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optical imaging 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, failure to meet photography requirements, and manufacturing difficulty

Active Publication Date: 2018-09-04
ABILITY OPTO ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 peripheral 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

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Experimental program
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Embodiment approach

[0152] 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 0 <f1 / ΣPP≦0.8. Preferably, the following conditions can be met: 0 <ΣPP≦150; and 0.01≦f1 / ΣPP≦0.6. 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.

[0153] The first lens may have positive refractive power, and its object side surface may be convex. Therefore, the positive refractive power strength of the first lens can be adjusted appropriately, which helps to shorten the total length of the optical imaging system.

[0154] The second lens may have negative refractive power. As a result, the aberrat...

no. 1 example

[0188] Please refer to Figure 1A and Figure 1B ,among them Figure 1A Shows a schematic diagram of an optical imaging system according to the 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 This is a TV distortion curve diagram of the optical imaging system of the first embodiment. by Figure 1A It can be seen that from the object side to the image side, the optical imaging system includes an aperture 100, a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, an infrared filter 170, an imaging surface 180, and an image sensing element in sequence. 190.

[0189] The first lens 110 has positive refractive power and is made of plastic material. The object side 112 is convex, the image side 114 is concave, and both are aspherical, and both the object side 112 and the image side 114 have an inflection point...

no. 2 example

[0240] Please refer to Figure 2A and Figure 2B ,among them Figure 2A Shows a schematic diagram of an optical imaging system according to the second embodiment of the present invention, 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 This is a TV distortion curve diagram of the optical imaging system of the second embodiment. by Figure 2A It can be seen that the optical imaging system 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 sensing element from the object side to the image side. 290.

[0241] The first lens 210 has positive refractive power and is made of plastic material. Its object side surface 212 is convex, and its image side surface 214 is convex, both of which are aspherical. The object side surface 212...

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Abstract

The invention discloses an optical imaging system, which sequentially includes a first lens, a second lens, a third lens and a fourth lens from the object side to the image side. The first lens has positive refractive power, and its object side can be convex. The second lens to the third lens have refractive power, and both surfaces of the aforementioned lenses may be aspherical. The fourth lens can have negative refractive power, its image side can be concave, and both surfaces can be aspheric, wherein at least one surface of the fourth lens has an inflection point. The lenses with refractive power in the optical imaging system are the first lens to the fourth lens. When specific conditions are met, it can have greater light collection and better optical path adjustment capabilities to improve imaging quality.

Description

Technical field [0001] The invention relates to an optical imaging system group, and in particular to an electronic product [0002] Miniaturized optical imaging system on top. Background technique [0003] 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 Charge Coupled Device (CCD) or Complementary Metal-Oxide SemiconduTPor Sensor (CMOS Sensor). With the improvement of semiconductor manufacturing technology, As the pixel size of the photosensitive element is reduced, the optical system gradually develops into the field of high pixels, so the requirements for image quality are also increasing. [0004] Traditional optical systems mounted on portable devices mostly use two or three-element lens structures. However, as portable devices continue to increase pixels and end consumers’ needs for large apertures, such as low-l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00
CPCG02B13/004G02B9/34G02B27/0025
Inventor 刘耀维张永明
Owner ABILITY OPTO ELECTRONICS TECH
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