Constant temperature polarimeter

Abstract

The invention provides a constant temperature polarimeter which mainly consists of a light source, two Nicol prisms, a polarization tube groove, a polarization tube and a controller; wherein the innerwall of the polarization tube groove is provided with a temperature sensor, electronic refrigeration pieces are evenly distributed around the polarization tube groove, and hot surfaces of the electronic refrigeration pieces arranged at the upper and the lower surfaces are arranged towards the outside of the polarization tube groove; exhaust fan holes are covered on the electronic refrigeration pieces, and no light passes through between the electronic refrigeration pieces and the polarization tube groove; the hot surfaces of the electronic refrigeration pieces arranged at the front and the back surfaces are arranged towards the inside of the polarization tube groove; a polyurethane insulation coating is positioned outside; when the temperature is set by the controller, the polarization tube is put into the polarization tube groove; when the room temperature is higher than the test temperature, the electronic refrigeration pieces are started for refrigeration, and an exhaust fan is used for heat dissipation; when being lowered to be the set temperature, the temperature in the polarization tube groove is read; when the room temperature is lower, the electronic refrigeration pieces are started for heating, and the temperature can be read when reaching the set value. The constant temperature polarimeter has the effect that the electronic refrigeration pieces are applied into the constant temperature test of the polarization tube, so that the test results are more scientific and reliable.

Description

technical field [0001] The invention relates to a polarimeter, in particular to a constant temperature polarimeter. Background technique [0002] As we all know, visible light is an electromagnetic wave with a wavelength of 380nm~780nm. Due to the statistical properties of light emitted by illuminants, the vibration direction of the electric vector of electromagnetic waves can take any direction perpendicular to the direction of light propagation, which is usually called natural light. Using some devices (such as polarizers), the vibration direction can be fixed in a certain direction perpendicular to the direction of light wave propagation, forming the so-called plane polarized light. When the plane polarized light passes through a certain substance, the vibration direction of the polarized light will be rotated by one Angle, this kind of substance is called optically active substance, and the angle through which polarized light is turned is called optical rotation. If pla...

AI Technical Summary

Problems solved by technology

[0006] However, most of the current polarimeters produced by most manufacturers are relatively old-fashioned WZZ type polarimeters, that is, automatic polarimeters. Although it is more convenient to read, there is no way to solve the problem of temperature changes. , there will still be a large error for temperature-sensitive substances