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A short-wave infrared wide-spectrum four-component telephoto continuous zoom optical system

A short-wave infrared, optical system technology, applied in optics, optical components, instruments, etc., can solve the problems of difficult to correct chromatic aberration secondary spectrum, complex zoom structure, large number of lenses, etc., to improve telephoto detection ability, simple zoom form , the effect of high image quality

Active Publication Date: 2022-07-01
HEBEI HANGUANG HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Generally, an optical system with a focal length of 300mm is called an optical system with telephoto capability, and the short-wave infrared spectrum has a wide range, and the focal length will bring aberrations such as chromatic aberration and secondary spectrum that are difficult to correct. The focal length of the component continuous zoom system generally does not exceed 200mm, resulting in a short detection distance of the existing short-wave infrared zoom optical system
Although the five-element or multi-element linkage zoom system is easier to correct the target aberration, but the number of lenses is large, the zoom structure is complicated, the installation is difficult, the cost is high, and the reliability is poor

Method used

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  • A short-wave infrared wide-spectrum four-component telephoto continuous zoom optical system
  • A short-wave infrared wide-spectrum four-component telephoto continuous zoom optical system
  • A short-wave infrared wide-spectrum four-component telephoto continuous zoom optical system

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Embodiment 1

[0058] In this embodiment, the design parameters of each lens from the object side to the image side of the short-wave infrared wide-spectrum four-component telephoto zoom optical system are shown in Table 3-4 below:

[0059] table 3

[0060]

[0061]

[0062] Table 4

[0063]

[0064] The working spectral range of the system described in this embodiment is 0.95-1.7 μm, the focal length is 30-300 mm, the zoom ratio is 10 times, the field of view angle is 23.17°-2.35°, and the relative aperture is 1:4-1:5.6. Detector type InGaAs, resolution 640×512, pixel size 15μm, working temperature: -40℃~60℃. The system adopts the design of the fastest zoom curve, the zoom group G2 and the compensation group G3 have a small moving range, and the zoom structure is compact.

[0065] The MTF results of the system at different focal lengths are as follows Figure 5-7 As shown, the results show that the MTFs of the 0.707 field of view are all greater than 0.4@33lp / mm, which can meet ...

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Abstract

The invention relates to a short-wave infrared wide-spectrum four-component telephoto continuous zoom optical system, which belongs to the technical field of short-wave infrared imaging. The system includes a front fixed group G1 with a positive refractive power, a zoom group G2 with a negative refractive power, a compensation group G3 with a positive refractive power, a diaphragm and a refractive power, which are sequentially arranged from the object side to the image side. It is the positive rear fixed group G4; among them, the zoom group G2 and the compensation group G3 move forward and backward along the optical axis to realize the continuous zoom imaging of the system; by setting the appropriate lens group and controlling the focal length of each group, the system has a larger size. The focal length range and longer focal length expand the detection range and maximum detection distance, thereby improving the detection sensitivity of the short-wave infrared broad spectrum in telephoto detection, and improving the telephoto detection capability under low illumination and low visibility.

Description

technical field [0001] The invention relates to a short-wave infrared wide-spectrum four-component telephoto continuous zoom optical system, which belongs to the technical field of short-wave infrared imaging. Background technique [0002] Generally, an optical system with a focal length of 300mm is called an optical system with telephoto capability, while the short-wave infrared spectral range is wide, and the focal length will bring about aberrations such as chromatic aberration and secondary spectrum that are difficult to correct. Therefore, the existing short-wave infrared four The focal length of the component continuous zoom system generally does not exceed 200mm, resulting in a small detection distance of the existing short-wave infrared zoom optical system. Although the five-component or multi-component linkage zoom system is easier to correct the target aberration, but the number of lenses is large, the zoom structure is complex, the assembly and adjustment are diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/14G02B15/15
CPCG02B15/144113G02B15/15
Inventor 刘文奇
Owner HEBEI HANGUANG HEAVY IND
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