DE19930846A1 - Artificial room lighting system has floor-mounted source near window radiating upwards to mirror; pivotable mirror deflects light onto ceiling at between 0, 60 degrees with microstructure - Google Patents

Abstract

The system has a floor-mounted source (A) near a window that radiates upwards towards a deflection mirror (B). The pivotable deflection mirror deflects the light onto the ceiling at an angle of incidence between 0 and 60 degrees with a microstructure. A microstructured ceiling can be used to deflect light incident obliquely on the window side onto a working surface.

Description

State of the art

Various types of ceiling constructions are known in the prior art. These include metal ceilings. These are sometimes called chilled ceilings used.

These ceilings are offered in a diffuse or reflective version. Recent developments in these materials are provided with microstructures for directing light (especially daylight). Such a material is shown in detail (A) in Fig. 1 (or Fig. 2). Another advantage of this material is the high cooling capacity when used as a cooling ceiling. This material was among others in the yearbook for light and architecture 1998 by Dr. Roman Fuchs presented.

These solutions are used to use daylight.

In lighting technology, there are often indirect lights with suspended Lights or with floor lamps. The advantages of floor lamps are mobility and doing without to the necessary electrical installations on the ceiling.

The disadvantage of using these light-guiding ceilings and floor lamps together consists of the mirror images of the lamps on the lamp that are created by the light-directing effect Blanket. This leads to unacceptable glare (e.g. screen workstations) So far, the only solution has been the use of direct radiation systems however, ceiling installations are necessary. The advantage of the mobility of the Floor lamps lost.

description

The floor lamp presented here eliminates the impairment of glare without the advantages of mobility and the absence of ceiling installations.

The lamp consists of a deflecting mirror ( Fig. 1 (B)) and a light source ( Fig. 1 (A)) with parallel or narrow beam radiation characteristics. The lamp is on the window front of the room. The deflecting mirror (B) is at a height (C) above the light source. The x-axis of the deflecting mirror is rotated from the vertical by the angle (D). This directs the light beams (E) against the ceiling. The ceiling (F) is characterized by a light-guiding function. A microstructured surface can be seen in detail (A), the structure size is less than one millimeter. As a result, the gloss angle of the entire surface is shifted by 60 ° at an angle of incidence of 30 °, so that the light is not reflected at the theoretical angle of 30 °, but at an angle of 90 °. As a result, the obliquely incident light is directed downwards onto the work surface. An incident light beam would have the theoretical angle of (G), but is deflected by the angle (H) due to the microstructure. The resulting light beam is shown in ( 1 ).

The illuminated ceiling area is determined by setting the angle (D). By the height (C) determines the maximum achievable room depth. However, this is too note that the height of the mirror (B) is above the eye area. Farther is illuminated by the height (C) in connection with the angle (D) on the ceiling Area determined.

In Fig. 2, the setting of the angle (J) made it possible to illuminate an area of the ceiling located deeper in the room. The flattest total exit angle (K) of the light is 60 °. Glare is therefore excluded, this lighting meets the requirements for lighting for VDU workstations.

Fig. 3 shows the top view of the room. With (L) you can see the lamp with a deflecting mirror on the window front. If the deflecting mirror of the lamp (L) is flat, only a small area (M) of the ceiling is illuminated. However, considering the glare, the greater width (N) of the ceiling should be illuminated. Different solutions are possible for this task.

An advantageous solution can be seen in Fig. 4. In the X-axis of the mirror (Q) it is bent around the center (O) with a radius (P). The mirror (Q) represents an arc segment which is extruded along the X-axis. The choice of radius (P) determines the expansion of the light cone into the room width.

The advantage of this construction is the possibility of using standard reflector material available.

Another advantageous embodiment of the deflecting mirror can be seen in Fig. 5. The expansion in the width of the room is realized by a micro-structured sinusoidal surface structure (R) of the deflecting mirror (S). The width of the fanning out of the light beam is set by the choice of the amplitude height (y-axis) and the period (z-axis). The advantage of this construction is the possibility to use a flat deflecting mirror.

Another advantage of this lighting concept is that the flexibility of the Illumination realized solely by adjusting the mirror in terms of angle and height can be. This enables a fixed location near the window.

Fig. 6 shows the diffraction of the angle of incidence (T) on the microstructure.

Claims (5)

1. Lighting system for artificial light, characterized in that a spotlight on the floor near the window ( Fig. 1 (A)) shines upwards on a deflecting mirror ( Fig. 1 (B)). 2. Lighting system for artificial light according to claim 1, characterized in that a pivotable deflecting mirror the light at an angle of incidence ( Fig. 1 (G _A )) between 0 ° and 60 ° ( Fig. 6 (T)) on the ceiling with a microstructure redirected according to Fig. 1 detail A. 3. Lighting system for artificial light according to claim 1, characterized in that a light guiding ceiling with a microstructure according to Fig. 1 Detail A is used for deflecting the obliquely incident light from the window side onto the work surface. 4. Lighting system for artificial light according to claim 1, characterized in that the light is fanned out in the room width by bending the deflecting mirror around the radius (R) ( Fig. 4). 5. Lighting system for artificial light according to claim 1, characterized in that the light is fanned out in the room width by a for example sinusoidal or sinusoidal square or similar microstructure ( Fig. 5 (R)).