The optical system of the human being is independent of the shape and the light distribution of the light source, and it is necessary to irradiate the spectral device (prism, grating, etc.) under the same geometrical condition. The utility model is characterized in that the light emitted by the human body can be diffused through reflection or diffused through the narrow slit of the spectrometer. Integral sphere, diffusion reflection plate and diffusion transmission plate for diffusion.
The material used for integrating sphere and diffusion reflection plate is barium sulfate coating, pressed PTFE (polytetrafluoroethylene) powder or compression molding. The material of the diffusion plate is white opal glass, milky white acrylic board, single side or double side frosted glass plate. Figure 1.7 shows the integrating sphere, figure 1.8
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