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: 2020-12-15
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 ）

[0032] Referring to the accompanying drawings, the present invention provides an imaging optical lens 10 . figure 1 Shown is a schematic structural view of the imaging optical lens 10 according to the first embodiment of the present invention, and the imaging optical lens 10 includes eight lenses in total. Specifically, the imaging optical lens 10, from the object side to the image side in sequence: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens Lens L6, seventh lens L7, and eighth lens L8. An optical element such as an optical filter (filter) GF may be disposed between the eighth lens L8 and the image plane Si.

[0033] In this embodiment, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, and the fifth lens L5 has a positive refractive power , the sixth lens L6 has a ...

no. 2 approach ）

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

[0164] Figure 5 Shown is a schematic structural view of the imaging optical lens 20 according to the second embodiment of the present invention. In this embodiment, the sixth lens L6 has a positive refractive power, the image side of the first lens L1 is concave at the paraxial position, and the second lens L2 The object side surface of the third lens L3 is convex at the paraxial position, and the object side surface of the third lens L3 is convex at the paraxial position.

[0165] Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0166] 【table 5】

[0167]

[0168] Table 6 shows the aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the presen...

no. 3 approach ）

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

[0181] Figure 9 Shown is a schematic structural view of the imaging optical lens 30 according to the third embodiment of the present invention. In this embodiment, the sixth lens L6 has a positive refractive power, the image side of the first lens L1 is concave at the paraxial position, and the second lens L1 The object side surface of L2 is convex at the paraxial position, and the object side surface of the third lens L3 is convex at the paraxial position.

[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 the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.

[0186] 【Tab...

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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 in order from the object side to the image side: the first lens with positive refractive power, and the first lens with negative refractive power. The second lens with negative refractive power, the third lens with positive refractive power, the fifth lens with positive refractive power, the sixth lens with refractive power, the seventh lens with negative refractive power and the The eighth lens with negative refractive power; wherein, the total optical 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, and the object side of the fifth lens is The central radius of curvature is R9, the central radius of curvature of the image side of the fifth lens is R10, and satisfies the following relational formula: 0.95≤f / TTL; -5.00≤f2 / f≤-2.00; 0.40≤(R9+R10) / (R9‑R10)≤1.00. 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 invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal devices 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 been increasing, and the photosensitive devices of general photographic lenses are nothing more than photosensitive coupling devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductor devices (Complementary Metal -Oxide Semiconductor Sensor, CMOS Sensor), and due to the improvement of semiconductor manufacturing process technology, the pixel size of photosensitive devices has been reduced, and today's electronic products are developing with good functions and thin, light and small appearance. Therefore, it has Miniaturized camera lenses with good imaging quality have become the ma...

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 孙伟
Owner CHANGZHOU RAYTECH OPTRONICS CO LTD
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