PURPOSE: To unify the color of the light radiated from a glass tube by assembling multiple monochromatic fluorescent lamps in the glass tube coated with a diffusion film with a specific thickness on the inner face, and flash-controlling them from the outside.
CONSTITUTION: Fluorescent lamps 3 independently coated with red, green, and blue phosphors are assembled along the axial direction glass tube 1 coated with a diffusion film 2 with the thickness of 4-40mg/cm2 on the inner face. When two or three lamps 3 are concurrentry lighted by an external flash control device, the light radiated from the lamps 3 is uniformly mixed by the film 2 coated on the inner face of the tube 1, and the homogeneous luminescence color is obtained. the thickness of the film 2 is 4-10mg/cm2 or below, the light coin is not sufficiently mixed. If it is 10mg/cm2 or above, the absorption of the radiation light is increased, and the light quantity is reduced. The color of the light radiated from the glass tube 1 can be made homogeneous.
MATSUMURA TAKESHI
ARAKI TSUNETAKA
