2WAJFive phase Abbe refractometerOptical component structure composition

Abbe refractometer is capable of measuring the refractive index of transparent, semi transparent liquids or solidsn_DAnd average dispersionn_F-n_CThe instrument (mainly for measuring transparent liquids), if connected to a thermostat, can measure the temperature as0º～70ºCInternal refractive indexn_D.

Refractive index and average dispersion are important optical constants of a substance, which can be used to understand its optical properties, purity, concentration, and dispersion size. This instrument can measure the percentage of sugar concentration in sucrose solution（0～95%, equivalent to a refractive index of1.333～1.531）. Therefore, the instrument has a wide range of applications and is one of the commonly used equipment in factories, schools, and research institutions related to the petroleum industry, oil and fat industry, pharmaceutical industry, paint industry, food industry, daily chemical industry, sugar industry, and geological exploration.

Optical section:

The optical part of the instrument consists of a telescope system and a reading system

Entrance prism（3）Refractive Prism（2）There is a small and uniform gap between them, and the measured liquid is placed in this gap. When light (sunlight or incandescent light) enters the prism（3）When,Generate diffuse refraction on the frosted surface below it, allowing various angles of incident light to pass through the refractive prism in the measured liquid layer（2）Generate a beam with refractive angles greater than the critical anglesThe light. A mirror that swings and is coaxially connected to the scale plate（1）This beam of light can be directed into a set of achromatic prisms（4）This set of achromatic prisms is a pair of equally dispersive Amish prisms, whose function is to obtain a certain dispersion when rotating with each other to offset the dispersion generated by the refractive prism on the measured object. Telescope objective lens（5）Concentrate this beam of light with different directions onto a dividing board（7）Above, there is a cross marking line on the dividing plate, which is passed through the eyepiece（8）You can see an image with a boundary between light and dark as shown in Figure 4.

2WAJShanghai WuxiangAbbe refractometerLight passes through a spotlight（12）Lighting scale board（11）Scale plate and swinging mirror（13）Connect as a whole and rotate around the center of the scale at the same time. Through a reflective mirror（10）Reading objective lens（9）Parallel prism（6）Image the refractive index readings of different parts on the scale plate onto the dividing plate（7）Up there