optical axis in a sequence from a light output side to a light input side. The first lens element is arranged to be a lens element in a fourth order from the light input side to the light output side. The second lens element is arranged to be a lens element in a third order from the light input side to the light output side. The third lens element is arranged to be a lens element in a second order from the light input side to the light output side. The fourth lens element is arranged to be a lens element in a first order from the light input side to the light output side.

Abstract: An ocular optical system configured to allow imaging rays from a display image to enter an observer’s eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of the eye-side surface of the first lens element is concave. An optical axis region of the eye-side surface of the second lens element is concave.

Abstract: Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises five lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

Abstract: An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, each having an object-side surface facing toward an object side and an image-side surface facing toward an image side. The image-side surface of the first lens element includes a concave portion in a vicinity of a periphery of the first lens element. The optical imaging lens as a whole has only the six lens elements having refractive power. The ratio between the f-number of the optical imaging lens and thicknesses of the lens elements satisfies certain relations.

Abstract: An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, disposed sequentially from an object side to an image side, each of the lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the first lens element comprises a concave portion in a vicinity of an optical axis. The object-side surface of the third lens element comprises a concave portion in a vicinity of a periphery of the third lens element. The object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis. The lens elements of the optical imaging lens as a whole are only the six lens elements.

Abstract: An imaging lens includes first to sixth lens elements having refractive power and arranged in order from an object side to an image side along an optical axis of the imaging lens. Through designs of surfaces of the lens elements and relevant optical parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An ocular optical system configured to allow imaging rays from a display image to enter an observer's eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of the eye-side surface of the first lens element is concave. An optical axis region of the eye-side surface of the second lens element is concave.

Abstract: An optical imaging lens system includes four lens elements arranged along an optical axis. The optical imaging lens system satisfies the relations 2.13°?HFOV/Fno?8.75°; 3.85?TTL/T1?7.00; and 0.8?AC34/T3, where a half field of view of the optical imaging lens system is defined as HFOV, an F number of the optical imaging lens system is defined as Fno, a distance measured from the object-side surface of the first lens element to an image plane along the optical axis is defined as TTL, a thickness of the first lens element along the optical axis is defined as T1, an air gap between the third and fourth lens elements along the optical axis is defined as AC34, a thickness of the third lens element along the optical axis is defined as T3.

Abstract: An optical imaging lens includes five lens elements arranged from an object side to an image side in a given order along an optical axis of the optical imaging lens. The object-side surface of the second lens element has a convex portion in a vicinity of its periphery, the object -side surface of the third lens element has a convex portion in a vicinity of the optical axis, the object-side surface of the fourth lens element has a concave portion in a vicinity of its periphery, the optical imaging lens as a whole has only the five lens elements, and an effective system focal length is EFL, an air gap between the second lens element and the third lens element along the optical axis is G23, a central thickness of the third lens element along the optical axis is T3, and EFL, G23 and T3 satisfy the equation 4.89?EFL/(G23+T3)?5.88.

Abstract: An ocular optical system for imaging of imaging rays entering an eye of an observer via the ocular optical system from a display screen is provided. A side facing towards the eye is an eye-side, and a side facing towards the display screen is a display-side. The ocular optical system includes a first lens element, a second lens element, and a third lens element from the eye-side to the display-side in order along an optical axis. The first lens element, the second lens element, and the third lens element each include an eye-side surface and a display-side surface. The ocular optical system satisfies: 40°??, where ? represents a half apparent field of view, which is one half the field of view of an observer.