Uniform light source illumination variable color filter type multi-spectral imager

A multi-spectral imaging and uniform light source technology, which is applied in the field of imaging spectrometers, can solve the problems of the combination of no uniform light source technology and variable color filter technology, so as to improve the stability and utilization of light energy, fast band switching speed, The effect of high light energy utilization

Inactive Publication Date: 2010-08-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

In conclusion, there is no precedent for the combination of uniform light source tech

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  • Uniform light source illumination variable color filter type multi-spectral imager
  • Uniform light source illumination variable color filter type multi-spectral imager
  • Uniform light source illumination variable color filter type multi-spectral imager

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Embodiment Construction

[0012] The light source of the present invention adopts a fluorescent lamp with a color temperature of about 6500K and a halogen tungsten lamp with a color temperature of about 3000K. Among them, the 6500K fluorescent lamp is mainly used for multi-channel imaging in the visible light range, while the 3000K halogen tungsten lamp is mainly used to increase the light intensity of the near-infrared spectrum. In order to ensure the stability of the multi-channel image sampling process, the present invention adopts a power supply scheme of a steady current source, and uses an integrating sphere as a structure of a uniform light source.

[0013] The invention adopts a mechanical device to switch color filters in front of a CCD imaging device, that is, drives a stepping motor through a program control interface to quickly switch color filter arrays, and has low cost and is easy to implement and popularize. However, the common systems using AOTF or LCTF are not as good as the solution ...

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Abstract

The invention relates to a uniform light source illumination adjustable color filter optical spectrometer, which is characterized in that: a uniform light source illumination structure is adopted in an optical system, and a color filter array is switched by a mechanical switching device; the whole device comprises a uniform light source structure 3, the color filter array 4, the mechanical switching device, a black-white area array CCD6, a data acquisition processing system and the like; a power supply scheme of a constant-current source 2 is adopted, and an integrating sphere is used as the uniform light source structure; the color filter array 4 adopts a mode of combining a width band with a narrow band; and the color filter array 4 is switched quickly by adopting a step motor driving mode. The uniform light source illumination adjustable color filter optical spectrometer has the characteristics of high resolution, wide spectral range, high light flux and structure miniaturization, and is particularly suitable for multi-spectral imaging systems in the fields of static target recognition and component analysis.

Description

technical field [0001] The invention relates to a variable color filter multi-spectral imager illuminated by a uniform light source, which belongs to the structural design of an imaging spectrometer system in the field of optical engineering and related disciplines, and particularly relates to an imaging spectrometer for measuring spectral images of objects in visible light and near-infrared bands. Background technique [0002] Optical imaging technology and spectral technology are two important fields with a long history and wide application in optoelectronic technology. For a long time, although they have received optical radiation from the target, the optical imager obtains the image information of the target and pursues high spatial resolution. It integrates the entire spectral response of its receiver, but does not have spectral resolution capabilities; while the spectrometer Then the optical radiation of the target is separated into spectra of different wavelengths to ...

Claims

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Application Information

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IPC IPC(8): G01N21/00
Inventor 廖宁放田立勋吴文敏范秋梅冯洁崔德祺林宇谭博能
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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