Abstract: A photographing optical lens assembly, sequentially arranged from an object side to an image side, comprising: the first lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the second lens element with positive refractive power having bi-convex surfaces, the third lens element with positive refractive power having a convex object-side surface, at least one aspherical surface and at least one inflection point on at least one optical surface. Additionally, the photographing optical lens assembly comprises a stop and satisfies condition such as 0.75<SL/TTL<1.1, wherein SL is the axial distance from the stop to the image plane, TTL is the axial distance from the object-side surface of first lens element to the image plane. By such arrangements, the photographing optical assembly can effectively correct the aberration and obtain superior image quality.

Abstract: An optical lens assembly for image taking, sequentially arranged from an object side to an image side, comprises: the first lens element with refractive power, the second lens element with positive refractive power, the third lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the fourth lens element with positive refractive power having a convex object-side surface. The optical lens assembly further comprises a stop and an image sensor on an image plane. Each of the third and the fourth lens elements can have at least one aspherical surface. When the optical lens assembly utilizes the thickness conditions provided in the present invention, along with a favorable entrance pupil diameter ratio, fine aberration corrections, wide-angle of view, and functionalities for common image pickup cameras or those used with infrared settings can be achieved.

Abstract: This invention provides a compact imaging lens assembly in order from an object side toward an image side including a first lens with positive refractive power having at least one of the object-side and image-side surfaces thereof being aspheric, a second lens with negative refractive power having a concave object-side surface and a concave image-side surface with at least one of both surfaces thereof being aspheric, and an aperture stop positioned between the first lens element and the second lens element. There are two lens elements with refractive power in the compact imaging lens assembly.

Abstract: This invention provides a photographing optical lens assembly from an object side toward an image side in order including a first lens element with negative refractive power having a concave image-side surface, a second lens element with positive refractive power having the object-side surface and the image-side surface being convex, a third lens element with negative refractive power having a concave image-side surface and both surfaces thereof being aspheric. An aperture stop is positioned between the first and the second lens elements. An electronic photo sensor is positioned at the image plane. There are three lens elements with refractive power in the photographing optical lens assembly.

Abstract: This invention provides a compact imaging lens assembly in order from an object side toward an image side including a first lens with positive refractive power having at least one of the object-side and image-side surfaces thereof being aspheric, a second lens with negative refractive power having a concave object-side surface and a concave image-side surface with at least one of both surfaces thereof being aspheric, and an aperture stop positioned between the first lens element and the second lens element. There are two lens elements with refractive power in the compact imaging lens assembly.