SIMEKS

The main difference between this set-top box and the universal set-top box of the NPVO and ZDO is that a prism is used as a working element of the MNPVO, which allows to obtain several reflections from the area of contact with the sample under study, which leads to an improvement in the quality of the spectrum and an increase in the sensitivity of the method (absorption bands become more pronounced). The registration of specular and diffuse reflection spectra (ZDO) is not provided on this set-top box. The MNPVO prefix is effective in registering the absorption spectra of samples whose dimensions (number) are sufficient to ensure contact with the entire area of the working face of the prism: * liquids of any degree of viscosity (solutions, suspensions, oils, etc.); * solid elastic samples (polymer fragments of sufficiently large size, rubbers, plastics, etc.); * powdered samples in quantities sufficient to be applied to the entire surface and samples in the form of thin tapes; The universal clamp is equipped with a precision lever mechanism for quickly lowering the tip and a micrometer screw that allows you to pre–set the optimal degree of pressure - this ensures quick sample change and repeatability of the results during measurements. For convenience when working with liquid and paste-like samples, it is possible to rotate the clamping console by 180o. Note: the MNPVO prefix does not exclude the possibility of registering the spectra of samples whose dimensions are smaller than the area of the working face of the prism (the presence of a visual inspection system of the surface under study increases convenience when working with small-sized objects), but the overall effectiveness of the method is significantly lower than when using the universal NPVO and ZDO prefix. Transmission in the operating range of the spectrum, % of the input signal of at least 25 · The recommended number of scans when registering spectra is 25 · Spectrum registration time at 25 scans (resolution 4 cm-1), 30 seconds · The depth of penetration of radiation into the sample, microns 5 – 15 · Minimum area of a solid sample, mm2 1 · Minimum volume of the test liquid, ml 0.3 · The permissible pH range of the analyzed objects is from 5 to 9 · Crystal substrate material ZnSe CVD, Ge · Diameter of the focus spot, mm 3 · Number of reflections 3 · The size of the working face of the prism, mm 21 X 6 · Magnification of the 4X micro lens · Total magnification of the visual channel 75X · Field of view of the optical system, mm 2 X 2.5 · Digital video camera resolution 640 X 480 · Overall dimensions, mm 145×125×240 · Weight, kg 2

Designed for the study of various types of solid samples, including optical and semiconductor materials, precious stones and other objects of arbitrary shape • The sample is located on the subject plane of the investigated surface downwards, the angle of incidence of the central beam on the sample is 15 ° • Allows you to examine samples of small sizes (the diameter of the test area is from 1 mm) • The set-top box is equipped with a set of replaceable diaphragm holders for samples of different sizes • When using a mini-press, it allows you to examine samples in the form of a thin layer rolled out on a mirror plate made of alloy steel (radiation passes through the substance layer twice, reflecting from the mirror surface) • Not used: for the study of bulk and liquid substances