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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 long focal length, ultra-thinning, optical power, unreasonable lens spacing and lens shape settings, and achieve the effect of excellent optical characteristics

Active Publication Date: 2020-11-13
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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Experimental program
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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. Specifically, the photographing 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, a fourth lens L4, a fifth lens L5, a 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 ...

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.

[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 present invention.

[0169] 【Table 6】

[0170]

[0171] 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.

[0172] 【Table 7】

[0173]

[0174] 【Table 8】

[0175]

[0176] Figure 6 , Fig...

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 of the third embodiment of the present invention. In this embodiment, the fourth lens L4 has a negative refractive power, the image side of the first lens L1 is convex at the paraxial position, and the third lens L3 The side of the object is concave near the axis.

[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] 【Table 10】

[0187]

[0188] Table 11 and Table 12 show the design data of the inflection point and the stagnatio...

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Abstract

The invention relates to the field of optical lenses and discloses a camera shooting optical lens. The camera shooting optical lens comprises eight lenses in total, wherein the eight lenses are sequentially a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens, a fifth lens with positive refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power and an eighth lens with negative refractive power from the object side to the image side, 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 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, -4.50< / = f2 / f < / =-2.00, -0.90 < / = (R13+R14) / (R13-R14) < / =-0.25. The camera shooting optical lens provided by the invention has good optical performance and further meets 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 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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IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B9/64
Inventor 石荣宝
Owner CHANGZHOU RAYTECH OPTRONICS CO LTD
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