http://www.theengineer.co.uk/Articles/Article.aspx?liArticleID=294390
"A Russian biometric data-controlled turnstile can allow or deny access based on a rapid 3D infrared scan of users’ faces. The device looks like a traditional “three-fingered” turnstile as used in public transport stations and sports arenas, but equipped with a small screen. A series of parallel infrared rays are aimed at a person’s face as they approach. An infrared camera records the unique way the light bends around the face and transmits the image to a PC. The PC then builds a precise 3D image from the contours, identifies it by comparing with a database and opens or closes the turnstile. It can simultaneously perform additional tasks, for example recording an employee’s arrival or departure time."
