Knowledge Bank

A high sensitivity, chemically deposited, lead sulfide detector has been developed under a program sponsored by the Bureau of Ordnance, Department of the Navy. The end product of this development has been declassified and the commercial production of these units under the trade name of Kodak Ektron Detectors has been initiated. The following properties characterize these Kodak Ektron Detectors. 1. High sensitivity: $10-4$ V. per microwatt $500\circ$ K radiation per square cm. 2. Low noise: $3\times 10-7V$. for a 20 cycle bandwidth. 3. Time constant sufficiently short to give excellent response up to 800 cycles. 4. Useful spectral response from 0.3 to 3.0 microns at room temperature with an increase in the near infrared on cooling. The peak response lies in the 2 micron region. 5. Impedance range of 1/4 to 3/4 meg. per square, or 10 to .01 meg. depending on electrode configuration. 6. Sensitive areas from .25 square mm to several square cm in nearly any shape including square, rectangular, circular, annular and radial in single or multiple array. The versatility of these detectors makes them ideal for many types of instrumentation, from the finest spectrophotometers covering the ultraviolet, visible and near infrared regions to the simplest inspection and monitoring devices.