| 摘要 |
The invention relates to measuring engineering and can be used for determination of index of refraction of optically transparent liquids or materials, this can be used in oil processing, chemical and food industries, in biology, medicine and other areas of national economy. Digital refractometer includes placed in sequence at optical axis source of optical radiation, focusing lens, diaphragm and first concave lens, connected in sequence photo-receiver and analog-digital transformer, local bus, random access and permanent memory devices, measuring-registration device and micro-controller. Micro-controller through local bus is connected to random access and permanent memory devices, and to measuring-registration device and common bus. To device additionally are included semi-transparent plate, three reflecting mirrors, rectangular optical prism, second and third concave lenses, and grey wedge and two component parallel sided plates that are rigidly connected to three transformers “code-displacement”, and Abbe prism, this consists of two triangular prisms and two rectangular optical prisms that are placed in pairs at opposite sides of cuvette for liquid with parallel-sided walls. Abbe prism is optically connected to source of optical radiation and through respectively connected elements – to photo-receiver. Transformers “code-displacement” and analog-digital transformer are connected through common bus to micro-controller. In digital refractometer due to automated correction of errors increase of accuracy of measurement of index of refraction of liquids under investigation and optically transparent materials is provided. |
