Establishment of Highly Accurate Linearity Evaluation Method for Array Spectroradiometer Using Flux Addition Method

Abstract

A Linearity measurement of array spectroradiometer is of great importance in the fi elds of photometry, radiometry, and thermometry. An accurate linearity measurement system with the flux addition method has been developed to evaluate linearity characteristics of array spectroradiometer. A nonlinear behavior of 4 % for an array spectroradiometer in the visible light was measured with reproducibility of less than 0.2 %. This result enables us to correct the nonlinear behavior of the array spectroradiometer and contributes to highly accurate optical measurements.