Transducer Concepts Flashcards
0
Q
Far/Fraunhofer field
A
The region past the focus
1
Q
Near/Fresnel field
A
The area between the face of the transducer and the beam focus
2
Q
Focus
A
Where the beam reaches its minimum diameter
3
Q
Focal region (depth of field)
A
Region over which the beam is most tightly focused
4
Q
Detail resolution
A
Ability to distinguish between two objects in any of the three dimensions: axial, lateral, or elevation
5
Q
Operating frequency (f0)
A
The center frequency of the transmit bandwidth
6
Q
F0 (pulsed mode)
A
Determined by crystal thickness and speed of sound in crystal material
= c / 2*thickness
7
Q
F0 (continuous mode)
A
Determined by the frequency of the drive (transmit) voltage
