Technology of double parallel pyroelectric detector

Pyroelectric infrared detectors are efficient and cheap sensors for many applications. In order to acquire a common optic mode rejection capability, the double serial or parallel construction of active electrodes has been employed. The latter type is difficult to construct due to connection between the electrodes. The usual solution is to mount the two separate thin crystalline active elements on the separate holders. This technique lacks uniformity and precise cancellation of common mode. We have found the way to construct and fabricate the double parallel detector formed on a single piece of thin pyroelectric material. In this paper we describe the technology as well as the results of the detector parameter measurements.