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Camera Optical Lens

A technology of optical lens and optical total length, which is applied in the field of optical lens, can solve the problems of focal length distribution, lens spacing, lens shape irrationality, lens structure can not meet optical performance, etc., and achieve the effect of good optical performance

Active Publication Date: 2020-10-16
AAC OPTICS (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 four-piece lens structure gradually appears in the lens design. Common Although the four-piece lens already has good optical performance, its focal length allocation, lens spacing, lens shape and other settings still have certain irrationality, resulting in a lens structure that cannot meet the wide-angle and wide-angle requirements while having good optical performance. Ultra-thin design requirements

Method used

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Experimental program
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no. 1 approach ）

[0056] Referring to the accompanying drawings, the present invention provides an imaging optical lens 10 . figure 1Shown is the imaging optical lens 10 of the first embodiment of the present invention, and the imaging optical lens 10 includes four lenses. Specifically, the imaging optical lens 10 includes, in order from the object side to the image side: a first lens L1 , an aperture S1 , a second lens L2 , a third lens L3 and a fourth lens L4 . In this embodiment, preferably, an optical element such as a glass plate GF is arranged between the fourth lens L4 and the image plane Si, where the glass plate GF can be a glass cover or an optical filter (filter). In other possible implementation manners, the glass plate GF can also be arranged at other positions.

[0057] In this embodiment, the first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a positive refractive power, and the fourth lens L4 has a negative r...

no. 2 approach ）

[0153] Figure 5 It is a schematic structural view of the imaging optical lens 20 in the second embodiment. The second embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. Only the differences are listed below.

[0154] Table 5 shows design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0155] 【table 5】

[0156]

[0157] Table 6 shows aspheric surface data of each lens of the imaging optical lens 20 according to the second embodiment of the present invention.

[0158] 【Table 6】

[0159]

[0160] Table 7 and Table 8 show the design data of inflection point and stagnation point of each lens in the imaging optical lens 20 of the embodiment of the present invention.

[0161] 【Table 7】

[0162]

[0163] 【Table 8】

[0164]

[0165] Figure 6 , Figure 7 Schematic diagrams of axial aberration and lateral chromatic aberration of light with wavelen...

no. 3 approach ）

[0170] Figure 9 It is a schematic structural view of the imaging optical lens 30 in the third embodiment. The third embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. Only the differences are listed below.

[0171] In this embodiment, the second lens L2 has a negative refractive power; the object side of the second lens L2 is concave at the paraxial position, and the image side of the second lens L2 is convex at the paraxial position.

[0172] Table 9 shows design data of the imaging optical lens 30 of the third embodiment of the present invention.

[0173] 【Table 9】

[0174]

[0175] Table 10 shows aspherical surface data of each lens of the imaging optical lens 30 according to the third embodiment of the present invention.

[0176] 【Table 10】

[0177]

[0178] Table 11 and Table 12 show the design data of inflection point and stagnation point of each lens in the imaging optical lens 30 of the embo...

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Abstract

The invention relates to the field of optical lenses, and discloses a photographic optical lens comprising four lenses in total, and the four lenses are in sequence from the object side to the image side: a first lens, a second lens, a third lens and a fourth lens The focal length of the imaging optical lens as a whole is f, the focal length of the first lens is f1, the focal length of the third lens is f3, the radius of curvature of the object side of the first lens is R1, and the radius of curvature of the image side of the first lens is R2, The radius of curvature of the object side of the second lens is R3, the radius of curvature of the image side of the second lens is R4, the axial thickness of the second lens is d3, and the axis of the image side of the second lens to the object side of the third lens The distance is d4, the on-axis thickness of the third lens is d5, and the on-axis distance from the image side of the third lens to the object side of the fourth lens is d6, satisfying the following relationship: ‑3.50≤f1 / f≤‑2.00; 0.55 ≤f3 / f≤0.75; 5.00≤d3 / d4≤15.00; 5.00≤d5 / d6≤35.00; ‑20.00≤(R3+R4) / (R3‑R4)≤‑3.00; ‑5.00≤R1 / R2≤‑2.00 . The camera optical lens can meet the design requirements of wide-angle and ultra-thin while having good optical performance.

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): G02B13/00G02B13/18G02B13/06
CPCG02B13/004G02B13/06G02B9/34
Inventor 于东
Owner AAC OPTICS (CHANGZHOU) CO LTD