Near-infrared high-definition zoom optical system with strong fog penetration capability
An optical system and near-infrared technology, applied in the field of near-infrared high-definition zoom optical systems, can solve the problems of limited secondary spectral aberrations, inability to fully take into account the image quality of visible light and near-infrared bands, and the inability to obtain wide-spectrum information, etc., to achieve Improving the quality of long-focus imaging, improving the quality of short-focus imaging, and high imaging resolution
Active Publication Date: 2021-01-15
FUJIAN FORECAM OPTICS CO LTD
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Problems solved by technology
[0003] At present, the main working band of ordinary fog-permeable lenses is generally 750nm~900nm, and the band is narrow, so it cannot obtain wide-spectrum information; for the wide-spectrum 400nm-1000nm full-band high-definition optical system, the design is limited by secondary spectral aberrations, and cannot Fully consider the image quality of visible light and near-infrared bands, and the general lens adjustment is mainly based on visible light, resulting in the inability to truly achieve high-definition imaging when working with near-infrared fog penetration
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[0029] refer to figure 1 , the present invention has a near-infrared high-definition zoom optical system with strong fog penetration ability. From the object space to the image space, the front fixed group A, the zoom group B, the compensation group C, the diaphragm D, the rear fixed group E and the color filter are arranged in sequence. Sheet F; wherein, the front fixed group A includes the first positive crescent lens A1, the second positive crescent lens A2, and the first cemented group composed of the first negative crescent lens A3 and the third positive crescent lens A4; the zoom group B Including the second cemented group composed of the first biconvex lens B1, the first biconvex lens B2 and the second biconcave lens B3 in close contact with the third biconcave lens B4; the compensation group C includes the second biconvex lens C1, the second negative crescent lens C2 The third cemented group and the fourth positive crescent lens C4 which are closely connected with the...
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Abstract
The invention relates to a near-infrared high-definition zoom optical system with strong fog penetration capability. The system sequentially comprises a front fixed group, a zoom group, a compensationgroup, a diaphragm, a rear fixed group and a color filter from an object space to an image space, and the front fixed group and the compensation group are made of ultra-low dispersion materials, so that the secondary spectral aberration of the optical system is greatly reduced, and high-definition imaging of a 650 nm and 1000 nm near-infrared broadband is realized. The optical system is large inrelative aperture and high in resolution ratio, can be used under the 1064nm laser illumination condition through switching of the color filter, enhances the fog penetration capacity, and has higher fog penetration imaging capacity compared with a common near-infrared optical system in an atrocious weather environment.
Description
Technical field: [0001] The invention relates to a near-infrared high-definition zoom optical system with strong fog penetrating ability, which belongs to the field of optoelectronic technology. Background technique: [0002] Small particles such as smoke and fog in the air have a strong scattering effect on visible light, so ordinary visible light lenses cannot detect targets behind smoke and fog; the longer the wavelength, the stronger the penetration ability, that is, it is easier to bypass obstacles, so if Light waves with longer wavelengths such as near-infrared are less affected by aerosols during propagation, and can penetrate smoke, dust, and fog to achieve accurate focusing. The lens has a fog-penetrating function, which increases the detection distance. [0003] At present, the main working band of ordinary fog-permeable lenses is generally 750nm~900nm, and the band is narrow, so it cannot obtain wide-spectrum information; for the wide-spectrum 400nm-1000nm full-ba...
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IPC IPC(8): G02B15/167
CPCG02B15/167
Inventor 屈立辉王芬钟兆铨刘辉陈秀秀
Owner FUJIAN FORECAM OPTICS CO LTD