An ultraviolet wide spectrum large relative aperture optical lens

An optical lens and relative aperture technology, applied in the field of optical lenses, can solve the problems of high working band width and high resolution, and achieve the effects of high resolution, small overall chromatic aberration, and easy processing and detection.

Active Publication Date: 2022-03-29
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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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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  • An ultraviolet wide spectrum large relative aperture optical lens
  • An ultraviolet wide spectrum large relative aperture optical lens
  • An ultraviolet wide spectrum large relative aperture optical lens

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Embodiment Construction

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

[0020] as attached figure 1 As shown, the ultraviolet wide-spectrum large relative aperture optical lens and imaging system of this embodiment include sequentially from the object side to the image side: a first lens 1 with negative refractive power, a second lens 2 with positive refractive power, and a second lens 2 with negative refractive power. The third lens 3 of 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, the sixth lens 6 with 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] Wherein the first len...

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Abstract

The invention discloses an ultraviolet wide-spectrum large relative aperture optical lens, which is composed of eight spherical lenses and an ultraviolet filter. The focal power of the lens is negative, positive, negative, positive, negative, positive, negative, positive from the object side to the image side. The lens is made of calcium fluoride or fused silica. The modulation transfer function value is better than 0.4 at the cutoff frequency of 50 line pairs per millimeter in the full field of view. The vertical-axis chromatic aberration of the ultraviolet wide-spectrum optical lens and imaging system does not exceed 10 microns at most in the full field of view, the maximum distortion value is better than 1%, and the relative illuminance value is better than 95%. The ultraviolet optical lens and imaging system have the characteristics of wide ultraviolet spectrum, large relative aperture and high resolution, and are convenient for processing and detection.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/14G02B1/00
CPCG02B13/143G02B1/00
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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