In a groundbreaking development, a team of engineers at The Barcelona Institute of Science and Technology’s ICFO–Institut de Ciències Fotòniques has introduced a nearly transparent camera designed for eye tracking applications. This innovative camera aims to address the issue of obstructing the user’s view, which has been a major hurdle in the advancement of eye tracking technology for various applications.
The research team in Spain devised a unique approach to creating this transparent camera by developing a photodetector using lead sulfide dots on graphene sheets. This photodetector operates by emitting electrons when struck by photons, allowing a current to flow across the layer of carbon atoms. What sets this camera apart is its near invisibility, allowing 95% of light to pass through it and ensuring minimal obstruction to the user’s view.
After conducting tests involving the projection of greyscale patterns onto the photodetector, the researchers were encouraged by the results. The nearly transparent camera demonstrated a refresh rate of 400Hz, surpassing the requirements for producing reliable imagery. Additionally, the team simulated eye tracking by projecting a dark dot onto the photodetector and successfully tracked the movements in real-time.
Challenges and Future Prospects
While the potential applications of this innovative camera are significant, the researchers acknowledge that further refinement is necessary before it can be implemented in devices such as standard eyeglasses or contact lenses. One of the primary challenges is the absence of a lens in the photodetector, limiting its functionality to projected images. Furthermore, there is a need to optimize image processing capabilities and incorporate a power source for the processor to ensure sustained performance.
Overall, the development of a nearly transparent camera for eye tracking represents a remarkable breakthrough in the field of technology. By overcoming the limitations of traditional devices that obstruct the user’s view, this innovative camera paves the way for enhanced applications in virtual reality, automotive assistance, and advertising tracking. While there are hurdles to overcome in terms of practical implementation, the potential benefits of this transparent camera are undoubtedly promising for the future of eye tracking technology.