The reflection and transmission characteristics of an object or material are its basic physical properties, which are not only closely related to the perception of the human eye, but also the basis for further simulations of various appearances and optical designs. The physical properties of many objects or materials are anisotropic, that is, the incident light in different directions has different reflectance/transmittance at different observation positions. For example:
The anisotropic reflection and transmission characteristics of these objects can be expressed by the spatial bidirectional scattering distribution function (BSDF). It can be divided into bidirectional transmission distribution (BTDF) and bidirectional reflection distribution (BRDF).
Measurement solutions for BRDF and BTDF
The BBMS-3000/4000 bidirectional reflection/transmission spatial distribution measurement system can comprehensively analyze and measure the reflection and transmission characteristics of the surface of the material. The measurable parameters include the bidirectional transmission distribution (BTDF), bidirectional reflection distribution (BRDF), reflectance distribution, transmission Specific distribution, total reflection (TIR), total scattering (TIS), etc., can be widely used in the quantitative analysis of surface optical properties of various high-performance optical films, window glass, special coatings/coatings and many other materials. Its BRDF/ BTDF data can be exported to standard files to LightTools, Tracepro, Zemax, Speos and other optical software for optical simulation design.
The system can realize the hemispherical reflection/transmission distribution test under any light direction in the space, and meet the design requirements of ASTM national standards.
The measurement wavelength can cover the ultraviolet-visible-near-infrared range, which meets the measurement of the surface scattering characteristics of materials of different sizes and different samples under different angles of irradiation. The system adopts the absolute method for testing, no reference standard is required, and it is not restricted by the shape and optical properties of the sample. It is suitable for the measurement of various optical characteristic samples such as diffuse type, specular type, and high-definition film.
Typical Measurement Interface
Typical measurement applications of BBMS-3000/4000
★Quantitatively analyze the surface scattering characteristics of materials under different wavelength light irradiation conditions. The materials that can be tested include: special coatings, polished surfaces, etc.
★Test the spatial scattering characteristics of transparent and translucent high-performance optical film materials and window materials, and use them in the research and development of special optical materials such as images, performance enhancement, and backlight display.
★Assist in the design of optical components and systems, such as the design of automotive interiors and optical lenses. In the optical system, there are light sources and devices that change the optical path/light energy (such as reflective surfaces, transmissive surfaces, etc.). The BRDF and BTDF data measured by BBMS-3000/4000 are directly imported into the optical design software for subsequent optical construction. models and simulations.
