Optical & Lens Module Airtightness Testing Solutions
Optical / Lens Modules
Airtightness Testing for Optical Lens Assemblies, Camera Modules & Precision Optics
Optical assemblies fail in the field not from glass breakage but from fogging — moisture ingress past a compromised adhesive or gasket seal. Figurtech's micro-volume differential pressure systems validate the airtightness of lens modules, camera housings, and precision optical assemblies at ±0.5% repeatability, at production-line speed.
The Manufacturing Challenge
Optical lens modules present the most demanding combination of constraints in leak testing: extremely small internal volumes (often under 1 mL), tight leak specifications to prevent fogging, fragile assemblies that cannot tolerate over-pressurization, and high-throughput multi-unit pallets requiring simultaneous testing. Standard instruments designed for automotive or electronics are too coarse to reliably detect the relevant leak rates.
- Smartphone and tablet camera modules: adhesive seal, gasket, and lens mount integrity
- Surveillance and security camera housings: IP-rated enclosure plus optical interface seal
- Automotive camera and LiDAR sensor modules: thermal cycling and vibration-resistant sealing
- Medical endoscope optics: fluid ingress prevention in sterilization environments
- Industrial machine vision lenses: dust and humidity exclusion, long service life
Recommended Instruments
| Series | Best for | Key capability |
|---|---|---|
| LM Series | Multi-unit lens module pallets | 4-channel simultaneous, micro-volume fixture, ±0.5% repeatability |
| LD Series | Single-station precision validation | 0.01 kPa differential resolution, noise rejection, low-pressure capable |
| LY Series | Ruggedized optical housings at higher pressure | 0.1 Pa resolution, wide pressure range for IP-rated camera enclosures |
Typical Applications
- Smartphone camera module (4-channel): LM 4-channel simultaneous test, micro-volume fixture nest, 10-second cycle — 100% inline on assembly conveyor
- Surveillance camera housing: LD differential pressure, IP66-equivalent airtightness validation, low-pressure (30–50 kPa) with noise rejection
- Automotive LiDAR module: LY direct pressure, combined optical interface and housing seal test, traceable per-unit data for automotive quality systems
- Medical endoscope tip: LD sub-SCCM test at 20 kPa, custom soft-contact fixture to protect optical surface
- Machine vision lens assembly: LM 2-channel, batch test of finished lens pairs before shipment to integrators
Why Figurtech for Optics?
- Micro-volume fixture expertise: Custom nests for sub-milliliter optical cavities, soft-contact seals that protect coated surfaces
- ±0.5% repeatability: Achieved and documented on optical lens module production lines — not a datasheet claim
- 4-channel simultaneous throughput: Test four modules per cycle from one instrument — matches assembly conveyor speeds
- Low-pressure precision: LD bridge compensation detects micro-leaks at pressures as low as 10–20 kPa without environmental interference
- Calibrated standard leaks supplied: Fixture validation package includes calibrated leak holes at your specified leak rate
Working with sub-milliliter volumes or multi-unit pallets? Share your module geometry and leak specification — our engineers will propose a fixture and instrument configuration.
Request an Engineering Evaluation →