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Camera lens group

A camera lens and camera lens technology, applied in the field of camera lens sets, can solve the problems of low infrared transmittance, difficult to improve optical distortion, and inability to meet imaging requirements in the near-infrared band, and achieve high imaging quality and high light transmission. rate effect

Pending Publication Date: 2018-12-18
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most near-infrared lenses use spherical lenses, making it difficult to improve their optical distortion
At the same time, the current near-infrared lens is also susceptible to interference from non-near-infrared band light such as visible light when working in a bright environment, or has the disadvantage of low infrared transmittance, which cannot meet the imaging requirements of the near-infrared band

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Refer to the following Figure 1 to Figure 2C An imaging lens group according to Embodiment 1 of the present application will be described. figure 1 A schematic structural diagram of the camera lens group according to Embodiment 1 of the present application is shown.

[0068] Such as figure 1 As shown, the imaging lens group according to the exemplary embodiment of the present application includes in sequence along the optical axis from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 , the fifth lens E5, the filter E6 and the imaging surface S13.

[0069] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is concave, and its image side S6 is convex. ...

Embodiment 2

[0096] Refer to the following Figure 3 to Figure 4C An imaging lens group according to Embodiment 2 of the present application will be described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. image 3 A schematic structural diagram of the camera lens group according to Embodiment 2 of the present application is shown.

[0097] Such as image 3 As shown, the imaging lens group according to the exemplary embodiment of the present application includes in sequence along the optical axis from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 , the fifth lens E5, the filter E6 and the imaging surface S13.

[0098] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its im...

Embodiment 3

[0112] Refer to the following Figure 5 to Figure 6C An imaging lens group according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of a camera lens group according to Embodiment 3 of the present application is shown.

[0113] Such as Figure 5As shown, the imaging lens group according to the exemplary embodiment of the present application includes in sequence along the optical axis from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, and a fourth lens E4 , the fifth lens E5, the filter E6 and the imaging surface S13.

[0114] The first lens E1 has positive refractive power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has positive refractive power, its object side S5 is concave, and its image side S6 is convex. The fo...

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Abstract

The application discloses a camera lens group. The lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence from an object side to an image side alongan optical axis, wherein the first lens has a positive focus; the object side of the first lens is a convex side; the image side of the first lens is a concave side; the second lens has a negative focus; object side of the second lens is a convex side; the image side of the second lens is a concave side; the third lens has a positive focus; the fourth lens has a positive focus; the fifth lens hasa negative focus; the object side of the fifth lens is a convex side; the image side of the fifth lens is a concave side; and the wavelength lambdan corresponding to 50 percent of the transmission rate of the camera lens group satisfies that (lambdan-700) (lambdan-800) is less than or equal to 0.

Description

technical field [0001] The present application relates to a camera lens group, and more specifically, the present application relates to a camera lens group including five lenses, which can be applied to near-infrared scenes. Background technique [0002] An infrared camera lens refers to a device that receives infrared light reflected by a subject through a photosensitive chip to form an image. At present, infrared lenses have been gradually applied in several infrared application scenarios such as day and night monitoring, fog penetration shooting, and laser night vision. Infrared camera lenses can be divided into near-infrared lenses and far-infrared lenses according to the different wavelength ranges they target. [0003] At present, most near-infrared lenses use spherical lenses, making it difficult to improve their optical distortion. At the same time, the current near-infrared lens is also susceptible to interference from non-near-infrared light such as visible ligh...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/14G02B13/18
CPCG02B13/0045G02B13/14G02B13/18
Inventor 闻人建科
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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