Ultra-wide field angle and large aperture fish-eye lens optical system

Abstract

The invention relates to an ultra-wide field angle and large aperture fish-eye lens optical system, and the system sequentially comprises a front optical system with the negative focal power and a rear optical system with the positive focal power from the object side to the image side along an optical axis. The front optical system sequentially includes a first lens of negative power, a second lens of negative power and a third lens of negative power from the object side to the image side in the direction of the optical axis. The rear optical system sequentially includes a fourth lens of negative power, a fifth lens of positive power, a sixth lens of negative power, a seventh lens of the positive power, an eighth lens of the negative power, an aperture diaphragm, a ninth lens of the positive power, a tenth lens of the negative power, an eleventh of the negative power, a twelfth lens of the positive power and a filter from the object side to the image side in the direction of the optical axis. The system provided by the invention is good in image plane uniformity, is high in imaging quality, is large in view field angle, is large in receiving aperture, is compact in structure, and is easy to process and install.

Description

technical field [0001] The invention relates to the field of optical imaging systems, in particular to an ultra-wide-angle, large-aperture fisheye lens optical system. Background technique [0002] With the development of science and technology, more and more fields require not only high-resolution images, but also a large field of view. Ultra-wide-angle optical imaging system, such as fisheye lens optical system is a special optical system, its imaging field of view is very large, it can achieve full spatial inclusion and full time domain real-time information acquisition, and realizes the realized function. Because the fisheye lens can obtain a field of view that cannot be achieved by general optical systems, it has a wide range of applications in many fields, from special photography to engineering surveying, security monitoring, national defense and military and dome movies. [0003] For the fisheye lens optical system, it can be divided into two parts: the front group...

AI Technical Summary

Problems solved by technology

In the fisheye lens optical system, the light emitted by the object point with a large field of view hits the surface of the optical element with a very large field of view, which makes the aberration of this type of optical system often serious; in addition, currently in various fields In applications, in order to obtain clearer images, small and medium apertures cannot meet the requirements, so large aperture imaging is pursued, which makes the design of this type of optical system more complicated

However, Seidel's aberration theory can only analyze the aberration in the case of an axisymmetric optical system (with a small field of view), and cannot do anything about the aberration analysis and optimal design of this ultra-wide-angle optical system.

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