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Minsize pick-up lens

A lens and miniature technology, which is applied in the field of imaging lens, can solve the problems of design, processing and fixing difficulties, and the complex structure of free-form prisms, etc., and achieve the effect of light weight, small size and cost reduction

Active Publication Date: 2009-09-09
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 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0056] Such as Figure 7 As shown, the second embodiment of the miniature imaging 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, and a glass plate 62 and an imaging surface 42. The first lens 12 is a biconcave lens. Both the incident surface S32 and the outgoing surface S52 of the free-form surface prism 22 are convex, and the reflecting surface S42 is a plane. The second lens 32 is a concave-convex lens. The specific values ​​of each component are listed in the table below:

[0057]

Surface serial number Radius of curvature (mm)

(Radius of

Curvature) Distance / thickness(mm)

(Distance / Thickness) Refractive index

(Nd) Abbe number

(Vd) S0 ∞ S12 -6.0 1.05 1.5136 57.4 S22 2.04 1.80 S32 9.184 2.843 1.5136 57.4 S42 ∞ -3.0 1.5136 57.4 S52 2.216 -1.5 S6...

Embodiment 3

[0069] Such as Figure 12 As shown, the third embodiment of the miniature imaging 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, and a glass plate 63 and an imaging surface 43. The first lens 13 is a biconcave lens. Both the incident surface S33 and the outgoing surface S53 of the free-form surface prism 23 are convex, and the reflecting surface S43 is a plane. The second lens 33 is a concave-convex lens. The specific values ​​of each component are listed in the table below:

[0070] Surface serial number Radius of curvature (mm)

(Radius of Curvature) Distance / thickness(mm)

(Distance / Thickness) Refractive index

(Nd) Abbe number

(Vd) S0 ∞ S13 -4.40 1.1 1.5136 57.4 S23 1.90 1.70 S33 3.714 2.463 1.5136 57.4 S43 ∞ -2.643 1.5136 57.4 S53 2.698 -1.448 S63 ...

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Abstract

A miniature imaging lens, which can be applied to image capture products, includes a first lens with negative diopter, a free-form surface prism with positive diopter, and a second lens with positive diopter in sequence from the object side to the image side. The free-form surface prism includes an incident surface, a reflective surface and an outgoing surface, the first lens is arranged on one side of the incident surface, and the second lens is arranged on one side of the outgoing surface. The free-form surface prism is equivalent to adding an aspheric coefficient to the surface of a right-angle prism.

Description

technical field [0001] The invention relates to an imaging lens, in particular to a miniature imaging lens suitable for an image capturing device. Background technique [0002] The integration of image capture devices and photoelectric technology has become the trend of technological development. In order to meet the requirements of portability, light, thin, short, and small have become the basic requirements of image capture devices. In terms of the lens form and selection of the imaging lens, the traditional spherical ground glass lens has more choices and is more beneficial for correcting chromatic aberration, so it has been widely used in the industry. However, when the spherical ground glass lens is used in a situation with a small numerical aperture (F Number) and a large viewing angle (Wide-angle), it is still difficult to correct aberrations such as spherical aberration and astigmatism. The emergence of aspherical lenses solves the above problems. Applying them to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B9/10G02B9/04G02B13/18G02B1/00
Inventor 廖陈成
Owner ASIA OPTICAL CO INC
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