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Camera Optical Lens

An optical lens and lens technology, applied in the field of optical lenses, can solve the problems of unreasonable setting of long focal length, ultra-thinning, focal power, lens spacing and lens shape, etc., and achieve the effect of excellent optical characteristics

Active Publication Date: 2020-12-18
CHANGZHOU RAYTECH OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of technology and the increase of diversified needs of users, as the pixel area of ​​the photosensitive device continues to shrink, and the system’s requirements for imaging quality continue to increase, the eight-piece lens structure gradually appears in the lens design. Common Although the eight-element lens already has good optical performance, its focal power, lens spacing and lens shape settings are still unreasonable, resulting in a lens structure that cannot meet the requirements of long focal length, Ultra-thin design requirements

Method used

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no. 1 approach ）

[0033]With reference to the drawings, the present invention provides an imaging optical lens 10.figure 1 Shown is a schematic structural diagram of an imaging optical lens 10 according to the first embodiment of the present invention. The imaging optical lens 10 includes eight lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens. Lens L6, seventh lens L7, and eighth lens L8. An optical element such as an optical filter GF may be provided between the eighth lens L8 and the image plane Si.

[0034]In this embodiment, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has negative refractive power, and the fifth lens L5 has negative refractive power. , The sixth lens L6 has positive refractive power, th...

no. 2 approach ）

[0163]The second embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.

[0164]Figure 5 Shown is a schematic structural diagram of an imaging optical lens 20 according to the second embodiment of the present invention. In this embodiment, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, and the seventh lens L7 has negative refractive power; The image side of the second lens L2 is concave at the paraxial position, the object side of the fifth lens L5 is convex at the paraxial position, the image side of the fifth lens L5 is concave at the paraxial position, and the image side of the sixth lens L6 is at the paraxial position. Convex surface, the image side of the seventh lens L7 is concave at the paraxial position, the object side of the eighth lens L8 is convex at the paraxial position, and the image side of the eigh...

no. 3 approach ）

[0180]The third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.

[0181]Picture 9 Shown is a schematic structural diagram of an imaging optical lens 30 according to the third embodiment of the present invention. In this embodiment, the fourth lens L4 has a positive refractive power, the seventh lens L7 has a negative refractive power, and the second lens L2 has an image side close to The shaft is concave.

[0182]Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0183]【Table 9】

[0184]

[0185]Table 10 shows aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.

[0186]【Table 10】

[0187]

[0188]Table 11 and Table 12 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 30 of the third...

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Abstract

The invention relates to the field of optical lenses, and discloses a photographic optical lens. The photographic optical lens comprises eight lenses in total, and the eight lenses are sequentially from the object side to the image side: a first lens with positive refractive power, The second lens with negative refractive power, the third lens with negative refractive power, the fourth lens, the fifth lens, the sixth lens with positive refractive power, the seventh lens and the eighth lens with negative refractive power; wherein, The optical total length of the imaging optical lens is TTL, the focal length of the imaging optical lens is f, the focal length of the second lens is f2, the central radius of curvature of the object side of the fifth lens is R9, the central radius of curvature of the fifth lens image side is R10, and Satisfy the following relations: 0.95≤f / TTL; ‑4.00≤f2 / f≤‑1.80; ‑20.00≤(R9+R10) / (R9‑R10)≤‑2.50. The imaging optical lens provided by the invention not only has good optical performance, but also satisfies the design requirements of long focal length and ultrathinness.

Description

Technical field[0001]The present invention relates to the field of optical lenses, and in particular to an imaging optical lens suitable for portable terminal equipment such as smart phones and digital cameras, and imaging devices such as monitors and PC lenses.Background technique[0002]In recent years, with the rise of smart phones, the demand for miniaturized photographic lenses has increased. The photosensitive devices of general photographic lenses are nothing more than charge coupled devices (CCD) or complementary metal oxide semiconductor devices (Complementary Metal -OxideSemiconductor Sensor, CMOS Sensor), and due to the advancement of semiconductor manufacturing technology, the pixel size of photosensitive devices has been reduced, coupled with the development trend of current electronic products with good functions, light, thin and short appearance, so they have good The miniaturized camera lens with image quality has become the mainstream in the current market.[0003]In or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B9/64
Inventor 王小锋
Owner CHANGZHOU RAYTECH OPTRONICS CO LTD
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