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Zoom lens and imaging apparatus

A zoom lens, image-side technology, applied in optical components, instruments, optics, etc., can solve the problem of high aberration of zoom lens magnification, and achieve the effects of aberration fluctuation suppression, miniaturization, and good optical performance.

Pending Publication Date: 2021-02-23
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, with the zoom lens described in Patent Document 1, it cannot be said that the magnification is sufficiently high, or that fluctuations in various aberrations during magnification change are not sufficiently suppressed.
The zoom lens described in Patent Document 2 has room for improvement in miniaturization

Method used

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  • Zoom lens and imaging apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0193] A cross-sectional view and a moving track of the structure of the zoom lens of Embodiment 1 are shown in figure 1 , and its illustration method and structure are as described above, so a part of repeated description is omitted here. The zoom lens of Embodiment 1 includes, from the object side to the image side, a first lens group G1 with positive refractive power, a second lens group G2 with negative refractive power, an aperture stop St, a third lens group G3 with positive refractive power, and a third lens group G3 with negative refractive power. The 4th lens group G4 with refractive power and the 5th lens group G5 with positive refractive power. When zooming, all the lens groups move along the optical axis Z by changing all the intervals between adjacent lens groups. The aperture stop St, the third lens group G3, and the fifth lens group G5 move integrally when changing the magnification. The first lens group G1 includes three lenses of lenses L11 to L13 in this or...

Embodiment 2

[0219] A cross-sectional view and a moving track of the structure of the zoom lens of Example 2 are shown in Figure 4 . The zoom lens of Example 2 has the same configuration as that of the zoom lens of Example 1 in outline. Regarding the zoom lens of Example 2, the basic lens data are shown in Table 4, the specifications and variable surface intervals are shown in Table 5, the aspheric coefficients are shown in Table 6, and the aberration diagrams are shown in Table 6. Figure 5 .

[0220] [Table 4]

[0221] Example 2

[0222] sn R D Nd νd θgF Material 1 75.43404 1.700 1.72825 28.46 0.60772 S-TIH10.OHARA 2 50.92945 7.510 1.49700 81.61 0.53887 FCD1.HOYA 3 655.04512 0.150 4 75.29607 3.772 1.61800 63.33 0.54414 S-PHM52.OHARA 5 207.30462 DD[5] *6 35.43465 1.600 1.80625 40.91 0.56920 L-LAH53.OHARA *7 10.88801 6.955 8 -65.17996 0.710 1.85150 40.78 0.56958 S-LAH89...

Embodiment 3

[0231] A cross-sectional view and a moving track of the structure of the zoom lens of Example 3 are shown in Figure 6 . The zoom lens of Example 3 has the same configuration as that of the zoom lens of Example 1 in outline. Regarding the zoom lens of Example 3, the basic lens data are shown in Table 7, the specifications and variable surface intervals are shown in Table 8, the aspheric coefficients are shown in Table 9, and the aberration diagrams are shown in Table 9. Figure 7 .

[0232] [Table 7]

[0233] Example 3

[0234] sn R D Nd νd θgF Material 1 74.97977 1.700 1.72825 28.46 0.60772 S-TIH10.OHARA 2 50.13533 7.510 1.49700 81.61 0.53887 FCD1.HOYA 3 528.12157 0.150 4 73.28678 3.986 1.61800 63.33 0.54414 S-PHM52.OHARA 5 224.08849 DD[5] *6 36.13808 1.600 1.85400 40.38 0.56890 L-LAH85V.OHARA *7 11.03500 6.500 8 -73.75388 0.700 1.83481 42.72 0.56486 S-LAH5...

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Abstract

The present disclosure is to provide a zoom lens that suppresses a change in various types of aberration in a case of zooming while having a high magnification and has a reduced size and favorable optical performance, and an imaging apparatus comprising the zoom lens. The zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a fifth lens group in order from an object side. In a case of zooming, an interval with an adjacent lens group is changed. The third lens group includes two positive lenses consecutivelyarranged in order from a side closest to the object side to an image side. The fifth lens group consists of a negative meniscus lens having a concave surface toward the object side and a positive lens having a convex surface toward the object side in order from the object side to the image side.

Description

technical field [0001] The invention relates to a zoom lens and an imaging device. Background technique [0002] Conventionally, as a lens system applicable to an imaging device such as a digital camera, a zoom lens having a five-group structure as described in the following Patent Document 1 and the following Patent Document 2, for example, is known. The following Patent Document 1 describes a zoom lens comprising, in order from the object side, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a lens group having negative refractive power. The 4th lens group and the 5th lens group with negative refractive power. The following Patent Document 2 describes a zoom lens comprising, in order from the object side, a first lens group having positive refractive power, a second lens group having negative refractive power, a positive C lens group having positive refracti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14G02B15/16
CPCG02B15/145121G02B15/145105G02B15/16G02B15/145129G02B13/18G02B15/20G02B27/646G02B15/1451
Inventor 野田大雅长伦生
Owner FUJIFILM CORP