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System Performance | System Description | Case Study |
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System Performance
Laminated glass and transparent Holographic Optical Elements (HOEs) makes up a system that can redirect light . In a fixed configuration, the system reduces daylight in the room area closest to the window but increases it slightly in the deeper parts of the room. When incorporated in a sun-tracking device, direct sunlight is effectively shielded from entering the space while incident light from other angles is able to pass through and to contribute to produce a more uniform and soft illumination of the space. On the other hand, the integration of glass panels with light-redirecting holograms allows solar energy to be used for daylighting, for heating and for photovoltaic power generation. In this configuration, the holographic film will redirect and concentrate sunlight in some areas and convert it into electricity or thermal power. Direct sunlight must be avoided within the active angle of the element because it would provoke glare and color dispersion. Other than that, the level of transparency is very high, which allows for clear visibility through the whole active area of the system. For a more advanced lighting analysis and project specific results, we recommend using the Lightsolve program (under development).
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Performance data for all systems in the same category. Comparison to systems in other categories, selected through the matrix filtering process.
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System Description
Sax3D 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. |
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