Wide-angle lens

A wide-angle lens and lens technology, applied in the field of wide-angle lenses, can solve the problems of low image brightness and large F number, and achieve the effect of reducing the F number and improving image brightness and imaging quality.

Active Publication Date: 2017-08-18
HUAQIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a kind of wide-angle lens in order to overcome the defect that the F-number of the wide-angle lens in the prior art is relatively large and cause the image brightness to be low.

Method used

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Examples

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Embodiment Construction

[0070] The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.

[0071] Please combine figure 1 and figure 2 It should be understood that this embodiment provides a wide-angle lens, and the wide-angle lens is arranged coaxially with the first lens 10, the second lens 20, the third lens 30, A diaphragm 60 , a fourth lens 40 , a fifth lens 50 and a filter 70 . The materials of the first lens 10 and the third lens 30 are all glass; the materials of the second lens 20 , the fourth lens 40 and the fifth lens 50 are all plastic.

[0072]The first lens 10 is a spherical mirror, the refractive power of the first lens 10 is negative, and the first lens 10 includes a first spherical surface 11 and a second spherical surface 12 . The second lens 20 is an aspheric mirror, the refractive power of the second lens 20 is negative, and the second lens 20 includes a first aspheric surface 21 and a second...

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Abstract

A wide-angle lens disclosed by the present invention comprises, from the object side to the image side, a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and an optical filter which are arranged orderly and coaxially. The first lens is a spherical mirror, the focal power of the first lens is negative; the second lens is an aspherical mirror, and the focal power of the second lens is negative; the third lens is a spherical mirror, and the focal power of the third lens is positive; the fourth lens is an aspherical mirror, and the focal power of the fourth lens is positive; the fifth lens is a spherical mirror, and the focal power of the fifth lens is negative; and the optical filter comprises a first planar surface and a second planar which are arranged oppositely. By an appropriate optimization structure, the wide-angle lens provided by the present invention enables an F number to be reduced effectively and the image brightness and the imaging quality of a panoramic video shot by the wide-angle lens to be improved, and enables the own weight to be reduced and the unit cost to be optimized by a combination structure of different glass and plastic materials.

Description

technical field [0001] The invention relates to a wide-angle lens. Background technique [0002] The head-mounted display provides panoramic video to the user through the optical system for relevant interaction and operation, bringing people an immersive visual experience. This technology has been widely used in entertainment, medical, education and other fields. With the rapid development of virtual reality technology, more and more high-quality panoramic videos are needed to enrich relevant content. Therefore, a portable panoramic camera for shooting panoramic videos has gained more and more attention. At present, the F-number (the ratio of the focal length of the lens to the clear aperture) of the wide-angle lens of the panoramic camera with a viewing angle greater than 180 degrees is mostly above 2.4, the brightness of the image is low, and most of them are all-glass lenses, and the manufacturing cost is high. Contents of the invention [0003] The technical problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/00G02B1/04
CPCG02B13/0045G02B13/06G02B13/18G02B1/00G02B1/041
Inventor 景磊
Owner HUAQIN TECH CO LTD
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