| 摘要 |
PURPOSE:To improve analyzing accuracy, by forming an incidence slit of an exciting side spectroscope long in a horizontal direction and also, making the center of curvature of the reflection surface of a post-condensing mirror to coincide with a central position of a spot of a xenon lamp. CONSTITUTION:Light from a bright point spot 4 emitted between an anode 1 and a cathode 2 of a xenon lamp 9 is reflected to a troidal mirror 7 removing astigmatism and is made incident to an incidence slit 10. A reflected image of the spot 4 is formed overlapping at the position of the spot 4 because a post- condensing mirror 8 is disposed behind the lamp 9 and the center of a curvature radius of its reflection surface is made to coincide with the spot 4. In this manner, the variation of light quantity introduced into a spectroscope is reduced substantially even when the bright spot 4 of the lamp 9 is moved transversely left and right. |
