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Minisize wide-angle lens

A wide-angle lens, miniature technology, used in optical components, optics, instruments, etc., can solve the problems of complex structure, difficult design, processing, and fixing of free-form prisms, and achieve the effect of light weight, stable processing, and correction of aberrations

Inactive Publication Date: 2009-07-29
ASIA OPTICAL CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the free-form prism structures used in the existing imaging lenses are relatively complex, and it is difficult to design, process, and fix, so there is still a need for further improvement.

Method used

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  • Minisize wide-angle lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0058] Such as image 3 As shown, the second embodiment of the miniature imaging wide-angle lens of the present invention includes a first lens 12 of negative diopter, a free-form surface prism 22 of positive diopter, an aperture stop 52, a second lens 32 of positive diopter, a negative diopter The third lens 72 , a glass plate 62 and an imaging surface 42 , wherein the second lens 32 and the third lens 72 are combined into a cemented lens 82 . The specific values ​​of each component are listed in the table below:

[0059]

Surface serial number

radius of curvature

(mm)

(Radius of

Curvature)

Distance / thickness(mm)

(Distance / Thickness)

Refractive index

(Nd)

Abbe number

(Vd)

S0 ∞ S12 -4.652 1.0 1.5136 57.4 S22 2.199 2.2 S32 4.289 2.5 1.5136 57.4 S42 ∞ -2.5 1.5136 57.4 S52 3.559 -0.6 S62 ∞ -0.563 S72 -3.439 -2.3 1.6204 60.3 ...

Embodiment 3

[0071] Such as Figure 4 As shown, the third embodiment of the miniature imaging wide-angle lens of the present invention includes a first lens 13 of negative diopter, a free-form surface prism 23 of positive diopter, an aperture stop 53, a second lens 33 of positive diopter, a negative diopter The third lens 73 , a glass plate 63 and an imaging surface 43 , wherein the second lens 33 and the third lens 73 are combined into a cemented lens 83 . The specific values ​​of each component are listed in the table below:

[0072]

Surface serial number

radius of curvature

(mm)

(Radius of

Curvature)

Distance / thickness(mm)

(Distance / Thickness)

Refractive index

(Nd)

Abbe number

(Vd)

S0 ∞ S13 -3.897 1.4 1.5136 57.4 S23 2.076 1.8 S33 3.243 2.39 1.5136 57.4 S43 ∞ -2.2 1.5136 57.4 S53 3.16 -0.6 S63 -0.1 S73 -3.92 -2.0 1.6204 60.3 S83...

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Abstract

A miniature imaging wide-angle lens, which can be applied to image capture products, includes a negative diopter first lens, a positive diopter free-form prism, a positive diopter second lens, and A negative diopter third lens, wherein the free-form surface prism and the first lens are arranged side by side, the second lens and the third lens are located below the free-form surface prism and adjacent to the image side. The free-form surface prism is equivalent to adding an aspheric coefficient to the surface of a right-angle prism. Utilizing the lens structure of the present invention can not only shorten the total length, save cost and reduce tolerance, but also obtain better optical quality.

Description

technical field [0001] The invention relates to a miniature imaging lens, in particular to a miniature imaging wide-angle lens with a free-form surface suitable for an image capture device. Background technique [0002] The integration of image capture products and photoelectric technology has become one of the trends in today's technological development. In order to meet the requirements of portability, light, thin, short, and small have become the basic requirements of image capture devices. Regarding the lens form and material selection of the imaging lens, the traditional spherical ground glass lens has more material choices, which is more beneficial for correcting chromatic aberration and has been widely used in the industry. However, when the spherical ground glass lens is used in a situation with a small numerical aperture (FNumber) and a large viewing angle (Wide-angle), it is still difficult to correct aberrations such as spherical aberration and astigmatism. The e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/18G02B1/00
Inventor 廖陈成
Owner ASIA OPTICAL CO INC
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