Spectral-difference enhancing illuminant for improving visual detection of blood vessels

The goal of this study is to develop a functional illuminant which assists medical institution workers who use injection equipment. In this paper, the functional illuminant for supporting people in distinguishing blood vessels from skins was developed. This functional illuminant consists of three types of LEDs. The illuminant with various LED was simulated and the three types of LEDs are selected in such a way that the resulted illuminant emphasizes the color difference between skins and blood vessels. Moreover, we developed a prototype of this functional illuminant and tested it. The test shows that the functional illuminant can support people in distinguishing blood vessels from skins. Furthermore, our experiments suggest that the functional illuminant is robust to individual difference in skin color.