| 摘要 |
FIELD: physics. ^ SUBSTANCE: analyser has an electronic measuring and recording part, a cuvette, a radiation source and a photodetector. The cuvette consists of top, middle and lower parts and a cover having a photoresistor mounted at its centre. The top part of the cuvette has a rectifying lens mounted at the centre of the top face and a convergent lens mounted at the centre of the lower face. The lower part of the cuvette has a divergent lens mounted at the centre of the top face and a radiator mounted at the centre of the lower face. In order to fix in the right position of the top part of the cuvette relative the middle part, guide pins are fitted on the diametrical surface of the lower face of the top part, wherein the top and middle parts of the cuvette are aligned using a mark on the outer cylindrical surfaces of the parts of the cuvette, the working surfaces of which are chromium plated and have conicity of 0.3-0.4. ^ EFFECT: invention increases reliability, sensitivity, accuracy, widens the range of measurements and simplifies the design of the device. ^ 3 cl, 2 dwg |
