Image pickup optical system

一种光学系统、光学面的技术，应用在光学、光学元件、仪器等方向，能够解决长间距、不利等问题

Active Publication Date: 2012-07-11
LARGAN PRECISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these known technologies, the fourth lens and the fifth lens with inflection points are used to correct aberrations or imaging distortion, but a longer distance must be paid between the third lens and the fourth lens, which is not conducive to shorter lenses. full length for design

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0130] Please refer to the schematic diagram of the optical system of the first embodiment of the present invention Figure 1A , for the aberration curve of the first embodiment, please refer to Figure 1B . The imaging optical system of the first embodiment is mainly composed of five lenses, an infrared filter filter 160, an aperture 100, and an image sensor assembly 180; on the optical axis, from the object side to the image side in sequence Including: the first lens 110 with positive refractive power, the first lens 110 of this embodiment is a lens made of biconvex plastic material, and the object-side optical surface 111 of the first lens and the image-side optical surface 112 of the first lens are both Aspherical surface; the second lens 120 with negative refractive power is concave on the paraxial second lens object side 121, and the second lens image side 122 is a convex surface, which is a lens made of plastic material, and its second lens object side optical surface 1...

no. 2 example

[0138] Please refer to the schematic diagram of the optical system of the second embodiment of the present invention Figure 2A , for the aberration curve of the second embodiment, please refer to Figure 2B . The imaging optical system of the second embodiment is mainly composed of five lenses, an infrared filter 260, an aperture 200, and an image sensor assembly 280; on the optical axis, from the object side to the image side in sequence Including: a first lens 210 with positive refractive power. In this embodiment, the first lens 210 is a lens made of biconvex plastic material, and the first lens object-side optical surface 211 and the first lens image-side optical surface 212 are both Aspherical surface; the second lens 220 with negative refractive power is concave on the paraxial second lens object side 221, and the second lens image side 222 is a convex surface, which is a lens made of plastic material, and its second lens object side optical surface 221 and the second...

no. 3 example

[0145] Please refer to the schematic diagram of the optical system of the third embodiment of the present invention Figure 3A , for the aberration curve of the third embodiment, please refer to Figure 3B . The imaging optical system of the third embodiment is mainly composed of five lenses, an infrared filter filter 360, a diaphragm 300, and an image sensor assembly 380; on the optical axis, from the object side to the image side, it includes: The first lens 310 of positive refractive power, in the present embodiment, the first lens 310 is a lens made of plastic material, the first lens object side optical surface 311 is a convex surface, and the first lens image side optical surface 312 is a concave surface at the paraxial place, The first lens object side optical surface 311 and the first lens image side optical surface 312 are both aspheric surfaces; the second lens 320 with negative refractive power, the second lens object side optical surface 321 is a concave surface, ...

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Abstract

An image pickup optical system, sequentially arranged from an object side to an image side, comprises: the first lens element with positive refractive power having a convex object-side surface; the second lens element with negative refractive power having a concave object-side surface and a convex image-side surface; the third lens element with refractive power; the fourth lens element with refractive power having a concave image-side surface, at least one of the surfaces being aspheric; the fifth lens element with refractive power having a concave image-side surface, at least one of the surfaces being aspheric and having at least one inflection point; an aperture and an image sensing assembly disposed on imaging plane to image a subject. The image pickup optical system satisfies certain conditions. The image pickup optical system possesses good aberration correction and reduces the total length for use in compact cameras and mobile phone cameras with requirement of fine pickup purpose.

Description

technical field [0001] The invention relates to an image-taking optical system; in particular, it provides an optical lens group composed of five lenses with short overall length and low cost for application in electronic products. Background technique [0002] With the advancement of technology, the current trend of electronic product development is mainly towards miniaturization, such as digital still camera (Digital Still Camera), web camera (Web camera), mobile phone camera (mobile phone camera), etc. In addition to a small and low-cost optical lens set, it is also desired to achieve an optical lens set with good aberration correction capability, high resolution, and high imaging quality. [0003] In the imaging optical system of small electronic products, there are known different designs of two-lens, three-lens, four-lens and five-lens types. However, considering the image quality, the four-lens and five-lens optical lens groups It has advantages in aberration correct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/00G02B9/60
CPCG02B13/18G02B13/0045
Inventor 蔡宗翰
Owner LARGAN PRECISION
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