| Transducer |
Operates by: |
Is it steered? How? |
Is it focused? How? |
Image shape |
Electronic or Mechanical? |
| Linear sequenced array |
sequencing |
no |
no – fixed focus |
rectangle |
Electronic |
| Curved sequenced array |
sequencing |
yes – transducer shape/element arrangement |
no – fixed focus |
“blunted” sector |
Electronic |
| Phased linear array |
sequencing |
no |
yes – phasing |
rectangle |
Electronic |
| Phased curved array |
sequencing |
yes – transducer shape/element arrangement |
yes – phasing |
“blunted” sector |
Electronic |
| Vector |
sequencing |
yes – phasing |
yes – phasing |
“flat top” sector |
Electronic |
| Linear phased array |
phasing |
yes – phasing |
yes – phasing |
“pointed” sector |
Electronic |
| Annular array |
phasing |
yes – mechanically |
yes – phasing |
“notch” sector |
Electronic (with a mechanical reflector for steering) |
| Oscillating Element |
mechanical means |
yes – element movement |
no – fixed focus |
notch sector |
Mechanical |
| Rotating group of elements |
mechanical means |
yes – element movement |
no – fixed focus |
notch sector |
Mechanical |
| Oscillating reflector |
mechanical means |
yes – reflector movement |
no – fixed focus |
notch sector |
Mechanical |
| Linearly translating element |
mechanical means |
no |
no – fixed focus |
rectangle |
Mechanical |
Science Vocab 147928
