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Optical system of multispectral area array CCD (Charge Coupled Device) imager

An optical system and imager technology, applied in optics, optical components, instruments, etc., can solve the problems of inability to achieve a wide wavelength range, temperature range, long working distance, etc., achieve a simple structure, reduce volume and weight , the effect of improving image quality

Inactive Publication Date: 2010-10-20
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Description
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Problems solved by technology

[0004] The present invention solves the design requirements of the multispectral optical system that the existing multispectral imager can only obtain the spectral information of a certain band of the target at the same time, and cannot realize a wide band range and temperature range and a long back working distance. The problem of providing an optical system for a multi-spectral area array CCD imager

Method used

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  • Optical system of multispectral area array CCD (Charge Coupled Device) imager
  • Optical system of multispectral area array CCD (Charge Coupled Device) imager
  • Optical system of multispectral area array CCD (Charge Coupled Device) imager

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specific Embodiment approach 1

[0016] Specific implementation mode one: combine figure 1 Illustrate this specific embodiment, the optical system of the multi-spectral area array CCD imager, this system is made up of two sets of subsystems, the wavelength band of the first set of subsystems is from the ultraviolet beam band to the near-infrared beam band, and the ultraviolet beam band to the near-infrared beam band The working band range is 330nm~1100nm; the wavelength band of the second set of subsystems is the long-wave infrared band, and the working band range of the long-wave infrared band is 8000nm~12000nm; the first set of subsystems includes: the first lens group 1, the second Lens group 2, first beam splitter 3, second beam splitter 4, visible light 3CCD detector 5, ultraviolet detector 6 and near-infrared detector 7; the first lens group 1 is a negative lens group, and the second lens Group 2 is a positive lens group; the ultraviolet light beam, blue light beam, green light beam, red light beam and ...

specific Embodiment approach 2

[0026] Specific implementation mode two: combination figure 2 Describe this implementation mode, this implementation mode is a specific embodiment of the first set of subsystems described in the specific implementation mode 1:

[0027] The focal length of the optical system is 60mm, the half angle of view is 3.9°, the F number of the system is equal to 4, and the volume of the optical system is about 100mm×72mm×48mm. In the figure, the first lens 1-1 and the second lens 1-2 form the front negative lens group, and the third lens 2-1, the fourth lens 2-2 and the fifth lens 2-3 form the rear positive lens group, thus constituted With the anti-telescopic structure, a long rear working distance can be obtained. Ultraviolet light beams, blue light beams, green light beams, red light beams and near-infrared light beams all pass through the first lens 1-1, the second lens 1-2 and the third lens 2-1, the fourth lens 2-2 and the fifth lens 2 -3, then reach the first beam splitter 3, ...

specific Embodiment approach 3

[0030] Specific implementation mode three: combination image 3 Describe this implementation mode, this implementation mode is a specific embodiment of the second subsystem in the specific implementation mode 1:

[0031] The focal length of the optical system is 85.30mm, the half angle of view is 3.9°, the F number of the system is equal to 1, and the volume of the optical system is about 85.3mm×85.3mm×110.6mm. The light diameter of the first germanium lens 8 is 85.28mm, the radius of curvature of the front surface 8-1 of the first germanium lens 8 is 98.56mm, and the rear surface 8-2 of the first germanium lens 8 is a diffractive aspheric surface, conical The coefficient is 0.252, and the diffractive surface includes two annular zones, the annular zone widths are 35.671mm and 7.534mm respectively, the radius of curvature of the inner surface 8-2 of the first germanium lens 8 is 134.92mm, and the central thickness of the first germanium lens 8 is 7.00mm, the distance to the s...

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Abstract

The invention discloses an optical system of a multispectral area array CCD (Charge Coupled Device) imager, relating to the field of design and manufacture of the optical system of the multispectral area array CCD imager and solving the problems that the traditional multispectral imager can only obtain spectrum information of a certain wave band of a target at the same time and can not realize the design requirements of a multispectral optical system with wide wave band range and temperature range and a long back working distance. The system consists of two sets of subsystems, a first set of subsystem realizes spectrum information of untraviolet, blue, green, red and infrared wave bands, and the system obtains information of different wave bands through two lens sets and a corresponding detector and carries out imaging; and a second set of subsystem image the obtained information by adopting two germanium lenses and a long wave infrared detector to realize spectrum information of a long wave infrared wave band. The invention realizes simultaneously imaging of a target at six wave bands by adopting two sets of optical systems and is suitable for multispectral imaging places with strict requirements on the volume and the weight, such as aviation shooting.

Description

technical field [0001] The invention relates to the field of optical system design and manufacture of a multi-spectral area array CCD imager. Background technique [0002] The multi-spectral imager effectively combines spectral analysis technology and two-dimensional imaging technology. It can not only perform two-dimensional imaging of the geometric shape of the target, but also obtain rich spectral information of the target, so as to obtain the physical spectral characteristics of the target. There are many optical principles of multispectral imagers, and the core lies in spectroscopic technology. [0003] According to the spectroscopic principle, multispectral imagers can be divided into: dispersion type, interference type, rotating filter type, etc. Dispersion-type imaging spectrometers have two light-splitting methods: grating diffraction and prism dispersion. This type of imaging spectrometer has slits in the optical path, and the luminous flux is not high, which affe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02B27/00G01J3/28
Inventor 郭帮辉孙强吴宏圣王健
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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