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Differential absorption spectrometer import optic block

A differential absorption and optical system technology, applied in the field of optical measurement, can solve problems such as excessive aberration, achieve the effect of solving excessive aberration, reducing overall volume, and improving imaging quality

Inactive Publication Date: 2009-09-09
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide a differential spectrometer into the optical system to solve the problem of excessive phase difference caused by the current differential absorption spectrometer into the optical system measurement

Method used

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  • Differential absorption spectrometer import optic block
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Embodiment Construction

[0016] A differential absorption spectrometer is introduced into the optical system, a telescope 1 is set, and an optical filter 2 and a lens group 3 are sequentially arranged on the follow-up optical path of the telescope 1, and the lens group 3 is provided with three positive lenses and two negative lenses intersecting The lens group adopts a double Gauss structure, chooses quartz (JGS1) as the material of the negative lens, and calcium fluoride (CAF2) as the material of the positive lens. By continuously optimizing the radius of curvature, thickness and distance between the lenses to achieve achieve the best image quality results. Described optical filter 2 is the optical filter of 490nm-700nm visible light band or the optical filter of 287nm-490nm ultraviolet light band; The incident light of ground direction enters telescope 1 and imports lens group 3 through optical filter 2; The light emitted by the group 3 is imaged on the incident slit of the differential absorption s...

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Abstract

The invention discloses an introduction optical system of a differential absorption spectrometer, which is characterized in that a telescope is arranged, and an optical filter and a lens group are sequentially arranged on the follow-up optical path of the telescope, and the light emitted from the lens group is imaged on the incident slit of the differential absorption spectrometer above; the filter is a 490nm-700nm visible light filter or a 287nm-490nm ultraviolet filter; the lens group is composed of three positive lenses and two negative lenses intersecting, The incident light in the direction of the ground enters the telescope and is guided into the lens group through the filter sheet. The invention adopts the transmission method to separately receive and image the ultraviolet waveband and the visible light waveband, thereby effectively reducing the aberration and improving the measurement accuracy.

Description

technical field [0001] The invention belongs to the field of optical measurement methods, in particular to a differential absorption spectrometer leading optical system for collecting and converging ultraviolet scattered light from the earth surface and sky. Background technique [0002] The introduction optical system of the differential absorption spectrometer is to use the airborne platform to image the ultraviolet and visible light of the ground object on the slit of the spectrometer through a series of optical systems. [0003] At present, some foreign methods of introducing optical systems mostly use reflective methods to image the object to be measured on the slit of the spectrometer. [0004] Surface objects directly converge the reflected light to the slit of the spectrometer through the reflector on the airborne platform. Although both the visible light band and the ultraviolet band can be received, the main problem is that the aberration is too large, which will ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/02G01J3/12G01J3/42
Inventor 江宇谢品华司福祺刘文清
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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