Zoom optical system applied to monitoring

Abstract

The invention provides a high and low-temperature, infrared confocal and ultra-high-definition zoom optical system applied to monitoring. The zoom optical system comprises a first lens set, a second lens set, a diaphragm, a third lens set, a fourth lens set, a fifth lens set, a light filter and a light-sensitive chip, wherein the second lens set and the fourth lens set are capable of moving forwards and backwards along an object image direction; the third lens set comprises a seventh lens, a ninth lens and a tenth lens which are successively arranged from an object surface to an image surface;the fifth lens set comprises a twelfth lens and a fourteenth lens which are successively arranged from the object surface to the image surface; and the seventh lens, the ninth lens, the tenth lens, the twelfth lens and the fourteenth lens adopt plastic aspherical lenses. According to the zoom optical system, the lens layout is reasonably considered; most of the lenses adopt plastic aspherical lenses, so that the cost is greatly reduced.

Description

[0001] 【Technical field】 [0002] The invention relates to an optical imaging system, especially a variable focus optical system for monitoring. [0003] 【Background technique】 [0004] At present, the zoom optical system used for monitoring generally has such shortcomings: the system has low definition, high cost, and cannot guarantee the complete confocal of each focal length infrared in the process of zooming, etc. At present, there are no lenses that fully take into account the above characteristics in the market. There are only a few lenses that improve certain aspects at the expense of other aspects. For example, in order to achieve ultra-high definition and infrared confocal, the system cost must be increased. Such a method is far from meeting the requirements of monitoring ultra-high pixels and pursuing the highest cost performance. [0005] 【Content of invention】 [0006] The technical problem to be solved by the present invention is to provide a variable focus optic...

AI Technical Summary

Problems solved by technology

[0004] At present, the zoom optical system for monitoring generally has such shortcomings: the system has low definition, high cost, and cannot guarantee the complete confocal of each focal length infrared during the zooming process, etc.

This method is far from meeting the requirements of monitoring ultra-high pixels and pursuing the highest cost performance

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