CN104240572A - Refractometer for measuring refractive index of transparent liquid - Google Patents

Abstract

The transparent liquid refractometer includes a convex cylinder, a rotating body and a laser, and is characterized in that: a semi-cylindrical barrel is arranged in the protruding body of the convex cylinder, and the central axis of the barrel and the center of the convex cylinder The axes are coaxial, and the top surface of the convex cylinder is divided into four quadrants. Each quadrant is engraved with a scale of 0-90 degrees. The connecting line of the two 90-degree scales coincides with the diameter line. It is composed of an L-shaped bracket. The side wall of the torus is vertically fixedly connected to the left end of the short side of the L-shaped bracket. A laser is fixed on the top of the L-shaped bracket. The linear laser emitted by the laser is parallel to the upper surface of the torus, and the torus The inner diameter is equal to the outer diameter of the protruding part of the convex cylinder, the torus can rotate around the protruding part of the convex cylinder, the convex cylinder is made of transparent glass, and the rotating body is made of plastic. The beneficial effect is: convenient use, obvious effect and easy production.

Description

Transparent Liquid Refractive Index Meter

technical field

The invention belongs to the field of physical experiment instruments and relates to a transparent liquid refraction index measuring instrument.

Background technique

Most of the existing refractometers are for the measurement of the refractive index of transparent solids. There are few instruments for the measurement of the refractive index of transparent liquids, and complex instruments are needed. Simple instruments, convenient operation, and obvious effects of transparent liquid refraction are required. rate meter.

Contents of the invention

Aiming at the existing problems, the invention provides a transparent liquid refractometer, which is simple in instrumentation, convenient in operation and obvious in effect.

The technical scheme adopted by the present invention to solve the technical problem is: a transparent liquid refractometer, comprising a convex cylinder, a rotating body and a laser, characterized in that: the convex body of the convex cylinder is provided with a semi-cylindrical Barrel, the central axis of the barrel is coaxial with the central axis of the convex cylinder, the top surface of the convex cylinder is divided into four quadrants, each quadrant is engraved with a scale of 0-90 degrees, and the two 90-degree scales are connected Coincident with the diameter line, the rotating body is composed of a torus and an L-shaped bracket. The side wall of the torus is vertically fixedly connected to the left end of the short side of the L-shaped bracket. The top of the L-shaped bracket is fixedly equipped with a laser. The laser light is parallel to the upper surface of the torus, the inner diameter of the torus is equal to the outer diameter of the convex part of the convex cylinder, and the torus can rotate around the convex part of the convex cylinder, which is made of transparent glass Made, the rotating body is made of plastic.

During the experiment, pass the protruding part of the convex cylinder upwards from under the torus, fill the barrel with the transparent liquid to be tested, turn on the laser, and the laser emitted by it will be incident vertically on the side wall of the convex cylinder and straight-line Propagate to the vertical plane where the diameter line is located to form an incident ray. The light passes through the vertical plane where the diameter line is located to form a refracted ray. Rotate the torus and change the incident angle i to find the clearest incident ray and refraction Light, looking down at the upper surface of the convex cylinder, directly reads the incident angle i and the refraction angle q. Since the refractive index n2 of the glass is known, it can be directly calculated according to the formula Find n1.

The invention has the advantages of simple structure, convenient use, obvious effect and easy production.

Description of drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is a perspective view of a convex cylinder 1;

Fig. 3 is a top view of the convex cylinder 1;

FIG. 4 is a perspective view of the rotating body 4 .

In the figure: 1-convex cylinder 2-barrel 3-diameter line 4-rotating body 5-laser 31-scale 41-ring body 42-L-shaped bracket

Detailed ways

Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail:

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the transparent liquid refractometer of the present invention comprises a convex cylinder 1, a rotating body 4 and a laser 5, and is characterized in that: the convex cylinder 1 A semi-cylindrical barrel 2 is arranged in the protruding body, the central axis of the barrel 2 is coaxial with the central axis of the convex cylinder 1, and the top surface of the convex cylinder 1 is divided into four quadrants, and each quadrant is engraved with 0-90 Degree scale 31, two 90-degree scale lines coincide with the diameter line 3, the rotating body 4 is made up of a torus 41 and an L-shaped bracket 42, the side wall of the torus 41 and the short side of the L-shaped bracket 42 The left end is vertically fixedly connected, and the top of the L-shaped bracket 42 is fixedly provided with a laser 5, and the linear laser light emitted by the laser 5 is parallel to the upper surface of the torus 41, and the inner diameter of the torus 41 is equal to the outer diameter of the protruding part of the convex cylinder 1. Diameter, the torus 41 can rotate around the convex part of the convex cylinder 1, the convex cylinder 1 is made of transparent glass, and the rotating body 4 is made of plastic.

During the experiment, pass the protruding part of the convex cylinder 1 upwards from under the torus 41, fill the barrel 2 with the transparent liquid to be tested, turn on the laser 5, and the laser light emitted by it will be incident vertically on the convex cylinder 1 The side wall and straightly propagates into the vertical plane where the diameter line 3 is located to form an incident ray, and the light passes through the vertical plane where the diameter line 3 is located to form a refracted ray, and the torus 41 is rotated to change the size of the incident angle i, Find the clearest incident ray and refracted ray, look down at the upper surface of the convex cylinder 1, and directly read the size of the incident angle i and the refracted angle q. Since the refractive index n2 of the glass is known, it can be directly according to the formula n1=n2sinq/ sin i to find n1.

Claims (2)

1. transparency liquid refractive index tester, comprise convex cylindrical body, rotary body and laser instrument, it is characterized in that: in the bossy body of described convex cylindrical body, be provided with semicolumn bodily form bucket, circle core shaft and the circle core shaft of convex cylindrical body of bucket are coaxial, the end face of convex cylindrical body is divided into four quadrants, each quadrant is carved with the scale of 0-90 degree, the scale line of two 90 degree overlaps with diameter line, described rotary body is made up of torus and L bracket, toric sidewall is fixedly connected with L bracket minor face left end is vertical, the top of L bracket is fixedly installed laser instrument, the linear laser that laser instrument sends is parallel with toric upper surface, toric internal diameter equals the external diameter of convex cylindrical body projection, torus can rotate around convex cylindrical body projection.

2. transparency liquid refractive index tester according to claim 1, is characterized in that: described convex cylindrical body is made up of clear glass, and rotary body is made of plastics.