Refractive index measuring instrument

Abstract

The invention discloses a refractive index measuring instrument which comprises a dial, an activity pointer, a glass tile and a marker, wherein the dial is placed above the glass tile, and is provided with at least two slots which are respectively positioned on an incident light side and a refracted light side; the inner edge of the slot positioned on the refracted light side is tangent to the glass tile; the activity pointer is rotationally connected with the dial, and is provided with a hairline; an incident angle is read on the dial according to an incident light position; the direction of refracted light is calibrated by virtue of the marker, the activity pointer and the slots; a refraction angle is read on the dial through the hairline on the activity pointer, so as to calculate the refractive index of glass. When the refractive index measuring instrument provided by the invention is in use, light drawing is not needed, and the incident angle and the refraction angle are read through scales on the dial, thereby avoiding measurement errors introduced by the light drawing, greatly reducing the workload and improving the measurement efficiency.

Description

technical field [0001] The invention relates to an optical experiment measuring instrument, in particular to a refractive index measuring instrument used in experiments and teaching. Background technique [0002] Measuring the refractive index of glass is an application technology with wide requirements in production and life. Using the principle of light refraction, first determine the incident light on the glass interface and the refracted light inside the glass, and then calculate the refractive index of the glass. Existing instruments for measuring the refractive index of glass include light velocity measuring instrument, Michelson interferometer and laser autocollimator. These three instruments are all measured by high-energy light sources. On the one hand, the cost is high, and on the other hand, there are certain requirements for the professionalism of the operator. Therefore, they are widely used in fields such as higher education, scientific research institutes, and...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that it is difficult to accurately draw rays in the prior art, the present invention provides a refractometer. When using the refractometer to measure the refractive index, it is not necessary to draw rays, and the angle of incidence and refraction can be read through the circular protractor on the dial. This avoids measurement errors introduced by drawing rays

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