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Wide-angle imaging lens group

A lens group, lens technology, applied in optical components, optics, instruments, etc., can solve problems such as large aberration and complex lens design

Active Publication Date: 2016-01-27
NEWMAX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually the picture angle (field of view) of the lens is designed to be 50 degrees to 60 degrees. If the angle exceeds the above design angle, not only the aberration will be large, but the design of the lens will also be more complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0054] Please refer to Figure 1A and Figure 1B ,in Figure 1A A schematic diagram showing a wide-angle imaging lens group according to the first embodiment of the present invention, Figure 1B From left to right are the spherical aberration, astigmatism and distortion curves of the wide-angle imaging lens set of the first embodiment. Depend on Figure 1A It can be seen that the wide-angle imaging lens set sequentially includes a diaphragm 100 , a first lens 110 , a second lens 120 , a third lens 130 , and a fourth lens 140 from the object side to the image side.

[0055] The first lens 110 has positive refractive power and is made of plastic material. Its object-side surface 111 is convex near the optical axis 170, and its image-side surface 112 is convex near the optical axis 170. The object-side surface 111 and the image-side Surfaces 112 are all aspherical.

[0056] The second lens 120 has a negative refractive power and is made of plastic material. Its object-side surf...

no. 3 example

[0089] Please refer to Figure 3A and Figure 3B ,in Figure 3A A schematic diagram showing a wide-angle imaging lens group according to a third embodiment of the present invention, Figure 3B From left to right are the spherical aberration, astigmatism and distortion curves of the wide-angle imaging lens set of the third embodiment. Depend on Figure 3A It can be seen that the wide-angle imaging lens set sequentially includes a diaphragm 300 , a first lens 310 , a second lens 320 , a third lens 330 , and a fourth lens 340 from the object side to the image side.

[0090] The first lens 310 has a positive refractive power and is made of plastic material. Its object-side surface 311 is convex near the optical axis 370, and its image-side surface 312 is convex near the optical axis 370. The object-side surface 311 and the image-side Surfaces 312 are all aspherical.

[0091] The second lens 320 has negative refractive power and is made of plastic material. Its object-side sur...

no. 4 example

[0112] Please refer to Figure 4A and Figure 4B ,in Figure 4A A schematic diagram showing a wide-angle imaging lens group according to a fourth embodiment of the present invention, Figure 4B From left to right are the spherical aberration, astigmatism and distortion curves of the wide-angle imaging lens set of the fourth embodiment. Depend on Figure 4A It can be seen that the wide-angle imaging lens set sequentially includes an aperture 400 , a first lens 410 , a second lens 420 , a third lens 430 , and a fourth lens 440 from the object side to the image side.

[0113] The first lens 410 has positive refractive power and is made of plastic material. Its object-side surface 411 is convex near the optical axis 470, and its image-side surface 412 is convex near the optical axis 470. The object-side surface 411 and the image-side Surfaces 412 are all aspherical.

[0114] The second lens 420 has a negative refractive power and is made of plastic material. Its object-side s...

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PUM

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Abstract

The invention discloses a wide-angle imaging lens group, which sequentially comprises an aperture, a first lens, a second lens, a third lens and a fourth lens from the object side to the image side, and is characterized in that the first lens has positive refraction power, the image side surface of the first lens is a convex surface, and at least one of the object side surface and the image side surface of first lens is an aspheric surface; the second lens has negative refraction power, the image side surface of the second lens is a concave surface, and at least one of the object side surface and the image side surface of the second lens is an aspheric surface; the third lens has positive refraction power, the object side surface of the third lens is a concave surface, and at least one of the object side surface and the image side surface of the third lens is an aspheric surface; and the fourth lens has negative refraction power, the object side surface of the fourth lens is a convex surface, at least one of the object side surface and the image side surface of the fourth lens is an aspheric surface, and at least one of the object side surface and the image side surface of the fourth lens is provided with an inflection point. Therefore, the purposes of improving the field angle and reducing the aberration are achieved.

Description

technical field [0001] The invention relates to an imaging lens set, in particular to a miniaturized wide-angle imaging lens set. Background technique [0002] With the rise of electronic products with photographic functions, the demand for optical systems is increasing day by day. During shooting, in order to obtain a wider shooting range, the angle of view of the lens needs to meet certain requirements. Usually the picture angle (field of view) of the lens is designed to be 50 degrees to 60 degrees. If the angle exceeds the above design angle, not only the aberration will be large, but the design of the lens will also be more complicated. [0003] Therefore, there is a need for a miniaturized wide-angle imaging lens group. In addition to being configured in electronic products such as lenses used in digital cameras, lenses used in network cameras, or mobile phone lenses, it also has a larger viewing angle and reduces aberrations. to reduce the complexity of lens design. ...

Claims

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Application Information

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IPC IPC(8): G02B13/18G02B13/06
Inventor 赖淑姿柯贤敕
Owner NEWMAX TECH
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