| 摘要 |
PURPOSE:To omit a Fresnel lens to reduce the trouble and the cost for maintenance, by irradiating a light irradiation face uniformly with luminous fluxes from plural light sources, which are provided with reflective mirrors, through an aperture plate and a light absorbing layer. CONSTITUTION:Luminous fluxes emitted from unit light emitting lamps 11-14 with reflective mirrors arranged on a lamp supporting plate 2 are shed uniformly onto a light irradiation face 15 through apertures 121-124 of an aperture plate 11, which is provided with radiation fins 14, and a light absorbing layer 13. Since the Fresnel lens is not used, the trouble and the cost for maintenance are reduced. |
