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Optical image capturing system

An optical imaging system and imaging surface technology, applied in optics, optical components, instruments, etc., can solve problems such as increased imaging distortion rate, deterioration of peripheral imaging quality, and difficulty in manufacturing

Active Publication Date: 2017-01-25
ABILITY OPTO ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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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Examples

Experimental program
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Embodiment approach

[0190] The sum of the focal length fp of each lens with positive refractive power of the optical imaging system is ΣPP, and the sum of the focal length 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 can be met: 0 <ΣPP≤150; and 0.01≤f4 / ΣPP≤0.7. Thus, it helps to control the focusing ability of the optical imaging system, and appropriately distribute the positive refractive power of the system to suppress the premature generation of significant aberrations.

[0191] The first lens may have negative refractive power. As a result, the light-receiving ability of the first lens can be appropriately adjusted and the viewing angle can be increased.

[0192] The second lens may have positive refractive power. The third lens may have positive refractive power.

[0193] The fourth lens may have negative refractive power,...

no. 1 example

[0230] Please refer to Figure 1A and Figure 1B ,among them Figure 1A A schematic diagram of an optical imaging system according to the first embodiment of the present invention is shown, Figure 1B From left to right, the spherical aberration, astigmatism, and optical distortion curves of the optical imaging system of the first embodiment are shown in sequence. Figure 1C Is a diagram showing the characteristics of the visible light spectrum modulation conversion of this embodiment; Figure 1D It is a graph showing the infrared spectrum modulation conversion characteristic of this embodiment. by Figure 1A It can be seen that from the object side to the image side, the optical imaging system 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 sensing element in sequence. 190.

[0231] The first lens 110 has a negative refractive power and is made of glass. The object side 1...

no. 2 example

[0283] Please refer to Figure 2A and Figure 2B ,among them Figure 2A A schematic diagram of an optical imaging system according to the second embodiment of the present invention is shown, Figure 2B From left to right, the spherical aberration, astigmatism, and optical distortion curves of the optical imaging system of the second embodiment are shown in sequence. Figure 2C Is a diagram showing the characteristics of the visible light spectrum modulation conversion of this embodiment; Figure 2D It is a graph showing the infrared spectrum modulation conversion characteristic of this embodiment. by Figure 2A It can be seen that, from the object side to the image side, the optical imaging system includes a first lens 210, a second lens 220, an aperture 200, a third lens 230, a fourth lens 240, an infrared filter 270, an imaging surface 280, and an image sensing element in sequence. 290.

[0284] The first lens 210 has a negative refractive power and is made of plastic material. ...

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Abstract

An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. At least one lens among the first to the fifth lenses has positive refractive force. The fifth lens can have negative refractive force, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the fifth lenses. The optical image capturing system can increase aperture value and improve the imaging 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. The photosensitive elements of general optical systems are nothing more than photosensitive coupled devices (Charge Coupled Device; CCD) or Complementary Metal-Oxide Semiconductor (Complementary Metal-Oxide Semiconductor Sensor; CMOS Sensor). With the improvement of semiconductor manufacturing technology, the photosensitive The pixel size of the component is reduced, and the optical system is gradually developing in the field of high pixels, so the requirements for image quality are also increasing. [0003] Traditional optical systems mounted on portable devices mostly use two or three-element lens structures. However, as portable devices continue to in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/14
CPCG02B13/004G02B13/008G02B13/146G02B13/06G02B9/34G02B27/646
Inventor 刘耀维张永明
Owner ABILITY OPTO ELECTRONICS TECH
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