Telephoto optical imaging system and zoom camera device

Abstract

The present application discloses a telephoto optical imaging system and a zoom camera device. The telephoto optical imaging system includes in sequence from the object side to the image side along the optical axis: a first lens with positive refractive power; The second lens; Reentrant prism, the incident surface of the reentrant prism is perpendicular to the axis of the second lens, the exit surface of the reentrant prism is perpendicular to the incident surface of the reentrant prism, and the imaging light incident to the reentrant prism along the optical axis is on the first surface of the reentrant prism The second turn-back surface of turn-back surface and turn-back prism is reflected successively and shoots vertically from the exit face of turn-back prism; And triangular prism, the light that is vertically shot from the exit face of turn-back prism is reflected and deflected 90 ° at the reflecting surface of triangular prism, and deflection The direction is toward the image side; there is at least one aspheric mirror surface from the object side of the first lens to the image side of the second lens; the total effective focal length F1 of the telephoto optical imaging system satisfies F1>40mm.

Description

technical field [0001] The present application relates to the field of optical elements, and more specifically, to a telephoto optical imaging system and a zoom camera device. Background technique [0002] At present, the requirements for imaging functions of portable electronic devices are getting higher and higher, and the camera devices of mobile phones are developing in the direction of high resolution, large field of view, light weight and multifunctionality. This requires the optical imaging system in the camera device to have multiple characteristics such as large aperture, long focal length, wide field of view, compact structure, high image quality and low distortion. And since the portable electronic device is expected to have a smaller size, the size of the optical imaging system provided thereon is also limited. [0003] Faced with these high requirements, on the one hand, the optical imaging system of the mobile phone camera device is becoming more and more comp...

AI Technical Summary

Problems solved by technology

The increase in the number of lenses in the optical imaging system makes both the optimization in the early stage and the manufacturing in the later stage more complicated and difficult

On the other hand, the mobile phone industry tends to adopt multiple sets of optical imaging systems for multi-camera. The multiple sets of optical imaging systems highlight different optical characteristics, which usually include a telephoto optical imaging system with a longer focal length. Due to the thickness of the mobile phone The limitations of the optical characteristics of the telephoto optical imaging system are limited, which limits the imaging effects of mobile phones such as background blur and object magnification.

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