3results about How to "Increase chromatic aberration" patented technology

This invention discloses a video lens and an electronic device. The video lens has an object side and an image side arranged opposite to each other along the optical axis. The video lens includes a lens barrel and a lens group disposed within the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a photosensitive chip arranged sequentially from the object side to the image side. The video lens satisfies the following condition: 0.1≤FA / TTL≤0.25, where FA is the optical focal length of the video lens, and TTL is the distance between the object side surface of the first lens and the imaging surface of the video lens on the optical axis. Through the reasonable arrangement of the five lenses, the optical focal length FA and the total optical length TTL of the optical system of the video lens satisfy the relationship: 0.1≤FA / TTL≤0.25, and the distortion rate reaches below 3%, so as to provide a video lens with small size, low distortion rate, and 4K high pixel resolution.

The application provides an optical imaging lens, which comprises, in sequence from the object side to the image side of the optical imaging lens: a first lens with positive refractive power; a second lens with negative refractive power; a third lens with positive refractive power, the object side surface of the third lens being a convex surface, and the image side surface of the third lens being a concave surface; and a fourth lens with positive refractive power, the object side surface of the fourth lens being a convex surface, and the image side surface of the fourth lens being a concave surface; wherein the following conditions are met: 0 < (R5+R6) / f3 < 6, where R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, and f3 is the effective focal length of the third lens; V4 / V3 > 1, where V4 is the Abbe number of the fourth lens, and V3 is the Abbe number of the third lens; and 3

This invention relates to the field of optics, specifically to a zoom lens and an imaging device. The zoom lens, from the object plane side to the image plane side, consists of a first fixed lens group with positive optical power, a zoom lens group with negative optical power, a second fixed lens group with positive optical power, a focusing lens group with negative optical power, and a third fixed lens group with positive optical power. The second fixed lens group includes two sets of cemented lenses; the third fixed lens group includes at least one lens with positive optical power. The zoom lens satisfies the following conditions: ft / fw > 20; TTL < 100mm; 2 < fG5 / fw < 3. By limiting the focal length of the third fixed lens group and the internal lenses, the third fixed lens group can effectively correct chromatic aberration and aberrations of the preceding lens groups, thus increasing the imaging quality of the zoom lens.