To solve the problems that measuring time intervals are substantially widened since alterations of basic measuring conditions such as charge storage time of a PDA detector during repetitive and continuous measuring have required measuring halting once and measuring and processing for acquiring reference data (dark current data etc.) required for data processing. 繰り返し連続測定中にPDA検出器の電荷蓄積時間等の基本測定条件の変更を行う場合には、一旦測定を中止してデータ処理に必要な基準データ(暗電流データ等)を取得するための測定や処理が必要であるため測定時間間隔が大きく空いてしまう。 - 特許庁