Abstract: A single focus wide-angle lens module includes a fixed aperture diaphragm, a first lens and a second lens arranged from an object side to an image side in a sequence of: the diaphragm, the first lens and the second lens. The first lens has a positive refractive power, a concave surface on the object side and at least one aspheric surface. The second lens has a negative refractive power, a convex surface on the object side and at least one aspheric surface.

Abstract: A single focus wide-angle lens module includes a fixed aperture diaphragm, a first lens, a second lens, a third lens and a fourth lens arranged from an object side to an image side in a sequence of: the first lens, the diaphragm, the second lens, the third lens and the fourth lens. The first lens has a concave surface on the image side and at least one aspheric surface. The second lens has a positive refractive power, a concave surface on the object side and at least one aspheric surface. The third lens has a meniscus shape, a negative refractive power, a concave surface on the object side and at least one aspheric surface. The fourth lens has a positive refractive power, a convex surface on the object side and at least one aspheric surface.

Abstract: A wide-angle imaging lens module includes a fixed aperture diaphragm, a first lens, a second lens, a third lens and a fourth lens arranged from an object side to an image side in a sequence of: the first lens of a negative refractive power with a meniscus shape, having a concave surface on the image side and at least one aspheric surface; the diaphragm; the second lens of a positive refractive power, having a convex surface on the object side and at least one aspheric surface; the third lens of a negative refractive power, having a concave surface on the image side and at least one aspheric surface; the fourth lens of a positive refractive power, having a convex surface on the object side and at least one aspheric surface.

Abstract: An imaging lens module includes a fixed aperture stop and an optical module, and the optical module includes a first, a second, a third and a fourth lenses. The first lens has a meniscus lens with positive refractive power and a concave surface disposed towards the image. The second lens has a meniscus lens with negative refractive power and a concave surface disposed towards the image. The third lens has a meniscus lens with positive refractive power and a convex surface disposed towards the image. The fourth lens has a concave surface disposed towards the object.

Abstract: An imaging lens module includes a fixed diaphragm and an optical module. The optical module includes first, second, third and fourth lenses arranged from an object side to an image side in a sequence of: a diaphragm, the first lens being a double-convex lens, the second lens having a negative refractive power and a concave surface disposed towards the object side, the third lens having a positive refractive power and a meniscus lens with a convex surface disposed towards the image side, the fourth lens having a convex surface disposed towards the object side and a wavy surface disposed towards the image side and a concave surface disposed towards the image side near the optical axis. With the diaphragm of the imaging lens module and the lens arrangement of the optical module, the sensitivity of tolerance of a system can be lowered to achieve a high imaging quality and a good yield rate.