behind the seen
This prototype is based of a projection which is invisible for human eyes. The use of your smartphone camera as an auxiliary helper is necessary to get the informations visible. Technologically is this solved by controlling of an infrared laser beam with two mirrors for the vertical and horizontal deflexion.
Thematically is this project categorized to hidden messaging but why do we see the projection with a little help of a smartphone camera? It’s easy to explain. It depends on the side effect of Bayer-Filter which is attached on almost every CMOS-Sensor to reduce artifacts due to infrared light. The filter owns a transition section which allows to pass a certain wavelength of IR-light. We’ve been invited to show the prototype at the International Year of Light 2015 closing event in Berlin.