Vibration and Shock for Optical Alignment
Optical durability requires the lens, mounts, fasteners, adhesives, PCB, sensor, windows, and enclosure to preserve functional alignment through the real shock and vibration spectrum. Static strength is insufficient; resonance, preload loss, slip, adhesive fatigue, fretting, and cable forces can change boresight or focus.
Why this decision matters
This choice affects more than nominal optical performance. It changes package volume, tolerance sensitivity, supplier options, alignment effort, calibration, test equipment, production yield, and the evidence required before release. The correct answer therefore comes from the complete operating condition and acceptance method, not from a single catalog value.
Key engineering decisions
- Translate product loads into optical alignment limits.
- Identify resonant and frictional interfaces.
- Design measurable pre- and post-test states.
These decisions should be captured in a requirement or trade study before the team commits long-lead components. Where requirements conflict, rank the product priorities explicitly so optimization does not hide a business decision.
Specification checklist
- Shock and vibration spectra
- Optical alignment limits
- Mount and fastener details
- Mass properties and modes
- Temperature and life cycles
Every value should state the condition where it applies and how it will be measured. A specification without a defined test condition is not yet an acceptance requirement.
Common failure mode
The assembly survives mechanically but shifts optically because a small datum slip or sensor-board motion is below structural damage thresholds.
The practical remedy is to compare the nominal model, tolerance prediction, mechanical interfaces, and measured configuration together. Treating the symptom as an isolated lens or component problem often produces another build with the same system-level limitation.
Verification approach
Measure wavefront, MTF, focus, boresight, and calibration before, during where possible, and after axis-specific loads and thermal conditioning.
Record the hardware revision, source or scene, wavelength, aperture, field point, focus or alignment state, environmental condition, processing, and measurement uncertainty. This makes the result useful for design iteration and supplier transfer rather than only for a one-time demonstration.
What to send PAO
Send load profiles, optical and mechanical models, mounting, mass, alignment budget, existing modal or test data, and observed shifts.
PAO applies this framework through automotive LiDAR and HUD optics, from requirements and architecture through detailed design, prototype evidence, and manufacturing transfer.