A non-contact glass brick refraction index measuring instrument

Abstract

The invention discloses a non-contact glass brick refractive index measuring instrument. The non-contact glass brick refractive index measuring instrument mainly comprises a laser emitting device, a light intensity detecting device, a fixed ring, a telescopic support frame, a controllable universal wheel and a circuit board control module. The measuring instrument has high laser brightness and good laser parallelism so that the light intensity detection device can easily detect light intensity change, can accurately measure a refractive index of a glass brick without contacting with the glass brick, has a simple mechanical structure and a simple circuit structure, is easy to implement, is controlled based on a single chip microcomputer, can realizes device adjustment and measurement automation, and is fast and convenient in the whole operation process. The instrument only needs to measure reflected light intensity of the surface of a glass brick and thus refractive indexes of non-transparent or translucent crystals can be measured and an application range is wide.

Description

technical field [0001] The invention relates to a glass brick refractometer, in particular to a non-contact glass brick refractometer. Background technique [0002] Usually when we measure the refractive index of a glass brick in the laboratory, we often use the following methods: [0003] 1. Pin insertion method: place the glass brick on a whiteboard, use a pencil to stick one side to draw the incident surface, and then insert two pins on one side of the incident surface of the glass brick to simulate the incident light. Observe from the other side, move the position of the human eye so that the two pins overlap in the field of view, so that the corresponding outgoing light can be determined, and the incident angle and outgoing angle can be obtained after removing the glass brick, and then the refractive index of the glass brick can be obtained according to the law of refraction . [0004] 2. Spectrometer minimum deflection angle method: move the glass block to the spectr...

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Problems solved by technology

[0005] However, when the above method measures the refractive index of the glass brick, the surface of the glass brick will be in contact with human hands or measuring instruments, which may cause abrasion on the glass surface and affect the relevant physical properties of the glass brick.

At the same time, in some specific occasions, such as when the position of the glass has been fixed, people cannot move the glass; for some high-temperature glass bricks, people are not allowed to touch with hands or measuring instruments, so the above methods cannot be applied to these situations

[0006] Therefore, there is a need for a non-contact method of measuring the refractive index of glass bricks. However, most of the non-contact measurement devices on the market use methods based on CCD laser measurement or other computer methods, which have complex structures and high prices.

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