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Wide-angle lens

A wide-angle lens and lens technology, which is applied in the field of wide-angle lenses, can solve the problems that wide-angle lenses cannot satisfy wide viewing angles and resist environmental temperature changes at the same time, and achieve the effects of good optical performance, resistance to environmental temperature changes, and large viewing angles

Active Publication Date: 2017-01-04
ETHER OPTRONICS SHENZHEN +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, which has a large viewing angle and is resistant to environmental temperature changes, but still has good Optical performance, lens resolution can also meet the requirements

Method used

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Embodiment Construction

[0033] see figure 1 , figure 1 It is a schematic diagram of the lens configuration and optical path 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 fifth lens L15 from the object side to the image side along the optical axis OA1. Seven lenses L17 and filter OF1. During imaging, the light from the object side is finally imaged on the imaging surface IMA1. The first lens L11 is a convex-concave 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. The second lens L12 is a convex-concave lens with negative refractive power and is made of glass material. The object side S13 is convex, the image side S14 is concave, and bo...

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Abstract

A wide-angle lens provided by the invention comprises in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens is a concave lens with negative refractive power, has a convex surface facing the object side and has a recessed surface facing the image side. The second lens is a concave lens with negative refractive power, has a convex surface facing the object side and has a recessed surface facing the image side. The third lens has positive refractive power and has a convex surface facing the image side. The fourth lens is a biconvex lens and has positive refractive power. The fifth lens has refractive power. The sixth lens has refractive power. The seventh lens is a biconvex lens and has positive refractive power. The fifth lens and the sixth lens satisfy the conditions: -10<f56 / f<-2, wherein the f56 is the combined effective focal length of the fifth lens and the sixth lens, and the f is the effective focal distance of the wide-angle lens.

Description

technical field [0001] The invention relates to a wide-angle lens. Background technique [0002] The development trend of today's automotive lenses and extreme sports photography lenses is to continuously develop towards wide viewing angles. In addition, due to the large changes in the external ambient temperature when the car is used and extreme sports are performed, the automotive lens and extreme sports photography lens must not only have a wide viewing angle, but also be resistant to environmental temperature changes. The existing wide-angle lens is still not perfect, and there is still a lot of room for improvement to meet the needs of wide viewing angle 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, which has a large viewing angle and is resistant to environmental temperature changes, but still has good Excellent opt...

Claims

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Application Information

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IPC IPC(8): G02B13/06G02B13/18
Inventor 施柏源
Owner ETHER OPTRONICS SHENZHEN
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