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camera lens

A camera lens and lens technology, applied in the field of camera lenses, can solve problems such as insufficient ultra-thinness, 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

[0004] In the imaging lens disclosed in the embodiment of the related art, since the refractive power of each lens is from the first lens to the eighth lens, it is positive and negative positive negative positive negative negative negative, positive negative positive negative positive positive negative negative, positive positive negative positive negative Positive negative negative, positive positive negative positive positive negative negative, so Fno = 1.20 ~ 1.60 bright, but TTL / IH > 1.90 ultra-thin is not enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0204] 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.

[0205] 【Table 1】

[0206]

[0207]

[0208] 【Table 2】

[0209]

[0210]

[0211] 【table 3】

[0212] 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 / I...

Embodiment 2

[0217] 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 to 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. Rate 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.

[0218] 【Table 4】

[0219]

[0220] 【table 5】

[0221]

[0222]

[0223] 【Table 6】

[0224] 2ω(°) 75.1 Fno 1.23 f(mm) 5.086 f1(mm) 5.466 f2(mm) -34.263 f3(mm) -32.009 f4(mm) 42.709 f5(mm) -19.014 f6(mm) 43.550 f7(mm) 3.272 f8(mm) -2.891 TTL(mm) 6.341 LB(mm) 1.077 IH(mm) 3.928 TTL / IH 1.614 ...

Embodiment 3

[0228] 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.

[0229] 【Table 7】

[0230]

[0231] 【Table 8】

[0232]

[0233] 【Table 9】

[0234]

[0235]

[0236] As shown in Table 19, Example 3 satisfies conditional formulas (1) to (7).

[0237] 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. In embod...

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Abstract

The invention provides an imaging lens composed of 8 lenses with excellent optical characteristics, ultra-thin, wide-angle and bright F number. It 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 lens with negative refractive power. The fifth lens, the sixth lens with positive refractive power, the seventh lens with positive refractive power, and the eighth lens with negative refractive power all satisfy a prescribed conditional formula.

Description

【Technical field】 [0001] The present invention relates to an invention of an imaging lens. Especially for mobile phone camera components, WEB camera lenses, etc. that use high-pixel CCD, CMOS and other imaging elements, and have excellent optical characteristics, TTL (optical length) / IH (image height) ≤ 1.65 ultra-thin, field of view (hereinafter referred to as 2ω) is an imaging lens composed of 8 lenses with a wide angle of 70° or more and an F-number (hereinafter referred to as Fno) of 1.45 or less. 【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] In the related art, a camera lens composed of 8 lenses with a bright Fno is proposed. [0004] In the imaging lens d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18G02B9/64G02B13/04
Inventor 寺冈弘之
Owner AAC OPTICS (CHANGZHOU) CO LTD