Abstract: 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, and a seventh lens element arranged in sequence from an object side to an image side along an optical axis is provided. Each lens element includes an object-side surface and an image-side surface. A periphery region of an image-side surface of the second lens element is concave. A periphery region of an object-side surface of the third lens element is concave. A periphery region of an object-side surface of the sixth lens element is concave. An optical axis region of an image-side surface of the sixth lens element is a convex.

Abstract: An optical imaging lens including a first lens element to an eighth lens element arranged in sequence from an object side to an image side along an optical axis is provided. The first lens element has positive refracting power. At least one of the object-side surface and the image-side of the second lens element is an aspheric surface. At least one of the object-side surface and the image-side of the third lens element is an aspheric surface. At least one of the object-side surface and the image-side of the fourth lens element is an aspheric surface. The object-side surface and the image-side of the fifth lens element are both aspheric surfaces. The object-side surface and the image-side of the sixth lens element are both aspheric surfaces. An optical axis region of the image-side surface of the seventh lens element is concave. An optical axis region of the object-side surface of the eighth lens element is concave.

Abstract: An optical imaging lens includes 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, and an eighth lens element from an object side to an image side in order along an optical axis. The first lens element to the eighth lens element each include an object-side surface facing the object side and an image-side surface facing the image side. The second lens element has negative refracting power. The optical axis region of the image-side surface of the third lens element is concave. The optical axis region of the object-side surface of the fourth lens element is concave. The periphery region of the image-side surface of the fourth lens element is convex. The periphery region of the object-side surface of the sixth lens element is concave.

Abstract: An optical imaging lens including first, second, third, fourth, fifth, sixth, and seventh lens elements arranged in sequence from an object side to an image side is provided. Each lens element includes an object-side surface and an image-side surface. The first lens element has positive refracting power, and a periphery region of the image-side surface of the first lens element is concave. An optical axis region of the image-side surface of the second lens element is concave. A periphery region of the object-side surface of the third lens element is concave. An optical axis region of the image-side surface of the sixth lens element is concave.

Abstract: An imaging lens includes first, second, third, fourth, fifth, sixth and seventh lens elements arranged in a sequence from an object side to an image side along an optical axis. Each lens element has an object-side surface and an image-side surface. The object-side of the third lens element has a convex portion in a vicinity of a periphery. The object-side of the fifth lens element has a convex portion in a vicinity of the optical axis and a concave portion in a vicinity of a periphery. The object-side of the sixth lens element has a concave portion in a vicinity of a periphery. All of lens elements having refracting power of the imaging lens are the first, second, third, fourth, fifth, sixth and seventh lens elements.

Abstract: An optical lens assembly includes a first lens of a concave image surface near its periphery, a second lens of a plastic material, a third lens of a concave object surface near the optical-axis and a concave image surface near its periphery, a fourth lens of a concave object surface near the optical-axis, a fifth lens of a concave object surface near its periphery and a convex image surface near the optical-axis.

Abstract: An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The display-side has a plurality of effective sub-surfaces and a plurality of ineffective sub-surfaces. The effective sub-surfaces are configured to allow the image rays to form an image. Each ineffective sub-surface connects two adjacent effective sub-surfaces. The ocular optical system satisfies: 25.000°???52.000°, where ? represents a maximum tilting angle of the effective sub-surfaces relative to a reference plane perpendicular to the optical axis.

Abstract: Present embodiments provide for an optical imaging lens. The optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element positioned in an order from an object side to an image side. Through forming convex or concave portions on the surfaces of the lens elements and designing parameters satisfying at least an inequality, the improved optical imaging lens may provide better optical characteristics while the total length of the optical imaging lens may be shortened.

Abstract: An optical imaging lens includes a first lens of an image-side surface with a concave portion in a vicinity of its optical-axis, a second lens of an object-side surface with a convex portion in a vicinity of its optical-axis, a third lens of an image-side surface with a concave portion in a vicinity of its optical-axis, a fifth lens of negative refractive power and with a thickness along its optical-axis larger than that of the second lens. EFL is the effective focal length of the optical imaging lens, TTL is the distance from the object-side surface of the first lens element to an image plane, ALT is a total thickness of all five lenses, the second lens has a second lens thickness T2 and an air gap G34 is between the third lens element and the fourth lens element along the optical axis to satisfy TTL/EFL?1.000, TTL/G34?12.000 and ALT/T2?12.900.

Abstract: A lens holder including a base, a gate mark and a tubular portion is provided. The base includes a plurality of sidewalls, and any two adjacent sidewalls are connected to each other to form an outer edge. A turning corner is formed between every two adjacent sidewalls, and the base includes a chamfer located at a turning corner. The gate mark is disposed at the chamfer. The tubular portion is connected to the base, and the tubular portion extends along the direction away from the base. Besides, a portable electronic device and a manufacturing method of the lens holder are also provided.

Abstract: Present embodiments provide for an optical imaging lens. The optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least two inequalities, the optical imaging lens shows better optical characteristics, increases the effective focal length and narrows the angle of view while the total length of the optical imaging lens is shortened.

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

Abstract: An optical lens including a lens barrel, a fixing ring, and at least one lens element is provided. A bonding surface is provided on an inner side of a periphery of an end of the lens barrel, and a plurality of micro-structures are disposed on the bonding surface in a ring-shaped arrangement. The micro-structures protrude from the bonding surface. The fixing ring is disposed inside the bonding surface of the lens barrel. The lens element is disposed inside the lens barrel. The micro-structures on the bonding surface and the fixing ring are dissolved by a solvent, so as to fix the lens element inside the lens barrel. An assembling method of the optical lens and a lens barrel are also provided.

Abstract: An optical lens assembly includes first, second, third and fourth lens elements arranged in sequence from an object side to an image side along an optical axis. Each lens element has an object-side surface and an image-side surface. The first lens element has positive refracting power, and the image-side surface of the first lens element has a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery. The second lens element has negative refracting power. The object-side surface of the third lens element has a concave portion in a vicinity of the periphery. The image-side surface of the fourth lens element has a convex portion in a vicinity of the periphery.

Abstract: An optical imaging system includes a reflector, a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element from an object side to an image side in order along an optical axis. The first lens element to the fifth lens element each include an object-side surface and an image-side surface. The object-side surface of the second lens element has a convex portion in a 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 fourth lens element has a convex portion in a vicinity of the optical axis, and the object-side surface of the fifth lens element has a concave portion in a vicinity of a periphery of the fifth lens element.

Abstract: An optical lens set includes: a first, second, third, fourth, fifth, sixth and seventh lens element, said first lens element has positive refractive power, said second lens element has positive refractive power, said third lens element has negative refractive power, said sixth lens element has an object-side surface with a concave part in a vicinity of the optical axis, and said seventh lens element has an image-side surface with a concave part in a vicinity of the optical axis. The optical lens set does not include any lens element with refractive power other than said first, second, third, fourth, fifth, sixth and seventh lens elements. In addition, ?6 is the Abbe number of the sixth lens element, and the optical lens set satisfies the relationship: ?6?50.

Abstract: An optical lens assembly includes first, second, third, fourth and fifth lens elements arranged in sequence from an object side to an image side along an optical axis. Only the first lens element to the fifth lens element have refracting power, wherein the optical lens assembly satisfies: 3.1?ALT/AAG, wherein ALT is a sum of thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element on the optical axis, and AAG is a sum of four air gaps from the first lens element to the fifth lens element on the optical axis.

Abstract: Present embodiments provide for an optical lens assembly. The optical lens assembly includes a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element positioned sequentially from an object side to an image side. Through arrangement of convex or concave surfaces of the five lens elements, the length of the optical lens assembly may be shortened while providing better optical characteristics and imaging quality.

Abstract: An optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element arranged in order from an object side to an image side along an optical axis. Each lens element has an object-side surface and an image-side surface. The optical imaging lens satisfies: V4+V5+V6+V7?175.00, wherein V4 is an Abbe number of the fourth lens element, V5 is an Abbe number of the fifth lens element, V6 is an Abbe number of the sixth lens element, and V7 is an Abbe number of the seventh lens element.

Abstract: An optical lens assembly includes a first lens of positive refractive power, a second lens of refractive power, at least one of the object surface and the image surface being aspherical, a fourth lens of refractive power, a fifth lens of a concave object surface near its optical-axis and both the object surface and the image surface being aspherical so that the Abbe number ?4 of the fourth lens, the Abbe number ?5 of the fifth lens, an air gap G12 between the first lens and the second lens, an air gap G23 between the second lens and the third lens, an air gap G45 between the fourth lens and the fifth lens, the second thickness T2 of the second lens, the third thickness T3 of the third lens, the fourth thickness T4 of the fourth lens, and the fifth thickness T5 of the fifth lens satisfy 18??4??5?50 and (G12+T2+G23+T3+T4+G45+T5)/G34?6.3.