Multi-angle broadband surface reflectance measurement device and method
A technology of surface reflectance and measurement device, which is applied in the field of optical radiation measurement and remote sensing radiation calibration, can solve the problems of complex measurement equipment and long measurement time period, so as to improve measurement accuracy, avoid spectral matching and spectral attenuation errors, and reduce errors. The effect of small attenuation errors
Pending Publication Date: 2021-05-25
安徽中科谱锐达光电有限公司
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Problems solved by technology
This measurement method can realize the measurement of surface reflectance in a large angle range, but the measurement equipment is complicated and the measurement time period is long
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[0025] Such as figure 1 As shown, a multi-angle wide-band surface reflectivity measurement device includes a fixed bracket 1, a multi-angle measurement lens assembly 8, a two-dimensional pan-tilt one 4, a two-dimensional pan-tilt two 7, a cosine corrector 5, and a multi-angle stop Optical device 6, optical fiber bundle 3 and spectral measurement module 2; Described two-dimensional pan-tilt-4, cosine corrector 5, multi-angle light blocking device 6 are fixed on the upward extension rod 1.2 of fixed support, multi-angle measurement lens assembly 8 is fixed on the lower end of the two-dimensional cloud platform 2 7, and as a whole, is fixed on the horizontal bar end of fixed support 1. The output ends of the multi-angle measurement lens assembly 8 and the cosine corrector 5 are respectively connected to the input end of the spectrum measurement module 2 through the fiber bundle 3 , and the multi-angle light blocking device 6 is used to block sunlight shining on the cosine correct...
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The invention discloses a multi-angle broadband surface reflectance measurement device and method. The device comprises a fixed support, a multi-angle measurement lens, two two-dimensional rotary tables, a cosine corrector, a multi-angle light blocking device, an optical fiber bundle and a spectral measurement module. The device comprises two measuring light paths, and switching of the double light paths is achieved through switching of a lens and a light barrier in a cosine corrector. The two measuring light paths adopt the same spectrum module, time-sharing measurement of the earth surface reflection radiance and the total illumination is achieved, errors caused by spectrum matching and module attenuation are avoided, the measuring precision of the earth surface reflectivity is improved, meanwhile, through application of the two-dimensional holder, multi-angle rotation of the lens is achieved, and the multi-angle surface reflectance is obtained. The invention provides a practical technical means for high-precision automatic measurement of multi-angle surface reflectance, and has important value in the field of satellite remote sensor in-orbit radiometric calibration.
Description
technical field [0001] The invention relates to the technical field of optical radiation measurement and remote sensing radiation calibration, in particular to a multi-angle wide-band surface reflectivity measurement device and method. Background technique [0002] Two-way reflection is the basic physical characteristic of objects in nature, and its reflected radiation characteristics can reflect the surface structure characteristics of objects and the composition materials of objects. Traditional single-direction remote sensing can only obtain the projection of ground targets in one direction, and lacks sufficient information to infer the main material spectrum and spatial structure of a single pixel of an object, making quantitative remote sensing very difficult. Compared with single-direction remote sensing, multi-angle earth observation can obtain more abundant target observation information by observing fixed targets on the ground in multiple directions, so it is hopefu...
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Login to View More IPC IPC(8): G01J1/04G01J1/42G01J3/28
CPCG01J1/04G01J1/42G01J3/28
Inventor 潘琰余卫政曹为博吴龙丁言志
Owner 安徽中科谱锐达光电有限公司