| 摘要 |
PURPOSE:To simulate the spectral distribution from the ultraviolet to visible range by employing two kind of fluorescent lamps for specific visible wave range and ultraviolet wave range then mixing their lights to produce daylight regulated by CIE. CONSTITUTION:A fluorescent lamp 1 coated with mixture of bivalent europium activated barium halo-phosphate.calcium.magnesium phosphor substance and tin activated strontium phosphate.magnesium phosphor substance and another fluorescent lamp 2 coated with mixture of lead activated barium silicate.strontium. magnesium phosphor substance or lead activated barium silicate.strontium phosphor substance and tungstic acid calcium phosphor substance are combined as a light source. Here the ratio of light flux produced from said lamps 1 and 2 is made in the range of 99.5:0.5-95.0:5.0. A plurality of said lamps 1 and 2 are arranged alternatively at the upper inside of a box 3 to disperse the light from said lamps 1 and 2 uniformly through a dispersion board 4 to irradiate the specimen viewing section 5. |
