CN103868886A

CN103868886A - Refractive index determinator

Info

Publication number: CN103868886A
Application number: CN201310751925.5A
Authority: CN
Inventors: 危舒宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2014-06-18

Abstract

The invention relates to a refractive index determinator described in a figure 1 and a figure 2. Firstly, a lower pointer (4) points at a certain scale, and then one half of the device is soaked into liquid; a boundary line of upper and lower semicircles is flush to the liquid level; the lower pointer (4) is observed by a measurer along an upper pointer (3), and the upper pointer (3) is ceaselessly adjusted; the adjustment is stopped when the condition that the upper and lower pointers point at the same straight line are observed; the reading numbers of the upper and lower points are read out; the reading number of the upper pointer (3) refers to the degree of the incidence angle, the reading number of the lower pointer (4) refers to the degree of the refraction angle, the refractive index of the liquid can be calculated by inserting the refraction angle into n=sini/sinr. The refractive indexes of solids are determined to be similar. The refractive index determinator is simple in structure, easy to operate, and quick to determine, and the solids and the liquid can be determined.

Description

Refractive index tester

Technical field

The invention belongs to optical instrument technical field, relate to the determining instrument of solid and liquid refractivity.

Technical background

Existing middle school physical experiment all adopts contact pin method to carry out the mensuration of glass refraction, exists mensuration process complexity, and finding speed is slow, the problem that measurement result error is large; Application number is that 03207925.7 " refraction of light and total reflection experiment device " and application number are 90210365.2 " experimental facility for refractivity of transparent plates ".Be useful light source, and can not measure the refractive index of liquid.Application number 201210147977.7 " a kind of variable apex angle liquid prism " also can only be measured the refractive index of liquid, can not measure the refractive index of solid.

Goal of the invention

The object of this invention is to provide a kind of instrument that can conveniently measure the refractive index of solid and liquid.

Summary of the invention

The present invention is achieved in that is equipped with two pieces of pointers on a base plate with index dial, and index dial is upper and lower two semicircles, above angled scale, two pieces of pointers are indicated respectively the reading of upper and lower two semicircles.In the time measuring the refractive index of liquid, first lower pointer is pointed to a certain scale, then this device half is immersed in liquid, the boundary line of above lower half circle flushes with liquid level, at this moment gauger removes to observe lower pointer along upper pointer, and to ceaselessly adjust and observe, when observing upper and lower pointer point-blank time, stop adjusting, read the reading of upper and lower pointer, the reading of upper pointer be incident angle to descend the reading of pointer be refraction angle, bring n=sini/sinr into and just can calculate the refractive index of liquid.

In measuring solid refractive index, first lower pointer being removed or forward to upper semi-circle need not, draw a line or paste the preceding paragraph adhesive plaster at the lower surface of the tested transparent body, the upper surface of the transparent body flushes and leans against on device with the boundary line of upper lower half circle, the mobile transparent body is to a certain position, make the end line of line or adhesive plaster corresponding to a certain scale mark, at this moment gauger removes to observe the end line of line or adhesive plaster along upper pointer, and to ceaselessly adjust and observe, when observing upper pointer and line or end line point-blank time, stop adjusting, read the reading of the reading of pointer and the scale at line or adhesive plaster end line place, the reading of upper pointer is that incident angle is rule or the reading of the scale at adhesive plaster end line place is refraction angle, bring n=sini/sinr into and just can calculate the refractive index of liquid.

The present invention has simple in structure, processing ease, measures fast, and solid, liquid can be measured.

Brief description of the drawings

Fig. 1 is the principle schematic of measuring liquid refractivity

Fig. 2 is the schematic side view of Fig. 1

Fig. 3 is the principle schematic of measuring transparent body refractive index

Fig. 4 is the schematic side view of Fig. 3

(1) be that base plate, (2) are that scale, (3) are that upper pointer, (4) are that lower pointer, (5) are the transparent body

Embodiment

1, measure liquid refractivity

As shown in Figure 1 and Figure 2, first lower pointer (4) is pointed to a certain scale, then this device half is immersed in liquid, the boundary line of above lower half circle flushes with liquid level, at this moment gauger removes to observe lower pointer (4) along upper pointer (3), and will ceaselessly adjust pointer (3); When observing upper and lower pointer point-blank time, stop adjusting, read the reading of upper and lower pointer, the reading of upper pointer (3) be incident angle to descend the reading of pointer (4) be refraction angle, bring n=sini/sinr into and just can calculate the refractive index of liquid.

2, measure solid refractive index

As Fig. 3, shown in Fig. 4, first lower pointer (4) being removed or forward to upper semi-circle need not, draw a line or paste the preceding paragraph adhesive plaster (6) at the lower surface of the tested transparent body (5), the upper surface of the transparent body (5) flushes and leans against on device with the boundary line of upper lower half circle, the mobile transparent body (5) is to a certain position, make the end line of line or adhesive plaster (6) corresponding to a certain scale mark, at this moment gauger removes to observe the end line of line or adhesive plaster (6) along upper pointer (3), and to ceaselessly adjust pointer (3), when observing upper pointer (3) and line or adhesive plaster (6) end line point-blank time, stop adjusting, read the reading of the reading of pointer (3) and the scale at line or adhesive plaster (6) end line place, the reading of upper pointer (3) is that incident angle is rule or the reading of the scale at adhesive plaster (6) end line place is refraction angle, bring n=sini/sinr into and just can calculate the refractive index of solid.

Claims

1. the solid, liquid refractive index tester being formed by base plate, pointer, upper lower half circle index dial, it is characterized in that on base plate, there is upper lower half circle scale, and form a circle, on the center of circle, be fixed with upper and lower two pointers, the edge line of pointer is crossed the center of circle or on pointer, is had the index line of obviously crossing the center of circle.