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- W3207605105 abstract "Spectral reflectance plays an important role in the evaluation of the object surface, such as the color, the roughness. A new method is proposed to measure the spectral reflectance at a fixed incident angle. The chromatic confocal displacement sensor is modified with an annular stop to generate a hollow cone beam of incident light on the to-be measured sample surface. With self-reference strategy, the upper and lower envelops are derived from the axial scanning of the dispersion probe, whose minus is named as self-reference spectrum. Thus, the reflectance at every wavelength among the valid dispersion bandwidth can be achieved by comparing the self-reference spectra of the sample surface and a standard mirror with known spectral reflectance. With the proposed method and experimental setup, the spectral reflectance of several metal surfaces is obtained and compared with their theoretical spectral reflectance within ±0.04. It proves that the modified chromatic confocal can provide feasible results for the spectral reflectance measurement." @default.
- W3207605105 created "2021-10-25" @default.
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- W3207605105 date "2021-10-09" @default.
- W3207605105 modified "2023-09-25" @default.
- W3207605105 title "A modified chromatic confocal system for spectral reflectance measurement" @default.
- W3207605105 doi "https://doi.org/10.1117/12.2602209" @default.
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