Abstract: The invention relates to a planar preliminary product for producing focusing light-directing slats having a top side and an underside. The top side and the underside are the largest sides in terms of area. The top side has a groove structure having parallel grooves and ridges in a longitudinal direction and having a multiplicity of sidewalls F1 and F2. A respective pair of sidewalls F1 and F2 forms a common ridge projecting on the top side. The sidewalls F1 and F2 are in each case at an angle with respect to one another which is at least approximately constant along the transverse direction and longitudinal direction of the groove structure. The top side has an overall contour defined by the vertices of the ridges. The sidewalls F1 and F2 of adjacent pairs are at an angle ? with respect to one another.

Abstract: Light guiding slat for a sun protection system, wherein the light guiding slat is made of a band material equipped with a Fresnel reflector made by folding and/or bending the band material whereby the light guiding slat has a total height (G) which is so small that the light guiding slat has a form to be coilable with a coiling radius of 1 m or less without any substantial plastic deformation.

Abstract: Light guiding slat for a sun protection system, wherein the light guiding slat is made of a band material equipped with a Fresnel reflector made by folding and/or bending the band material whereby the light guiding slat has a total height (G) which is so small that the light guiding slat has a form to be coilable with a coiling radius of 1 m or less without any substantial plastic deformation.

Abstract: The flight guiding blinds of this invention are characterized in that the tooth sides showing towards sun incidence have an angle of inclination ? essentially smaller in the area of the irradiation portion and larger at a larger distance from the irradiation portion, and the angles of inclination ? increase following a concave curve path increasingly ascending from the irradiation area towards the reflection area, and at the upper side of light guiding blinds retro-reflected reaction is concentrated and a concentration zone is formed near irradiation portion and the concentration zone is disposed either in front of blind in the irradiation portion and/or on the underside of upper blind behind the irradiation portion, and on the upper side of a light guiding blind light radiation may be reflected at the individual teeth at and angle ?R<?S.

Abstract: The present invention relates to lamellae for light deflection and for scattering radiation, particularly sun radiation. The lamellae comprise two portions wherein the first portion is graded like stairs. It serves for scattering sun radiation. The second portion is oriented towards the interior space and is preferably convexly arched ascending towards the interior space. Sun radiation impinging onto the second portion is deflected to the ceiling of the interior space and into the space depth. The tread-board and the second lamella portion are disposed at an angle &OHgr; relative to each other.