48results about How to "Small aperture value" patented technology

An optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens from an object side to an image side along an optical axis. Each of the first to eighth lenses comprises an object side surface facing the object side and allowing imaging light to pass therethrough and an image side surface facing the image side and allowing imaging light to pass therethrough. The first lens has a positive refractive index. The second lens has a negative refractive index. The optical axis area of the object sidesurface of the fifth lens is a concave surface. The optical axis area of the object side surface of the sixth lens is a convex surface. The optical axis area of the image side surface of the seventhlens is a convex surface. The lens with refractive index of the optical imaging lens is only the first lens to the eighth lens. The lens of the optical imaging lens has a small aperture value, a shortsystem length and a large field angle, and can still maintain good imaging quality.

An imaging lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens element has refractive power and includes a convex surface facing theobject side. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens has refractive power. The sixth lens element with positive refractive power includes a convex surface facing the object side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the object side to the image side along the optical axis. The imaging lens satisfies the following conditions: 0.2<|f5 / f|<1.5, wherein f5 is the effective focallength of the fifth lens, and f is the effective focal length of the imaging lens.

The invention relates to an optical imaging lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens from an object side to an image side along an optical axis, wherein each of the first to ninth lenses comprises an object side surface facing the object side and allowing imaging light to pass through and an image side surface facing the image side and allowing imaging light to pass through, the first lens has a positive refractive index, the circumferential area of the image side surface of the first lens is a concave surface, the optical axis area of the object side surface of the second lens is a convex surface, the optical axis area of the image side surface of the ninth lens is a concave surface, only nine lenses of the optical imaging lens are provided, and the following conditional expressions are satisfied: V1 + V2 is less than or equal to 80.000 and V3 + V7 is more than or equal to 50.000.

The invention discloses an imaging lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens has negative refractive power and includes a convex surface facing the object side; the second lens has negative refractive power; the third lens has positive refractive power; the fourth lens has positive refractive power; the fifth lens has positive refractive power; the sixth lens has negative refractive power; the seventh lens has positive refractive power and includes a convex surface facing the object side; and the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are sequentially arranged from the object side to the image side along the optical axis. The imaging lens satisfies the following conditions: the absolute value of f6 / f is greater than 0.3 and less than 1.2, wherein f6 is the effective focal length of the sixth lens, and f isthe effective focal length of the imaging lens.

The invention relates to a projection lens, which sequentially includes a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group and a sixth lens along the optical axis from the projection side to the image source side group. The first lens group has negative refractive power, including the first lens, the second lens group has positive refractive power, the third lens group has positive refractive power, the fourth lens group has negative refractive power, the fifth lens group has positive refractive power, and the sixth lens group has Positive refractive power, where the projection lens meets the following conditions: 0.4<R 12 / f<2.5; R 12 is the curvature radius of the image source side of the first lens, and f is the effective focal length of the projection lens.

The application relates to the technical field of mobile terminals, and discloses a periscope lens module for a mobile terminal and the mobile terminal. The module includes: a motor housing and a lens; the lens includes: a casing, a first lens, and a second lens, wherein the casing includes a first cylinder and a second cylinder connected to the first cylinder, and the second cylinder communicates with the first cylinder. The side wall of a cylinder is provided with at least one notch penetrating the side wall; the first lens is fixed in the first cylinder, and the second lens is fixed in the second cylinder. In the above embodiment, at least one through notch is provided on the side wall of the first cylindrical body, and when the notch is formed, a part of the arc-shaped side wall on the first cylindrical body is cut away. When the lens module is placed in the mobile terminal, the thickness of the mobile terminal affects the diameter of the first lens. Therefore, when placing the lens module, the notch is directed towards the rear shell of the mobile terminal, so that the diameter of the first lens can be increased and the diameter of the first lens can be reduced. The aperture value of the small lens module improves the quality of imaging.

An imaging lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The first lens is a meniscus lens with negative refractive power, and comprises a convex surface facing the object side and a concave surface facing the image side. The second lens has negative refractive power. The third lens element has refractive power. The fourth lens has positive refractive power. The fifth lens has positive refractive power and comprises a convex surface facing the image side. The sixth lens has refractive power. The seventh lens has positive refractive power. The eighth lens has negative refractive power and comprises a concave surface facing the object side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are sequentially arranged from the object side to the image side along the optical axis.

The invention discloses an optical imaging lens. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side on an optical axis. The optical axis area of the object side surface of the first lens is a convex surface, the optical axis area of the image side surface of the third lens is a concave surface, and the optical imaging lens only comprises four lenses. Tavg is defined as the average value of the thicknesses of the four lenses on the optical axis from the first lens to the fourth lens, [nu]1 is defined as the Abbe number of the first lens, [nu]2 is defined as the Abbe number of the second lens, and Tavg < = 300 [mu]m, and |[nu]1 - [nu]2| <= 30.000 are satisfied. The optical imaging lens has the advantages of being small in aperture value (Fno), small in size, large in field angle, excellent in imaging quality and good in optical performance.

An imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens. The first lens has negative refractive power and includes a concave surface facing the image side. The second lens has negative refractive power. The third lens has positive refractive power. The fourth lens has positive refractive power. The fifth lens has positive refractive power. The sixth lens has negative refractive power. The seventh lens has refractive power. The eighth lens has refractive power. The ninth lens is a meniscus lens and includes a convex surface facing the object side and a concave surface facing the image side. The first, second, third, fourth, fifth, sixth, seventh, eighth and ninth lenses are sequentially arranged along the optical axis from the object side to the image side.

A lens assembly (1, 2) includes sequentially from an object side to an image side along an optical axis (OA1, OA2) a first lens (L11, L21), a second lens (L12, L22), a third lens (L13, L23), a fourth lens (L14, L24), a stop (ST1, ST2), a fifth lens (L15, L25), a sixth lens (L16, L26), a seventh lens (L17, L27) and an eighth lens (L18, L28). The first lens (L11, L21) is a meniscus lens with refractive power. The second lens (L12, L22) is a meniscus lens with refractive power. The third lens (L13, L23) is a biconcave lens with negative refractive power. The fourth lens (L14, L24) is a biconvex lens with positive refractive power. The fifth lens (L15, L25) is a biconvex lens with positive refractive power. The sixth lens (L16, L26) is with positive refractive power. The seventh lens (L17, L27) is with negative refractive power. The eighth lens (L18, L28) is with positive refractive power. The sixth lens (L16, L26) and the seventh lens (L17, L27) are cemented together.

The present application relates to the technical field of mobile terminals, and discloses a periscope lens module of a mobile terminal and a mobile terminal. The module includes: a motor casing and a lens; the lens includes: a casing, a first lens and a second lens, wherein the casing includes a first cylindrical body and a second cylindrical body communicated with the first cylindrical body, the first The side wall of a cylinder is provided with at least one notch penetrating the side wall; the first lens is fixed in the first cylinder, and the second lens is fixed in the second cylinder. In the above embodiment, at least one penetrating notch is provided on the side wall of the first cylindrical body, and when the notch is formed, a part of the arc-shaped side wall of the first cylindrical body is cut off. When the lens module is placed in the mobile terminal, the thickness of the mobile terminal affects the diameter of the first lens. Therefore, when placing the lens module, the notch should be oriented towards the rear shell of the mobile terminal, so that the diameter of the first lens can be increased and the diameter of the first lens can be reduced. The aperture value of the small lens module improves the image quality.