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Optical Properties Testing

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Optical Properties Testing

The optical properties of a substance mainly refer to the various properties of the substance when it absorbs, reflects and refracts light, as well as the phenomenon of light interference and scattering caused by the substance. Optical properties are one of the most important and commonly used properties of materials. The performance evaluation of thin films, ceramics, glass, powder, polymers, intraocular crystals and even colloids is inseparable from the characterization of optical properties. As a professional reliability third-party testing organization, T,C&A Lab can provide Optical Properties Testing service according to ISO, ASTM standards and industry requirements. Welcome to contact our experts for consultation.

Our testing capabilities include, but are not limited to:

  • Glass

The optical properties of glass refer to the refraction, reflection, absorption and transmission of glass. Glass is often used as a transparent material, so the study of its optical properties is of great significance both in theory and in practice.

  • Ceramics

Ceramic materials also have unique optical properties, which can be used as solid-state laser materials, optical fiber materials, optical storage, etc., transparent ceramics can be used for high-pressure sodium lamps and so on. Therefore, it is of great significance to detect the optical properties of ceramics.

  • Polymer

The measurement of optical properties is used to study the structure of polymer, such as polymer type, molecular orientation, crystallization, etc.

Our testing items include but are not limited to:

  • Refractive Index

The refractive index is one of the most important physical constants of organic compounds. It can be measured accurately and conveniently. As a standard for the purity of liquid substances, it is more reliable than the boiling point. The refractive index can be used to identify unknown compounds and is also used to determine the composition of liquid mixtures.

  • Dispersion Coefficient

Dispersion coefficient is an important indicator to measure the degree of dispersion of light by the medium. It is usually expressed by Abbe number, so the dispersion coefficient is also called Abbe number, which determines the quality of the lens imaging. The larger the dispersion coefficient (Abbe number), the less obvious the dispersion and the better the imaging quality of the lens.

  • Birefringence

Birefringence is usually quantified as the maximum difference in refractive index between materials. Our polymer scientists use polarized light to achieve birefringence, which can be used to quantify stress in transparent plastics.

  • Reflection Coefficient

Reflection coefficient refers to the ratio of the intensity of the reflected light on the surface to the intensity of the incident light when the light is projected on the object. It is affected by the projection angle, intensity and wavelength of the incident light, the properties of the material on the surface of the object and the measuring angle of the reflected light.

  • Haze

Haze is an objective measurement of high-gloss surfaces. A good quality surface should have a clear and bright appearance. The microstructure caused by the poor dispersion of the pigments of the paint will have a milky appearance.

  • Glossiness

Gloss, as the surface characteristic of an object, depends on the specular reflection ability of the surface to light. The so-called specular reflection refers to a reflection phenomenon where the reflection angle is equal to the incident angle. Glossiness is a physical quantity that evaluates the ability of the surface of a material to reflect light under a set of geometrically prescribed conditions.

Standards we test to

  • ASTM D1218, ASTM D1747, ASTM E1303, ASTM E1967, ASTM D7419, ASTM D6591, ASTM D6379, ASTM D5775
  • ISO 16378, ISO 3538, ISO 11979, ISO 9211, ISO 23946, ISO/TR 10688, ISO 12625, ISO 18526

In addition, the experts in our Optical Properties Testing Laboratory also provide a variety of custom services as your needs and requirements. Let's discuss the custom services with our experts for free.

Instruments and data

Optical Properties Testing
Optical Properties Testing Service


  1. Biswas, S.; et al. Directed C–H Functionalization Reactions with a Picolinamide Directing Group: Ni-Catalyzed Cleavage and Byproduct Recycling. The Journal of organic chemistry 84.20 (2019): 13112-13123.

Note: the service is for research use only and not intended for any clinical use.


T,C& A LAB is an independent lab providing quality or custom testing, characterization and analysis of a variety of materials. Our engaged experts are ready to help you.

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