摘要:
An imaging lens includes plastic-made first, second, third, and fourth lens elements arranged in the given order from an object side to an imaging side. The first lens element has a positive focusing power and is biconvex. The second lens element has a negative focusing power, is biconcave, and has an abbe number not greater than 30. The third lens element has a positive focusing power and has a convex imaging-side surface facing toward the imaging side. The fourth lens element has an imaging-side surface formed with a concave area in a vicinity of an optical axis of the fourth lens element. The imaging lens further includes an aperture stop disposed between the first and second lens elements.
摘要:
An imaging lens includes first, second, third, fourth, and fifth lens elements arranged from an object side to an image side in the given order. The first, second, and third lens elements have positive, negative, and negative refractive powers, respectively. The third lens element has an image-side surface having a convex portion in a vicinity of a periphery of the third lens element. The fourth lens element has a concave object-side surface. The fifth lens element has an object-side surface that has a convex portion in a vicinity of an optical axis of the imaging lens, and an image-side surface that has a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of the fifth lens element.
摘要:
An imaging lens includes first, second, third, and fourth lens elements arranged from an object side to an image side in the given order. The first lens element has a positive refractive power, and a convex object-side surface. The second lens element has a negative refractive power, and an image-side surface with a convex portion. The third lens element has an object-side surface with a concave portion. The fourth lens element has an object-side surface with a convex portion, and an image-side surface with a convex portion and a concave portion.
摘要:
An imaging lens includes first, second, and third lens elements arranged from an object side to an image side in the given order. The first lens element has a positive refracting power, and has a convex object-side surface facing toward the object side. The second lens element has a concave object-side surface facing toward the object side, and a convex image-side surface facing toward the image side. The third lens element has an image-side surface facing toward the image side and having a concave portion in a vicinity of an optical axis of the imaging lens. The imaging lens satisfies |ν1−ν2| 20, where ν1, ν2, and ν3 represent dispersion coefficients of the first, second, and third lens elements, respectively.
摘要:
An imaging lens includes: a first lens element having a positive refracting power, and having a convex object-side surface facing toward an object side; a second lens element having a negative refracting power, and having a concave image-side surface facing toward an image side; a third lens element having a negative refracting power; a fourth lens having a convex image-side surface facing toward the image side; and a fifth lens element having an image-side surface with concave and convex portions and facing toward the image side. Absolute value of a difference between Abbe numbers of the second and third lens elements is less than 10. A quotient of a thickness of the fourth lens element divided by a sum of widths of air gap among the lens elements ranges between 0.5 and 1.
摘要:
A light guide lens includes: an outer surrounding surface that extends between a front surface disposed at an optical axis, and a rear end formed with a recess that has an end surface disposed at the optical axis, and an inner surrounding surface extending rearward from a periphery of the end surface. The outer surrounding surface diverges forwardly along the optical axis, and includes first and second pairs of curved surface parts, the first pair being disposed mutually asymmetrical on opposite sides of an imaginary plane, the second pair being disposed mutually symmetrical on opposite sides of another imaginary plane and extending between the first pair. The end surface includes a third pair of curved surface parts disposed mutually asymmetrical on opposite sides of yet another imaginary plane.
摘要:
An imaging lens includes plastic-made first, second, third, fourth, and fifth lens elements arranged in the given order from an object side to an imaging side, each having object-side and imaging-side surfaces facing toward the object and imaging sides, respectively. The first lens element has a positive focusing power, and the object-side surface thereof is a convex surface. The second lens element has a negative focusing power, and the imaging-side surface thereof is a concave surface. The third lens element has a positive focusing power, and each of the imaging-side and object-side surfaces thereof is a convex surface. The fourth lens element is a meniscus lens, and the imaging-side surface thereof is a convex surface. The imaging-side surface of the fifth lens element has a concave area in a vicinity of an optical axis of the fifth lens element.
摘要:
An imaging lens includes plastic-made first, second, third, and fourth lens elements arranged in the given order from an object side to an imaging side. The first lens element has a positive focusing power and is biconvex. The second lens element has a negative focusing power, is biconcave, and has an abbe number not greater than 30. The third lens element has a positive focusing power and has a convex imaging-side surface facing toward the imaging side. The fourth lens element has an imaging-side surface formed with a concave area in a vicinity of an optical axis of the fourth lens element. The imaging lens further includes an aperture stop disposed between the first and second lens elements.
摘要:
An imaging lens includes: a first lens element having a positive refracting power, and having a convex object-side surface facing toward an object side; a second lens element having a negative refracting power, and having a concave image-side surface facing toward an image side; a third lens element having a negative refracting power; a fourth lens having a convex image-side surface facing toward the image side; and a fifth lens element having an image-side surface with concave and convex portions and facing toward the image side. Absolute value of a difference between Abbe numbers of the second and third lens elements is less than 10. A quotient of a thickness of the fourth lens element divided by a sum of widths of air gap among the lens elements ranges between 0.5 and 1.
摘要:
Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises five lens elements 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 to allow the thickness of the second lens element and the sum of all air gaps between all five lens elements along the optical axis satisfying the relation: 0.20