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
CN101819062AInactive Publication Date: 2010-09-01ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Publication Date
2010-09-01
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Claims

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