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Imaging system

An imaging system and imaging technology, applied in the field of imaging systems, can solve the problems of large image surface, super large aperture and miniaturization that are difficult to realize at the same time

Pending Publication Date: 2022-01-25
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an imaging system to solve the problem that the imaging system in the prior art has a large image surface, a super large aperture and a miniaturization that are difficult to realize at the same time

Method used

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Embodiment 1

[0065] Such as Figure 1 to Figure 28 As shown, the imaging system sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens along the optical axis from the object side to the imaging side; The object side of the lens is concave, and the imaging side of the first lens is convex; the object side of the fourth lens is convex, and the imaging side of the fourth lens is concave; wherein, the effective focal length f of the imaging system and the entrance pupil diameter EPD of the imaging system Meet between: f / EPD<1.4.

[0066] Preferably, f / EPD<1.3.

[0067] By constraining the ratio between the effective focal length f of the imaging system and the entrance pupil diameter EPD of the imaging system within a reasonable range, it is ensured that the imaging system reduces the deflection angle of the incident light on the basis of a large image surface and continuously increases the imaging The rel...

Embodiment 2

[0085] Such as Figure 1 to Figure 28 As shown, the imaging system sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens along the optical axis from the object side to the imaging side; The object side of the lens is a concave surface, and the imaging side of the first lens is a convex surface; the object side of the fourth lens is a convex surface, and the imaging side of the fourth lens is a concave surface; wherein, the combined focal length of the first lens, the second lens and the third lens Between f123 and the combined focal length f567 of the fifth lens, the sixth lens and the seventh lens satisfies: 0.3<f123 / f567<1.3.

[0086] The imaging system in this application reduces the deflection angle of the incident light on the basis of ensuring a large image surface, continuously increases the relative aperture of the imaging system, and obtains more light flux, so as to improve the im...

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Abstract

The invention provides an imaging system. The imaging system comprises, from an object side to an imaging side along an optical axis, a first lens whose object side is a concave surface and whose imaging side is a convex surface; a second lens; a third lens; a fourth lens, wherein the object side surface of the fourth lens is a convex surface, and the imaging side surface of the fourth lens is a concave surface; a fifth lens element; a sixth lens; a seventh lens; and an eighth lens, wherein the effective focal length f of the imaging system and the entrance pupil diameter EPD of the imaging system meet the condition that f / EPD is less than 1.4. According to the invention, the problem that the imaging system in the prior art is difficult to realize large image surface, ultra-large aperture and miniaturization at the same time is solved.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular to an imaging system. Background technique [0002] With the development of society and the advancement of science and technology, the development of smart phones is becoming more and more mature, and the functions of smart phones are becoming more and more abundant, such as the camera function. Nowadays, most people tend to use the camera function of mobile phones to replace traditional cameras. The camera function of mobile phones has put forward higher requirements, and mobile phones with high image quality are becoming more and more popular among the public. With the continuous upgrading of the camera effect of each terminal, the imaging system matched with the electronic photosensitive element is also constantly upgraded. Mobile phone manufacturers have put forward new requirements for all aspects of the performance of the imaging system. An imaging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G03B30/00
Inventor 吕赛锋何旦姚嘉诚戴付建赵烈烽
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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