| 摘要 |
The temperature detected by a thermistor (23) when the optical axis in a spectroscope (3) is stable while the light source (5) is illuminated is stored in a storage means (27). When the light source (5) is turned on from an off state, the control unit (29) activates a heater (25), and the control unit (29) stops a fan (21). As a result, the spectroscope (3) is heated by the heat from the lamp housing (1), and is also heated by the heater (25). When the temperature detected by the thermistor (23) reaches the detected temperature stored in the storage means (27), the control unit (29) stops the operation of the heater (25), thereby stopping the heating of the spectroscope (3) by the heater (25), and the fan is operated at a predetermined speed in such a manner that the temperature of the lamp house (1) is stabilized. |
