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Wide-angle lens

A wide-angle lens and lens technology, applied in the field of wide-angle lenses, can solve the problem that wide-angle lenses cannot have large aperture and resistance to environmental temperature changes at the same time, and achieve the effects of good optical performance, resistance to environmental temperature changes, and short overall length.

Active Publication Date: 2018-01-12
SINTAI OPTICAL SHENZHEN CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a wide-angle lens with a short total length, a larger viewing angle and a smaller aperture value in view of the defect that the wide-angle lens in the prior art cannot simultaneously have a large aperture and the ability to resist changes in ambient temperature , resistant to environmental temperature changes, but still has good optical properties

Method used

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Embodiment Construction

[0033] see figure 1 , figure 1 is a schematic diagram of the lens configuration of the first embodiment of the wide-angle lens according to the present invention. The wide-angle lens 1 sequentially includes a first lens L11, a second lens L12, a third lens L13, a diaphragm ST1, a fourth lens L14, a fifth lens L15, a sixth lens L16 and a filter from the object side to the image side along the optical axis OA1. Light sheet OF1. During imaging, the light from the object side is finally imaged on the imaging surface IMA1.

[0034] The first lens L11 is a crescent lens with negative refractive power and is made of glass material. The object side S11 is convex, the image side S12 is concave, and both the object side S11 and the image side S12 are spherical surfaces.

[0035] The second lens L12 is a crescent lens with negative refractive power and is made of plastic material. The object side S13 is convex, the image side S14 is concave, and both the object side S13 and the image ...

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Abstract

A wide-angle lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in order from the object side to the image side along an optical axis. The first lens is a crescent lens with negative refractive power, and the convex surface of the first lens faces the object side, and the concave surface faces the image side. The second lens is a crescent lens with a negative refractive power, and the convex surface of the second lens faces the object side, and the concave surface faces the image side. The third lens and the sixth lens are bi-convex lens having a positive refractive power, and the fourth lens has a positive refractive power. The fifth lens is a biconcave lens having negative refractive power. The wide-angle lens satisfies the following condition of 2<=theta m / TTL<=2.5, wherein the theta m is the maximum half visual angle of the wide-angle lens, the unit of the maximum half visual angle is degrees, and the TTL is the distance from theobject-side surface of the first lens to the image plane on the optical axis, the unit of the distance in mm.

Description

technical field [0001] The invention relates to a wide-angle lens. Background technique [0002] The development trend of today's wide-angle lenses, in addition to the continuous development towards miniaturization and wide-angle viewing, with different application requirements, it is also necessary to have a large aperture and the ability to resist changes in ambient temperature. Known wide-angle lenses can no longer meet today's needs. , another wide-angle lens with a new structure is needed to meet the needs of miniaturization, wide viewing angle, large aperture and resistance to environmental temperature changes at the same time. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a wide-angle lens with a short total length, a larger viewing angle and a smaller aperture value in view of the defect that the wide-angle lens in the prior art cannot simultaneously have a large aperture and the ability to resist chang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
Inventor 邱伟庭
Owner SINTAI OPTICAL SHENZHEN CO LTD
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