Image pickup optical lens

A technology of optical lens and optical total length, applied in the field of optical lens, can solve the problem of inability to correct off-axis aberration, and achieve the effect of good optical performance and good imaging quality

Active Publication Date: 2020-05-12
AAC OPTICS (CHANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, rotationally symmetrical aspheric surfaces are mostly used. This type of aspheric surface only has sufficient degrees of freedom in the meridional plane, and cannot correct off-axis aberrations well.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0050] Referring to the accompanying drawings, the present invention provides an imaging optical lens 10 . figure 1 Shown is the imaging optical lens 10 of the first embodiment of the present invention, and the imaging optical lens 10 includes six 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. An optical element such as an optical filter (filter) GF may be disposed between the sixth lens L6 and the image plane Si.

[0051] 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, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a positive refractive power. negative inflection.

[0052] The first lens L1 is mad...

no. 2 approach

[0148] 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.

[0149] Table 4 and Table 5 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 sixth lens L6 are free-form surfaces.

[0150] 【Table 4】

[0151]

[0152] Table 5 shows aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0153] 【table 5】

[0154]

[0155]

[0156] Table 6 shows free-form surface data in the imaging optical lens 20 of the second embodiment of the present invention.

[0157] 【Table 6】

[0158]

[0159] Figure 4 The situation that the RMS spot diameter of the imaging optical lens 20 of the second embodiment is in the first quadrant is shown, according to Figure 4 It ...

no. 3 approach

[0163] 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.

[0164] Table 7 and Table 8 show design data of the imaging optical lens 30 according to the third embodiment of the present invention. Wherein, the object side and the image side of the second lens L2 are free-form surfaces.

[0165] 【Table 7】

[0166]

[0167] 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.

[0168] 【Table 8】

[0169]

[0170] Table 9 shows free-form surface data in the imaging optical lens 30 of the third embodiment of the present invention.

[0171] 【Table 9】

[0172]

[0173] 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 6 It can be seen ...

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PUM

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Abstract

The invention belongs to the field of optical lenses and discloses an image pickup optical lens. The image pickup optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side; at least one of the first lens to the sixth lens comprises a free-form surface; the focal length of the image pickup opticallens is f; the focal length of the first lens is f1; and the focal length of the third lens is f3. The above parameters satisfy the following relational expressions: 0.70<=f1/f<=0.95; 0.80<=f3/f. Theimage pickup optical lens provided by the invention has good optical performance and meets the design requirements of ultra-thinness, wide angle and good imaging quality.

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. At present, rotationally symmetrical aspheric surfaces are mostly used. This type of aspheric surface only has sufficient degrees of freedom in the meridian plane, and cannot correct off-axis 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 improvement of lens imaging requirements, it is ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0015G02B13/0045G02B13/06
Inventor 孙雯夏傑
Owner AAC OPTICS (CHANGZHOU) CO LTD
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