| 摘要 |
A reflectivity absorption system for identifying a target precious or semi-precious material can include a detector, a filter system, and an output display. The detector system is capable of detecting a reflected electromagnetic radiation at a primary wavelength and a secondary wavelength. The reflected electromagnetic radiation can be produced from sunlight or other light source. The primary wavelength corresponds to an upper reflectivity of the target material while the secondary wavelength corresponds to a lower reflectivity of the target material. Reflectivity is a function of wavelength such that identifiable variations in wavelength can be observed for certain materials over specific wavelength ranges which are then compared to a known standard reflectivity response for the indicated wavelengths. These systems can be used in portable, handheld, or stationary configurations and can identify exposed target materials in real-time.
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