Abstract:For refractive index measurement, this paper presents a new method based on a laser diffractometer, in which a reflective diffraction beam coincides with an incident beam. Calculation by using the angle of a reentry beam, grating pitch, and laser wavelength yields the refractive index. Based on a Littrow configuration, grating pitch measurement and immersion diffractometry are implemented to determine the refractive index of transparent liquids such as water, oil, and translucent liquids mixed with particles. … Show more
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