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Quality System

Our production capabilities, together with in-house quality control and a metrology laboratory let us offer top-notch quality and repeatability for each product we ship.

Our goal is to ensure that after fabrication, every element passes the final steps of quality testing, such as those relating to shape, surface quality, surface figure, dimension tolerances, parallelism, and spectral characteristics.

We believe that quality control is the most important aspect of all steps in the production of optical components, whether the component is used in a simple optical or complex industrial system. LIWANOPTICS cares about your success in experiments, the performance of products, and excellence in quality.

Quality Assurance

As an ISO 9001 certified company, LIWANOPTICS integrates international standards from technical documents to quality control. We have passed internal and external audits and continuously introduce improvements to enhance customer satisfaction. Our quality policy: well organized, strictly regulated, take quality as the permanent basis, construct LIWANOPTICS to be the first-class international optical enterprise.

Indoor testing equipment

Interferometer zygo Verifire XP/Z
Multi-function test station
Fully automated optical bonding station
UV-visible-near-infrared spectrophotometer
Infrared fourier spectrometer
J.A.Woollam Ellipsometer M-2000V

Inspection of light source and method

Triple UV analyzer
cold light source
Inspection Workshop
Cold light source and magnifying glass inspection
microscopical Inspection

Grinding and coating

processing workshop
processing workshop
processing workshop
Optical control coating
Planetary Control Ensures Uniformity
RF Ion Source Ensures Film Quality

cleaning room

The production workshop of Liwan Optics is classified as Class 10000 (according to ISO 14644-1 standard) and has implemented a series of strict control measures to ensure that particulate matter in the air is minimized, thereby reducing the impact on the manufacturing process of optical components.


LIWANOPTICS always implements the ISO 9001 quality management system standard to ensure that good quality control measures are taken in every production process. At the same time, LIWANOPTICS adheres to the management philosophy of safety and environmental protection and the business policy of sustainable development, and has established systematic and standardized environmental management measures.

The certificate is publicly announced as follows:

National certification and honors

International Standards

Currently below international standards are extensively applied to technical and quality control of every production procedures so as to achieve customers’requirements.

  • ANSI/ASME Y14.5
  • ISO-10110
  • MIL-C-48497A
  • MIL-STD-810
  • MIL-PRF-13830B
  • MIL-C-675C

Materials Compliance

· RoHS Compliance Declaration