Abbe refractometer maintenance
The zero point of the scale of the Abbe refractometer dial sometimes moves and needs to be corrected. The calibration method is generally to use a standard liquid with a known refractive index, usually pure water.
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Explanation of Gem Refractometer Phenomena
When the gemstone to be tested rotates 360° on the refractometer, there is always only one shadow boundary (fixed), indicating that the gemstone is an isotropic gemstone (single refraction gemstone).
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Gem refractometer operation essentials
Gem refractometer operation essentials
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Gem refractometer (gem refractometer) is an instrument used to measure the refractive index of gemstones. It uses a hemisphere of a high refractive index homogeneous material (such as lead glass or synthetic cubic zirconia) as a prism;
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How to Troubleshoot Abbe Refractometers
Possible reasons: ①The eyepiece and related optical parts have dust and oil stains; ②The sample is not full of the prism surface; ③The gap between the upper and lower prisms is too large; ④The position of the achromatic prism is not diagonal; ⑤The surface of the refracting prism is rough or corroded.
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What is an Abbe refractometer?
The Abbe refractometer is an instrument capable of measuring the refractive index nD and average dispersion nF-nC of transparent, translucent liquids or solids (among them, transparent liquids are mainly used).
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