Realization of infrared display images using infrared laser projection method

In general, infrared (IR) images are generated based on the temperature distribution of the objects of interest by detecting the thermal IR radiation emitted from these objects with the help of sensors. However, the generation of information-specific IR images can enable "intelligent" entities such as autonomous vehicles and artificial intelligence robots with IR detection features to use IR images for exchanging information. In this context, here, we examine a method of realizing IR-image-based information using IR laser projection. With our approach, two- and three-dimensional IR images could be generated by converting near-IR rays to far-IR rays based on the heat generated by a laser. Importantly, the IR signals do not adversely affect humans or interfere with electronic devices. The proposed IR display can be used to exchange specific information among IR-detection-enabled entities without being detected by the human eye. Therefore, it is expected to overcome the problem of light pollution due to the indiscriminate use of displays and human-health-related problems arising from the exposure to electromagnetic wave-based information transmission.