| 摘要 |
PURPOSE:To improve energy efficiency by enclosing at least one of pumping light source and laser medium with a doped quartz glass tube. CONSTITUTION:An least one of pumping light source 2 and a laser medium 1 is enclosed with a doped quartz glass tube 5. Light whose wave length is shorter than 600nm of light projected from a xcenon flash lamp 2 is cut by the transmission through the chromium doped quartz glass tube 5 and the luminance in a wavelength range of 600 to 850nm is doubled. Furthermore, the YAG rod and quartz glass tube which is doped chromium are not deteriorated by solarization even if used for a long time. Energy efficiency can be improved in this way. |
