Optical system based on portable efficient-measurement ultraviolet absorption spectrum

An optical system and absorption spectrum technology, which is applied in the field of optical systems based on portable measurement of high-efficiency ultraviolet absorption spectrum, can solve the problems of narrow diode laser wavelength tunable range, restricted movement, fast emergency monitoring, and single type of gas to be measured, etc., to achieve effective energy High utilization efficiency, fast moving emergency monitoring, and light weight

Inactive Publication Date: 2012-08-15
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

Among them, the detection limit of TDLAS is much lower than that of DOAS and FTIR. Its disadvantage is that the diode laser has a narrow wavelength tunable range, and the type of gas to be measured is single. When detecting different gases, it is necessary to replac

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  • Optical system based on portable efficient-measurement ultraviolet absorption spectrum
  • Optical system based on portable efficient-measurement ultraviolet absorption spectrum
  • Optical system based on portable efficient-measurement ultraviolet absorption spectrum

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Embodiment Construction

[0025] Such as figure 1 As shown, the present invention includes an ultraviolet light source deuterium lamp 1, an ultraviolet light source collimating optical system, a multiple reflection cell optical system, and a focusing coupling fiber optical system.

[0026] The ultraviolet light source deuterium lamp 1 emits a light beam in the ultraviolet band. Since the deuterium lamp emits a surface light source and has a large divergence angle, it must be collimated to increase the effective energy entering the subsequent optical system of the multi-reflection pond. The collimating optical system of the ultraviolet light source adopts the front and rear group form. The front group lens is composed of a short focal length positive lens. The divergent beam of the deuterium lamp is initially collimated, and a certain object aperture angle is guaranteed to receive as much light energy as possible. , The rear lens group adopts a negative lens group formed by a combination of positive and ne...

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Abstract

The invention provides an optical system based on a portable efficient-measurement ultraviolet absorption spectrum. The optical system consists of an ultraviolet light source collimation optical system, a multi-reflection basin optical system and a focusing and coupling fiber optical system. The ultraviolet light source collimation optical system consists of an ultraviolet light source and three lenses; the multi-reflection basin optical system adopts a manner of placing three concave-spherical reflection lenses with three curvature radiuses in a conjugated manner; and the focusing and coupling fiber optical system uses a non-spherical single lens to focus and couple outgoing beams for an optical fiber, so that the outgoing beams are guided to a spectrometer for probing. According to the optical system provided by the invention, the detection resolution of the entire system is improved, the measurement accuracy is ensured, and the entire optical system is portable and compact.

Description

Technical field [0001] The invention belongs to the field of optical measurement methods, and in particular relates to an optical system based on portable measurement of high-efficiency ultraviolet absorption spectra. Background technique [0002] Common optical methods include differential absorption spectroscopy (DOAS), tunable diode laser absorption spectroscopy (TDLAS), and Fourier infrared spectroscopy (FTIR). Among them, the detection limit of TDLAS is much lower than that of DOAS and FTIR. Its disadvantage is that the wavelength tunable range of the diode laser is narrow, and the type of measurement gas is single. When detecting different gases, it is necessary to replace the laser of the corresponding wavelength. Therefore, the wavelength range of the laser and the detector limit its use range. FTIR technology has obvious advantages in infrared spectrum analysis. It can obtain full spectrum (2~15um) data at one time. It does not require spectral scanning. It has high lig...

Claims

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Application Information

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IPC IPC(8): G01J3/42G01J3/10G01N21/33
Inventor 江宇谢品华司福祺秦敏陈军
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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