The Pyrocam detector consists of a LiTa03 pyroelectric crystal mounted with indium bumps to a solid-state readout multiplexer. This sensor, developed for the original Pyrocam I, has proven to be the most rugged, stable, and precise IR detector array available. Light impinging on the pyroelectric crystal is absorbed and converted to heat, which creates charge on the surface. The multiplexer then reads this charge onto the video line. For use with short laser pulses, the firmware of the camera creates a very short electronic shutter to accurately capture the thermally generated signal.
The Pyrocam III measures the beam profile of both pulsed and CW lasers. Since the pyroelectric crystal is an integrating sensor, pulses from femtosecond to 12.8ms can be measured. The pyroelectric crystal only measures changes in intensity, and so is relatively immune to ambient temperature changes.
Because CW laser beams must be chopped to create a changing signal, the Pyrocam III contains an integral chopper as an option.
The Pyrocam III is an essential tool in the maintenance of industrial infrared lasers, especially CO2. The beam profiler replaces non-electronic mode burns and acrylic blocks by providing higher definition electronic recording of data and analysis of short-term fluctuations.
The NanoScan is a slit-based profiler that can be equipped with silicon, germanium, or pyroelectric detectors. With the pyroelectric detector, the NanoScan can measure lasers of nearly any wavelength. The system comprises a drum with two orthogonal slits that rotates at software controllable rates from 1.25 Hz to 20 Hz. The pyroelectric sensor is a single element detector that responds to the light passing through the slits, generating a beam profile of the x and y axes of the beam.