Apparatus for determining the spectral dependence of diffuse reflectance

摘要

The invention relates to the field of colorimetry and is intended to measure the spectral dependence of the diffuse reflectance of a variety of materials that can be used to determine their color coordinate; The problem to be solved by the invention is to improve the accuracy of measurement of the spectral dependence of the diffuse reflectance due to elimination of problems triplet absorption by the use of continuous illumination of the sample.; Apparatus for determining the spectral dependence of the diffuse reflectance, includes a spectrophotometer SF-46, the sample compartment is further equipped with a light-tight chamber, providing 45/0 measuring geometry, a photomultiplier, an aperture diaphragm, creating a standard observation conditions and corrective optical filter, cut-off energy in the luminescence band. The apparatus operates as follows. The spectrophotometer sample compartment SF-46 set the pattern of the material. Guided by the rules of operation on an SF-46, is set a predetermined wavelength. In accordance with the passport to the photomultiplier measured value of the anode current I. Then, instead of the test material sample placed in the sample compartment standard white light and also measure the magnitude of the anode current I ₀ photomultiplier. The coefficient of diffuse reflection of the investigated sample count by the formula γ = I / I _0.; The technical result consists in the fact that the proposed device makes it possible to significantly increase the accuracy of determining the spectral dependence of the diffuse reflectance due to elimination of problems triplet absorption by the use of continuous illumination of the sample.