Chengdu Yafei Optical Instrument Factory Quality Control

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Chengdu Yafei Optical Instrument factory has strong R&D capability, good service and high quality products, which is worthy of long-term cooperation.

—— Mr. Fang

This lens is very good with unique design and good service, we'd love to continue to buy.

—— Mr. Yang

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QC Profile

Yophy Filter has a Quality Control System


Yophy filter is committed to meet all customer requirements and specification, as well as to comply with all statutory and regulatory obligations, through continuous improvement of quality management.
Filters are tested and evaluated throughout the manufacturing process. Spectrophotometer and other measuring instruments are calibrated and maintained to meet the requirements of our quality control.


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.












Contact Details
Chengdu Yafei Optical Instrument Factory

Contact Person: Ms. Wang

Tel: 15982072178

Fax: 86-28-8584-4435

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