Polarimeter Holmarc

Product Description

Holmarc manufactures automatic digital polarimeters for industry and research with robust performance and efficiency. Symmetric angular oscillation optical null technique by faraday modulation is implemented in our polarimeters to achieve high resolution and repeatability. Operation is simple: place the sample filled tube in the automatic polarimeter and press read button. Measurement is displayed on the soft colour lcd display of the instrument.

The polarimeter is used for determining the optical rotation of substances. By measuring optical rotation, the concentration, content, purity etc of the sample solution can be found out. Polarimeter has become one of the most useful instruments in research laboratories of sugar industry, pharmaceutical industry, oil refining, food industry, chemical industry as well as basic research in universities and r&d organizations.

Major modules in our polarimeter include light source, interference filter, polarizer, faraday modulator, sample chamber, analyzer and detector. Unpolarized light from light source (led) passes through an interference filter and polarizer so that a fixed wavelength polarized light comes out. This polarized light enters the faraday modulator and then passes through the sample cell. The modulated light which passed through the sample cell enters a second polarizer, known as the "Analyzer,  which detects the angle of rotation. Finally, the light falls on a silicon photo diode which converts the light intensity to an electric signal.