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Aspheric short-wave infrared lens

A short-wave infrared and aspheric technology, which is applied in optical components, instruments, optics, etc., can solve the problems of the design of miniaturized short-wave infrared image square telecentric telescopic lens, etc.

Active Publication Date: 2021-09-10
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Combining the above factors, it is difficult to design a miniaturized short-wave infrared image square telecentric lens

Method used

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0024] Please see figure 1 , is the structure diagram of the optical system of the present invention, the aspherical short-wave infrared lens includes 5 lenses, and the 5 lenses are arranged in the form of positive, negative, negative, negative, positive, and the lens adopts an aspheric surface, which is beneficial to simplify the optical path str...

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Abstract

The invention provides an aspheric short-wave infrared lens which comprises five lenses, wherein the five lenses are sequentially positive, negative, negative, negative and positive lenses in the light incidence direction. The focal length of the lens is 16.8 mm, the F number is 2.5, the working wave band is a short-wave infrared wave band, the wavelength range is 1000-2500nm, the field angle is 16 degrees, the total optical length of the system is 39.4 mm, and the rear intercept is 11.6 mm; and the lens is designed to be of an image space telecentric structure, can be mainly used as a telescopic system of a short-wave infrared imaging spectrum instrument, and can also be directly used as a short-wave infrared imaging system. According to the lens, an aspheric surface technology is adopted in the design process, various aberrations are corrected and balanced, and finally the lens has the advantages of being wide in working wave band range, large in relative aperture, long in back focal length, excellent in image quality, small in size and light in weight.

Description

technical field [0001] The invention relates to the technical field of optical design, in particular to an aspherical short-wave infrared lens. Background technique [0002] The imaging spectrometer mainly includes two parts: the telescopic system and the spectroscopic system. The main function of the telescopic system is to image the target, while the main function of the spectroscopic system is to separate the image of the target according to different wavelengths. The system decides. Short-wave infrared is a band in the solar reflection spectrum region, which is of great significance for non-active illumination light detection. Therefore, short-wave infrared imaging spectrometers have important applications in many fields. In recent years, UAV technology has developed rapidly, and the development of portable short-wave infrared imaging spectrometers that can be mounted on UAVs has become a research hotspot. [0003] The short-wave infrared band ranges from 1000nm to 250...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B13/18G02B13/22G02B1/00
CPCG02B13/14G02B13/18G02B13/22G02B1/00
Inventor 陈建军李雪
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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