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Camera lens

A camera lens and lens technology, applied in the field of camera lens, can solve the problems of low height, insufficient, insufficient ratio, etc., and achieve the effect of good optical characteristics

Pending Publication Date: 2021-07-13
CHANGZHOU RAYTECH OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the 2ω of the imaging lens disclosed in the example of Patent Document 1 is narrowed to 46.6° or less, the ratio of TTL at the time of shooting to LB at the time of shooting is not sufficient, and therefore the height at the time of contraction is not sufficiently low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] figure 1 It is a configuration diagram showing the arrangement of the imaging lens LA of the first embodiment at the time of imaging and at the time of retraction. Table 1 shows the curvature radii R of the object side surfaces and the image side surfaces of the first lens L1 to the sixth lens L6 constituting the imaging lens LA of Example 1, the axial thickness of the lenses or the axial distance d between lenses, and the refractive index. nd, Abbe's number νd, Table 2 shows the value of A during photography and contraction, Table 3 shows the conic coefficient k, aspheric coefficient, and Table 4 shows 2ω, FNO, f, f1, f2, f3, f4, f5, f6, TTL, IH.

[0141] 【Table 1】

[0142]

[0143] Reference wavelength = 588nm

[0144] 【Table 2】

[0145] during photography when shrinking A 4.125 0.500

[0146] 【table 3】

[0147]

[0148]

[0149] Among them, k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspherical coeff...

Embodiment 2

[0160] image 3 It is a configuration diagram showing the arrangement of the imaging lens LA of Example 2 at the time of imaging and at the time of retraction. Table 5 shows the curvature radii R of the object side surfaces and the image side surfaces of the first lens L1 to the sixth lens L6 constituting the imaging lens LA of Example 2, the axial thickness of the lenses or the axial distance d between lenses, and the refractive index. nd, Abbe's number νd, Table 6 shows the value of A during photography and contraction, Table 7 shows the conic coefficient k, aspheric coefficient, and Table 8 shows 2ω, FNO, f, f1, f2, f3, f4, f5, f6, TTL, IH.

[0161] 【table 5】

[0162]

[0163]

[0164] Reference wavelength = 588nm

[0165] 【Table 6】

[0166] during photography when shrinking A 4.431 0.500

[0167] 【Table 7】

[0168]

[0169] 【Table 8】

[0170]

[0171]

[0172] As shown in Table 17, Example 2 satisfies relational expressions (1)...

Embodiment 3

[0175] Figure 5 It is a configuration diagram showing the arrangement of the imaging lens LA of Example 3 at the time of imaging and at the time of retraction. Table 9 shows the curvature radii R of the object side surfaces and the image side surfaces of the first lens L1 to the sixth lens L6 constituting the imaging lens LA of Example 3, the axial thickness of the lenses or the axial distance d between lenses, and the refractive index. nd, Abbe's number νd, the values ​​of A during photography and contraction are shown in Table 10, the conic coefficient k and aspheric coefficient are shown in Table 11, and 2ω, FNO, f, f1, f2, f3, f4, f5, f6, TTL, IH.

[0176] 【Table 9】

[0177]

[0178]

[0179] Reference wavelength = 588nm

[0180] 【Table 10】

[0181] during photography when shrinking A 4.247 0.500

[0182] 【Table 11】

[0183]

[0184] 【Table 12】

[0185]

[0186]

[0187] As shown in Table 17, Example 3 satisfies relational exp...

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PUM

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Abstract

The invention relates to the field of optical lenses, and provides a camera lens, which is sequentially provided with a first lens with positive refractive power, a second lens with negative refractive power, a third lens, a fourth lens with positive refractive power, a fifth lens and a sixth lens with negative refractive power from an object side to an image side, the imaging lens satisfies the following relational expressions: (TTL / LB) at the time of imaging is not more than 2.40; 0.20 <= R1 / R2 <= 0.35; 0.02 <= d5 / f <= 0.04; and -0.90 <= f2 / f <= -0.70. The camera lens has a low height during contraction, a narrow angle during imaging, and good optical characteristics.

Description

technical field [0001] The present invention relates to an invention of an imaging lens. In particular, an invention related to an imaging lens suitable for use in camera modules for smartphones and digital cameras using imaging elements such as high-resolution CCDs and CMOSs, etc., which has a full angle of view (hereinafter referred to as 2ω) when taking pictures. ) is a narrow angle of 50° or less, has good optical characteristics, and has a low height when shrunk when TTL / IH is 1.50 or less when shrunk, and is an imaging lens composed of six lenses. Background technique [0002] In imaging lenses, the TTL (total optical length of imaging lenses) becomes longer as the angle of view becomes narrower. Therefore, in recent years, there has been a search for an imaging lens that has a narrow angle of view and has good optical characteristics when taking pictures. , When not taking pictures, the lens barrel is retracted into the camera to shorten the TTL, and the height of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0015G02B13/0045G02B9/62G02B13/02G02B9/64G02B27/0025
Inventor 新田耕二寺岡弘之
Owner CHANGZHOU RAYTECH OPTRONICS CO LTD