Optical system for infrared medium and long wave spectrum imaging

A technology of spectral imaging and optical system, applied in the field of infrared imaging optics, achieves the effect of wide application prospect, simple structure and easy realization

Inactive Publication Date: 2014-09-10
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Description
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Problems solved by technology

At present, there is no report on the multi-spectral infrared imaging optical system working in the medium-wave to long-wave infrared band, aiming at a single wide-band detector, large relative aperture, and narrow-band confocal surface.

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  • Optical system for infrared medium and long wave spectrum imaging
  • Optical system for infrared medium and long wave spectrum imaging
  • Optical system for infrared medium and long wave spectrum imaging

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Embodiment Construction

[0037] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0038] In order to meet the needs of the uncooled detector for the relative aperture of the imaging optical system, the relative aperture of the imaging optical system of the present invention should reach 0.9-1.1, based on this requirement combined with factors such as the working wavelength transmittance and focal length of the optical imaging system, the present invention The invention provides an infrared medium and long-wave spectral imaging optical system, including a broadband lens assembly and a multi-spectral color filter assembly 6. The broadband lens assembly is placed in front of the multi-spectral color filter assembly 6 for focusing and imaging light waves. The band lens assembly includes an aperture stop and 5 lenses, according to the incident direction of the light, they are the aperture stop, the first lens 1, the second lens 2, the third l...

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Abstract

The invention discloses an optical system for infrared medium and long wave spectrum imaging. The optical system comprises a board band lens assembly and a multi-spectral filter assembly. The board band lens assembly is arranged in front of the multi-spectral filter assembly and used for optical wave focus imaging. The multi-spectral filter assembly is used for conducting filtering and cofocal plane compensation on optical wave used for focusing the broad band lens assembly. The optical system for imaging is large in hole diameter which can reach 0.9-1.1, and imaging quality approaches diffraction limit. The optical system adopts the broad band lens assembly and the multi-spectral filter assembly to achieve the multi-spectral imaging system. The system is simple in structure and easy to achieve. Cofocal plane compensation in narrow band imaging is well achieved by thickness change of a band-pass parallel plate filter, and complexity of broad band lens design is reduced. The optical system is used for non-refrigeration broadband infrared multi-spectral imaging and has wide application prospect in the fields of military industry and civil use.

Description

technical field [0001] The invention relates to the technical field of infrared imaging optics, in particular to a multi-spectral imaging optical system working in the 3 μm-12 μm band, large relative aperture, and narrow band confocal plane. Background technique [0002] Broadband infrared multispectral imaging can improve the ability of information detection and recognition, and it has broad application prospects in military reconnaissance, aerospace remote sensing, industrial vision and other fields. At present, uncooled infrared detectors based on the pyroelectric effect can simultaneously respond to infrared light radiation in the medium-wave to long-wave bands. This makes it necessary to develop a broadband multispectral infrared imaging optical system for uncooled detectors. [0003] The commonly used structural forms of infrared imaging optical systems are reflective and refractive. The reflective structure does not introduce any chromatic aberration, and the optica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28G01J3/02G02B27/00G02B13/14G02B13/18G02B1/00G02B5/20
Inventor 金伟其顿雄王霞李家琨金明磊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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