Incandescent lamp with an absorption and interference filter

Details Incandescent lamp with an absorption and interference filter Incandescent lamp with an absorption and interference filter

G - Physics

02

B

G02B 5/28 (2006.01) H01J 61/40 (2006.01) H01K 1/28 (2006.01)

Patent

CA 2584462

The invention relates to an incandescent lamp for producing light in a red region of the spectrum, comprising: a translucent lamp bulb (4); a spiral- wound filament enclosed by the lamp bulb, and; an interference filter (8), which is placed on the lamp bulb and which has a number of optically low refractive layers and optically highly refractive layers. According to the invention, the lamp bulb itself forms an absorption filter that absorbs unwanted light spectra. The color location shift into the red region of the spectrum ensues via the interference filter.

L'invention concerne une lampe à incandescence pour réduire de la lumière dans un domaine spectral rouge, comprenant une ampoule (4) transparente, un filament boudiné entouré par l'ampoule et un filtre d'interférence (8) monté sur l'ampoule, qui comporte plusieurs couches à faible indice de réfraction optique et à fort indice de réfraction optique. Selon l'invention, l'ampoule constitue en soi un filtre d'absorption, qui absorbe des spectres lumineux indésirables, le déplacement de localisation chromatique dans le domaine spectral rouge s'effectuant à travers le filtre d'interférence.

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