Abstract: An optical lens assembly includes, in order from the object side to the image side: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a stop, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power, wherein a focal length of the first lens is f1, a focal length of the sixth lens is f6, and following condition is satisfied: ?5.74<f1/f6<?1.83, which is favorable to reduce the impact of environmental temperature on the lens assembly and balance the distributing of the refractive power of the optical lens assembly, so as to correct the aberration and reduce the sensitivity.

Abstract: A seven-piece optical lens system, in order from the object side to the image side: a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a refractive power, a fourth lens element with a refractive power; a fifth lens element with a positive refractive power; a sixth lens element with a refractive power; and a seventh lens element with a negative refractive power. Such arrangements can provide a miniaturized seven-piece optical lens system having a big stop and high image quality.

Abstract: A seven-piece optical lens system includes, in order from the object side to the image side: a stop; a first lens element with a positive refractive power; a second lens element with a negative refractive power; a third lens element with a refractive power, a fourth lens element with a positive refractive power; a fifth lens element with a refractive power; a sixth lens element with a positive refractive power; and a seventh lens element with a negative refractive power. Such arrangements can provide a miniaturized seven-piece optical lens system having a big stop and high image quality.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a refractive power having an object-side surface being convex near an optical axis, a second lens element with a positive refractive power, a third lens element with a positive refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, large stop, short length and less distortion.

Abstract: A five-piece optical lens system with a wide field of view includes, in order from the object side to the image side: a first lens element with a negative refractive power, a stop, a second lens element with a positive refractive power, a third lens element with a negative refractive power, a fourth lens element with a positive refractive power, a fifth lens element with a negative refractive power. Such arrangements can provide a five-piece optical lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a first lens element with a positive refractive power having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis, a stop, a second lens element with a refractive power, a third lens element with a positive refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a refractive power having an object-side surface being convex near an optical axis, a second lens element with a positive refractive power, a third lens element with a positive refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, large stop, short length and less distortion.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a first lens element with a positive refractive power having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis, a stop, a second lens element with a refractive power, a third lens element with a positive refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power, a second lens element with a positive refractive power, a third lens element with a negative refractive power, a fourth lens element with a positive refractive power. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power, a second lens element with a positive refractive power, a third lens element with a negative refractive power, a fourth lens element with a positive refractive power. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A six-piece optical lens system with a wide field of view includes, in order from the object side to the image side: a first lens element with a negative refractive power, a second lens element with a positive refractive power, a stop, a third lens element with a positive refractive power, a fourth lens element with a negative refractive power, a fifth lens element with a positive refractive power. Such arrangements can provide a six-piece optical lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A six-piece optical lens system with a wide field of view includes, in order from the object side to the image side: a first lens element with a negative refractive power, a second lens element with a positive refractive power, a stop, a third lens element with a positive refractive power, a fourth lens element with a negative refractive power, a fifth lens element with a positive refractive power. Such arrangements can provide a six-piece optical lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A five-piece optical lens system with a wide field of view includes, in order from the object side to the image side: a first lens element with a negative refractive power, a stop, a second lens element with a positive refractive power, a third lens element with a negative refractive power, a fourth lens element with a positive refractive power, a fifth lens element with a negative refractive power. Such arrangements can provide a five-piece optical lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: A five-piece optical imaging lens, in order from an object side to an image side, includes: an aperture stop; a first lens element with a positive refractive power having an object-side surface being convex near an optical axis and the image-side surface being concave near the optical axis; a second lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis; a third lens element with a negative refractive power having an image-side surface being concave near the optical axis; a fourth lens element with a positive refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis; a fifth lens element with a negative refractive power having an image-side surface being concave near the optical axis.

Abstract: An optical lens system with a wide field of view includes, in order from the object side to the image side: a stop; a first lens element with a positive refractive power having a convex image-side surface and at least one aspheric surface; a second lens element with a negative refractive power having a concave image-side surface and at least one aspheric surface; a third lens element with a positive refractive power having a concave object-side surface and at least one aspheric surface; and a fourth lens element with a negative refractive power having a convex object-side surface and at least one aspheric surface, at least one of the object-side and the image-side surfaces of the fourth lens element is formed with an inflection point.

Abstract: A five-piece optical imaging lens, in order from an object side to an image side, includes: an aperture stop; a first lens element with a positive refractive power having an object-side surface being convex near an optical axis and the image-side surface being concave near the optical axis; a second lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis; a third lens element with a negative refractive power having an image-side surface being concave near the optical axis; a fourth lens element with a positive refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis; a fifth lens element with a negative refractive power having an image-side surface being concave near the optical axis.

Abstract: A six-piece optical lens system with a wide field of view includes, in order from the object side to the image side: a first lens element with a negative refractive power, a second lens element with a positive refractive power, a stop, a third lens element with a positive refractive power, a fourth lens element with a negative refractive power, a fifth lens element with a positive refractive power, a sixth lens element with a negative refractive power. Abbe numbers of the third, fourth, fifth, sixth lens elements are V3, V4, V5, V6, a focal length of the six-piece optical lens system with a wide field of view is f, a distance from an object-side surface of the first lens element to an image plane along an optical axis is TL, satisfying the relations: 29<V3?V4<42; 29<V5?V6<42; 0.1<f/TL<0.4.

Abstract: An optical lens system with a wide field of view includes, in order from the object side to the image side: a stop, a first lens element with a negative refractive power, a second lens element with a positive refractive power, a third lens element with a negative refractive power, a fourth lens element with a positive refractive power, and a fifth lens element with a negative refractive power. Such arrangements can provide a five-piece optical lens system which has a wide field of view, high resolution, short length and less distortion.

Abstract: An optical imaging lens includes, in order from an object side to an image side: a stop, a first lens element with a positive refractive power, a second lens element with a negative refractive power, a third lens element with a refractive power, a fourth lens element with a positive refractive power, and a fifth lens element with a negative refractive power. A focal length of the second lens element, the third lens element and the fourth lens element combined is f234, a focal length of the fifth lens element is f5, and they satisfy the relation: ?1.8<f234/f5<?1.0, so that the optical imaging lens would have an appropriate refractive power, and spherical aberration and astigmatism can also be reduced.

Abstract: An optical imaging lens includes, in order from an object side to an image side: a stop, a first lens element with a positive refractive power, a second lens element with a negative refractive power, a third lens element with a refractive power, a fourth lens element with a positive refractive power, and a fifth lens element with a negative refractive power. A focal length of the second lens element, the third lens element and the fourth lens element combined is f234, a focal length of the fifth lens element is f5, and they satisfy the relation: ?1.8<f234/f5<?1.0, so that the optical imaging lens would have an appropriate refractive power, and spherical aberration and astigmatism can also be reduced.