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Medium wave infrared continuous zooming optical system with high zoom ratio

An optical system and zoom ratio technology, applied in the field of optical lenses, can solve the problems of large F number, long zoom stroke, and many lenses, and achieve the effect of small F number, short zoom stroke, and few lenses

Active Publication Date: 2013-11-13
长春长光睿视光电技术有限责任公司
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a mid-wave infrared continuous zoom optical system with a high zoom ratio to solve the problems of long zoom stroke, large F number and many lenses in the prior art

Method used

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  • Medium wave infrared continuous zooming optical system with high zoom ratio
  • Medium wave infrared continuous zooming optical system with high zoom ratio
  • Medium wave infrared continuous zooming optical system with high zoom ratio

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Embodiment Construction

[0020] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] See attached figure 1 , a mid-wave infrared continuous zoom optical system with a high zoom ratio of the present invention includes a front fixed group 1, a lens A2-a of the variable power group 2, and a lens C3-a of the compensation group 3 coaxially arranged in sequence from left to right a. Lens B2-b of zoom group 2, lens D3-b of compensation group 3, rear fixed group 4, secondary imaging group 5 and detector 6; figure 2 , image 3 , Figure 4 Shown is a schematic diagram of the optical structure of the mid-wave infrared continuous zoom optical system at focal lengths of 300mm, 67.2mm, and 10mm, the lens A2-a and lens B2-b of the zoom group 2 and the lens C3-a of the compensation group 3 and lens D3-b coaxially intersecting, the axial movement of the variable power group 2 and the compensation group 3 realizes the continuous zooming of the ...

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Abstract

The invention relates to a medium wave infrared continuous zooming optical system with high zoom ratio, belongs to the technical field of optic lens, and aims to solve the existent problems of long zooming stroke, large F value and more lens in the prior art. The system comprises a front fixing group, a lens A of a time changing group, a lens C of a compensation group, a lens B of the time changing group, a lens D of the compensation group, a back fixing group, a secondary image formation group and a probe, coaxially arranged from left to right in sequence, wherein the continuous zooming of the system is realized through the axial movement of the time changing group and the compensation group. Through adopting the structure that the lens A and the lens B of the time changing group and the lens C and the lens D of the compensation group are arranged in a crossing manner to move, the continuous zooming is realized, the zooming stroke is short, the curve is smooth, 100% cold light stop efficiency is satisfied, the F value is constant to be 2, the continuous zooming can be carried out within the range of 10 mm to 300 mm of focal distance, and the image formation quality is sound in the whole focal distance range.

Description

technical field [0001] The invention belongs to the technical field of optical lenses, and in particular relates to a mid-wave infrared continuous zoom optical system with a high zoom ratio. Background technique [0002] Infrared imaging technology has many advantages and is widely used in many fields. The infrared zoom system is divided into two forms: multi-level zoom and continuous zoom. The infrared multi-level zoom system has discontinuous imaging due to the intermittent zoom process when the field of view changes. The problem. [0003] The Chinese patent with the publication number CN102608734 discloses a technical solution called a mid-wave infrared 30 times continuous zoom optical system without a rear fixed group. The optical system includes a zoom objective lens and a relay lens group. Group mechanical compensation zoom principle, secondary imaging technology, to achieve 30 times continuous zoom, but because the system adopts the traditional two-component zoom met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/163
Inventor 周昊刘英孙强李淳
Owner 长春长光睿视光电技术有限责任公司
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