METHOD OF DETERMINING SPECTRUM ATTENUATION COEFFICIENT OF COLLIMATED LIGHT IN SEA WATER "in situ" Russian patent published in 2016 - IPC G01N21/59 

FIELD: ecology.

SUBSTANCE: invention can be used for oceanographic tasks and environmental monitoring. From a radiation source sending a light beam and dividing it into two beams, first of which is directed along the optical axis of the measuring channel and directed from the housing of the device into a sea water to a triple-prism, then back into the housing of the device and then to the photodetector. Second beam is directed on the optical axis of the reference channel on the rectangular prism and then to the photodetector. Channel signals are recorded, ambient light contribution is determined on the value of received signals and analogue-to-digital conversion of these signals is provided. To record use a two-element photodetector, on one light-sensitive platform of which is directed first beam, and the second beam to the other. Contribution of ambient light on the values of reference signals and measuring channels is performed by synchronous detection of these signals on each of n preset sections of the spectrum. Values of spectral attenuation coefficient of collimated light are determined using calibration coefficients. Salinity sensor is used, its signals are recorded, their analogue-to-digital conversion is carried out and using the obtained values of signals are introduced the correction coefficients, caused by contribution of variability of fresnel light reflection, to the obtained values of spectrum of the attenuation coefficient of collimated light.

EFFECT: technical result - increase of accuracy and speed of measurement.

1 cl, 1 dwg