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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 brightness, insufficient power distribution of the third lens, insufficient focal length ratio of power distribution, and insufficient shape of the first lens, etc., to achieve good The effect of optical properties

Active Publication Date: 2018-12-18
AAC OPTICS (CHANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The imaging lenses disclosed in Embodiments 1, 3, 4, and 5 of Patent Document 1 are imaging lenses composed of the above-mentioned five lenses, but due to the power distribution of the third lens, the fourth lens, and the fifth lens, and the first lens Neither the ratio to the focal length of the second lens nor the shape of the first lens is sufficient, so the brightness at Fno=2.25 is not sufficient
[0005] The imaging lens disclosed in the embodiment of Patent Document 2 is an imaging lens composed of the above-mentioned five lenses, but since the power distribution of the third lens is insufficient, the brightness of Fno ≥ 2.25 is insufficient.

Method used

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Embodiment 1

[0157] figure 2 It is a configuration diagram showing the arrangement of the imaging lens LA of the first embodiment. The object-side and image-side curvature radii R of the first lens L1 to the fifth lens L5 constituting the imaging lens LA of Example 1, the center thickness of the lenses or the axial distance d between lenses, the refractive index nd, and the Abbe number νd is shown in Table 1, and the cone coefficient k and aspheric coefficient are shown in Table 2.

[0158] 【Table 1】

[0159]

[0160] 【Table 2】

[0161]

[0162] Table 5 to be described later shows the respective numerical values ​​of Examples 1 and 2 and numerical values ​​corresponding to parameters defined by relational expressions (1) to (7).

[0163]Example 1, as shown in Table 5, satisfies relational expressions (1) to (7).

Embodiment 2

[0166] Figure 6 It is a configuration diagram showing the arrangement of the imaging lens LA of the second embodiment. The object-side and image-side curvature radii R of the first lens L1 to the fifth lens L5 constituting the imaging lens LA of Example 2, the lens center thickness or the inter-lens axial distance d, the refractive index nd, and the Abbe number νd is shown in Table 3, and the cone coefficient k and aspheric coefficient are shown in Table 4.

[0167] 【table 3】

[0168]

[0169] 【Table 4】

[0170]

[0171] Example 2, as shown in Table 5, satisfies relational expressions (1) to (7).

[0172] The spherical aberration of the imaging lens LA of embodiment 2 is as follows Figure 7 As shown, the chromatic aberration of magnification is as Figure 8 As shown, field curvature and distortion as Figure 9 shown. The imaging lens LA of embodiment 2 is as Figure 7-9 It can be seen that TTL / IH=1.464, ultra-thin to Fno=2.00, and Fno is bright, and has good op...

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Abstract

The invention provides a camera lens having excellent optical character, being ultra-thin, having a F-value of lower than 2.05 in luminous flux, and formed from five lenses. A first lens having positive refraction power, a second lens having negative refraction power, a third lens having negative refraction power, a fourth lens having positive refraction power and a fifth lens having negative refraction power are arranged from the object-side succesively, a specified relationship equation being satisfied.

Description

technical field [0001] The present invention relates to a camera lens, especially relates to the application in the module camera of mobile phone, WEB camera etc. that use the camera element such as CCD, CMOS of high pixel, have good optical characteristic, ultra-thin to TTL (optical length) / IH (image lens) High) ≤ 1.50, and an imaging lens composed of five lenses having an F-number (hereinafter referred to as Fno) of luminous flux of 2.05 or less. Background technique [0002] In recent years, various imaging devices using imaging elements such as CCDs and CMOSs ​​have spread widely. Along with miniaturization and high performance of these imaging elements, there is a demand for an imaging lens that has good optical characteristics, is ultra-thin, and has a high luminous flux of Fno. [0003] The technological development related to the imaging lens composed of 5 lenses with excellent optical characteristics, ultra-thin and high luminous flux of Fno is advancing continuous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18G02B9/60G02B13/009G02B27/0037
Inventor 赵青寺岡弘之
Owner AAC OPTICS (CHANGZHOU) CO LTD