| 摘要 |
An apparatus and method for fluorescence spectral and color measurements of diamonds, gemstones and the like. The apparatus comprises a spectrometer, and computer and a dual integrating sphere measurement arrangement comprising a measurement integrating sphere, a sample integrating sphere, a sample platform, a lens system, a baffle, an ultraviolet radiation source on the top of the sample integrating sphere, and another light source attached to the measurement integrating sphere. The sample on the sample platform is radiated by the ultraviolet radiation source on the top of the measurement integrating sphere. The sample emits fluorescent light into the measurement integrating sphere, and the fluorescent light is received by the lens system. The spectrometer separates the fluorescent light into spectral signals, and the computer calculates the fluorescence spectrum and colorimetric data. |
| 主权项 |
1. A fluorescence spectral measurement and fluorescence color measurement apparatus comprising:
a spectrometer for measuring the fluorescence spectrum of a sample: a dual integrating sphere measurement arrangement that is configured to house a sample, provide ultraviolet radiation on the sample, collect fluorescent light from the sample, and transmit the fluorescent light to the spectrometer; the spectrometer is configured to separate the fluorescent light into a spectrum, convert the spectrum into digital signals, and send the digital signals to a computer; the computer is configured to calculate measurement parameters of the sample, control the spectrometer, calculate the fluorescence spectrum of the sample and calculate the fluorescence color of the sample; said dual integrating sphere measurement arrangement includes: a sample integrating sphere that is configured to provide a diffuse white measuring environment for the sample, which sample integrating sphere has a bottom, an internal area, an ultraviolet emission source, and an open area; a measurement integrating sphere with at least one lens system port, a light port, an internal area, an open area, and a top; a sample platform connecting the measurement integrating sphere to the sample integrating sphere, the sample platform having an upper surface, a bottom surface, and a middle, the sample platform contains a round hole called a measurement aperture; a measurement aperture set on the sample platform, the measurement aperture filter is configured to accommodate the sample; a lens system attached to the measurement integrating sphere and configured to receive fluorescent light from the sample; an ultraviolet emission source that is retained on the top of the sample integrating sphere to provide ultraviolet radiation; said ultraviolet emission source is installed on the top of the sample integrating sphere to provide ultraviolet radiation on the sample; the ultraviolet emission source is selected from at least one of an ultraviolet lamp, an ultraviolet fluorescence lamp, an arc lamp, a filtered arc lamp, an ultraviolet laser, and a light emitting diode (LED); and said ultraviolet emission source is connected to a group of electronic circuits selected from at least one of a current limiting resistor in series, a voltage converter, a voltage regulator, a current regulator, and a voltage divider. |
