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 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 optical imaging lens includes first, second, third, fourth and fifth lens elements arranged sequentially from an object side to an image side along an optical axis. The image-side surface of the first lens element comprises a concave portion in a vicinity of the optical axis. The object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis. The optical imaging lens as a whole has only the five lens elements having refractive power.

Abstract: An optical imaging lens including a first, a second, a third, a fourth, a fifth, and a sixth lens elements arranged in sequence from an object side to an image side. Each of the lens elements includes an object-side surface and an image-side surface. The first to sixth lens elements have refracting power. The second lens element has a negative refracting power. An optical axis region of the image-side surface of the third lens element is concave. There is no air gap between the fourth lens element and the fifth lens element. A ratio between a distance on an optical axis from the image-side surface of the first lens element to the object-side surface of the fourth lens element and a thickness of the first lens element along the optical axis is less than or equal to 3.000.

Abstract: An optical imaging lens including a first lens element, a second lens element, a third lens element, an aperture, a fourth lens element and a fifth lens element is provided. The first lens element is arranged to be a lens element of which refracting power being equal to 0 inverse millimeter (mm?1) in a first order from the object-side to the image-side. The second lens element is arranged to be a lens element having refracting power in a first order from the first lens element to the image-side. The third lens element is arranged to be a lens element having refracting power in a second order from the first lens element to the image-side. The fourth and fifth lens element are respectively arranged to be lens elements having refracting power in a first and a second order from the aperture to the image-side.

Abstract: An optical imaging lens includes first, second, third, fourth and fifth lens elements arranged sequentially from an object side to an image side along an optical axis. The image-side surface of the first lens element comprises a concave portion in a vicinity of the optical axis. The object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis. The optical imaging lens as a whole has only the five lens elements having refractive power.

Abstract: A communication device updating system includes a network switch, a plurality of first devices, and a second device. Each of the plurality of first devices is communicatively coupled to the network switch. The second device is communicatively coupled to the network switch, and is configured to store a communication device firmware file, wherein the second device multicasts the communication device firmware file to each of the plurality of first devices through the network switch, and each of the plurality of first devices is updated according to the received communication device firmware file.

Abstract: An optical imaging lens including a first lens element, a second lens element, a third lens element, an aperture, a fourth lens element and a fifth lens element is provided. The first lens element is arranged to be a lens element of which refracting power being equal to 0 inverse millimeter (mm?1) in a first order from the object-side to the image-side. The second lens element is arranged to be a lens element having refracting power in a first order from the first lens element to the image-side. The third lens element is arranged to be a lens element having refracting power in a second order from the first lens element to the image-side. The fourth and fifth lens element are respectively arranged to be lens elements having refracting power in a first and a second order from the aperture to the image-side.

Abstract: An optical imaging lens includes first, second, third, fourth and fifth lens elements arranged sequentially from an object side to an image side along an optical axis. The image-side surface of the first lens element comprises a convex portion in a vicinity of its periphery. The third lens element has negative power. The object-side surface of the fifth lens element comprises a concave portion in a vicinity of its periphery. The optical imaging lens as a whole has only the five lens elements having refractive power.

Abstract: The present disclosure provides for various embodiments of optical imaging lenses. An optical imaging lens may comprise six lens elements positioned in an order from an object side to an image side. By controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens may provide great view angle and proper length of the optical imaging lens and improve the imaging quality.

Abstract: The present disclosure provides for various embodiments of optical imaging lenses. An optical imaging lens may comprise at least five lens elements positioned in an order from an object side to an image side. By controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least an inequality, the optical imaging lens may exhibit better optical characteristics, the total length of the optical imaging lens may be shortened, and the view angle and f-number may also be improved.

Abstract: An optical imaging lens sequentially includes a first, a second, a third, a fourth, a fifth, and a sixth lens elements from an object side to an image side along an optical axis. Each of the lens elements includes an object-side surface and an image-side surface. The second lens element has negative refracting power. A periphery region of the object-side surface of the fourth lens element is convex. A periphery region of the image-side surface of the fifth lens element is convex. The optical imaging lens satisfies following conditions: HFOV?45°; 2.000?D1/D2, and TTL/T6?6.300.

Abstract: An optical imaging lens sequentially includes a first, a second, a third, a fourth, a fifth, and a sixth lens elements from an object side to an image side along an optical axis. Each of the lens elements includes an object-side surface and an image-side surface. The second lens element has negative refracting power. A periphery region of the object-side surface of the fourth lens element is convex. A periphery region of the image-side surface of the fifth lens element is convex. The optical imaging lens satisfies following conditions: HFOV?45°; 2.000?D1/D2, and TTL/T6?6.300.

Abstract: An optical imaging lens including a first, a second, a third, a fourth, a fifth, and a sixth lens elements arranged in sequence from an object side to an image side. Each of the lens elements includes an object-side surface and an image-side surface. The first to sixth lens elements have refracting power. The second lens element has a negative refracting power. An optical axis region of the image-side surface of the third lens element is concave. There is no air gap between the fourth lens element and the fifth lens element. A ratio between a distance on an optical axis from the image-side surface of the first lens element to the object-side surface of the fourth lens element and a thickness of the first lens element along the optical axis is less than or equal to 3.000.

Abstract: The present disclosure provides for various embodiments of optical imaging lenses. An optical imaging lens may comprise six lens elements positioned in an order from an object side to an image side. By controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens may provide great view angle and proper length of the optical imaging lens and improve the imaging quality.

Abstract: A communication device updating system includes a network switch, a plurality of first devices, and a second device. Each of the plurality of first devices is communicatively coupled to the network switch. The second device is communicatively coupled to the network switch, and is configured to store a communication device firmware file, wherein the second device multicasts the communication device firmware file to each of the plurality of first devices through the network switch, and each of the plurality of first devices is updated according to the received communication device firmware file.

Abstract: The present disclosure provides for various embodiments of optical imaging lenses. An optical imaging lens may comprise at least five lens elements positioned in an order from an object side to an image side. By controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least an inequality, the optical imaging lens may exhibit better optical characteristics, the total length of the optical imaging lens may be shortened, and the view angle and f-number may also be improved.

Abstract: The optical imaging lens includes five lens elements from an object side to an image side. The optical imaging lens shows better optical characteristics through controlling the convex or concave shape of the surfaces of the lens elements to allow the thicknesses of the second and third lens elements and air gaps between the five lens elements along the optical axis satisfying the relations 1.715?AAG/(AG45)?7.593 and 2.124?ALT/(T2+T3)?3.937, where AAG is the sum of all four air gaps from the first to the fifth lens element along the optical axis, AG45 is an air gap between the fourth and fifth lens elements along the optical axis, ALT is the sum of thicknesses of the first to fifth lens elements along the optical axis, and T2 and T3 are the respective thickness of the second and third lens elements along the optical axis.

Abstract: An imaging lens includes an aperture stop, first to fifth lens elements arranged from an object side to an image side in the given order along an optical axis. The first lens element has a positive refractive power. The image-side surface of the second lens element has a convex portion in a vicinity of the optical axis. The image-side surface of the third lens element has a convex portion in a vicinity of its periphery. The image-side surface of the fourth lens element has a convex portion in a vicinity of the optical axis. The image-side surface of the fifth lens element has a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of its periphery.

Abstract: An optical lens assembly includes an aperture stop, a first lens element to a sixth lens element from an object side toward an image side along an optical axis. The third lens element has an object-side surface with a concave portion in a vicinity of its periphery, and an image-side surface with a convex portion in a vicinity of the optical axis. The fourth lens element has an image-side surface with a convex portion in a vicinity of the optical axis. The fifth lens element positive refractive power has an object-side surface with a convex portion in a vicinity of the optical axis. The sixth lens element has an object-side surface with a convex portion in a vicinity of its periphery. The thickness of lens elements T1, T2, T3, T4, T6 satisfies (T1+T2+T3+T4)/T6?4.0.