Optical imaging system

Abstract

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens arranged in order from an object side, wherein the first lens has positive refractive power, and the second lens has positive refractive power, wherein the eleventh lens has at least one inflection point on at least one of an object-side surface and an image-side surface, and wherein 0.6<TTL/(2×IMG HT)<0.8, and Nv26≥4 are satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging surface on an optical axis, IMG HT is half a diagonal length of the imaging surface, and Nv26 is the number of lenses with an Abbe number of less than 26.

Dependencies are inferred from the claim text.