Indoor hyperspectral bidirectional reflectance distribution function (BRDF) determining system

Abstract

The invention relates to an indoor hyperspectral bidirectional reflectance distribution function (BRDF) determining system, which comprises a light source area, a hyperspectral auxiliary brightness gauge adjusting area, a carrier stage area and a base which is horizontally placed; the light source area comprises a light source, a light source space adjusting valve, a light source supporting rod and a semi-arc slide rail, wherein the light source is hinged with the circular center of the semi-arc slide rail which is fixed on the side surface of the base through the light source supporting rod; the hyperspectral auxiliary brightness gauge adjusting area comprises an auxiliary brightness gauge, a space adjusting device, a quarter-arc slide rail and a hollow rotary disc, wherein the carrier stage area is arranged on the center of the base, and the hollow rotary disc is fixed on the center of the base; an optical axis of the light source always points to the center of the hollow rotary disc; and both the light source and the auxiliary brightness gauge are powered on. The indoor hyperspectral BRDF determining system has beneficial effects that: shade can be eliminated, the measuring precision can be improved, and the flexibility of the measuring range can be improved; and the rotation of the carrier stage can introduce the azimuth angle characteristic of the BRDF light source, so the completeness of the BRDF determination can be enhanced.

Description

technical field [0001] The invention relates to an indoor hyperspectral BRDF measurement system, which belongs to the physical instrument part. Background technique [0002] In the application of spectral geology, the spectral characteristics of ground objects are the basis of direct extraction of ground object information. However, in nature, most of the ground objects are characterized by non-Lambertian sources. The spectral characteristics of the target ground objects are related to the spatial geometric positions of the incident and reflected light rays and their wavelengths. The anisotropy of the target ground objects can be Bidirectional Reflectance Distribution Function (Bidirectional Reflectance Distribution Function, BRDF) is accurately described because BRDF is the reflection in the reflection direction represented by the incident azimuth and zenith angle, the reflection azimuth and zenith angle, and the wavelength of light in the path The ratio of the luminance v...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the shadow produced by the single light source used in the current BRDF measurement system leads to the reduction of measurement accuracy, and the azimuth angle and field angle of the incident light source of the BRDF measurement system have limitations during observation, resulting in incomplete characteristics of the BRDF of the target object. Problem, propose an indoor hyperspectral BRDF measurement system that eliminates shadows, improves measurement accuracy, and improves the azimuth and field angle limitations of the incident light source

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