| 摘要 |
<p>The invention relates to devices, systems and methods for controlling the amount of light transmitted through an opening in a wall etc. from a source region to a receptor region and to the blockage of annoying light from specific directions relative to the opening. According to the invention there is provided d device for blockage of light transmission from a spatially confined light source, such as the sun, to a receptor region (7) in space, where said light source is located in a source region (6) on one side of the device and said receptor region (7) is located in the other side of the device, where the device comprises at least one three-dimensional body, such as a baffle or panel (1) and where the device is provided with a front surface (3) and a rear surface (4), the three-dimensional body (1) being of a predetermined thickness (t1) and where the three-dimensional body (1) is provided with a plurality of light directing means defining light transmission paths or channels from said front surface (3) to said rear surface (4) of the device, such that light transmission from said source region (6) to said receptor region (7) is substantially blocked when said light source transmits light towards the front surface (3) of the device from at least one given direction relative to the front surface (3) of the device. Two classes of embodiments of the above device are described termed LENTICULAR LENS EMBODIMENTS and LIGHT PASSAGES EMBODIMENTS, respectively.
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