Infrared radiation intensity measuring appts. - has infrared detector on Peltier cooling element connected to constant current source and amplifier controlled by Peltier element voltage drop

摘要

The appts. includes an infrared detector (14) with two outputs (16, 18). Each output is associated with a signal voltage connection (20, 22). The detector is mounted on a Peltier cooling element (24). The Peltier element is connected to a constant current source (26). The control parameter of an amplifier circuit (28) connected between one of the outputs and the corresp. signal voltage connection is the voltage drop across the Peltier element. USE/ADVANTAGE - For measuring e.g. laser intensity. Very simple design; compensates temp. dependency of detector mounted on Peltier element without need for special temp. sensor.