The object of the invention is selective glass as defined in the preamble of claim 1, which type of selective glass can be used e.g. in residential buildings, leisure-time buildings, office buildings, commercial buildings and industrial buildings.

A drawback in the selective glasses known in the art is that they damp the passage of radio waves, because selective glass panes are surfaced with a metal coating/a coating comprising metal for improving the thermal properties of the building (or of the structure in which the selective glass is fitted). Damping of radio waves is detrimental and undesirable, because e.g. the audibility of mobile phones deteriorates or may be lost altogether owing to the selective glass.

The aim of this invention is to achieve an entirely new type of solution for selective glass, which continues to function efficiently while keeping the thermal properties of selective glass, but at the same time does not prevent or damp the passage of radio waves through the selective glass.

Brief description of the invention The selective glass according to the invention is mainly characterized in that the selective glass comprises one or more areas in which, for improving the penetration of radio waves, the surface of the selective glass is uncoated. The solution according to the invention is also characterized by what is stated in claims 2-10.

The solution according to the invention has a significant advantage in that it enables the penetration of radio waves through selective glass, but it does not significantly impair the thermal properties of the selective glass. Brief description of the figures

In the following, the invention will be described in more detail by the aid of an embodiment with reference to the attached drawings, wherein

Fig. la presents a side view of two consecutive panes of selective glass.

Fig. lb presents a side view of selective glass, wherein the coating in a certain area has been removed from two consecutive panes of selective glass.

Figs. 2a and 2b present a front view of selective glass, comprising an area/some areas in which the coating has been removed.

Detailed description of the invention According to what is presented by Figs, la and lb, the selective glass panes 4 ^' , A ^{' '} to be used in buildings, such as in residential buildings, leisure-time buildings, office buildings, commercial buildings and industrial buildings, comprise one or more areas 2 in which, for improving the penetration of radio waves, the surface of the selective glass is uncoated, i.e. in this area 2 the coating 3 has been removed e.g. by grinding or in some other way. In Figs, la and 2a-2b, the casement parts are marked with the reference number 5.

In Fig. lb, the selective glass panes 4, 4 ^' , 4 ^{' '} are fitted two or more consecutively (e.g. in the same window casement). There can be more than two consecutive panes of selective glass, depending on the application or usage site.

The uncoated areas 2 in the selective glass panes 4 ^' , A ^{' '} are preferably disposed at the same point with respect to each other, such as is presented in Figs, la and 1, but it is also possible that the areas 2 are at different points of the selective glass panes. The uncoated area is formed in the solution according to the invention on the inner panes of glass, preferably on the outer surface of the inner panes of glass as presented in the figures (the outermost glass pane is described with the reference number 4).

In the solution according to the invention the uncoated area is horizontal, vertical or inclined, and the uncoated area is line-shaped or lattice-shaped, but the uncoated area can also be e.g. of circular, triangular, rectangular or parallelogram shape, or of some other shape.

In the solution according to the invention the uncoated area can be e.g. one single (or more) elongated/line-shaped groove from which the coating of the selective glass has been removed. The uncoated area is formed e.g. on the bottom part and/or on the top part and/or on the side and/or in the center part of the selective glass pane. The size and shape of the uncoated area is connected with the frequency of radio waves. A reflecting means 6, which comprises at least one reflecting surface 7, is fitted in connection with the selective glass panes 4,4 ^' ,4 ^{' '} . The reflecting means 6 is fitted at a distance from the selective glass for bending the radio signals. The reflecting means 6 significantly improves penetration of radio waves through the selective glass, by bending radio signals to the correct angle for them to penetrate the selective glass as well as possible. In the figures the reflecting means is described with the reference number 6, and the reflecting surface of it with the reference number 7. According to Fig. la, the reflecting means can be fitted to the inside/outside of the selective glass panes, but it is possible that the reflecting means is on only one or the other side of the selective glass. In Fig. lb the reflecting means 6 is fitted to one or other side (the inside or outside) of the selective glass. In Figs. 2a and 2b, the reflecting means 6 can be e.g. above the selective glass, e.g. fixed to the casement part of the selective glass or otherwise at the side of the selective glass, as is presented in Fig . 2b.

The reflecting means can be fitted at the desired angle into connection with the selective glass, and the reflecting means can be of the type desired in terms of its shape, e.g . lath-type (flat/curved lath) or some other model, depending on each application. The reflecting means can also be fixed to the envelope of the building (to a wall of the building, et cetera) to which the selective glass is fitted . The reflecting means can comprise e.g. fixing rods, with which it can be fixed to the envelope of the building or to the casement of the selective glass.

The reflecting means can be of a metal material, such as aluminium, steel, et cetera, but it can also be formed from a combination of materials, i.e. it can also be a composite. The size of the reflecting means is not in any way limited, but instead it can be of the desired size depending on each application, e.g . the whole width of the selective glass. It is obvious to the person skilled in the art that the invention is not limited to the embodiments presented above, but that it can be varied within the scope of the claims presented below. The characteristic features possibly presented in the description in conjunction with other characteristic features can if necessary be used separately to each other.

In the solution according to the invention one or more panes of selective glass are fitted e.g. in a door or as a window of a build ing or in the facade/as the facade of a building, but this is in no way limited, but instead the selective glass can function in a building as a separate element or combined with another structure, always depending on the application and usage site.