Zoom lens structure capable of ensuring optical axis consistency

A zoom lens, consistent technology, applied in optics, optical components, installation, etc., can solve problems such as large errors, optical axis offset, and image quality degradation, and achieve the effects of reducing errors, improving precision, and smooth movement

Pending Publication Date: 2022-03-15
HEBEI HANGUANG HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the traditional zoom lens structure, the focusing and zooming systems are irrelevant to each other, and the error caused by assembly is extremely large. The mo

Method used

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  • Zoom lens structure capable of ensuring optical axis consistency
  • Zoom lens structure capable of ensuring optical axis consistency
  • Zoom lens structure capable of ensuring optical axis consistency

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Embodiment Construction

[0028] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] Such as figure 1 As shown, a zoom lens structure that ensures optical axis consistency includes a front cam 1, a rear cam 2, a lens barrel 3, a front group 4, a zoom group 5, a compensation group 6, and a rear group 7. The lens barrel 3 is slidably matched with the guide surfaces of the front group 4, the zoom group 5, the compensation group 6, and the rear group 7.

[0030] Such as figure 2 As shown, two guide nails 9 are fixed on the same diameter on the outer circumferential surface of the front group 4; the front group 4 is installed inside the lens barrel 3, and the front cam 1 is set outside the lens barrel 3; Figure 5 As shown, the front cam 1 has a set of focusing curve grooves for controlling the focus of the front group 4; the position of the lens barrel 3 corresponding to the focus curve grooves is also provided with a through guide g...

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Abstract

According to the zoom lens structure and the zoom lens capable of guaranteeing the optical axis consistency, a traditional structure is changed, focusing and zooming are completed in the same lens barrel, errors caused by assembling and adjusting all lens sets are reduced, the precision of focusing and zooming in the movement process is effectively improved, the optical axis consistency is good, and the zoom lens structure is high in practicability. The imaging quality of the zoom lens is improved; the rear cam is provided with two zoom curve grooves, the structure has high rigidity, and the deformation influence caused in the machining process can be well resisted; correspondingly, two guide nails drive the zoom group and the compensation group to move, so that the zoom group and the compensation group are uniformly stressed, relatively stable in movement and high in imaging quality; the system is simple in structure, small in size, light in weight, low in cost, high in precision, convenient to assemble, good in reliability, high in environmental adaptability, good in optical axis consistency and high in imaging quality, and the scheme of the system has high guiding significance on research of a zoom structure form.

Description

technical field [0001] The invention belongs to the technical field of optical-mechanical structures, and in particular relates to a zoom lens structure for ensuring optical axis consistency. Background technique [0002] The zoom lens refers to the change of the focal length of the optical system through the change of the position of the optical parts inside the lens, so as to obtain a continuous and uninterrupted zoom optical system. For a continuous zoom lens, whether it has good imaging quality during the switching process between large field of view and small field of view, and the ability of the lens to respond to environmental changes all reflect its quality. Therefore, the zoom structure of the zoom lens is very important for the lens. [0003] However, in the traditional zoom lens structure, the focusing and zooming systems are irrelevant to each other, and the error caused by assembly is extremely large. The movement of each lens group will have different degrees ...

Claims

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Application Information

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IPC IPC(8): G02B7/10G02B15/14G02B15/15
CPCG02B7/10G02B15/144G02B15/15
Inventor 高则超孟凡强井世丽刘斌李晓雷周立媛
Owner HEBEI HANGUANG HEAVY IND
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