| abstract |
Equipped with: a color-changing layer, including a color-changing part with the characteristics of changing from a first material to a second material by the irradiation of laser light; the first layer, which has transmittance to laser light; the second layer, which has For laser light transmittance, at least a part of the second layer is located between the color changing layer and the first layer; and the coating layer has laser light transmittance and covers at least the first layer. The adhesion between the coating layer and the first layer is weaker than the adhesion between the first and second layers. One of the first and second layers has the ability to change from the unfoamed state to The foamable layer having the characteristics of the foamed state, the other of the first layer and the second layer is an optical element. |