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Ultraviolet wide-spectrum large-relative-aperture optical lens

A technology of optical lens and relative aperture, which is applied in the field of optical lens, can solve the problems of wide working band and high resolution, and achieve the effects of high resolution, high energy consistency and large relative aperture

Active Publication Date: 2021-01-01
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the short working band of the ultraviolet photoelectric imaging detection system, most of the existing ultraviolet lenses and imaging systems cannot meet the requirements of large relative aperture, wide working band and high resolution at the same time.

Method used

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  • Ultraviolet wide-spectrum large-relative-aperture optical lens
  • Ultraviolet wide-spectrum large-relative-aperture optical lens
  • Ultraviolet wide-spectrum large-relative-aperture optical lens

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Embodiment Construction

[0019]The technical scheme of the present invention will be further described below in conjunction with the drawings.

[0020]As attachedfigure 1 As shown, the ultraviolet broad spectrum large relative aperture optical lens and imaging system of this embodiment includes, from the object side to the image side, a first lens with negative refractive power 1, a second lens with positive refractive power 2, and a negative lens. The third lens 3 with refractive power, the fourth lens 4 with positive refractive power, the aperture stop 9, the fifth lens 5 with negative refractive power, the sixth lens 6 with positive refractive power, and the negative refractive power The seventh lens 7, the eighth lens 8 with positive refractive power, the filter 10 and the ultraviolet detection image plane 11; wherein the aperture stop 9 coincides with the object side surface of the fifth lens 5.

[0021]The first lens is a convex-concave lens, the second lens is a biconvex lens, the third lens is a concave f...

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Abstract

The invention discloses an ultraviolet wide-spectrum large-relative-aperture optical lens. The optical lens is composed of eight spherical lenses and an ultraviolet optical filter. The focal power ofthe lens is sequentially negative, positive, negative, positive, negative, positive, negative and positive from the object side to the image side. The lens is made of a calcium fluoride or fused quartz material. In a full view field range, the modulation transfer function value of the 50-line pair at the cut-off frequency per millimeter is superior to 0.4. The maximum vertical-axis chromatic aberration of the ultraviolet wide-spectrum optical lens and the imaging system does not exceed 10 [mu]m in the full-view-field range, the maximum distortion value is superior to 1%, and the relative illuminance value is superior to 95%. The ultraviolet optical lens and the imaging system have the characteristics of wide ultraviolet spectrum, large relative aperture and high resolution, and are convenient to process and detect.

Description

Technical field[0001]The invention relates to an optical lens, in particular to an ultraviolet wide spectrum and large relative aperture optical lens.Background technique[0002]Ultraviolet light band (200nm-360nm), as a very important photoelectric detection window, has been widely used in civil, industrial and military applications. With the continuous development of UV detector technology, UV photoelectric imaging detection technology has gradually attracted the attention of researchers; UV photoelectric imagers have important applications in forest fire prevention, criminal reconnaissance, corona detection and warning technology.[0003]In "Optical System Design of Plume Ultraviolet Radiation Monitoring Unit" (Laser and Optoelectronics Progress, 53: 112202, 2016), Shi Entao and others designed a short focal length and large field of view ultraviolet lens, its working wavelength is 270nm-360nm, ultraviolet The bandwidth is 90nm, and the number of lenses used is 10; He Lipeng et al. s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B1/00
CPCG02B1/00G02B13/143
Inventor 叶井飞郑州朱润徽亓昊阳宋真真曹兆楼郑改革
Owner NANJING UNIV OF INFORMATION SCI & TECH
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