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camera lens

A camera lens and lens technology, applied in the field of camera lens, can solve the problem of insufficient ultra-thinning and achieve the effect of excellent optical characteristics

Active Publication Date: 2021-09-28
AAC OPTICS (CHANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the refractive power of each lens from the 1st lens to the 8th lens, it is positive and negative , so Fno=1.20~1.60 is bright, but TTL / IH>1.90 is not enough for ultra-thin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0215] figure 2 It is an arrangement configuration diagram of the imaging lens LA in the first embodiment. The data in Table 1 include: the radius of curvature R of the object side and the image side of the first lens L1 to the eighth lens L8 constituting the imaging lens LA in Example 1, the center thickness of the lens, the axial distance d between the lenses, and the refractive index. Rate nd, Abbe number νd, effective radius. The data in Table 2 include: conic coefficient k, aspheric coefficient. The data in Table 3 are: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH, TTL / IH.

[0216] 【Table 1】

[0217]

[0218] 【Table 2】

[0219]

[0220]

[0221] 【table 3】

[0222] 2ω(°) 73.6 Fno 1.27 f(mm) 5.162 f1(mm) 5.455 f2(mm) -34.467 f3(mm) -32.337 f4(mm) 38.791 f5(mm) -26.735 f6(mm) 46.588 f7(mm) 3.621 f8(mm) -2.925 TTL(mm) 6.380 LB(mm) 1.055 IH(mm) 3.928 TTL / IH 1.624 ...

Embodiment 2

[0226] Image 6 It is an arrangement configuration diagram of the imaging lens LA in the second embodiment. The data in Table 4 include: the radius of curvature R of the object side and the image side of the first lens L1-the eighth lens L8 constituting the imaging lens LA in Example 2, the center thickness of the lens, the axial distance d between the lenses, and the refractive index nd, Abbe number νd, effective radius. The data in Table 5 include: conic coefficient k, aspheric coefficient. The data in Table 6 are: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH, TTL / IH.

[0227] 【Table 4】

[0228]

[0229]

[0230] 【table 5】

[0231]

[0232] 【Table 6】

[0233]

[0234]

[0235] As shown in Table 19, Example 2 satisfies conditional formulas (1) to (9).

[0236] The axial aberration of camera lens LA among the embodiment 2 sees Figure 7 , chromatic aberration of magnification see Figure 8 , field curvature and distortion see Figure 9 shown. Camera ...

Embodiment 3

[0238] Figure 10 It is an arrangement configuration diagram of the imaging lens LA in the third embodiment. The data in Table 7 include: the curvature radii R of the object side and the image side of the first lens L1 to the eighth lens L8 constituting the imaging lens LA in Example 3, the center thickness of the lenses, the axial distance d between the lenses, and the refractive index. Rate nd, Abbe number νd, effective radius. The data in Table 8 include: conic coefficient k, aspheric coefficient. The data in Table 9 are: 2ω, f, f1, f2, f3, f4, f5, f6, f7, f8, TTL, IH, TTL / IH.

[0239] 【Table 7】

[0240]

[0241]

[0242] 【Table 8】

[0243]

[0244] 【Table 9】

[0245]

[0246]

[0247] As shown in Table 19, Example 3 satisfies conditional formulas (1) to (9).

[0248] The axial aberration of camera lens LA among the embodiment 3 sees Figure 11 , chromatic aberration of magnification see Figure 12 , field curvature and distortion see Figure 13 shown....

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Abstract

The present invention provides an imaging lens composed of 8 lenses with excellent optical characteristics, ultra-thin, wide-angle and bright F number. The imaging lens is arranged sequentially from the object side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fourth lens with negative refractive power. The 5th lens with positive refractive power, the 6th lens with positive refractive power, the 7th lens with positive refractive power, and the 8th lens with negative refractive power, and satisfy the prescribed conditional formula.

Description

technical field [0001] The present invention relates to the field of camera lenses, in particular to mobile phone camera components, WEB camera lenses, etc., which are suitable for using high-pixel CCD, CMOS and other camera elements, and have excellent optical characteristics, TTL (optical length) / IH (image height) ≤ 1.65 Ultra-thin, wide-angle imaging lens with an angle of view (hereinafter abbreviated as 2ω) of 70° or more and an F-number (hereinafter abbreviated as Fno) of 1.45 or less is an imaging lens composed of 8 lenses. Background technique [0002] In recent years, various imaging devices using imaging elements such as CCDs and CMOSs ​​have spread widely. With the miniaturization and high-performance development of these imaging elements, the society needs more and more imaging lenses with excellent optical characteristics, ultra-thin, wide-angle and bright Fno. [0003] A camera lens composed of 8 lenses with a bright Fno disclosed in the related art. Due to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18G02B9/64
Inventor 寺冈弘之
Owner AAC OPTICS (CHANGZHOU) CO LTD