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Optical lens set

a technology of optical lens and lens set, applied in the field of optical imaging lens set, to achieve the effects of reducing air gaps, low flare, and shortening total length

Active Publication Date: 2018-05-03
GENIUS ELECTRONICS OPTICAL XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]In light of the above, the present invention proposes an optical imaging lens set of six lens elements which is shorter in total length, technically possible, has reduced air gaps, has low flare and has good optical performance. The optical imaging lens set of six lens elements of the present invention from an object side toward an image side in order along an optical axis has a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each lens element respectively has an object-side surface which faces toward an object side as well as an image-side surface which faces toward an image side.
[0007]The present invention in a second aspect proposes another optical imaging lens set of six lens elements which is shorter in total length, technically possible, has reduced air gaps, has low flare and has good optical performance. The optical imaging lens set of six lens elements from an object side toward an image side in order along an optical axis has a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each lens element respectively has an object-side surface facing toward an object side as well as an image-side surface facing toward an image side.

Problems solved by technology

In addition, in order to correct the spherical aberration and the chromatic aberration which are caused by the first two lens elements, there are various injection molding problems, such as smaller thickness of the third lens element and the fourth lens element or heavily crooked periphery curves of the third lens element and the fourth lens element.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

first example

[0104]Please refer to FIG. 6 which illustrates the first example of the optical imaging lens set 1 of the present invention. Please refer to FIG. 7A for the longitudinal spherical aberration on the image plane 71 of the first example; please refer to FIG. 7B for the astigmatic field aberration on the sagittal direction; please refer to FIG. 7C for the astigmatic field aberration on the tangential direction, and please refer to FIG. 7D for the distortion aberration. The Y axis of the spherical aberration in each example is “field of view” for 1.0. The Y axis of the astigmatic field and the distortion in each example stands for “image height”, which is 3.528 mm.

[0105]The optical imaging lens set 1 of the first example has six lens elements 10 to 60 with refractive power. The optical imaging lens set 1 also has a filter 70, an aperture stop 80, and an image plane 71. The aperture stop 80 is provided between the object side 2 and the first lens element 10. The filter 70 may be used for ...

second example

[0114]Please refer to FIG. 8 which illustrates the second example of the optical imaging lens set 1 of the present invention. It is noted that from the second example to the following examples, in order to simplify the figures, only the components different from what the first example has, and the basic lens elements will be labeled in figures. Other components that are the same as what the first example has, such as the object-side surface, the image-side surface, the part in a vicinity of the optical axis and the part in a vicinity of its circular periphery will be omitted in the following examples. Please refer to FIG. 9A for the longitudinal spherical aberration on the image plane 71 of the second example, please refer to FIG. 9B for the astigmatic aberration on the sagittal direction, please refer to FIG. 9C for the astigmatic aberration on the tangential direction, and please refer to FIG. 9D for the distortion aberration. The components in the second example are similar to th...

third example

[0116]Please refer to FIG. 10 which illustrates the third example of the optical imaging lens set 1 of the present invention. Please refer to FIG. 11A for the longitudinal spherical aberration on the image plane 71 of the third example; please refer to FIG. 11B for the astigmatic aberration on the sagittal direction; please refer to FIG. 11C for the astigmatic aberration on the tangential direction, and please refer to FIG. 11D for the distortion aberration. The components in the third example are similar to those in the first example, but the optical data such as the curvature radius, the refractive power, the lens thickness, the lens focal length, the aspheric surface or the back focal length in this example are different from the optical data in the first example, and in this example, the object-side surface 31 of the third lens element 30 facing toward the object side 2 has a convex part 33′ in the vicinity of the optical axis and the object-side surface 61 of the sixth lens ele...

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Abstract

An optical-lens-set includes a first lens element of positive refractive power, a second lens element of an image surface with a concave portion near the optical-axis, no air gap between a third lens element and a fourth lens element, at least one of an object surface and an image surface of a fifth lens element being aspherical, both an object surface and an image surface of a sixth lens element being aspherical so that the total thickness ALT of all six lens element, the distance TL from an object surface of the first lens element to the image surface of the sixth lens element and total five air gaps AAG satisfy ALT / AAG≤4.5 or TL / AAG≤5.5.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority from Chinese patent application No. 201610948407.6, filed on Nov. 2, 2016. The contents of which are hereby incorporated by reference in their entirety for all purposes.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present invention generally relates to an optical imaging lens set. Specifically speaking, the present invention is directed to an optical imaging lens set for use in portable electronic devices such as mobile phones, cameras, tablet personal computers, or personal digital assistants (PDA) for taking pictures and for recording videos.2. Description of the Prior Art[0003]The specifications of portable electronic devices change all the time and the key element—optical imaging lens set develops variously so a good imaging quality is needed as well as a larger aperture stop and wider view angles. As far as the increase of view angles and aperture stop are concerned, flare usually happ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02B13/00G02B5/00G02B27/00G02B9/62
CPCG02B13/0045G02B9/62G02B27/0025G02B5/005G02B13/006
Inventor GONG, JINHUILIN, HAILIAO, HUABIN
Owner GENIUS ELECTRONICS OPTICAL XIAMEN
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