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Camera Optical Lens

A technology of optical lens and optical total length, applied in the field of optical lens, can solve problems such as inability to correct aberrations well, insufficient ultra-thin lens and wide-angle lens, insufficient setting of lens shape, etc.

Active Publication Date: 2020-10-27
CHANGZHOU RAYTECH OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The focal power allocation, lens spacing and lens shape settings of the existing structure are insufficient, resulting in insufficient ultra-thin lens and insufficient wide-angle lens
And rotationally symmetric aspheric surfaces do not correct aberrations well

Method used

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  • Camera Optical Lens
  • Camera Optical Lens
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example ）

[0056] With reference to the accompanying drawings, the present invention provides an imaging optical lens. figure 1 Shown is the imaging optical lens according to the first embodiment of the present invention, and the imaging optical lens includes eight lenses. Specifically, the photographing optical lens includes in sequence from the object side to the image side: a first lens L1, a second lens L2, an aperture S1, a third lens L3, a fourth lens L4, a fifth lens L5, and a 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.

[0057] The first lens L1 has negative refractive power, the second lens L2 has positive refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has Negative refractive power, the seventh lens L...

no. 2 approach ）

[0184] 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.

[0185] In this embodiment, the object side of the fourth lens L4 is concave at the paraxial position.

[0186] Table 4, Table 5, and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention. Wherein, the object side and the image side of the first lens L1 are free curved surfaces.

[0187] 【Table 4】

[0188]

[0189] Table 5 shows aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0190] 【table 5】

[0191]

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

[0193] 【Table 6】

[0194]

[0195] Figure 4 The situation that the RMS spot diameter...

no. 3 approach ）

[0199] 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.

[0200] Table 7, Table 8 and Figure 9 Design data of the imaging optical lens 30 according to the third embodiment of the present invention are shown. Wherein, the object side and the image side of the third lens L3 are free curved surfaces.

[0201] 【Table 7】

[0202]

[0203] Table 8 shows the aspheric surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0204] 【Table 8】

[0205]

[0206] Table 9 shows free-form surface data in the imaging optical lens 30 of the third embodiment of the present invention.

[0207] 【Table 9】

[0208]

[0209] Figure 6 The situation that the RMS spot diameter of the imaging optical lens 30 of the third embodiment is in the first quadrant is shown, according to Figure...

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Abstract

The invention relates to the field of optical lenses, and discloses a photographic optical lens. The photographic optical lens comprises eight lenses in total. The eight lenses are sequentially from the object side to the image side: a first lens with negative refractive power, with The second lens with positive refractive power, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens; the object side of the eighth lens is convex at the near axis, and the image side is at the near axis The axis is concave, and at least one of the first lens to the eighth lens has a free-form surface. The imaging optical lens of the invention has good optical performance while having large aperture, ultra-thinning and widening angle.

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] With the development of imaging lenses, people have higher and higher requirements for lens imaging, and the "night scene photography" and "background blur" of lenses have also become important indicators for measuring lens imaging standards. The focal power distribution of the existing structure, lens spacing and lens shape settings are insufficient, resulting in insufficient lens ultra-thinning and wide-angle. And rotationally symmetric aspheric surfaces cannot correct aberrations well. Freeform surface is a non-rotationally symmetrical surface type, which can better balance aberrations and improve imaging quality, and the processing of freeform surfaces has gradually matured. With the improveme...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B13/06
CPCG02B13/0045G02B13/06G02B9/64G02B13/04G02B13/18
Inventor 孙雯
Owner CHANGZHOU RAYTECH OPTRONICS CO LTD