The subject of the research is colour measuring instruments. The aim of the work is to classify colour measuring instruments and the fields of colorimetry. The methodology and methods of the research are based on the basic concepts, principles and methods of scientific research, such as the principle of systematicity, the principle of cause-and-effect relationships, methods of a systems approach and comparative analysis, and the intellectualization of information processes. The research is based on classification as a method that allows for the description of a multi-level, branched system of elements and their relationships. As a results: the classification of spectral and integral colour measuring instruments for non-luminous colour objects can be compared with the classification of optoelectronic devices and systems. However, in modern realities, some adjustments are necessary. Therefore, the author's classification was proposed. Also, based on the research, a classification of systems, types, and devices of technical colorimetry is presented. Practical significance of the work is that classification was prepared in such a way as to create the most comprehensive overview of the main technical colorimetric systems, devices, and instruments; explain the difference between a colour space and a colour system; consider the methods of colour registration. The presented material should help researchers, using colour digital recorders in their experiments, eliminate colour loss and, consequently, measurement errors already at the recording stage. 1. Yoshi Ohno. CIE Fundamentals for Colour Measurements // IS&Ts NIP16: 2000 International Conference on Digital Printing Technologies, 2000. pp. 540–545. DOI:10.2352/ISSN.2169-4451.2000.16.1. art00033_2
2. Zhbanova, V.L. Features of digital colorimetry application in modern scientific research // Light & Engineering, 2021, Vol. 29, # 3, pp. 146–158. DOI: 10.33383/2021-028
3. Schults, E.V., Monogarova, O.V., Oskolok, K.V. Digital Colorimetry: Analytical Possibilities and Prospects of Use // MOSCOW UNIVERSITY CHEMISTRY BULLETIN, 2018, Vol. 74, # 2, pp. 55–62. DOI: 10.3103/S002713141902007X
4. Meshkov, V.V., Matveev, A.B. Fundamentals of Lighting Engineering. Part 2. Physiological Optics and Colourimetry. 2nd ed. [Osnovy svetotehniki. Ch. 2. Fiziologicheskaya optika i kolorimetriya. 2‑e izd.] / Moscow: Energoatomizdat, 1989, 432 p.
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9. Lozhkin, L.D., Voronoy, A.A., Soldatov, A.A. Transformation of the CIE colour space into a strictly uniform colour spase based on tensor calculus [Preobrazovanie cvetovogo prostranstva MKO v strogo ravnokontrastnoe na osnove tenzornogo ischisleniya] // Physics of wave processes and radio engineering systems, 2016, Vol. 19, # 4, pp. 50–59.
10. Zhbanova, V.L. Research into Methods for Determining Colour Differences in the CIE LAB Uniform Colour Space // Light & Engineering, 2020, Vol. 28, # 3, pp. 53–59. DOI: 10.33383/2019-005
11. Zhbanova, V.L. Evaluation and selection of colour spaces for digital systems // Light & Engineering, 2020, Vol. 28, # 6, pp. 86–94. DOI: 10.33383/2020-024
12. Zhbanova, V.L. Development and research of optical-electronic colour separation systems for matrix photodetectors [Razrabotka i issledovanie optikoehlektronnyh sistem cvetodeleniya dlya matrichnyh fotopriemnikov] / Dissertation, Moscow, 2015, 124 p.
13. Yakushenkov, Yu.G. Theory and calculation of optical-electronic devices [Teoriya i raschet optiko-ehlektronnyh priborov] 4th ed. / Moscow: Logos, 1999, 480 p.
14. Parvulyusov, Yu.B., Rodionov, S.A., Soldatov, V.P., Shekhonin, A.A., Yakushenkov, Yu.G., Yakushenkov, Yu.G. Design of optical and electronic devices [Proektirovanie optiko-ehlektronnyh priborov] / A textbook for universities 2nd ed. M.: Logos, 2000, 488 p.
15. Shchetinin, E. Yu. Model for detecting objects in infrared images obtained by unmanned aerial vehicles [Model' obnaruzheniya ob"ektov v izobrazheniyah infrakrasnogo spektra, poluchennyh bespilotnymi letatel'nymi apparatami] // Applied Informatics, 2025, Vol. 20, # 1, pp. 16–27. DOI: 10.37791/2687-0649-2025-20-1-16-27

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• colorimetry
• classification
• colour
• chromaticity
• receiver
• digital device
• matrix photodetector