Acoustic Levitation & Phased Array CAM Guide
Master the design, transducer array PCB layout, and acoustic phase mask vectorization for contactless acoustic levitation and ultrasonic tweezers.
1. Contactless Acoustic Manipulation & Trapping
Acoustic levitation enables the contactless handling, containerless chemical synthesis, and precision micro-assembly of delicate components ranging from $10\,\mu\text{m}$ biological cell spheroids to $5\,\text{mm}$ electronic chips and liquid pharmaceutical droplets. By utilizing destructive and constructive interference from high-frequency phased transducer arrays, dynamic 3D acoustic potential wells can be steered continuously along programmed CAM trajectories.
2. Array Geometry & Anti-Grating Lobe Rules
To steer acoustic focal traps dynamically without generating unwanted ghost nodes (grating lobes) that drop levitated specimens, the transducer element layout must follow strict spatial sampling criteria:
| Operating Medium | Frequency ($f$) | Wavelength ($\lambda$) | Max Element Pitch ($P_{\text{max}}$) |
|---|---|---|---|
| Air (Ambient STP) | $40\text{ kHz}$ | $8.58\text{ mm}$ | $\le 4.29\text{ mm}$ (Half-Wavelength) |
| Air (High Precision) | $80\text{ kHz}$ | $4.29\text{ mm}$ | $\le 2.14\text{ mm}$ |
| Acoustofluidic (Water) | $1.0\text{ MHz}$ | $1.48\text{ mm}$ | $\le 0.74\text{ mm}$ |
| Surface Acoustic Wave (LiNbO₃) | $20.0\text{ MHz}$ | $0.199\text{ mm}$ | Interdigital Transducer (IDT) Finger $\lambda/4$ |
3. CAM Vectorization for Phase Holograms & IDT Electrodes
In acoustofluidics and surface acoustic wave (SAW) micro-devices, Interdigital Transducer (IDT) electrodes are photolithographically patterned onto piezoelectric substrates (e.g., $128^\circ$ Y-cut Lithium Niobate). SpotItLive converts raster acoustic hologram phase maps into ultra-clean 1-bit vector phototool masks with sub-micron finger width tolerances.
Convert Toolpaths & Prepress Artwork with SpotItLive
Vectorizing micro-machining profiles, toolpath offsets, and CAM geometries requires sub-pixel curve fidelity. Order a vector pack today to transform raster drawings into production-ready DXF and SVG files.