Patent ID: 6203725
Filing Date: 2001-03-20
Classification: C09K

Abstract:
An optically controlled traveling system, a source of light and a traveling vehicle wherein the system comprises a film on a surface and the traveling vehicle is provided with a detector which controls the direction of travel of the traveling vehicle by detecting emitted light from the film which originates from the source of light wherein the film comprises a luminescent compound which has a minimum luminescent wavelength end (A nm) and an irradiation light source which emits a light having a maximum irradiation wavelength end (B nm), wherein the minimum luminescent wavelength end A is defined as a wavelength which has a strength which is one-twentieth of the maximum luminescence energy strength, the maximum irradiation wavelength end B is defined as a wavelength which has a strength which is one-fifth of the maximum irradiation light energy strength and the difference between A and B satisfies the following formula (1):A-B.gtoreq.150 nm (1)wherein the luminescent compound is used in a resin composition with a resin and the resin composition in the form of a film is used as a molded resin material which is obtained by molding thereof.