Modulation type pyroelectric IR detector

• Published in: Japanese Journal of Applied Physics Vol. 26; no. 7; pp. 1082 - 1087
• Main Authors: YOKOO, T, SHIBATA, K, TAKEUCHI, K, TANAKA, T, KAMINO, M, NAKANO, S, KUWANO, Y, TSUJI, M, IKEDA, M, YAMADA, Y
• Format: Journal Article
• Language: English
• Published: Tokyo Japanese journal of applied physics 01-07-1987
• Subjects: Bolometer; infrared, submillimeter wave, microwave and radiowave receivers and detectors; Exact sciences and technology; Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Physics; Radiation detector; Beam chopper; Output voltage; Solid state device; Wave modulation; Theoretical study; Pyroelectric device; Infrared radiation; Experimental study; Signal to noise ratio
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/jjap.26.1082

We have developed a new type of pyroelectric IR detector which contains a sensing part and a solid state chopper with two bimorph vibrators and two slit plates in the same package. This new detector (M-type IR detector) features high reliability, small volume and low electric power consumption compared with conventional pyroelectric IR detectors using a rotating chopper.
The output voltage and noise voltage of the M-type IR detector have been investigated theoretically and experimentally. It was confirmed that a good performance can be achieved in the M-type IR detector by optimizing the relative position of the two slit plates and the aperture diameter of the shield box.