Off-axis reflection-based import optical system

An optical system and off-axis reflection technology, applied in absorption/scintillation/reflection spectroscopy, optical radiation measurement, scientific instruments, etc., can solve problems such as large aberrations, achieve excessive aberrations, facilitate focusing coupling into optical fibers, The effect of good resolution and contrast

Inactive Publication Date: 2010-09-01
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The purpose of the present invention is to provide an off-axis reflection-based introduction optical system, which uses an off-axis parabolic mirror to solve the problem of excessive aberration caused by the measurement of the introduction optical system of the current passive differential absorption spectrometer

Method used

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  • Off-axis reflection-based import optical system
  • Off-axis reflection-based import optical system
  • Off-axis reflection-based import optical system

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Embodiment Construction

[0014] Such as figure 1 , figure 2 shown. An introduction optical system based on off-axis reflection, including a reflective prism 1, an off-axis parabolic reflector 2 and an optical fiber 3 are arranged on the subsequent optical path of the reflective prism 1, and the scattered light from the sun passes through the reflective prism 1 after turning the optical path, and then passes through the The off-axis parabolic mirror 2 is reflected and focused onto the end of the optical fiber 3 extending into the housing (the numerical aperture of the off-axis parabolic mirror 2 needs to match the numerical aperture of the optical fiber), and then the spectrometer 4 is used for dispersion and digital collection, and finally to the industrial computer 5 for calculation and analysis.

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Abstract

The invention discloses an off-axis reflection-based import optical system, which comprises a shell. Optical fibers outside the shell are extended into the shell; a through hole is reserved on the sidewall of the shell; a rotating shaft is extended out of the through hole; the extended-out tip of the rotating shaft is provided with a reflecting prism; an off-axis paraboloidal reflecting mirror is arranged on a reflecting light path of the reflecting prism in the shell; and the extended-in ends of the optical fibers are positioned on a focus point of the reflecting light path of the off-axis paraboloidal reflecting mirror. The off-axis reflection-based import optical system can meet requirements on the measurement of a passive differential optical absorption spectroscopy to further solve the problem of over-great image errors of the import optical system of the passive differential optical absorption spectroscopy, and can ignore the requirements on the selection of lens materials due to a reflection mode.

Description

technical field [0001] The invention relates to the field of optical measuring instruments, in particular to an off-axis reflective import optical system of a passive differential absorption spectrometer for collecting and converging solar scattered light. Background technique [0002] At present, some foreign methods of introducing optical systems mostly use transmission or coaxial reflection methods to gather and couple the scattered light from the outside sun into the optical fiber. Since the detection spectrum range of the passive differential absorption spectrometer is 290-400nm, the spectral resolution must be increased to above 0.6nm, and sufficient energy must be obtained to improve the measurement accuracy. The method of using a single lens in the above band will inevitably bring about chromatic aberration. Due to the different wavelengths, the refractive index when passing through the lens is different, forming a color spot on the image side, thereby reducing the c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/02G01J3/42
Inventor 江宇张天舒陆亦怀刘文清
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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