Holographic glass is a transparent shading and light-guiding system consisting of a polymeric film with a holographic diffraction grating laminated between two glass panes. The system is composed of a film that contains the Holographic Optical Elements surrounded by adhesive lamination and sandwiched by two panes of any type of glass. In a step-by-step exposure process using coherent and monochromatic light (laser), the holograms are produced in patterns on a light sensitive surface (such as a thin dichromated gelatin film), which can have a maximum size of 1 x 2 m (39” by 79”). The pattern is specifically designed to deflect light coming from a defined range of angles, customized for each project conditions. The dimensions of an individual HOE range from 1 x 1 cm (.039” by .039”) to 10 x 10 cm (.39” by .39”). The movable shading components can be controlled either automatically by light and temperature sensors, or manually by the user.
Holographic glass panes act as shading and light deflecting systems, either fixed or installed on a sun-tracking element, to provide a better distribution of daylight in the room and a regulation of heat exchange through the building envelope.