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Camera shooting optical lens

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

Active Publication Date: 2020-12-18
RUITAI OPTICAL CHANGZHOU 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-element 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 still have certain irrationality, resulting in a lens structure that cannot meet the requirements of large aperture, large aperture, and lens shape while having good optical performance. Ultra-thin, long focal length design requirements

Method used

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  • Camera shooting optical lens
  • Camera shooting optical lens
  • Camera shooting optical lens

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Experimental program
Comparison scheme
Effect test

no. 1 approach ）

[0059] Referring to the accompanying drawings, the present invention provides an imaging optical lens 10 . figure 1 Shown is the imaging optical lens 10 according to the first embodiment of the present invention, and the imaging optical lens 10 includes a total of eight lenses. Specifically, the imaging optical lens 10 is sequentially arranged from the object side to the image side: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, The seventh lens L7 and the 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.

[0060] In this embodiment, the first lens L1 has positive refractive power, the second lens L2 has positive refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has negative refractive power, and the fifth lens L5 has negative refractive power , the sixth lens L6 has a positive refractive power...

no. 2 approach ）

[0187] Figure 5 Shown is the imaging optical lens 20 of the second embodiment of the present invention. 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. Only the differences are listed below.

[0188] The image side of the fifth lens L5 is concave at the paraxial position.

[0189] Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0190] 【table 5】

[0191]

[0192] Table 6 shows the aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0193] 【Table 6】

[0194]

[0195] Table 7 and Table 8 show the design data of inflection point and stagnation point of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0196] 【Table 7】

[0197]

[0198] 【Table 8】

[0199] ...

no. 3 approach ）

[0204] Figure 9 Shown is the imaging optical lens 30 of the third embodiment of the present invention. 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. Only the differences are listed below.

[0205] The object side surface of the eighth lens L8 is convex at the paraxial position.

[0206] Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0207] 【Table 9】

[0208]

[0209] Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.

[0210] 【Table 10】

[0211]

[0212] Table 11 and Table 12 show the design data of the inflection point and the stagnation point of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0213] 【Table 11】

[0214]

[0215] 【Table 12】

...

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Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which comprises eight lenses from an object side to an image side in sequence, namely, a first lens having positive refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, a seventh lens having negative refractive power and an eighth lens having negative refractive power; wherein the total optical length of the camera shooting optical lens is TTL, the focal length of the camera shooting optical lens is f, the focal length of the second lens is f2, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, and the following relational expressions are satisfied: 0.95 < = f / TTL; 3.00 < = f2 / f < =4.50; 0.20 < = (R5 + R6) / (R5-R6) < = 0.90. The camera shooting optical lens provided by the invention has good optical performance and meets the design requirements of large aperture, long focal length and ultra-thinness.

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 Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18G02B9/64G02B27/0025
Inventor 孙雯
Owner RUITAI OPTICAL CHANGZHOU CO LTD