Ophthalmic lens having a projection insert
View Patent ↗An ophthalmic lens contains inserts ( 26, 28 ) for projecting an image towards the user's eye. The lens is treated by coating the surface order to attenuate light reflected on the treated surface from the inside of the lens. Coating the surface of the lens attenuates the parasitic images formed by rays reflected on the coated surface and projected by the insert.
1. An ophthalmic lens having
at least one insert for projection towards the user's eye, the insert being adapted to receive light propagated through the lens; and
a coating over at least part of at least one surface positioned to internally reflect light propagated through the lens to the insert, the coating attenuating said internally reflected light to reduce parasitic images.
2. The lens of claim 1 , wherein said surface is a surface of the lens away from the user.
3. The lens of claim 1 , wherein said surface is a surface of the lens directed towards the user.
4. The lens of claim 1 , wherein the coating covers two surfaces of the lens.
5. The lens of claim 1 , wherein the coating does not cover a part of the lens surface through which light is projected from the insert towards the user.
6. The lens of claim 1 , wherein further comprising a receiving insert adapted for receiving light coming from outside the lens and for projecting the received light towards the projection insert.
7. The lens of claim 6 , wherein the coating does not cover a part of the lens surface through which the light coming from outside the lens enters the lens.
8. The lens of claim 1 , wherein the coating comprises a pigmented coating near the lens surface.
9. The lens of claim 8 , wherein the pigmented coating is produced over a depth less than 50 μm from the surface.
10. The lens of claim 8 , wherein the pigmented coating is produced over a depth of 10 to 50 μm from the surface.
11. The lens of claim 1 , wherein the coating comprises an additional layer provided over a surface of the lens.
12. The lens of claim 11 , wherein the additional layer is colored.