## 4 Conclusions  
The results of the conducted research allow us to conclude the following:  
* The most gentle force impact of separating surfaces on the data recorder is at the circumferential speed of the roller conveyer belt V\({}_{\text{EL}}\) = 1.4 m/s, where throughout the technological process of influence, the minimal force impact on the separated products is observed. It is in the range of 3 N to 6.5 N, which is 28-31% of the maximum force impact of the working units of harvesters at speeds of 1.8 and 2.2 m/s;
* The technique for obtaining and processing spectral images of different lesion types of the three potato varieties of Zhukovsky, Udacha, and Kumach from the Lorch Federal Potato Research Center (Moscow) collection was developed;
* To record fluorescence spectra, a pulsed Nd: YLiF4 diode-pumped solid-state laser (Laser Compact, DTL-319 QT: 527 nm, 5 ns, 1 kHz, 200 \(\mu\)J/imp) was developed and presented;
* Spectral and hyper-raster signs of potato tissue lesions were determined. They are specific to remote optical monitoring methods with separation of the tuber cuts based on the analysis of signal intensity along different spectrum lines (the white background had almost the same intensity of reflection along all spectrum lines);
* The change in the wavelength pumping intensity in the wavelength range from 600 to 750 nm, corresponding to a damage value of 2 to 24 N ranging from a minimum of 80 (at the full damage range of 2 to 24 maximum) to a maximum of pumping intensity of 443, corresponds to a fluorescence spectrum with a clear separation of their boundaries. Thus, the express diagnostic method using the RAMAN lidar at the stages of postharvest handling of potato tubers, to sort out the damaged tubers before storing, excludes infectious diseases that can cause functional disorders in the potato tubers, externally manifested, most often, by darkening or brown discoloration of tissues. Therefore, the use of lidar can assess damage to potato tubers during storage with the determination of damaged volumes of tubers not suitable for storage, applied when harvesting different varieties of potato tubers by working bodies after appropriate calibration of the lidar in the complex of laboratory research, with a device for evaluating the suitability of varieties and hybrids for mechanized harvesting. The results of the studies carried out make it possible to ensure the use of RAMAN lidar at the stages of postharvest processing of potato tubers, before storing them in order to exclude the processes of decay of damaged potato tubers as a result of an express assessment of the state of tubers according to the developed method and according to the results obtained. The introduction into the production of which, requires further research in terms of expanding the database of damaged potato varieties and their reflection spectra. Conceptualization, Y.L., A.D. and A.A.; methodology, A.S. and M.G. ; software, N.S. and M.M. ([PERSON]); validation, A.D.; investigation, A.A.; resources, M.G. ; writing--original draft preparation, N.S. and M.M. ([PERSON]); writing--review and editing, A.S.; project administration, A.A.; funding acquisition, A.D. All authors have read and agreed to the published version of the manuscript. This work was supported by a grant from the Ministry of Science and Higher Education of the Russian Federation for large scientific projects in priority areas of scientific and technological development (grant number 075-15-2020-774). Not applicable. The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation. Under the proposed basic scheme, the developed device's calibration to modern potato harvesters will make it possible to carry out the directed selection of varieties suitable for mechanized cultivation.