Spectrum self-correction photometer and measuring method thereof

Abstract

The invention discloses a spectrum self-correction photometer and a measuring method thereof. The spectrum self-correction photometer comprises a light entrance, an optical spectroscope, a spectrometer and a silicon photovoltaic cell with a color filter, wherein light to be measured is divided into at least two beams by the optical spectroscope according to a set proportion; one part of beams is received by the spectrometer, the other part of beams is received by the silicon photovoltaic cell, and the light to be measured is simultaneously measured by the beams. The spectrum self-correction photometer of the invention can greatly reduce errors brought by the mismatch of the spectrum, has less reliance on the spectrum of the light to be measured, overcomes the problems brought by inconsistent special spectrum power distribution of a light source to be measured, time-varying luminescence, and the like, has relative smaller system measuring error and random error and high measuring repetitiveness and is calibrated by utilizing an absolute spectrum radiometer as a standard source so that the absolute magnitude transmission chain of an optical radiation degree is very short. The spectrum self-correction photometer has higher precision and reliable absolute magnitude value and can be applied to various optical radiation measuring systems for measuring a plurality of important optical radiation parameters.

Description

【Technical field】 [0001] The invention relates to an instrument for measuring luminosity, radiance or / and chromaticity, in particular to a spectrum self-correcting photometer. 【Background technique】 [0002] Light (radiation) metrics include light (radiation) flux, (radiation) illuminance, (radiation) light intensity, (radiation) brightness, etc., as well as chromaticity, which is a very important value for evaluating light sources and lighting sites. The luminosity takes into account the response of the human eye to light radiation, and is the weighted integral value of the spectral radiant power and the V(λ) function, which is the standard spectral apparent efficiency function of the International Commission on Illumination (CIE). The light intensity unit "candela" in luminosity is one of the seven international basic units. The radiometric is the magnitude of the direct integration of the spectral radiant power or the weighted integral with other corresponding functions,...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the above-mentioned defects in the existing photoradiometric measurement, the present invention aims to provide a spectral self-calibration photometer and its measurement method, which can greatly reduce the value transfer error in the photoradiometric measurement and the impact on the measured light source. Spectral dependence and linear error and other various systematic errors and random errors, and overcome the problems caused by the uneven spatial spectral power distribution of the measured light source and the change of luminescence with time, etc., with high measurement accuracy, and the operation Convenient, easy to implement, and can be applied to various photometric systems

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