The sensor consists of a lithium tantalate pyroelectic
detector mounted in an aluminum housing. The detector is
a 1mm diameter octagon configured in a voltage follower
circuit. This circuit consists of the pyroelectric crystal
connected to a JFET, with a 1x10Ell ohm source resistor.
A lens designed for use in the 14um to 16um spectral
band is mounted in the housing.