Abstract
A method and an optical device have been developed for the spectral distribution measurement of optical radiation (OR), the measurement of the erythemal UV-irradiance and dose, and of the spherical erythemal irradiance and dose using only one instrument with a spherical photodetector. In this case the spectral sensitivity of the instrument is unchanged for the two measurements. The device for the measurement of the spectral distribution of OR is produced as a disc with six built-in interference filters with their maxima of transmission in the range of 280–400 nm. Data processing and histogram restoration of the OR spectral distribution is done according to a method developed and based on the solution of a seven-degree polynom. The device for measurement of irradiance and the dose on-plane is made of opaque material and is in the form of an overturned cylindrical cup with a circular opening in the bottom. The photometer-dosimeter has a spectral sensitivity near to the spectrum of erythem action of OR. A special vacuum photoelement is used with a spherical photocathode and an optical correcting filter system (OCFS) shaped as an irregular dodecahedron. The measurement of the erythemal irradiance and dose from natural and artificial sources of OR is in the range 280–400 nm, in efficiency units (mer/m 2), with an error of no more than ±10%.
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