| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermal function device of higher thermal reaction speed at lower price and smaller size. SOLUTION: When an infrared ray is irradiated toward a diaphragm 2, a heat is generated to increase the output of a thermoelectric conversion element 4. Since a reference thermoelectric conversion element 5 is not irradiated with infrared ray, an output signal does not change. A difference between both outputs is detected at a calculation amplifier 19, which is amplified and outputted as a compensation signal. The compensation signal is supplied to a measuring device 21 through a noise filter 20. The measuring device 21 calculates the infrared ray irradiation amount and heating amount of the diaphragm 2 from the compensation signal. At the same time, the compensation signal is supplied to a thermoelectric conversion means 3. Supplied with the compensation signal, the thermoelectric conversion element 3 so operates as to cancel the energy application to the diaphragm 2, resulting in a constant temperature.
|
