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Photographic optical system

An optical system and negative focal power technology, which is applied in the field of photographic optical systems, can solve problems such as structural limitations, limited imaging performance, and inability to further correct primary-order aberrations, and achieve the effects of reducing system field curvature and system chromatic aberration

Active Publication Date: 2016-06-15
RUISHENG OPTOELECTRONICS TECH SUZHOU CO LTD
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Problems solved by technology

The existing photographic lens with seven lens groups is limited by the structure and cannot further correct primary aberrations, such as spherical aberration, resulting in limited imaging performance

Method used

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] see figure 1 , is a schematic structural view of a preferred embodiment of the photographic optical system provided by the present invention. The photographic optical system 1 is mainly composed of seven lenses arranged coaxially, including a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, The specific structure of the sixth lens 160 and the seventh lens 170 is as follows:

[0056] The first lens 110 has negat...

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Abstract

The invention provides a photographic optical system. The photographic optical system sequentially comprises a first lens (focal length being f1), a second lens (focal length being f2), a third lens (focal length being f3), a fourth lens (focal length being f4), a fifth lens (focal length being f5), a sixth lens (focal length being f6) and a seventh lens (focal length being f7) which are coaxially arranged from an object side to an image side, wherein the first lens has negative focal power and an object side surface being a convex surface; and the seventh lens has negative focal power, and satisfies the following conditions: -1.5<f1 / f<-0.5, 1.0<f2 / f<2.5, 0.5<f3 / f<1.5 , -2.5<f4 / f<-0.5, -10<f5 / f<-2, 0.2<f6 / f<1.2, -2.5<f7 / f<-0.4, wherein f is the focal length of the entire system. The photographic optical system with large relative aperture provided by the invention is designed through reasonable surface form optimization, focal power allocation and optical material selection, can provide imaging performance in a low illumination environment, and is clear in imaging.

Description

【Technical field】 [0001] The invention relates to a photographic optical system, in particular to a photographic optical system for portable electronic equipment. 【Background technique】 [0002] In recent years, with the vigorous development of miniaturized photographic lenses, the demand for miniature imaging modules is increasing day by day, and the photosensitive elements of general photographic lenses are nothing more than two types of photosensitive coupling elements or complementary metal oxide conductor elements, and with the development of semiconductor The improvement of manufacturing technology has reduced the pixel size of the photosensitive element, coupled with the development trend of today's electronic products with good functions and thin, light and small appearance. Therefore, miniaturized photographic lenses with good imaging quality have become the current market. mainstream. [0003] In photographic lenses using photosensitive elements, the resolution of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045
Inventor 石荣宝
Owner RUISHENG OPTOELECTRONICS TECH SUZHOU CO LTD
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