Changes in Chromaticity Coordinates of Laser and LED Light Sources Due to Nonlinearity of Array Spectroradiometers

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  • Tanabe Minoru
    National Institute of Advanced Industrial Science and Technology
  • Godo Kenji
    National Institute of Advanced Industrial Science and Technology
  • Shitomi Hiroshi
    National Institute of Advanced Industrial Science and Technology

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  • アレイ式分光放射計の応答非直線性によるレーザ光源やLED光源の色度測定への影響
  • アレイシキ ブンコウ ホウシャケイ ノ オウトウ ヒチョクセンセイ ニ ヨル レーザ コウゲン ヤ LED コウゲン ノ シキド ソクテイ エ ノ エイキョウ

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Abstract

<p>Consideration of nonlinearity properties of array-spectroradiometers is important in the fields of photometry, radiometry, and colorimetry. The nonlinearity properties of two commercial array-spectroradiometers were investigated, and the maximum nonlinear behavior of 24 % was observed. The errors in the measurement of chromaticity coordinates (x, y) by these array-spectroradiometers due to the nonlinearity were investigated using three white light sources based on light emitting diodes and laser diodes. It was found that 24 % nonlinearity caused the change of chromaticity coordinates up to 0.018. Correction of a spectroradiometer with respect to the nonlinearity would enable us to obtain accurate colorimetric data for light sources.</p>

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