Abstract: An imaging lens is provided in which a total angle of view is 150 degrees or more, and which exhibits a high-image quality, is compact, is inexpensive, and keeps a stable quality under a harsh environment in an on-board camera or the like.

Abstract: An imaging lens includes a first lens having a negative refracting power and having a meniscus shape; a second lens having a negative refracting power and having a meniscus shape; a third lens having a positive refracting power and having a meniscus shape; an aperture stop; a fourth lens having a positive refracting power and having a bi-convex shape; a fifth lens having a negative refracting power and having a bi-concave shape; and a sixth lens having a positive refracting power and having a bi-convex shape The imaging lens has a total angle of view of 150 degrees or more, and fulfills predetermined conditional expressions.

Abstract: An imaging lens is provided in which a total angle of view is 150 degrees or more, and which exhibits a high-image quality, is compact, is inexpensive, and keeps a stable quality under a harsh environment in an on-board camera or the like.

Abstract: An imaging lens is provided in which a total angle of view is 150 degrees or more, and which exhibits a high-image quality, is compact, is inexpensive, and keeps a stable quality under a harsh environment in an on-board camera or the like.

Abstract: An image pickup lens includes, in order from an object side, a first lens element having a positive refractive power and a convex surface facing the object side, an aperture stop adjusting the amount of light, a second lens element having a negative refractive power, a third lens element having a positive refractive power and a concave surface facing the object side, and a fourth lens element having a negative refractive power. In the image pickup lens, the following conditional expressions are satisfied, 0.6<|f2/f|<1.8 0?f2/R4<1.7 where f denotes a focal length of an entire lens system, f2 denotes a focal length of the second lens element, and R4 denotes a curvature radius of an object-side surface of the second lens element.

Abstract: An image pickup lens includes: a first lens having a positive refracting power; an aperture stop for adjusting the amount of light; a second lens having a concave face directed to the object side and having a negative refracting power; a third lens having a concave face directed to the object side and having a positive refracting power; and a fourth lens having a negative refracting power; the first lens, aperture stop, second lens, third lens, and fourth lens being disposed in order from the object side.

Abstract: An image pickup lens includes: a first lens having a positive refracting power; an aperture stop for adjusting the amount of light; a second lens having a concave face directed to the object side and having a negative refracting power; a third lens having a concave face directed to the object side and having a positive refracting power; and a fourth lens having a negative refracting power; the first lens, aperture stop, second lens, third lens, and fourth lens being disposed in order from the object side.

Abstract: An image pickup lens includes, in order from an object side, a first lens element having a positive refractive power and a convex surface facing the object side, an aperture stop adjusting the amount of light, a second lens element having a negative refractive power, a third lens element having a positive refractive power and a concave surface facing the object side, and a fourth lens element having a negative refractive power. In the image pickup lens, the following conditional expressions are satisfied, 0.6<|f2/f|<1.8 0?f2/R4<1.7 where f denotes a focal length of an entire lens system, f2 denotes a focal length of the second lens element, and R4 denotes a curvature radius of an object-side surface of the second lens element.

Abstract: An imaging lens includes, in order from an object side, a first lens with a positive refractive power having a biconvex shape; an aperture stop having a predetermined aperture diameter; a second lens with a positive refractive power having a concave surface on the object side, at least one of the object-side surface and an image-plane-side surface of the second lens being aspherical; and a third lens with a negative refractive power having a concave surface on the object side and an aspherical surface with an inflection point in an effective-diameter area on the image-plane side, whereby aberrations can be effectively corrected, the total length of the lens system can be reduced to reduce the overall size, in particular the thickness, and a shutter can be readily accommodated.

Abstract: An imaging lens includes, in order from an object side, a first lens with a positive refractive power having a biconvex shape; an aperture stop having a predetermined aperture diameter; a second lens with a positive refractive power having a concave surface on the object side, at least one of the object-side surface and an image-plane-side surface of the second lens being aspherical; and a third lens with a negative refractive power having a concave surface on the object side and an aspherical surface with an inflection point in an effective-diameter area on the image-plane side, whereby aberrations can be effectively corrected, the total length of the lens system can be reduced to reduce the overall size, in particular the thickness, and a shutter can be readily accommodated.