High-definition monitoring optical system and applied image photographing module group thereof

Abstract

The embodiment of the invention discloses a high-definition monitoring optical system which is provided with a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged from an object plane to an image plane in turn along an optical axis. The fourth lens and the fifth lens are mutually glued to form a combined lens and meet the condition that the result of 1/f2 and 1/f45 is approximately equal to 0, wherein f2 is the focal length of the second lens, and f45 is the focal length after combination of the fourth lens and the fifth lens. Besides, the embodiment of the invention also provides an image photographing module group. The high-definition monitoring optical system is mainly composed of five lenses so that the number of the lenses is less and the structure is simple; and different lenses are mutually combined and focal power is enabled to be reasonably allocated, and the fourth lens and the fifth lens form the glued lens so that the high-definition monitoring optical system is enabled to have the optical performance of high pixel, large aperture, low total length, great resolution and excellent temperature performance and the system is suitable for the field of vehicle-mounted reversing rear view monitoring.

Description

[0001] Technical field: [0002] The invention relates to an optical system and a camera module applied thereto, in particular to a vehicle-mounted rear view monitoring optical system and a vehicle-mounted camera module applied thereto. [0003] Background technique: [0004] At present, the vehicle-mounted rearview monitoring optical system and the camera modules used in it generally have the defects of too many lenses and complex structures, and the clarity is poor, and the temperature effect is not good. [0005] Invention content: [0006] In order to overcome the problems of too many lenses and complicated structures in existing optical systems or camera modules, the embodiments of the present invention provide a high-definition monitoring optical system on the one hand. [0007] The high-definition monitoring optical system is provided in sequence along the optical axis from the object plane to the image plane: the first lens, the second lens, the third lens, the fourth ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of too many lenses and complicated structures in existing optical system

Images