Design of a multispectral device for noninvasive vein visualization with projection onto the skin surface

Subject of study. A two-channel optical system for vein morphology imaging and projection of binary vein maps onto the skin surface is studied. Aim of study . The aim of this work is to develop an optical system for a universal device for noninvasive vein detection and visualization, including multispectral image acquisition. Method . Synthesis of the base optical system was based on the algebraic synthesis method. Parametric synthesis was then performed by mathematical optimization of the design parameters. Main results . A two-channel optical system with a shared optical element and negligible geometric image distortions is proposed. The choice of illumination wavelength for the registration channel was verified. A multispectral design of the registration channel capable of acquiring spectral images in snapshot mode is proposed. A methodology for dimensional synthesis, including the design of the multispectral registration channel, was developed and used to design the complete optical system. Practical significance . The proposed two-channel system can be used in a variety of medical applications requiring visualization of vein morphology, including detection of vascular obstructions and preoperative preparation. When combined with effective algorithms for calculating multiwavelength index images, the multispectral design enables reliable vein morphology imaging in patients with darker skin tones.