| 摘要 |
PURPOSE:To obtain a glass delay line with spurious attenuation by fitting an input and an output transducer to the input and output surfaces of a glass delay line element with slight shift from their center parts. CONSTITUTION:The glass delay line is provided with the glass delay element 1 and the input and output transducers 2 and 3 fitted to the input and output surfaces 1a and 1b formed of both-side slanting surfaces of the element 1. The input and output transducers 2 and 3 are fitted slightly shifting from the center parts of both surfaces. Plural spurious absorbers 5 for specifying a beam spread of a signal are provided to both surfaces of the delay element 1 along paths of a normal signal converted into ultrasonic oscillation by the input transducer 2. Consequently, the largest spuriousness is attenuated to the amount of oscillation that an equipment, etc., require. |
