| 摘要 |
PURPOSE:To obtain a lighting apparatus which stabilizes a quantity of light of a light source eventually by detecting an ambient temperature of a fluorescent lamp to keep the ambient temperature constant. CONSTITUTION:This apparatus consists of a light source 2 arranged inside a case body 1, a heating means 3 to raise temperature in the case body 1, a cooling means 4 to lower the temperature in the case body 1, a temperature sensor 5 to detect the temperature in the case body 1 and a control mean 6 which regulates the driving of the heating means 3 and the cooling means 4 based on the temperature detected of the temperature sensor 5 to a keep a quantity of light from the light source 2 constant indirectly with the control of the temperature in the case body 1 to a specified value. |
