なぜレーザーモジュールでスポットのずれや焦点の不安定が発生するのか？

Problem Description

During laser module operation, if the beam spot drifts or the focus changes over time, it often indicates minor deviations in the optical axis or lens position. This can affect projection, distance measurement, and display performance.

Common Causes

Possible causes of beam shift include

• Loosened module mounting structure or displacement due to vibration.

• Lens deformation caused by thermal expansion altering the optical axis angle.

• Aging or detachment of optical adhesive affecting focal distance.

• Long-term use leading to internal lens assembly misalignment.

Improvements and Preventive Measures

1. Ensure the laser module is securely fixed to minimize external vibration effects.

2. Control internal system temperature to reduce thermal expansion and optical axis drift.

3. Regularly inspect beam shape and focus; recalibrate immediately if deviation is detected.

4. Use materials with high heat resistance and low deformation coefficient for module mounting.

Summary：
Beam stability depends on structural rigidity and temperature control.
Good mechanical design and regular optical alignment checks help ensure long-term stable output.