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Large-relative-aperture 4K all-in-one machine optical zoom lens

An optical zoom and relative aperture technology, applied in optics, optical components, instruments, etc., can solve problems such as the inability to meet the requirements of AI face recognition, the inability to meet the requirements of face recognition pixels, and the limited photosensitive ability of the chip. Long optical length defect, low chief ray incident angle, reduced stroke effect

Active Publication Date: 2019-10-29
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development and maturity of AI face recognition technology, the existing 1080P lens is far from meeting the requirements of AI face recognition. On the one hand, because the resolution is increased to 4K, the resolution of the existing lens is too low for 4K cameras. It cannot meet the pixel requirements of face recognition; on the other hand, due to the small pixel size of the 4K imaging chip and the limited light sensitivity of the chip, the lens needs to have a large relative aperture to obtain sufficient brightness for the image in an environment with limited illumination

Method used

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  • Large-relative-aperture 4K all-in-one machine optical zoom lens

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Embodiment Construction

[0013] like Figure 1~4 As shown, a 4K all-in-one optical zoom lens with a large relative aperture, the optical system of the lens includes a front fixed group with a positive focal power, a variable power group with a negative focal power, and a light The front fixed group bears a certain aperture and corrects the chromatic aberration at the telephoto end to a certain extent; the relay group bears the aberration caused by a large relative aperture The compensation group bears a large aberration such as field curvature, and the zoom group and the compensation group move during the zooming process, which is suitable for AI face recognition and other occasions; the front fixed group includes meniscus negative lenses arranged sequentially from front to back L1 and meniscus positive lens L2 tightly bonded doublet lens, meniscus positive lens L3, the variable power group includes double concave negative lens L4, double concave negative lens L5 and meniscus positive lens L6 arranged...

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Abstract

The invention relates to a large-relative-aperture 4K all-in-one machine optical zoom lens, which comprises a front fixed group, a zoom group, a diaphragm, a relay group and a compensation group; thefront fixed group comprises a doublet lens formed by tightly connecting a meniscus negative lens L1 and a meniscus positive lens L2, and a meniscus positive lens L3; the zoom group comprises a doubletlens formed by tightly connecting a biconcave negative lens L4, a biconcave negative lens L5 and a meniscus positive lens L6; the relay group comprises a triplet lens formed by connecting a biconvexpositive lens L7, a biconcave negative lens L8, a biconvex positive lens L9, a biconcave negative lens L10 and a biconvex positive lens L11 in a sealed manner, and a doublet lens formed by connectinga biconvex positive lens L12 and a biconcave negative lens L13 in a sealed manner; and the compensation group comprises a doublet lens formed by tightly connecting a biconvex positive lens L14, a biconcave negative lens L15 and a biconvex positive lens L16. The lens is compact in structure, can effectively correct chromatic aberration, is higher in resolution, and meets the MTF demands of a 4K-pixel high-resolution imaging chip.

Description

technical field [0001] The invention relates to a large relative aperture 4K all-in-one optical zoom lens. Background technique [0002] With the development and maturity of AI face recognition technology, the existing 1080P lens is far from meeting the requirements of AI face recognition. On the one hand, because the resolution is increased to 4K, the resolution of the existing lens is too low for 4K cameras. It cannot meet the pixel requirements of face recognition; on the other hand, due to the small pixel size of the 4K imaging chip and the limited light sensitivity of the chip, the lens needs to have a large relative aperture to obtain sufficient brightness for the image in an environment with limited illumination . Contents of the invention [0003] In view of this, the object of the present invention is to provide a 4K all-in-one optical zoom lens with a compact structure and high resolution and large relative aperture. [0004] The present invention is realized b...

Claims

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Application Information

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IPC IPC(8): G02B15/16
CPCG02B15/16
Inventor 林孝同江伟张世忠陈春花
Owner FUJIAN FORECAM OPTICS CO LTD
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