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Imaging lens, imaging device, and mobile terminal

A camera lens, lens technology, used in image communication, instruments, television, etc., can solve problems such as large aberrations

Active Publication Date: 2016-12-28
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the imaging lens described in the above-mentioned Patent Document 2, the shape of the object side surface of the fourth lens is close to a spherical shape. The lens is incident from the side of the object, resulting in large aberrations

Method used

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  • Imaging lens, imaging device, and mobile terminal
  • Imaging lens, imaging device, and mobile terminal
  • Imaging lens, imaging device, and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0283] The data of the lens surface of Example 1 are shown in Table 1 below.

[0284] [Table 1]

[0285]

[0286]

[0287] Table 2 below shows the aspheric coefficients of the lens surfaces of Example 1. As shown in FIG.

[0288] [Table 2]

[0289]

[0290]

[0291] where, after this (including the lens data in the table), use e (eg 2.5e-002) to represent a power of 10 multiplier (eg 2.5×10 -002 ).

[0292] The characteristics of the imaging lens of Example 1 are listed below.

[0293]

[0294] Here, FL means the focal length of the entire system of the imaging lens, Fno means the F number, w means the diagonal angle of view, Ymax means half of the diagonal length of the imaging surface of the imaging element, BF means the back focal length, and TL means the full length of the system. In addition, the above code|symbol has the same meaning also in the following Example.

[0295] Data for a single lens of Example 1 are shown in Table 3 below.

[0296] [tab...

Embodiment 2

[0301] The data of the lens surface of Example 2 are shown in Table 4 below.

[0302] [Table 4]

[0303]

[0304] Table 5 below shows the aspheric coefficients of the lens surfaces of Example 2. As shown in FIG.

[0305] [table 5]

[0306]

[0307]

[0308] The characteristics of the imaging lens of Example 2 are listed below.

[0309]

[0310] Data for a single lens of Example 2 are shown in Table 6 below.

[0311] [Table 6]

[0312]

[0313] Figure 8 It is a cross-sectional view of the imaging lens 12 and the like of the second embodiment. The imaging lens 12 includes, in order from the object side: a nearly plano-convex crescent-shaped first lens L1 having a positive refractive power around the optical axis AX and having a convex surface facing the object side; and a negative refractive power around the optical axis AX. A crescent-shaped second lens L2 with a convex surface facing the object side; a biconvex third lens L3 with a weaker positive refract...

Embodiment 3

[0316] The data of the lens surface of Example 3 are shown in Table 7 below.

[0317] [Table 7]

[0318]

[0319]

[0320] Table 8 below shows the aspheric coefficients of the lens surfaces of Example 3. As shown in FIG.

[0321] [Table 8]

[0322]

[0323]

[0324] The characteristics of the imaging lens of Example 3 are listed below.

[0325]

[0326] Data for a single lens of Example 3 is shown in Table 9 below.

[0327] [Table 9]

[0328]

[0329] Figure 10It is a sectional view of the imaging lens 13 etc. of Example 3. The imaging lens 13 includes, in order from the object side: a nearly plano-convex crescent-shaped first lens L1 having a positive refractive power around the optical axis AX and having a convex surface facing the object side; and a negative refractive power around the optical axis AX. A crescent-shaped second lens L2 with a convex surface facing the object side; a nearly plano-convex crescent-shaped third lens L3 with a weaker posi...

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Abstract

The purpose of the invention is to provide a camera lens formed by five lenses. Though smaller than a conventional camera lens, the camera lens has less diffused light and well corrects various aberrations. The camera lens (10) forms the image of a captured object on the capturing surface (projected surface)(I)of a capturing element (51). From an object side, a positive first lens (L1) with a convexity facing the object side, a second lens (L2) forming a negative lens near an optical axis AX, a third lens (L3), a fourth lens (L4), and a negative fifth lens (L5) with a concavity facing the object side are successively arranged. As for the camera lens (10), a conditional expression 0.015<AS7 / f<0.07...(1) is satisfied if the value of AS7 is set as maximum deviation (mm) of the aspheric shape of the object side surface (S41) of the fourth lens (L4) and the spherical shape (SP) connected with the effective diameter position and a central point of the fourth lens (L4), and the value f is set as the focus distance of the whole camera lens (10) system.

Description

technical field [0001] The present invention relates to a compact imaging lens, imaging device, and mobile terminal in which stray light is suppressed. In particular, the present invention relates to an imaging lens, imaging device, and mobile terminal having five lenses and suitable for a low profile. Background technique [0002] In recent years, with the improvement in performance and miniaturization of imaging elements using CCD (Charged Coupled Device) type image sensors or CMOS (Complementary Metal Oxide Semiconductor) type image sensors, etc., mobile phones and mobile phones equipped with imaging devices Information terminals are gradually gaining popularity. Furthermore, recently, under the influence of the increase in size and high definition of the display elements mounted on the above-mentioned mobile information terminals, higher pixels are also being pursued for the imaging elements, and the further improvement of the performance of the imaging lenses mounted on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/18H04N5/225
Inventor 川崎贵志
Owner KONICA MINOLTA INC