PROBLEM TO BE SOLVED: To evaluate marking quality of identity marks such as two-dimensional symbols marked on objects, and the like.SOLUTION: A marking quality evaluation device irradiating an identity mark marked on a surface of an object with light, and evaluating a marking quality of the read identity mark includes: evaluation value acquisition means that, when reading the identity mark with the light irradiated, causes an amount of the light to vary from a minimum value to a maximum value and acquires a first minimum amount of the light capable of reading the identity mark, and causes the amount of the light to vary from the maximum value to the minimum value and acquires a second minimum amount of the light capable of reading the identity mark, and acquires a difference between the acquired first minimum amount of light and the acquired second minimum amount of light as an evaluation value of the marking quality and evaluation value determination means that compares the evaluation value acquired by the evaluation value acquisition means with a prescribed reference value, and when the evaluation value does not exceed the reference value, determines that the marking quality of the identity mark deteriorates.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2017,JPO&INPIT【課題】対象物にマーキングされた2次元シンボルなどの識別記号のマーキングの品質を評価する。【解決手段】対象物の表面にマーキングされた識別記号へ光を照射して読み取った上記識別記号のマーキング品質を評価する識別記号のマーキング品質評価装置において、光を照射して識別記号を読み取る際に、上記光の光量を最小値から最大値まで変化させて上記識別記号を読み取り可能な第1の最小の光量を取得し、かつ、上記光の光量を最大値から最小値まで変化させて上記識別記号を読み取り可能な第2の最小の光量を取得し、上記取得した第1の最小の光量と第2の最小の光量との差分をマーキング品質の評価値として取得する評価値取得手段と、上記評価値取得手段で取得された上記評価値と所定の基準値とを比較して、上記評価値が上記基準値に満たないときに、上記識別記号のマーキング品質が劣化したと判定する評価値判定手段とを有する。【選択図】 図6
