Patent ID: 11385444

Abstract:
A micro lens assembly for short-range imaging, in order from the object side to the image side: a flat panel, a first lens group, a stop, a second lens group, and an IR cut filter. Wherein a focal length of the first lens group combined is LF, a focal length of the second lens group combined is RF, a distance from an object to be imaged to an object-side surface of a first lens element of the first lens group along an optical axis is OTL, a distance from the object to be imaged to an image plane along the optical axis is TTL, and they satisfy the relations: LF>0; RF>0; 0.65<LF/RF<1.25; OTL<2.0 mm; TTL<10 mm Such a lens assembly can obtain higher short-range imaging effect while maintaining its miniaturization and can reduce the aberration in short-range imaging.