Screen Panel Flatness Measurement

Electronic product manufacturing requires high precision inspection to ensure tablet screen panels are installed correctly and function reliably. Manufacturers use spectral confocal displacement sensors to measure panel flatness, ensuring the quality and durability of touchscreens. This application utilizes a point spectral confocal sensor to achieve high repeatability and accuracy across various materials.

I. Inspection Requirements

• Product Name: Screen Panel

• Product Size: 35 mm x 14 mm x 2 mm

• Measurement Item: Flatness

• Accuracy Requirement: Flatness repeatability 0.01 mm

II. Measurement Process

The measurement process involves setting nine distinct points on the screen panel. The SC10015 point laser records the X, Y, and Z values for each point to calculate overall flatness.

• Measurement Result: During 10 dynamic measurements using the SC10015, the system achieved a flatness repeatability of 0.009 mm, exceeding the required standard.

III. Sensor Selection

The SC10015 model was selected for its specific technical capabilities in high precision electronic inspection.

• Point Spectral Model: SC10015

• Spot Size: 19.2 μm / 40.3 μm

• Measurement Range: 10 mm

• Angular Characteristic: ±15°

• Numerical Aperture: 0.26

• Working Distance: 40 mm

• Axial Resolution: 0.012 μm

• Linearity: ±0.01% of F.S.

  SinceVision independently developed SC series spectral confocal displacement sensors. These sensors offer high cost performance and strong angular characteristics, with a maximum detection angle reaching up to ±60°. This allows the system to manage measurement blind spots and inspection challenges across diverse material types effectively.