Infrared double-waveband athermalization optical lens

An optical lens, dual-band technology, applied in the field of optical lenses, to achieve the effects of high imaging quality, large working distance and simple structure

Inactive Publication Date: 2011-09-14
SUZHOU UNIV
View PDF6 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of optical passive athermalization method to provide an optical lens that works in the dual bands of medium-wave and long-wave infrared has not been reported.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Infrared double-waveband athermalization optical lens
  • Infrared double-waveband athermalization optical lens
  • Infrared double-waveband athermalization optical lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.

[0019] The technical solution of this embodiment is to provide a kind of mid-wave and long-wave infrared dual-band adiabatic optical lens, whose design parameters are: working wavelength 3-5μm and 8-12μm, focal length 100mm, field angle 7.04°, F The number is 2.

[0020] See attached figure 1 , which is a structural schematic diagram of the optical lens described in this embodiment. Depend on figure 1 It can be seen that the optical lens adopts the common optical axis Kirk three-piece structure, which is composed of four refracting lenses. According to the incident direction of light, they are the first lens 1, the second lens 2, and the third lens 3 respectively. And the fourth lens 4, the aperture stop is located at the cold screen of the image plane, without vignetting.

[0021] The specific data and materials used for each ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an infrared double-waveband athermalization optical lens, which is characterized in that working wavebands are 3-5 microns and 8-12 microns and a working ambient temperature range is from -60 DEG C to 80 DEG C. The lens is of a common optical axis Cooke triplet structure and comprises four refractor lens; an aperture diaphragm is arranged at a cold screen of an image surface; in the incidence direction of light, the back surface of a first lens [1] and the front surface of a third lens [3] are aspheric surfaces; the materials of lens are germanium, zinc selenide, zinc sulfide and zinc selenide in sequence; and when the lens focus is normalized, the value range of focal power is as follows: Phi 1 is more than or equal to -1.0 but less than or equal to -0.5, Phi 2 is more than or equal to 1.50 but less than or equal to 2.0, Phi 3 is more than or equal to -2.0 but less than or equal to -1.50, and Phi 4 is more than or equal to 1.0 but less than or equal to 1.5. The optical lens has the advantages that the structure is simple, the imaging quality is high, the athermalization effect is good, the later working distance is long, the cold aperture diaphragm efficiency is 100%, and the like. The infrared double-waveband athermalization optical lens can be used as an infrared double-color guiding head and has wide application prospect in both military and civil fields.

Description

technical field [0001] The invention relates to an infrared optical lens working in the middle wave and long wave bands, in particular to an optical lens working in the 3-5μm and 8-12μm wavebands and adiabatic, which can be used in the environment of -60°C to +80°C imaging over a temperature range. Background technique [0002] Infrared imaging is based on the difference in irradiance between the target and the background. According to Planck’s blackbody radiation law, the medium-wave infrared with a wavelength of 3-5 μm is mainly used to observe high-temperature events, and the long-wave infrared with a wavelength of 8-12 μm is used to detect the contours of objects at room temperature. The imaging characteristics of the two bands can improve the detection and identification capabilities of targets. Detector arrays sensitive to these two infrared bands include dual-band mercury cadmium telluride focal plane arrays and quantum well infrared photodetector arrays, and now the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B13/18G02B1/00G02B3/08
Inventor 沈为民张春艳
Owner SUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap