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Continuous zoom lens

A zoom lens, lens technology, applied in focusing devices, focusing devices, focusing devices of cameras, etc., can solve problems such as difficulty in imaging and observation, and achieve the effect of improving the consistency of the optical axis, preventing the loss of the target, and avoiding the jumping of the optical axis

Inactive Publication Date: 2020-06-05
HUBEI HUAZHONG PHOTOELECTRIC SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

TV imaging needs to be applied in different environmental conditions, and strong direct light or reflection will have a certain impact on lens imaging, and it is difficult to image and observe in harsh weather conditions such as smoke, rain, snow, and fog

Method used

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] In an embodiment of the present invention, a continuous zoom lens is provided, such as figure 1 , figure 2 , Figure 6 As shown, it includes a focusing objective lens group 1, a zooming group 2, a compensation group 3, a mirror tube 9, and a three-curved groove zooming tube 10; Provides stable images under ambient conditions. The mirror tube acts as a support and a guide, on which there are three focusing linear grooves 11, three zooming linear grooves 12 and three compensation linear grooves 13, and the inner wall is processed with thread 14 to eliminate stray light, so as to prevent st...

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Abstract

The invention designs a continuous zoom lens. The continuous zoom lens comprises a focusing objective lens group, a zoom group, a compensation group, a lens tube and a three-curve groove zoom tube, wherein the focusing objective lens group realizes fine focusing through forward and backward movement, a focusing linear groove, a zoom linear groove and a compensation linear groove are formed in thelens tube, stray light eliminating threads are machined on the inner wall, and when the zoom group and the compensation group smoothly move in the lens tube, the optical distances of the zoom group and the compensation group are continuously changed; a pin penetrates through the curved groove of the three-curved groove zoom tube, the zoom linear groove of the lens tube and the compensation lineargroove and then is screwed on the zoom group and the compensation group; when the zoom motor group drives the three-curve groove zoom lens tube to rotate, the three-curve groove zoom tube drives the zoom group and the compensation group through the pin to smoothly move in the lens tube according to the positions of the curve grooves to achieve continuous change of the focal length of the zoom lens. The three-curve groove is adopted to push the zoom group and the compensation group to move to realize continuous zoom, so that the optical axis consistency is improved, and stray light can be prevented from being reflected into an imaging view field to influence the imaging quality.

Description

technical field [0001] The invention belongs to the field of lens production, in particular to a continuous zoom lens. Background technique [0002] TV imaging technology is widely used in TV guidance and photoelectric reconnaissance. The continuous zoom lens can clearly image targets of different distances and sizes within a certain range. When it is necessary to search and observe the target, it generally uses a short focus and a large field of view. When observing and tracking the target in detail, it is advisable to use the telephoto and small field of view to track the target. In the process of field of view conversion, high requirements are put forward for the consistency of the optical axis of the lens to prevent the loss of the target. TV imaging needs to be applied in different environmental conditions, and strong direct light or reflection will have a certain impact on lens imaging, and it is difficult to image and observe under harsh weather conditions such as smo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14G03B17/14G03B13/34
CPCG02B15/14G03B17/14G03B13/34
Inventor 陈长鸣韩志刚常大英
Owner HUBEI HUAZHONG PHOTOELECTRIC SCI & TECH
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