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.