Optical scatter measurements per ASTM E2387, the industry-standard practice for goniometric optical scatter measurements
The fundamental optical characteristic of a material is the Bidirectional Reflectance Distribution Function (BRDF). This describes the angular distribution of light scattered from a surface for a given incident beam of light. It is thus a function of incident beam angle, reflected beam angle, polarization, wavelength, and intrinsic material properties.
Our measurements lab utilizes a state-of-the-art bidirectional reflectometer designed in-house based on over 45 years of experience in optical measurements and related analytical computer models. Our Bidirectional reflectance/transmittance measurement capabilities span the range from 0.3 μm to beyond 14 μm with a full four degrees of angular freedom (incident polar and azimuthal angle, and reflected polar and azimuthal angle). BRDF/BTDF measurements fully quantify not only how much a sample reflects, but also exactly where the reflected energy goes. These measurements are typically made broadband, or at a series of customer specified wavelengths.
What is ASTM E2387-19?
ASTM E2387-19 is the standard practice for performing goniometric optical scatter measurements. This practice involves measuring the distribution of light scattered by a surface when illuminated by a collimated light source. These measurements are crucial for evaluating the optical performance of materials, especially in applications where control of scattered light is essential, such as in optics, coatings, and surface finishes.
Our Testing Capabilities
We offer a comprehensive suite of testing services to meet your needs, including:
- Bidirectional Reflectance Distribution Function (BRDF): Measure the reflection properties of surfaces to determine how light is scattered at various angles.
- Bidirectional Transmittance Distribution Function (BTDF): Assess the transmission properties to understand how light passes through and scatters within materials.
- Specular and Diffuse Reflection Analysis: Evaluate the balance between specular (mirror-like) and diffuse (scattered) reflection from surfaces.
- Surface Roughness and Finish Evaluation: Analyze how surface texture impacts light scatter characteristics.
Why Choose Surface Optics
- Advanced Equipment: Our laboratory is equipped with a cutting-edge automated goniometric system to deliver precise and repeatable results.
- Expert Team: Our experienced scientists and engineers are experts in optical measurements, prepared to support analysis of your sample materials.