RU2014103423A

RU2014103423A - METHOD FOR MEASURING REFRACTION INDICATOR AND DISPERSION AND DEVICE FOR ITS IMPLEMENTATION

Info

Publication number: RU2014103423A
Application number: RU2014103423/28A
Authority: RU
Inventors: Ринад Исмагилович Волков; Михаил Иванович Филатов
Original assignee: Открытое акционерное общество "Швабе - Технологическая лаборатория"
Priority date: 2014-01-31
Filing date: 2014-01-31
Publication date: 2015-08-10
Also published as: RU2562270C2

Abstract

1. Способ измерения показателя преломления и дисперсии, основанный на явлении полного внутреннего отражения на плоскости соприкосновения исследуемого вещества с оптическим элементом, которую освещают расходящимся пучком света от точечного или щелевого источника света, часть света, претерпевшую полное внутреннее отражение, направляют на многоэлементное матричное фотоприемное устройство (МФПУ), на фоточувствительной поверхности которого формируют зоны света и тени, отличающийся тем, что расходящийся пучок света формируют от нескольких монохроматических источников света различных длин волн, светорассеивателем преобразуют в единый расходящийся пучок света и направляют на многоспектральное МФПУ, спектральная чувствительность элементов матрицы которого соответствует спектрам источника света, с МФПУ получают раздельные для каждой длины волны спектральные сигналы, измеряют для каждой строки МФПУ длительность импульса, соответствующего зоне тени для каждого спектрального сигнала, находят средние значения длительности импульсов спектральных сигналов для всех участвующих в измерении строк, вычисляют отношение полученных средних значений длительности импульсов к длительности строки МФПУ, по полученному отношению определяют показатель преломления исследуемого вещества для данной длины волны, вычисляют разность между показателями преломления для разных длин волн, которая пропорциональна дисперсии для данного диапазона длин волн.2. Устройство для измерения показателя преломления, содержащее источник света, оптический элемент, выполненный в виде призмы из стекла с высоким показателем преломления, 1. The method of measuring the refractive index and dispersion, based on the phenomenon of total internal reflection on the plane of contact of the test substance with the optical element, which is illuminated by a diverging beam of light from a point or slit light source, the part of the light that has undergone total internal reflection is sent to a multi-element photodetector array (MFPU), on the photosensitive surface of which form zones of light and shadow, characterized in that the diverging beam of light is formed from several x monochromatic light sources of different wavelengths, they are converted into a single diverging light beam by a diffuser and sent to a multispectral MFP, the spectral sensitivity of the matrix elements of which corresponds to the spectra of the light source, MFPs receive spectral signals separate for each wavelength, measure the pulse duration for each MFPA line, corresponding to the shadow zone for each spectral signal, find the average values of the duration of the pulses of the spectral signals for all areas For the measurement of strings, the ratio of the obtained average values of the pulse duration to the multifunction line length is calculated, the refractive index of the analyte for a given wavelength is determined from the obtained ratio, the difference between the refractive indices for different wavelengths is calculated, which is proportional to the dispersion for a given wavelength range. . A device for measuring the refractive index, containing a light source, an optical element made in the form of a prism of glass with a high refractive index,

Claims

1. The method of measuring the refractive index and dispersion, based on the phenomenon of total internal reflection on the plane of contact of the test substance with the optical element, which is illuminated by a diverging beam of light from a point or slit light source, the part of the light that has undergone total internal reflection is sent to a multi-element photodetector array (MFPU), on the photosensitive surface of which form zones of light and shadow, characterized in that the diverging beam of light is formed from several x monochromatic light sources of different wavelengths, they are converted into a single diverging light beam by a diffuser and sent to a multispectral MFP, the spectral sensitivity of the matrix elements of which corresponds to the spectra of the light source, MFPs receive spectral signals separate for each wavelength, measure the pulse duration for each MFPA line, corresponding to the shadow zone for each spectral signal, find the average values of the duration of the pulses of the spectral signals for all areas uyuschih in the measurement rows is calculated ratio of the mean value of pulse duration to the MFP line duration determined by the resulting relative index of refraction of the test substance for a given wavelength, calculating a difference between the refractive indices for different wavelengths, which is proportional to the variance for a given range of wavelengths.

2. A device for measuring the refractive index containing a light source, an optical element made in the form of a prism made of glass with a high refractive index, the working face of which is in contact with the test substance, a matrix photodetector (MFP), a microprocessor and a display connected to the information output of the microprocessor characterized in that the light source is made in the form of LEDs with different wavelengths of radiation and a diffuser that converts the fluxes from the LEDs into a single light flux, as well as not used MFP with spectral sensitivity of a pixel at wavelengths conjugate to the wavelengths of the radiation of the LEDs.