Camera optics

An optical lens and lens technology, 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: 2022-07-12
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

[0033] Referring to the accompanying drawings, the present invention provides an imaging optical lens 10 . figure 1 Shown is a schematic structural diagram 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 imaging optical lens 10, from the object side to the image side, sequentially includes: 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, eighth lens L8. Optical elements such as an optical filter GF may be provided between the eighth lens L8 and the image plane Si.

[0034] 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 positive refractive power, the fourth lens L4 has a negative refractive power, and the fifth lens L5 has a positive refractive power , the sixth lens L6 h...

no. 2 approach

[0165] The second embodiment is basically the same as the first embodiment, the meanings of symbols are the same as those of the first embodiment, and only the differences are listed below.

[0166] Figure 5 Shown is a schematic structural diagram of the imaging optical lens 20 according to the second embodiment of the present invention. In this embodiment, the fifth lens L5 has a negative refractive power.

[0167] Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0168] 【table 5】

[0169]

[0170] Table 6 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0171] 【Table 6】

[0172]

[0173] Table 7 and Table 8 show the design data of the inflection point and the stagnation point of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0174] 【Table 7】 ...

no. 3 approach

[0182] The third embodiment is basically the same as the first embodiment, the meanings of symbols are the same as those of the first embodiment, and only the differences are listed below.

[0183] Figure 9 Shown is a schematic structural diagram of the imaging optical lens 30 according to the third embodiment of the present invention. In this embodiment, the fifth lens L5 has a negative refractive power, and the object side of the sixth lens L6 is convex at the paraxial position.

[0184] Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0185] 【Table 9】

[0186]

[0187]

[0188] Table 10 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0189] 【Table 10】

[0190]

[0191]

[0192] Table 11 and Table 12 show the inflection point and stagnation point design data of each lens in the imaging optica...

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Abstract

The invention relates to the field of optical lenses, and discloses an imaging optical lens. The imaging optical lens sequentially includes: a first lens with positive refractive power, a second lens, a third lens, and a fourth lens from the object side to the image side , the fifth lens, the sixth lens, the seventh lens and the eighth lens; wherein, the optical total length of the imaging optical lens is TTL, the focal length of the imaging optical lens is f, and the focal length of the second lens is f2, The central radius of curvature of the object side of the fourth lens is R7, the central radius of curvature of the image side of the fourth lens is R8, and the following relational expressions are satisfied: 0.95≤f / TTL; ‑4.00≤f2 / f≤‑1.90; ‑15.00≤(R7+R8) / (R7‑R8)≤‑2.50. The imaging optical lens provided by the invention not only has good optical performance, but also meets the design requirements of long focal length and ultra-thinning.

Description

technical field [0001] The invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as 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 is increasing, and the photosensitive devices of general photographic lenses are nothing more than Charge Coupled Device (CCD) or Complementary Metal Oxide Semiconductor Device (Complementary Metal Semiconductor). -OxideSemiconductor Sensor, CMOS Sensor), and due to the improvement of semiconductor manufacturing technology, the pixel size of the photosensitive device has been reduced, and the current electronic products have a trend of good functions, light, thin, and short appearance. The miniaturized camera lens with imaging quality has become the mainstream in the current market. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18G02B9/64G02B27/0025
Inventor 卞旭琪
Owner CHANGZHOU RAYTECH OPTRONICS CO LTD
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