| 摘要 |
A two-beam interferometer designed to control changes of optical density of solutions Jamina type, equipped with a laser serving as a source of light and a system of lenses for forming a beam of radiation and an eliminator of coherent noises, together with a gap diaphragm, contained between those lenses, characterised in that it has an eliminator of coherent noises in a form of a rotating parallelepiped plate, made of a uniform and transparent material, preferably of a non-organic glass.<IMAGE>
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