Yophy Filter has a Quality Control System

The Metrology & Testing Capabilities

1. Spectrally Resolved Measurements of Transmission, absorption(optical density) reflectance

1.1 Transmittance Inspection: using spectrophotometer for spectral curves of filter.

1.2 Using A3 resolution test target(GB) and 500mm collimator for identifying resolution of substrate.

2. Optical coating inspection

2.1 Hydrophobicity inspection: using water contact angle tester to determine the hydrophobicity of filter surface.

2.2 Surface hardness test: using Mohs scale of mineral hardness for measuring the hardness of filter surface.

2.3 Ball-drop test: using falling ball impact tester for evaluating the impact resistance of filter.

3. The Surface Quality

3.1 Appearance inspection (to check is there any scratch and blemish on the surface of filters): using 100 watts projector lamp to determine the surface grade of the glass substrate.