Optical element having total reflection

G - Physics – 02 – B

Patent

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Details

G02B 17/00 (2006.01) F21V 5/02 (2006.01) F21V 7/10 (2006.01) F21V 13/04 (2006.01)

Patent

CA 2447529

An optical element (1) for reflecting and/or redirecting light rays (L1) entering therein and again emerging therefrom consists of a transparent base body (2) which is so structured and/or formed that, with the formation of reflection surfaces (8) bounding the base body (2), at least a part of the light rays (L1) impinging upon the reflection surfaces (8) upon emergence from the transparent base body (2) are totally reflected, and at least one cover body (9) arranged behind the reflection surfaces (8). The reflection surfaces (8), and the surfaces of the cover body or bodies (9) towards the reflection surfaces, are adapted to one another such that between them there remains a thin gap (10) or only point contacts exist.

L'invention concerne un élément optique (1) servant à réfléchir et/ou à dévier des faisceaux lumineux (L1) qui entrent dans ce dernier et ressortent de ce dernier. Cet élément optique est constitué d'un corps de base transparent (2) qui comprend des surfaces réfléchissantes (8) le délimitant et qui est structuré et/ou formé de sorte qu'au moins une partie des faisceaux lumineux (L1), frappant les surfaces réfléchissantes (8) lorsqu'ils sortent du corps de base transparent (2), soit totalement réfléchie. Cet élément optique est également constitué d'au moins un corps de recouvrement (9) placé derrière les surfaces réfléchissantes (8). Ces dernières (8) et les surfaces du ou des corps de recouvrement (9), orientées vers les surfaces réfléchissantes, sont adaptées les unes aux autres de sorte qu'une mince fente (10) demeure entre elles ou de sorte que seuls des contacts ponctuels existent entre elles.

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