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Optical image capturing system

An optical imaging system and imaging surface technology, applied in optics, optical components, installation, etc., can solve problems such as increased imaging distortion rate, deterioration of peripheral imaging quality, and inability to meet photography requirements

Active Publication Date: 2017-06-27
ABILITY OPTO ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the optical system designed with a large aperture often faces the situation of producing more aberrations, resulting in the deterioration of the surrounding imaging quality and the difficulty of manufacturing, while the optical system designed with a wide viewing angle will face an increase in the distortion rate of imaging. The advanced optical imaging system can no longer meet the higher-level photography requirements

Method used

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Embodiment approach

[0191] The sum of the focal lengths fp of each lens with positive refractive power in the optical imaging system is ΣPP, and the sum of the focal lengths of each lens with negative refractive power is ΣNP. An embodiment of the optical imaging system of the present invention satisfies the following conditions: <ΣPP≤200; and f4 / ΣPP≤0.85. Preferably, the following conditions may be satisfied: 0<ΣPP≤150; and 0.01≤f4 / ΣPP≤0.7. Therefore, it is helpful to control the focusing ability of the optical imaging system, and properly distribute the positive refractive power of the system to suppress the premature occurrence of significant aberrations.

[0192] The optical imaging system may further include an image sensing element disposed on the imaging plane. Half of the diagonal length of the effective sensing area of ​​the image sensing element (that is, the imaging height of the optical imaging system or the maximum image height) is HOI, and the distance from the object side of the fi...

no. 1 example

[0223] Please refer to Figure 1A and Figure 1B ,in Figure 1A Representing a schematic diagram of an optical imaging system according to a first embodiment of the present invention, Figure 1B From left to right are the spherical aberration, astigmatism and optical distortion curves of the optical imaging system of the first embodiment. Figure 1C is a characteristic diagram showing the spectrum modulation conversion of visible light in this embodiment. Figure 1D It is a numerical diagram representing the relative illuminance of each field of view on the imaging surface of the optical imaging system of the first embodiment of the present invention. Depend on Figure 1A It can be seen that the optical imaging system 10 sequentially includes a first lens 110, a second lens 120, an aperture 100, a third lens 130, a fourth lens 140, an infrared filter 170, an imaging surface 180, and an image sensor from the object side to the image side. Element 190.

[0224] The first l...

no. 2 example

[0282] Please refer to Figure 2A and Figure 2B ,in Figure 2A A schematic diagram showing an optical imaging system according to a second embodiment of the present invention, Figure 2B From left to right are the spherical aberration, astigmatism and optical distortion curves of the optical imaging system of the second embodiment. Figure 2C is a characteristic diagram showing the spectrum modulation conversion of visible light in this embodiment. Figure 2D It is a numerical diagram representing the relative illuminance of each field of view on the imaging surface of the optical imaging system of the second embodiment of the present invention. Depend on Figure 2A It can be seen that the optical imaging system 20 sequentially includes a first lens 210, an aperture 200, a second lens 220, a third lens 230, a fourth lens 240, an infrared filter 270, an imaging surface 280, and an image sensor from the object side to the image side. Element 290.

[0283] The first lens 2...

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Abstract

A four-piece optical lens for capturing image and a four-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with positive refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Description

technical field [0001] The invention relates to an optical imaging system, and in particular to a miniaturized optical imaging system applied to electronic products. Background technique [0002] In recent years, with the rise of portable electronic products with photography functions, the demand for optical systems has increased day by day. The photosensitive element of a general optical system is nothing more than a photosensitive coupling device (Charge Coupled Device; CCD) or a complementary metal oxide semiconductor element (Complementary Metal-Oxide Semiconductor duTPor Sensor; CMOS Sensor). The pixel size of components is shrinking, and the optical system is gradually developing into the high-pixel field, so the requirements for image quality are also increasing. [0003] Traditional optical systems mounted on portable devices mostly use two-element or three-element lens structures. However, as portable devices continue to increase the number of pixels and end consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/004G02B13/06G02B13/18G02B7/021G02B9/34G02B13/0055
Inventor 赖建勋刘耀维张永明
Owner ABILITY OPTO ELECTRONICS TECH
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