Modular multimodal device for dermatoscopy and video capillaroscopy: Front lens design and evaluation of the image quality of the prototype

Marchenko M.O., Krioukov A.V., Bykov A.А.

For Russian citation (Opticheskii Zhurnal):

Марченко М.О., Крюков А.В., Быков А.А. Модульное мультимодальное устройство для дерматоскопии и видеокапилляроскопии: расчет объектива фронтальной части и оценка качества изображения опытного образца // Оптический журнал. 2025. Т. 92. № 9. С. 92–105. http://doi.org/10.17586/1023-5086-2025-92-09-92-105

Marchenko M.O., Kryukov A.V., Bykov A.A. Modular multimodal device for dermatoscopy and video capillaroscopy: Front lens design and evaluation of the image quality of the prototype [in Russian] // Opticheskii Zhurnal. 2025. V. 92. № 9. P. 92–105. http://doi.org/10.17586/1023-5086-2025-92-09-92-105

For citation (Journal of Optical Technology):

Abstract:

Subject of study. Optical systems of front stop objective lenses and optical systems of eyepieces in the reverse ray path. Aim of study. Design the optical lens system of a modular multimodal device operating in the modes of visual dermatoscopy, digital dermatoscopy and video capillaroscopy, and its calculation technique. Method. Synthesis of a multimodal dermatoscope lens three-component basic schemes, constructed on the basis of isoplanatic surfaces using the optical system composition method. The synthesis also used an algebraic method for calculating optical systems based on the theory of third-order aberrations. Main results. An improved modular arrangement of the device is proposed. The requirements for the optical system of the dermatoscope lens are formed, and its synthesis is performed. A method for synthesizing basic front stop lens schemes is described and new scheme variants are obtained that expand the synthesis possibilities. Based on the calculation results, a prototype lens was made. Practical significance. The evaluation of the image quality of the calculated lens of the multimodal device and its prototype confirmed the ability of its operation in visual dermatoscopy mode in a certain range of positions of the doctor's eye, in digital dermatos-copy mode with a mobile phone camera and in video capillaroscopy mode with a special additional module. The general structure of the device arrangement is defined.

Keywords:

dermatoscopy, videocapillaroscopy, isoplanatic surfaces, compositional synthesis, basic and corrective lenses

Acknowledgements:

the study was carried out within the framework of the Scientific and Technological Centre of Unique Instrumentation of the RAS (project FFNS-2025-0008).

OCIS codes: 120.3890, 170.1470, 170.1870, 170.0110, 110.0180

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