JPS5719728A - Additive color light source device - Google Patents

Abstract

PURPOSE:To eliminate uneven colors on a printed surface by allowing condensed three primary color light to enter a luminous flux guide body consisting of fine fiber aggregate of tens of thousands to hundreds of thousands of fibers, and obtaining uniform additive color light in an exit part through irregular reflection in the respective fibers. CONSTITUTION:The luminous flux from a light source 2 is toned to three primary color light by means of a dichroic mirror DM, dichroic filters 31-33, light valves LV1-LV3, and condenser lenses CL1-CL4 and this light is conducted to an exit part S. This has a characteristic in that the light is passed through a luminous flux guide body 6 in the part S. The position of the body 6 may be just before the condenser lens CL4 for final condensing or between the same and a opposite condenser lens 7 or it may be disposed on the exit side thereof. The entered three primary color light repeats total reflection in the single fibers of an optical glass fiber and the angles of exit light are at random at the outlet thereof. The respective fibers may be aligned or twisted.