Light-emitting device having diffractive optical film on...

H - Electricity – 01 – S

Patent

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H01S 5/028 (2006.01) G02B 5/18 (2006.01)

Patent

CA 2474474

A light-emitting device having a practical, small diffractive optical film on the light emission surface is efficiently manufactured at low cost. The light- emitting device (LD) is provided with a diffractive optical film (DF) on the light emission surface. The diffractive optical film (DF) comprises a translucent DLC (diamond-like carbon) layer, and this translucent DLC layer includes a modulated refractive-index diffraction grating having a local region of a relatively high refractive index and another local region of a relatively low refractive index.

La présente invention a trait à un dispositif électroluminescent comprenant un film optique à diffraction pratique et de petite dimension sur une surface d'émission lumineuse capable d'être fabriqué à faible coût. Le dispositif électroluminescent est muni d'un film optique à diffraction sur une surface d'émission lumineuse. Le film optique à diffraction comporte une couche de dépôt CDA (carbone sous forme de diamant amorphe) translucide, et cette couche translucide de dépôt CDA comprend un réseau de diffraction à indice de réfraction modulé présentant une région locale d'un indice de réfraction relativement élevé et une autre région locale d'indice de réfraction relativement faible.

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