High definition underwater video shooting lens

A camera lens and video technology, applied in the field of optical lenses, can solve the problem of increasing the number of pieces, and achieve the effects of improved imaging quality, convenient maintenance, and simple optical structure

Active Publication Date: 2017-09-15
FUDING YIXIONG OPTICS APP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this structure is that the number of chips increases

Method used

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  • High definition underwater video shooting lens
  • High definition underwater video shooting lens
  • High definition underwater video shooting lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Table 1 is image 3 The optical structure data of the lens device of the present invention shown. R 1 , R 2 ‥‥R 12 , R 13 is the radius of each face of the lens; d 1 、d 2 ‥‥d 12 、d 13 are the thickness of each lens or the air space between them, respectively. Its actual focal length f'=5.765mm, relative aperture D / f'=1:2, field of view 2ω=60° (image size Φ8mm), object distance L1 is 25m, total optical length Totr=41.5mm, the designed spectrum The center is set at the green light (e light), and the weights of the e, F, d, c, g spectral lines are 1, 1, 0.8, 0.3, 0.4. The units of radius R and thickness d are mm.

[0070] Figure 5 It is the main geometric aberration curve diagram of Embodiment 1 of the lens device of the present invention. Among them: the MTF curve diagram is the MTF curve of each field of view of 0ω, 0.5ω, 0.7ω, 1ω, the unit of the abscissa is line pair / mm; the unit of the abscissa of the spherical aberration and astigmatism is mm; the abscis...

Embodiment 2

[0074] The difference between embodiment 2 and embodiment 1 is: as Figure 5 As shown, on the basis of embodiment 1, embodiment 2 adds a front plate glass 8, and is filled with pure water between the first lens 1 and the front plate glass 8.

[0075] Table 2 is the optical structure data of Example 2. R 1’ , R 2’ , R 1 , R 2 ‥‥R 12 , R 13 is the radius of each face of the lens; d 1’ 、d 2’ 、d 1 、d 2 ‥‥d 12 、d 13 are the thickness of each lens or the air space between them, respectively. Its actual focal length f'=5.78mm, relative aperture D / f'=1:2, field angle 2ω=60° (image size Φ8mm), object distance L1 is 25m, total optical length Totr=49.49mm, e, F The weights of the spectral lines of , d, c, and g are 1, 1, 0.8, 0.3, 0.4. The units of radius R and thickness d are mm.

[0076] Figure 6 It is the MTF curve of each field of view of 0ω, 0.5ω, 0.7ω, and 1ω in Embodiment 2 of the lens device of the present invention. The unit of the abscissa of the MTF graph is ...

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Abstract

The invention relates to a high definition underwater video shooting lens. The lens comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens is a convex-concave negative lens. The second lens is a convex-concave positive lens. The third lens is a double-concave negative lens. The fourth lens is a concave-convex positive lens. The fifth lens is a convex-concave positive lens. The sixth lens is flat plat protection glass. According to the invention, by allowing the entrance pupil position of the whole optical system to be coincident with the sphere center of the first face of the first lens, it is ensured that light beams enter the water space without deflection, so the lens is capable of being suitable for different water depths, the high definition effect can be achieved at different water depths and the lens is simple in optical structure and the high in cost effectiveness.

Description

technical field [0001] The invention relates to the field of optical lenses, in particular to a high-definition underwater video camera lens. Background technique [0002] With the technological breakthrough of underwater video photography, especially the breakthrough of high-sensitivity, high-definition imaging devices and high-brightness lighting systems suitable for underwater photography, human beings can see clearer, farther, The activities of underwater scenery with deeper water bottom and longer observation time have promoted human beings' greater interest in exploring underwater fields such as oceans, rivers and lakes. New underwater industries, underwater security, underwater scientific research, exploration and development of underwater resources, and underwater entertainment are rapidly emerging. [0003] Different from the atmospheric environment on land, its object-space space propagation medium is water or sea water with a refractive index of 1.334 and 1.34316...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G03B17/08
CPCG02B13/0015G03B17/08Y02A90/30
Inventor 王亮亮赖英辉赖爱光王亦雄
Owner FUDING YIXIONG OPTICS APP
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