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Zoom lens

一种变焦镜头、镜筒的技术，应用在变焦镜头领域，能够解决变焦镜头总体直径大、不利变焦镜头小型化等问题，达到简化制造工艺、节省原材料、降低成本的效果

Inactive Publication Date: 2012-12-26
FOSHAN PREMIER SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the existing zoom lens, the structure of setting the guide cylinder outside a group of moving cylinders has caused the overall diameter of the zoom lens to be large, which is not conducive to the miniaturization of the zoom lens.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Please refer to Figure 1 to Figure 3 , A zoom lens 100 provided by a preferred embodiment of the present invention. The zoom lens 100 includes a fixed barrel 30, a cam barrel 40, a guide barrel 50, a first lens group 60, a second lens group 70, a third lens group 80 and a frame 90. The guide tube 50 is disposed in the fixed tube 30, and the cam tube 40 is accommodated in the fixed tube 30 and can be rotated and moved along the optical axis direction of the zoom lens 100 in the fixed tube 30. The guide tube 50 can move along the optical axis direction of the zoom lens 100 with the rotation of the cam tube 40. The first lens group 60 and the second lens group 70 are sequentially arranged in the guide tube 50 and the cam tube 40 and can move along the optical axis direction of the zoom lens 100 with the rotation of the cam tube 40 mobile. The third lens group 80 is moved in the fixed barrel 30 along the optical axis direction of the zoom lens 100 by a driver.

[0017] In...

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Abstract

The invention relates to a zoom lens which comprises a fixed cylinder, a cam cylinder, a guide cylinder, a first lens group, a second lens group and a third lens group. The guide cylinder is arranged in the fixed cylinder. The cam cylinder is accommodated in the fixed cylinder and rotationally moves in the fixed cylinder along the optical axis direction of the zoom lens. The guide cylinder moves with the rotational movement of the cam cylinder along the optical axis direction of the zoom lens. The first lens group and the second lens group are sequentially arranged in the guide cylinder and the cam cylinder and both move with the rotational movement of the cam cylinder along the optical axis direction of the zoom lens. The third lens group is arranged in the fixed cylinder and is driven by a driver to move along the optical axis direction of the zoom lens. According to the zoom lens, one fixed cylinder, one cam cylinder and one guide cylinder are matched with a plurality of lens groups, so that the zooming function can be implemented, and thus, the structure of the zoom lens is simplified and the integral size of the zoom lens is also reduced.

Description

Technical field [0001] The invention relates to a zoom lens. Background technique [0002] At present, a retractable zoom lens includes at least a group of moving barrels, a two-group moving barrel, and a guide barrel. The group of moving barrels and the two groups of moving barrels are usually assembled in the guide barrel, and the group of moving barrels is closest to the object. A group of moving barrels usually includes the lens with the largest diameter in the zoom lens, which is usually set at the position of the zoom lens closest to the subject. After the optical system design of the zoom lens is completed, due to factors such as the maximum luminous flux and light intensity have been determined, the diameter of the lens with the largest diameter in a group of moving barrels is generally fixed. Therefore, in the existing zoom lens, the structure of setting the guide tube outside a group of moving tubes results in a larger overall diameter of the zoom lens, which is not c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/10
CPCG02B15/14G02B7/10G02B7/102G02B15/143
Inventor 康笑天李俊杰李梓原张建军
Owner FOSHAN PREMIER SCI & TECH CO LTD
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