Five-piece wide-angle lens module

A wide-angle lens and five-chip technology, applied in the field of camera systems, can solve the problems of close to minus 20 degrees Celsius or lower, and the discount of auxiliary observation functions, so as to achieve the effect of image quality improvement and good image quality

Active Publication Date: 2015-03-25
KINKO OPTICAL
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In many regions with significant climate change, temperatures can approach -20°C or lower in winter and as high as 60°C or higher in summer; image quality, its auxiliary observation function will be greatly reduced

Method used

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  • Five-piece wide-angle lens module
  • Five-piece wide-angle lens module
  • Five-piece wide-angle lens module

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Embodiment Construction

[0047] The structure and effect of the present invention will be described in detail by citing the following embodiments in conjunction with the accompanying drawings.

[0048] like figure 1 As shown, in the first embodiment of the present invention, a five-element wide-angle lens 100 includes a first lens 110, a second lens 120, a third lens 130, a Aperture 140, a fourth eyeglass 150 and a fifth eyeglass 160 are provided with CCD, CMOS or other photosensitive elements (not shown) at the image side B place, and then can be additionally set between the photosensitive element and the fifth eyeglass 160 There are plate lenses 170 such as optical filters and / or protective glasses, and the number of plate lenses 170 can be increased or decreased or not provided according to requirements.

[0049] In the aforementioned five-element wide-angle lens 100 , the first lens element 110 has a negative refractive power, and its object side is convex and its image side is concave, so as to pr...

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Abstract

The invention relates to a five-piece wide-angle lens module including a first lens, a second lens, a third lens, a stop, a fourth lens and a fifth lens, which are sequentially arranged from an object side to an image side. The first lens has a negative refractive power, a convex surface on the object side, and a concave surface on the image side. The second lens has a negative refractive power and two concave surfaces on both sides respectively. The third lens has a positive refractive power. The fourth lens has a positive refractive power and two convex surfaces on both sides respectively. The fifth lens has a negative refractive power. To provide good image quality, the five-piece wide-angle lens module satisfies the following relationships: -0.6<f2 / f3<-0.3, and -0.25<f4 / f5<-0.15.

Description

technical field [0001] The invention relates to a camera system, in particular to a five-chip wide-angle lens. Background technique [0002] In the past, when a car driver is reversing, he usually relies on the rearview mirrors located on both sides of the car body and in front of the cab to observe the road conditions behind him, but the area directly behind the car body will still become the driver's blind spot. In order to enable the driver to observe the road conditions in the blind spot, many vehicles are equipped with a reversing camera system to assist the driver in observing the road conditions behind the car. [0003] In many areas with significant climate change, winter temperatures may approach minus 20 degrees Celsius or lower, while summer temperatures may reach 60 degrees Celsius or higher; If the image quality is too low, its function of assisting observation will be greatly reduced. Contents of the invention [0004] In view of the above problems, the mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/06
CPCG02B9/60G02B13/06G02B13/18G02B13/0045
Inventor 林逸智
Owner KINKO OPTICAL
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