Zoom lens

A zoom lens and optical zoom technology, applied in the field of zoom lenses, can solve the problems of incompatibility between infrared performance and high and low temperature performance, large image area and small volume, and inability to meet the requirements of image brightness, etc., to achieve excellent confocal imaging Reasonable distribution of power, lens quantity and volume, and balanced overall quality

Pending Publication Date: 2020-09-29
舜宇光学(中山)有限公司
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AI Technical Summary

Problems solved by technology

However, the currently used lenses generally have the following shortcomings: small aperture, which cannot meet the brightness requirements of images in low-light environments; large image area and small size cannot be balanced, and cannot meet the space requirements of the lens; low resolution, the current mainstream 1080P lens , with a resolution of 2 million, it is obviously unable to meet th

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Embodiment Construction

[0041] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that are used in the embodiments. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.

[0042] When describing the embodiments of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", " The orientation or positional relationship expressed by "horizontal", "top", "bottom", "inner" and "outer" is based on the orientation or positional relationship shown in the relevant drawings, which are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particu...

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Abstract

The invention relates to a zoom lens, which comprises a first fixed group (1), a zoom group (2), a second fixed group (3), a focusing group (4) and an optical filter (5) which are sequentially arranged from an object side to an image side along an optical axis, wherein the zoom group (2) can move along the optical axis and is used for optical zoom of the zoom lens between a wide-angle end and a telescopic end, the focusing group (4) can move along the optical axis and is used for correcting the image plane position change of the zooming group (2) in the zooming process, and the focal length FAof the first fixed group (1), the focal length FB of the zoom group (2), the focal length FC of the second fixed group (3) and the focal length FD of the focusing group (4) meet the following conditions that FA/FC is more than or equal to 1.45 and less than or equal to 3.25, FB/FC is more than or equal to -2.3 and less than or equal to -0.45, and FD/FC is more than or equal to 1.10 and less thanor equal to 3.45. According to the invention, the lens is small in size and large in image surface, and can meet the use requirements of various types of camera equipment.

Description

technical field [0001] The invention relates to the technical field of optical system and device design, in particular to a zoom lens. Background technique [0002] With the development of AI face recognition technology, the zoom lens is beneficial to further development and application space in this field. However, in the field of AI face recognition, clearer images are needed to achieve its excellent recognition accuracy and processing efficiency. Therefore, higher requirements are put forward for the aperture, image plane, resolution, infrared performance and high and low temperature performance of the camera lens. However, the currently used lenses generally have the following shortcomings: small aperture, which cannot meet the brightness requirements of images in low-light environments; large image area and small size cannot be balanced, and cannot meet the space requirements of the lens; low resolution, the current mainstream 1080P lens , with a resolution of 2 milli...

Claims

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Application Information

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IPC IPC(8): G02B15/177
CPCG02B15/177
Inventor 徐奉刚邹文镔白兴安陈汇东
Owner 舜宇光学(中山)有限公司
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