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Image pickup optical lens

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

Active Publication Date: 2021-01-15
RUISHENG OPTOELECTRONICS TECH SUZHOU 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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Experimental program
Comparison scheme
Effect test

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. Specifically, the left side is the object side, and the right side is the image side, and the imaging optical lens 10 includes in sequence from the object side to the image side: an aperture S1, a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4, fifth lens L5, sixth 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 positive refractive power, the second lens L2 has positive refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has negative refractive power, and ...

no. 2 approach

[0167] Figure 5 Shown is a schematic structural view of the imaging optical lens 20 according to 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.

[0168] In this embodiment, the fourth lens L4 has positive refractive power, and the eighth lens L8 has positive refractive power.

[0169] Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0170] 【table 5】

[0171]

[0172] 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.

[0173] 【Table 6】

[0174]

[0175] 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 embodimen...

no. 3 approach

[0184] Figure 9 Shown is a schematic structural diagram of 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 symbols are the same as those of the first embodiment. Only the differences are listed below.

[0185] In this embodiment, fourth lens L4 has positive refractive power.

[0186] Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0187] 【Table 9】

[0188]

[0189] Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.

[0190] 【Table 10】

[0191]

[0192] 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.

[0193] 【Table 11】

[0194] ...

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Abstract

The invention relates to the field of optical lenses, and discloses an image pickup optical lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, asixth lens, a seventh lens and an eighth lens from an object side to an image side, and the first lens has positive refractive power; the total optical length of the image pickup optical lens is TTL,the focal length of the image pickup optical lens is f, the focal length of the second lens is f2, the central curvature radius of the object side surface of the seventh lens is R13, the central curvature radius of the image side surface of the seventh lens is R14, and the following relational expressions are satisfied: 0.95<=f / TTL; 2.00<=f2 / f<=5.00; -20.00<=(R13+R14) / (R13-R14)<=-3.00. The imagepickup optical lens provided by the invention has good optical performance and also meets the design requirements of 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 photocoupled 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 mainstream in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18G02B9/64
Inventor 朱军彦
Owner RUISHENG OPTOELECTRONICS TECH SUZHOU CO LTD
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