1. Sample Introduction

The samples tested in this study are the plastic components on electronic parts.

2. Test Objective

3. Test Equipment & Methodology

• Measurement Device: Hyperspectral color measurement equipment was used for the test.

• Spectral Range: The hyperspectral camera covers a wavelength range of 400–1000 nm.

• Imaging Scheme: A linear push-broom imaging method was adopted.

• Illumination Source: A strip halogen light source was used.

• Equipment Structure: The device features a darkroom design, with samples placed on the stage inside the darkroom.

• Lab Calculation Parameters: A 2° viewing angle and D65 light source parameters were applied for Lab color space calculation.

• Sample Positioning: Samples were placed on a horizontal translation stage and moved at a constant speed during testing.

Spectral Curve

Lab Values

Test Result: OK: Indicates that the calculated ΔE (color difference) of the current selected area is less than 0.5.

Test Result: NG: Indicates that the calculated ΔE (color difference) of the current selected area is greater than 0.5.

0–1: Color difference is almost imperceptible to the human eye.

1–2: Only trained personnel can detect subtle differences.

2–3: Even untrained personnel can perceive slight color differences.

3–6: Obvious color differences are visible.

6–12: Intense color differences are present.

>12: The colors are completely different.