method for reducing the sensitivity of an ultrasonic delay line is climate change, and delay line according to process fabriquee ultrasonic

摘要

1327624 Acoustic delay lines LICENTIA PATENT-VERWALTUNGS-GmbH 26 Oct 1970 [25 Oct 1969] 50727/70 Heading H3U The glass body of a delay line having input and output transducers 1, 2 has its major surfaces 4, 5 substantially totally reflecting and to reduce the sensitivity of these surfaces to moisture and temperature they are subjected to a chemical etching treatment. The entire body may be subjected to the treatment carried out by application of an acid, the transducers 1, 2 being protected by a suitable coating.