Flexible passive optical pressure sensor

The invention discloses a flexible passive optical pressure sensor which comprises a force sensor film layer, a photonic crystal microstructure layer and a transparent flexible film layer which are sequentially bonded and fixed from bottom to top, and a photonic crystal pattern is arranged on the top surface of the photonic crystal microstructure layer. A flexible packaging supporting structure is arranged between the force sensor film layer and the transparent flexible film layer, the photonic crystal microstructure layer is arranged in an inner cavity of the flexible packaging supporting structure, and the height of the photonic crystal microstructure layer is not larger than that of the inner cavity of the flexible packaging supporting structure. According to the invention, the change condition of pressure can be directly and intuitively mastered in real time by directly observing the color change of the sensor, and the problem of pressure data delay caused by data transmission analysis is avoided. 本发明公开了一