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.

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, 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 imaging lens may be shortened while providing better optical characteristics and imaging quality.

Abstract: Present embodiments relate to an optical imaging lens. The optical imaging lens may include 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 imaging lens may be shortened while providing improved optical characteristics and imaging quality.

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 ocular optical system has four lens elements, wherein the ocular optical system includes a first lens element having a display-side surface with a convex portion in a vicinity of its periphery, and a third lens element having an eye-side surface with a convex portion in a vicinity of its periphery. In addition, ?1 is an Abbe number of the first lens element, ?4 is an Abbe number of the fourth lens element, and the ocular optical system satisfies the relationship 20.00?|?1??4|.

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 ocular optical system has four lens elements, wherein the ocular optical system includes a first lens element having a display-side surface with a convex portion in a vicinity of its periphery, and a third lens element having an eye-side surface with a convex portion in a vicinity of its periphery. In addition, ?1 is an Abbe number of the first lens element, ?4 is an Abbe number of the fourth lens element, and the ocular optical system satisfies the relationship 20.00?|?1-?4|.

Abstract: Present embodiments provide for an optical imaging lens. The optical imaging lens includes at least a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element positioned in an order from an object side to an image side. Through forming a vignetting aperture and designing parameters satisfying at least two inequalities, the improved optical imaging lens may provide better optical characteristics, a decreased effective focal length and an enlarged angle of view while the total length of the optical imaging lens may be shortened.

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.

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.