Abstract
Two types of the optical indicators with light reflection and diffraction were proposed and verified. The thermal magic mirror used the light reflection. The thermal magic mirror indicates variation of the temperature as a sign visualized by light reflection pattern which changed with thermal expansion of microstructure on the device. In the experiment, the thermal magic mirror showed the sign on a screen above a specific temperature level. The holographic indicator is the diffraction type optical indicator. Test hologram was fabricated by computer-generated hologram and MEMS processes. Also, principle of holographic indicator was proposed and simulated by computer-generated hologram. If the holographic indicator was stretched by physical external force, the holographic image was changed to blurred image.
