INFRARED TEMPERATURE MEASURING APPARATUS

摘要

PURPOSE:To detect infrared rays without use of any mechanical means by controlling a synchronous rectifier and a voltage-controlled photophysical transformation element interposed between material to be measured in temperature and an infrared rays sensor with a voltage modulator. CONSTITUTION:Infrared light from material to be measured in temperature is interrupted with a voltage-controlled photophysical transformation element 2 and then, enters an infrared ray sensor 3. The photophysical transformation element 2 is controlled by a voltage modulator 4. An output voltage of the infrared ray sensor 3 is amplified with an amplifier 5 and subjected to a synchronous rectifier 8 comprising a switching means 6 and an impedance converter 7. The switching means 6 is controlled with the voltage modulator 4.