Planar lenses for integrated optics

Details Planar lenses for integrated optics Planar lenses for integrated optics

G - Physics

02

B

G02B 6/32 (2006.01) G02B 27/30 (2006.01) G06F 3/046 (2006.01)

Patent

CA 2583749

A planar lens (30) which comprises a slab waveguide (36) and an optical waveguide (33), preferably formed in unitar fashion, wherein the slab waveguide has a curved end face (37) to focus light into or out of the optical waveguide, an wherein at least one additional lens (32) is included within the slab waveguide. The additional lens is either converging or diverging. The additional lens may match the acceptance angle of the optical waveguide to the curved end face of the slab waveguide. Alternatively it may improve the tolerance of the planar lens to design or assembly errors and/or temperature variations. Preferably, the planar lenses are composed of a photo-patternable polymer, and the additional lenses are composed of air.

L'invention concerne une lentille plane (30) comprenant un guide d'ondes plan (36) et un guide d'ondes optique (33) formé, de préférence, de manière unitaire, le guide d'ondes plan présentant une surface terminale incurvée (37) permettant de focaliser un rayonnement sur le guide d'ondes optique ou en dehors de celui-ci, au moins une lentille supplémentaire (32) étant comprise dans le guide d'ondes plan. La lentille supplémentaire est soit convergeante soit divergeante. La lentille supplémentaire peut correspondre à l'angle d'admission du guide d'ondes optique par rapport à la surface terminale incurvée du guide d'ondes plan. Un autre mode de réalisation concerne l'amélioration de la tolérance des lentilles planes, aux fins de conception ou de mise en commun d'erreurs et/ou de variations de températures. Les lentilles planes sont composées, de préférence, d'un polymère photo-structurable et les lentilles supplémentaires sont composées d'air.

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