Extensive Product Testing

Thermal deflection testing assesses the angular stability of mirror mounts under controlled temperature cycling, simulating real-world conditions that may cause mechanical stress and misalignment in pitch and yaw. The test quantifies two metrics:

• Drift: the peak angular deviation during thermal exposure
• Shift: the residual angular offset after returning to ambient temperature

These measurements help OEMs assess a mount’s ability to maintain alignment in thermally dynamic environments and ensure long-term system stability.

The mirror mount is placed in a temperature-controlled chamber and aligned to a reference. It undergoes thermal cycling between 20°–30° C with a defined ramp rate and hot soak, followed by cooling. An autocollimator tracks angular deviations throughout each cycle. Multiple runs are conducted to assess repeatability and thermal stability.

The mount’s thermal response is characterized by the results of the test including the angular drift at elevated temperatures and residual shift after the test is complete. Lower microradian deviation across thermal cycles reflects a mount’s ability to maintain alignment under temperature changes from active use, ambient shifts, or shipments. This test helps OEMs qualify components for thermally dynamic environments like airborne payloads, semiconductor tools, and satellite subsystems where long-term stability is required.

Mechanical stability testing evaluates the integrity of optical mounts under both dynamic (vibration) and static (load) conditions. These tests simulate real-world mechanical stress encountered during transport, operation, or installation where vibration can induce misalignment.

• Vibration Testing: The mount is installed on a slip table with a beam source and detector. After alignment and torque verification, a vibration profile is applied (e.g. random, sine sweep, shock). Beam displacement is tracked before, during, and after excitation to assess angular stability and residual shift
• Static Load Testing: The mount is aligned on an isolated table, and a calibrated vertical load is applied. Beam position is monitored over time (before, during, and after loading) to evaluate angular shift and stability as displacement plateaus

Peak angular deviation, residual shift, and resonance frequency are among the key metrics obtained through these tests. Mounts with minimal movement are ideal for precision systems in aerospace, mobile platforms, and industrial tools. These tests help OEMs qualify components that maintain alignment and reduce recalibration in highly dynamic environments.

Wavefront distortion analysis evaluates how optical mounts and assemblies affect beam quality by measuring deviations from an ideal wavefront. This test is critical for OEMs developing high-precision systems—such as imaging optics, laser delivery platforms, or metrology tools—where even minor aberrations can degrade performance. It identifies distortions caused by mechanical stress, misalignment, or surface irregularities to ensure components meet stringent optical specifications.

A coherent light source is directed through or reflected off the test component, and the resulting wavefront is captured (Peak-Valley relative) using an interferometer or wavefront sensor. The mount is tested under baseline and stress conditions (e.g., torque, thermal variation, or static load). Deviations from the reference wavefront are analyzed using RMS error metrics or Zernike polynomials to characterize optical aberrations.

Results include wavefront error maps, RMS distortion values, and dominant aberration modes. Components with low distortion under stress are suitable for integration into systems requiring high beam fidelity and optical precision. This test helps OEMs validate optical integrity, reduce system-level error sources, and ensure consistent performance across operational conditions.