Double-group linkage infrared continuous zooming optical system

An optical system and infrared technology, applied in optics, optical components, instruments, etc., can solve problems such as difficult to achieve large zoom ratio, and achieve the effect of reducing the number of system lenses and simple system structure

Active Publication Date: 2016-06-15
凯迈(洛阳)测控有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-group linkage infrared continuous zoom optical system to solve the problem that the existing optical system is difficult to achieve a large zoom ratio

Method used

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  • Double-group linkage infrared continuous zooming optical system
  • Double-group linkage infrared continuous zooming optical system
  • Double-group linkage infrared continuous zooming optical system

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] Such as figure 1 As shown, the dual-group linkage infrared continuous zoom optical system includes a front fixed group, a first zoom group, a compensation group, a second zoom group, and a rear fixed group that are sequentially arranged from the object space to the image side along the optical axis, wherein the front The fixed group is the front fixed lens A, the first zoom group is the zoom lens B-1, the compensation group is the compensation lens C, and the second zoom group is the zoom lens B-2. Such as figure 2 As shown, when zooming, the zoom lens B-1 and the zoom lens B-2 make axial linear motions in the same direction and at the same speed on the optical axis to realize the change of the focal length of the system; the compensation lens C is on the optical axis Make axial non-linear movement in the relative direction to compensate for the dis...

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Abstract

The invention relates to a double-group linkage infrared continuous zooming optical system, the system comprises a front fixed group, a first zooming group, compensation groups, a second zooming group and a rear fixed group which are arranged from object space to image space along optical axis in sequence, the first zooming group and the second zooming group make axial directional linear movement on an optical axis with the same direction and same speed, and the compensation groups make axial directional non-linear movement in the opposition direction on the optical axis, so as to realize image plane displacement compensation; the system is formed by two zooming groups and two compensation groups arranged between the two zooming groups, the two zooming groups share responsibility for focal power, so that the image plane displacement generated in the zooming process is small, the burden on the compensation groups is reduced, so that the movement curve of the compensation groups is flat. The structure of the optical system is simple, and miniaturization is easy to realize. The system control difficulty has no need to be increased, the amount of system lens can be reduced, the miniaturization can be realized, and the zoom ratio of the optical system can be increased.

Description

technical field [0001] The invention relates to a dual-group linkage infrared continuous zoom optical system. Background technique [0002] Infrared imaging system has the advantages of all-weather work and no need for auxiliary lighting, and has been widely used in military fields such as warning, reconnaissance and guidance. For military equipment, the main targets on the ground are usually ground bunkers, factories, dams, tanks, armored vehicles, cars and soldiers. The surface temperature of these targets is generally not high, the radiation energy is small, and the peak value of thermal radiation is concentrated in the long-wave infrared band. In addition, infrared rays are easily absorbed by substances in the process of atmospheric transmission, but for mist, long-wave infrared is easier to pass through. In this way, compared with medium-wave (3 μm ~ 5 μm) infrared, long-wave infrared imaging systems are more effective in detection and identification. Advantage. [0...

Claims

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Application Information

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IPC IPC(8): G02B15/167G02B1/00
CPCG02B1/00G02B15/167
Inventor 吴海清李同海崔莉田海霞李萍赵新亮
Owner 凯迈(洛阳)测控有限公司
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