Column lighting device

Abstract

Lighting device of the column type, comprising a support structure (1) provided at the top thereof with an optical space (3), a housing (5) for at least one light source (7) arranged inside the optical space (3), a light passage screen (9) that makes the side surface of the optical space (3), a cap (11) of opaque material arranged on top of the optical space (3), the side wall (13) of the cap (11) covering at least partly the transparent screen (9), and at least one reflector screen (17) with curved section, with concavity facing downwards, arranged inside the optical space (3). The bottom portion of the side wall (13) of the cap (11) exhibits an enlarged outer edge (21) which operates in combination with the light absorbing means present inside the optical space (3) for screening all the light beams emitted above the horizontal plane passing through the centre of gravity of the transparent portion of the screen (9) and / or for deviating the light beams emitted by the light source (7) and reflected by the reflector screen (17) downwards.

Description

technical field [0001] The present invention relates generally to lighting devices and in particular to a column lighting device of the so-called "bollard" type. Background technique [0002] Column lighting fixtures (called "bollard-type" due to their special shape resembling a bollard) can be divided into two product categories: those in which the light source is visible and those in which the light source is shielded from the observer. [0003] It is known that cylindrical luminaires of the first category have the problem of possibly dazzling the observer, whereas luminaires of the second category have a very low luminous performance, since the shield absorbs a considerable part of the light radiation. [0004] In order to solve these problems, in the Italian patent application No.MI2005A000595, the same applicant discloses a cylindrical lighting system with a light source inside and an external top cap or cover which is at least partially Covering side shields that allo...

AI Technical Summary

Problems solved by technology

[0006] In order to adjust to the latest standards regarding the reduction of light pollution, it should in fact be known that lighting devices like the ones described above have the disadvantage of emitting too much light when the part of the transparent side shield not covered by the top cap is particularly wide

[0007] On the other hand, when the height of the transparent shield is simply reduced by the top cap in order to limit the light emission, or when the cap is provided with a longer protruding shroud covering the entire transparent shield, the efficiency of the lighting device itself relative to the The amount of light emitted by the light source will be reduced too much

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