Colour image protection apparatus

G - Physics – 02 – B

Patent

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Details

G02B 5/26 (2006.01) F21S 8/00 (2006.01) F21S 10/00 (2006.01) F21S 10/02 (2006.01) F21V 9/10 (2006.01) G02B 5/20 (2006.01) G02B 5/28 (2006.01) F21P 5/02 (1995.01)

Patent

CA 2142619

A transparency intended fox use in a high intensity tight beam projector for stage lighting purposes, comprises a glass substrate (10) having selected areas (11) thereof coated with a multi-layer dielectric coating forming a dichroic colour filter. Selective coating is effected either by removing parts of an overall multi-layer coating through a mask, or by applying the multi-layer coating selectively through a mask.

Un transparent conçu pour s'utiliser dans un projecteur à faisceau lumineux à intensité élevée, dans le but de réaliser un éclairage de scène, comprend un substrat en verre (10) possédant des zones sélectionnées (11) pourvues d'un revêtement diélectrique à couches multiples formant un filtre couleur dichroïque. On effectue le revêtement sélectif, soit en enlevant des parties d'un revêtement global à couches multiples à travers un masque, soit en appliquant sélectivement le revêtement à couches multiples à travers un masque.

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