| 摘要 |
<p>PURPOSE:To make an incoherence visible light emit light by excitation of infrared light having about 0.82mum wave length, by using a substance having a fluoride as a base body and allowing trivalent Er ion of specific atomic percent of total cation to contain, as a wave length conversion material. CONSTITUTION:Primary array of semiconductive laser 3 is formed with a semiconductive laser 1 as an infrared light source having an oscillation wave length to 0.82mum consisting of a GaAlAs three-way system together with the same semiconductive laser 2 etc. An infrared light 4 of oscillation output of the semiconductive laser 1 is converged to a small crystal piece 7 of an infrared visible wave-length converting element housed in a vessel 6 through a ''SELFOC '' lens 5. This small piece 7 has YF3, BaY2F8, NaYF4 or LaF3 being a fluoride as a base body and is a wave length conversion material allowing trivalent Er ion of 5-20 atomic percent of total cation to contain and has the composition as BaY1.4Er0.6F3 and is excited by excitation of the infrared light 4 having around 0.82mum wave length to generate red, green or yellow intensive visible light in accordance with the condition.</p> |
