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Day and night confocal lens with high pixel number, large aperture and large target surface
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A high-pixel, large-target technology, applied in the field of optical lenses, can solve problems such as increased production costs of optical lenses, and achieve the effect of increased brightness and large photosensitive area
Pending Publication Date: 2019-10-25
杭州图谱光电科技有限公司
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Problems solved by technology
If you need to design a day and night confocal lens with high pixel, large aperture and large target surface, and use the method of switching equal thickness filters to achieve day and night confocal, you will need to use a lot of glass lenses, which will greatly increase the production cost of the optical lens
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Embodiment 1
[0056] Such as figure 1 As shown, the day and night confocal lens with high pixel count, large aperture and large target surface provided by this embodiment includes a first lens, a second lens, a third lens, a fourth lens, Fifth lens, sixth lens, seventh lens, eighth lens, ninth lens and tenth lens.
[0057] Wherein, the first lens is a convex-convex negative power lens, the second lens is a concave-convex negative power lens, the third lens is a double-convex positive power lens, the fourth lens is a plano-convex positive power lens, and the fifth The lens is a double concave negative power lens, the sixth lens is a double convex positive power lens, the seventh lens is a double concave negative power lens, the eighth lens is a double concave negative power lens, and the ninth lens is a double Convex positive refractive power lens, the tenth lens is bi-concave negative refractive power lens.
[0058] Wherein, the fourth lens is cemented with the fifth lens to form a cemen...
Embodiment 2
[0092] For the confocal lens provided in Example 1, the parameters of the confocal lens provided in this embodiment are specifically as follows:
[0093] The focal lengths of the first lens, the second lens, the third lens, the cemented lens one, the sixth lens, the seventh lens, the eighth lens and the cemented lens two satisfy respectively:
[0094] f1=-18.53
[0095] f2=-13.39mm
[0096] f3=9.32
[0097] f e1 =-29.48mm
[0098] f6=14.11mm
[0099] f7=-12.64mm
[0100] f8=10.46mm
[0101] f e2 =103mm
[0102] Among them, f1, f2, f3, f e1 , f6, f7, f8 and f e2are the focal lengths corresponding to the first lens, the second lens, the third lens, the cemented lens 1, the 6th lens, the 7th lens, the 8th lens and the cemented lens 2, respectively.
[0103] Specifically, the parameters of the first lens to the tenth lens are shown in Table 3:
[0104] Table 3 The parameters of the first lens to the tenth lens
[0105]
[0106]
[0107] Wherein, R is the center ...
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Abstract
The invention discloses a day and night confocal lens with a high pixel number, a large aperture and a large target surface. The confocal lens comprises a first lens to a tenth lens and a filter arranged along an optical axis in order from an object side to an image side. The first lens is a convex-concave negative power lens, the second lens is a concave-convex negative power lens, the third lensis a biconvex positive power lens, the fourth lens is a plano-convex positive power lens, the fifth lens is a biconcave negative power lens, the sixth lens is a biconvex positive power lens, the seventh lens is a biconcave negative power lens, the eighth lens is a biconcave negative power lens, the ninth lens is a biconvex positive power lens, and the tenth lens is a biconcave negative power lens. The confocal lens provided by the invention can realize the maximum aperture of F number 1.2 and adapt to a 4K image sensor of 1 / 1.8', and the day and night confocal effect can be achieved by switching an equal-thickness filter.
Description
technical field [0001] The invention belongs to the technical field of optical lenses, in particular to a day and night confocal lens with high pixel number, large aperture and large target surface. Background technique [0002] In the security monitoringsystem, the imaging quality of the optical lens is one of the determining factors for the monitoring system to obtain clear images. The aperture size of the optical lens affects the brightness of the acquired image. The larger the aperture of the optical lens, the better the imaging quality in low light conditions; the image circle diameter of the optical lens determines the size of the image sensortarget surface that the optical lens can adapt to , in the case of the same resolution, an image sensor with a larger target surface has a larger photosensitive area of a single pixel, a stronger photosensitive ability, and a higher imaging brightness. [0003] The confocal effect of optical lenses day and night limits the ap...
Claims
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