BRDF automatic test system and test method

Abstract

Disclosed are a BRDF (Bidirectional Reflectance Distribution Function) automatic test system and a test method. The test system comprises a solar simulator, an electric displacement table, a detectionsystem, a BRDF spectrum automatic acquisition system, and a BRDF data processing system. The solar simulator emits a visible light beam to irradiate a sample on the electric displacement table. The electric displacement table is used for realizing movement and rotation of the sample in a three-dimensional space. The detection system comprises a movable platform, a two-dimensional rotary platformmounted on the movable platform, a telescope, a fiber probe, and a spectrometer connected with the optical fiber probe through detection optical fibers. The BRDF spectrum automatic acquisition systemis used for controlling motions of the electric displacement table, so that the electric displacement table drives the sample to rotate at any angle in the space. The spectrometer controlling the detection system collects scattering spectrums at any angle of the sample. The BRDF data processing system is used for processing collected spectrum data to obtain BRDF data at any angle. The BRDF automatic test system is adjustable in detection distance, can achieve detection of long-distance and large-volume objects, and is high in detection precision.

Description

technical field [0001] The invention belongs to the field of spectrum measurement, and specifically relates to a BRDF automatic test system and a test method. The test system adopts a light source with a fixed relative position, and changes the relative angle between the sample and the detection end to realize the remote measurement of the scattering spectrum of the sample. And take polytetrafluoroethylene as the standard plate to calculate the automatic test system of sample BRDF. Background technique [0002] Since the BRDF was formally proposed, methods for measuring this function have become more and more advanced. Radiometer measurement was used in the early days, and now there are two main types of bidirectional reflectance distribution function measurement, one is the imaging BRDF measurement using a CCD digital camera; the advantage of this method is that the test field of view is wide, and it can Obtain multiple measurement data, greatly reducing the measurement ti...

AI Technical Summary

Problems solved by technology

[0003] The first object of the present invention is to provide a BRDF automatic test system to solve the technical problems of poor measurement accuracy of existing test systems, limited test distance and detection field of view

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