Lighting device for installation in plane surface

Details Lighting device for installation in plane surface Lighting device for installation in plane surface

B - Operations, Transporting

64

F

B64F 1/18 (2006.01) F21S 8/00 (2006.01)

Patent

CA 2397701

A lighting device for installation in a substantially plane surface (101), comprising at least one lamp device (8) that emits light essentially in a light direction which forms an angle (.beta.) with a exit face (121) of a light refracting means (1) in the lamp device (8). The lamp device comprises a light source (107) that emits light towards an incident face (114) of the light refracting means (1), where the light refracting means (1) has a longitudinal direction coincident with the said light direction, and where the exit face (121) is approximately parallel to the substantially plane surface (101). The exit face (121) is set a slight angle of inclination (.gamma.) relative to the substantially plane surface (101), the angle (.beta.) and the angle of inclination .gamma. in combination causing light from the light source (107) to be brought to an emergent angle above the face (101) that satisfies pre-set requirements for light intensity close to the surface (101). A prism is also described wherein at least the edge formed between the exit face (121) of the prism and a side face (110) which forms an acute angle with the exit face (121) is rounded.

L'invention se rapporte à un dispositif d'éclairage conçu pour être installé sur une surface sensiblement plane (101), qui comporte au moins un dispositif lampe (8) qui émet une lumière principalement suivant une direction formant un angle (.beta.) avec une face de sortie (121) d'un organe réfringent (1) du dispositif lampe (8). Le dispositif lampe comporte une source lumineuse (107) qui émet de la lumière en direction d'une face incidente (114) de l'organe réfringent (1), ce dernier ayant un axe longitudinal coïncidant avec la direction de la lumière, et la face de sortie (121) étant sensiblement parallèle à la surface sensiblement plane (101). La face de sortie (121) est disposée de manière à former un angle faible d'inclinaison (.gamma.) par rapport à la surface sensiblement plane (101), l'angle (.beta.) et l'angle d'inclinaison (.gamma.) étant tels que la lumière issue de la source de lumière (107) est amenée à former un angle d'émergence au-dessus de la surface (101), qui satisfait les exigences préétablies pour l'intensité de la lumière à proximité de la surface (101). L'invention se rapporte également à un prisme dans lequel au moins une arête formée entre la surface de sortie (121) du prisme et une face latérale (110) formant un angle aigu avec la surface de sortie (121) est arrondie.

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