透影：異なる波長の赤外光を用いた不可視影の多重化

This paper proposes a multiplexing invisible shadow system named “Touei”, which intends to achieve an “ex-formation” of shadow. The proposed system uses infrared lights each of which radiate a certain wavelength of infrared light, and an object on which two kinds of IR filters are attached. By emitting the light to the object, the object’s shadow appears, then the shape of the object changes to a different shape in accordance with the wavelength of the radiated infrared light. With this system, a user is expected to obtain a different recognition about shadow.