A PC BASED POLARIMETER BASED ON MALUS' LAW

摘要

A PC based Polarimeter based on Malus' law comprising of a polarizer (P) and an analyzer (A1), arranged on a common axis so that their transmission axes are parallel. Linear polarized light passes through the analyzer (A1). The transmission axis of the analyzer (A1) is parallel to this wave. When an optically active substance (ST) is placed between the polarizer (P) and analyzer (A1 ), the polarization plane of said linear polarized beam has an angle relative to the transmission axis of analyzer (A1). The linear polarized monochromatic light is divided into two equal parts by a beam splitter (BS1) after passing through said optically active substance (ST). One part of the light passes straightly through the analyzer (A1), which is parallel to the polarizer (P). Since the analyzer (A1) is always kept fixed, the optical rotation can be evaluated. The second part of the light reflected from the beam splitter (BS) at 90 deg is passed through a second analyzer (A2) positioned at 45 deg with respect to the polarizer (P) and the intensit is measured and analyzed.