Abstract: An imaging lens substantially consists of five lenses of an aspheric first lens having a convex surface facing an object side and positive refractive power, an aspheric second lens having a concave surface facing the object side and negative refractive power, an aspheric third lens having a meniscus shape in which its object-side surface is convex toward the object side, and positive refractive power, an aspheric fourth lens having negative refractive power and a fifth lens having a convex surface facing the object side and positive refractive power, which are in this order from the object side. Further, the imaging lens satisfies predetermined conditional formulas.

Abstract: An imaging lens substantially consists of five lenses of a first lens having positive-power and a meniscus shape with its convex surface facing an object side, and at least one of the surfaces of which is aspherical, a second lens having negative-power and a concave surface facing an image side, and at least one of the surfaces of which is aspherical, a third lens having negative-power and a convex surface facing the object side, and at least one of the surfaces of which is aspherical, a fourth lens having positive-power and a convex surface facing the object side, and at least one of the surfaces of which is aspherical, and a fifth lens having negative-power and a concave surface facing the image side, and at least one of the surfaces of which is aspherical, which are in this order from the object side. A predetermined formula is satisfied.

Abstract: An imaging lens substantially consisting of six lenses, composed of a first lens having a positive refractive power and a convex surface on the object side, a second lens having a negative refractive power and a concave surface on the image side, a third lens having a positive refractive power and a convex surface on the object side, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power and a concave surface on the image side, and a sixth lens having a negative refractive power with the image side surface having an aspherical shape which is concave on the image side near the optical axis and convex in a peripheral region.

Abstract: An image capturing lens which substantially consists of five lenses, composed of a first aspherical lens having a convex surface on the object side and a positive refractive power; a second aspherical lens having a concave surface on the image side and a negative refractive power; a third aspherical lens having a positive refractive power near the optical axis; a fourth aspherical lens having a negative refractive power; and a fifth aspherical lens which is a meniscus lens having a concave surface on the image side and a negative refractive power, arranged in this order from the object side, and satisfies predetermined conditional expressions.

Abstract: An imaging lens is provided and includes: in order from the object side, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a concave surface on the image side near the optical axis and having a positive refractive power; a fourth lens having a positive refractive power near the optical axis; and a fifth lens having a negative refractive power near the optical axis. An image side surface of the fifth lens is concave near the optical axis and has a region where a negative power of the region decreases toward a periphery of the fifth lens as compared with a negative power near the optical axis.

Abstract: An imaging lens is provided and includes: in order from the object side, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a convex surface on the image side near the optical axis and having a positive refractive power; a fourth lens having a positive refractive power near the optical axis; and a fifth lens having a negative refractive power near the optical axis. An image side surface of the fifth lens is concave near the optical axis and has a region where a negative power of the region decreases toward a periphery of the fifth lens as compared with a negative power near the optical axis.

Abstract: A filter, to be disposed concentrically with an optical axis of an imaging lens, capable of accurately controlling light transmission variation characteristics and effectively providing an apodization effect or a peripheral light intensity correction effect. The filter includes opaque dots disposed according to a honeycomb arrangement from a central portion toward a peripheral portion so as to have, at least partially, a Gaussian distribution like dot density and is structured to satisfy Condition Expression (1) given below when a size of the dots is taken as d. 0.003 mm?d?0.010 mm??(1).

Abstract: An imaging lens is provided and includes: in order from the object side, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a concave surface on the image side near the optical axis and having a positive refractive power; a fourth lens having a positive refractive power near the optical axis; and a fifth lens having a negative refractive power near the optical axis. An image side surface of the fifth lens is concave near the optical axis and has a region where a negative power of the region decreases toward a periphery of the fifth lens as compared with a negative power near the optical axis.

Abstract: An imaging lens includes in order from an object side, a stop and a first lens to a fourth lens. Both the surfaces of a third lens have surfaces including at least one inflection point, and an inclination of each surface at the terminal end part of a periphery within an effective diameter collapses toward the image side. And 0.1<D3/D4 <2.0, ?d1??d2>25, 0.4<f1/f3<1.6 and 0.3<f/f3<1.5 are satisfied, where D3 is an air space on an optical axis between the first lens and the second lens, D4 is a central thickness of the second lens, ?d1 and ?d2 are Abbe numbers of the first lens and the second lens, f1 and f3 are focal lengths of the first lens and the third lens and f is a focal length of an entire system.

Abstract: An imaging device with a short length and small aberration is provided. A total length D of an image-forming optical system is less than 3.6 mm. A maximum incidence angle of a principle ray on an image forming plane exceeds 33°. Conditions f/fL<?1.50 or f/fL<?0.9, and D/f<1.10 are satisfied where f denotes a focal length of the entire image-forming optical system and fL denotes a focal length of a last lens.

Abstract: A filter, to be disposed concentrically with an optical axis of an imaging lens, capable of accurately controlling light transmission variation characteristics and effectively providing an apodization effect or a peripheral light intensity correction effect. The filter includes opaque dots disposed according to a honeycomb arrangement from a central portion toward a peripheral portion so as to have, at least partially, a Gaussian distribution like dot density and is structured to satisfy Condition Expression (1) given below when a size of the dots is taken as d. 0.003 mm?d?0.

Abstract: A zoom lens includes a first lens group having a negative refractive power, a second lens group including a prism which has no refractive power and deflects an optical path, a third lens group that has a positive refractive power and is moved during zooming, a fourth lens group that has a negative refractive power and is moved during zooming, and a fifth lens group having a positive refractive power arranged in this order from an object side. A zoom group including the third positive lens group and the fourth negative lens group, not a fixed positive lens group, is provided on the rear side of the prism. The first lens group includes two negative lenses.

Abstract: Disclosed is an imaging lens having both high heat resistance that enables the imaging lens to be mounted on a printed circuit board by a reflow mounting method and a high optical performance. The imaging lens includes: a first positive lens group; a second negative lens group; a third positive lens group; and a fourth positive or negative lens group. Each of the first to fourth lens groups includes a parallel plane glass plate and a resin lens that has heat resistance and is arranged on the parallel plane glass plate so as to be integrated with the parallel plane glass plate.

Abstract: An imaging lens includes in order from an object side: a first lens including a positive lens having a convex surface directed to the object side; a stop; a second lens including a positive lens having a convex surface directed to an image side; a third lens including a negative meniscus lens with a concave surface directed to the object side; and a fourth lens including, near an optical axis, a positive meniscus shape with a convex surface directed to the object side. An air space between the second lens and the third lens is smaller in a periphery than near the optical axis. And f1>f2>|f3| and 1.0<f/f2<1.5 are satisfied where f1, f2 and f3 are focal lengths of the first lens, the second lens, and the third lens, respectively and f is an focal length of the whole lens system.

Abstract: An imaging lens comprises, in order from an object side: an aperture stop; a first lens having a positive refractive power in a meniscus form having a convex surface facing toward the object; a second lens having a positive or negative refractive power in a meniscus form having a concave surface facing toward the object; and a third lens having a positive or negative refractive power in an aspheric form at both surfaces, wherein conditional expressions given below are satisfied: ?d1>50??(1) ?d3>50??(2) 0.7<f1/f<1.0??(3) ?0.9<f2/{f3·(45??d2)}<0.4??(4) where ?d1: Abbe number of the first lens, ?d2: Abbe number of the second lens, ?d3: Abbe number of the third lens, f: Focal length of an overall system, f1: focal length of the first lens, f2: focal length of the second lens, and f3: focal length of the third lens.

Abstract: An imaging lens is provided and includes: in order from the object side, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a convex surface on the image side near the optical axis and having a positive refractive power; a fourth lens having a positive refractive power near the optical axis; and a fifth lens having a negative refractive power near the optical axis.

Abstract: An imaging lens is provided and includes: in order from the object side, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a concave surface on the image side near the optical axis and having a positive refractive power; a fourth lens having a positive refractive power near the optical axis; and a fifth lens having a negative refractive power near the optical axis. An image side surface of the fifth lens is concave near the optical axis and has a region where a negative power of the region decreases toward a periphery of the fifth lens as compared with a negative power near the optical axis.

Abstract: A zoom lens includes a first lens group having a negative refractive power, a second lens group including a prism which has no refractive power and deflects an optical path, a third lens group that has a positive refractive power and is moved during zooming, a fourth lens group that has a negative refractive power and is moved during zooming, and a fifth lens group having a positive refractive power arranged in this order from an object side. A zoom group including the third positive lens group and the fourth negative lens group, not a fixed positive lens group, is provided on the rear side of the prism. The first lens group includes two negative lenses.

Abstract: Disclosed is an imaging lens having both high heat resistance that enables the imaging lens to be mounted on a printed circuit board by a reflow mounting method and a high optical performance. The imaging lens includes: a first positive lens group; a second negative lens group; a third positive lens group; and a fourth positive or negative lens group. Each of the first to fourth lens groups includes a parallel plane glass plate and a resin lens that has heat resistance and is arranged on the parallel plane glass plate so as to be integrated with the parallel plane glass plate.

Abstract: A compact photographic lens for a digital camera is disclosed. The photographic lens has only two lens elements, yet provides excellent imaging even at the periphery of the image field. The photographic lens of the invention and an image sensor, together, fit within a volume of about 10 cm3. The lens is formed of, in order from the object side, a biconvex lens element having two aspherical surfaces, and a negative meniscus lens element having two aspherical surfaces. The convex surface of the meniscus lens element is positioned on the image side, and various conditions are satisfied in order to provide the photographic lens with a short overall length while favorably correcting various aberrations.