Segmented light path-based water absorption coefficient measuring device

Abstract

The invention discloses a segmented light path-based water absorption coefficient measuring device. The segmented light path-based water absorption coefficient measuring device comprises a light source unit, a sample pond unit, a detecting unit, a sealing unit, a control unit and the like, wherein the light source unit is used for emitting light; the sample pond unit is composed of a light incident window, a diaphragm group, a semi-transparent lens group and a light collector sequentially arranged in an incident light path; diaphragms and semi-transparent lenses are distributed in an alternatemode; the detecting unit comprises optical couplers, optical fibers, a photoswitch and a spectrograph; the reflecting light path of every semi-transparent lens is provided with one optical coupler, and every optical coupler is connected with the photoswitch and the spectrograph through the corresponding optical fiber; the light source unit, the photoswitch and the spectrograph are connected withthe control unit. Compared with traditional water absorption measuring devices, the segmented light path-based water absorption coefficient measuring device achieves light detection on signals of different absorption lengths, thereby expanding the absorption coefficient measurement range.

Description

technical field [0001] The invention relates to the technical field of marine optical water body measurement, in particular to a water body absorption coefficient measurement device based on a segmented optical path. Background technique [0002] Water body absorption coefficient is one of the most basic parameters in the field of ocean optics. At present, there are optical systems used for the measurement of water body absorption coefficient, such as spectrophotometer, Acs, Ac9, etc. However, spectrophotometers are usually used for laboratory measurements. Acs, Ac9, etc. have high detection accuracy in clear water bodies. However, in turbid water bodies, such as the East China Sea, due to the long detection optical path, the light intensity attenuation is serious. The resulting signal strength is too weak and the detection signal-to-noise ratio is low. Therefore, a water body absorption coefficient measurement system that can be used for in-situ detection and can work nor...

AI Technical Summary

Problems solved by technology

However, spectrophotometers are usually used for laboratory measurements. Acs, Ac9, etc. have high detection accuracy in clear water bodies. However, in turbid water bodies, such as the East China Sea, due to the long detection optical path, the light intensity attenuation is serious. The obtained signal strength is too weak, and the detection signal-to-noise ratio is low

Images