Displacement sensor, and displacement measurement system using displacement sensor

A displacement sensor comprising:

• a first emission particles layer provided to be contactable with a measurement object and in which first emission particles emitting light at a first wavelength by excitation energy are distributed over at least a one-dimensional extent;
• a second emission particles layer in which second emission particles emitting light at a second wavelength different from the first wavelength by the excitation energy are distributed over the one-dimensional extent;
• a first spacer layer that separates the first emission particles layer and the second emission particles layer in a direction intersecting the one-dimensional extent, wherein the first spacer layer includes an excitation energy absorbent that absorbs the excitation energy;
• a third emission particles layer in which third emission particles emitting light at a third wavelength different from the first wavelength and the second wavelength by the excitation energy are distributed over the one-dimensional extent;
• a fourth emission particles layer in which fourth emission particles emitting light at a fourth wavelength different from the first wavelength, the second wavelength, and the third wavelength by the excitation energy are distributed over the one-dimensional extent;
• a second spacer layer that separates the third emission particles layer and the fourth emission particles layer in the direction intersecting the one-dimensional extent;
• and
• an energy movement inhibition layer that separates the second emission particles layer and the third emission particles layer in the direction intersecting the one-dimensional extent,
• wherein the first emission particles layer, the first spacer layer, the second emission particles layer, the energy movement inhibition layer, the third emission particles layer, the second spacer layer, and the fourth emission particles layer are sequentially laminated.