Eyeglass lens for an optical imaging element, and augmented reality glasses

A spectacle lens for an imaging optical unit that produces a virtual image of an initial image presented on an image generator, the spectacle lens comprising:

• a main body, comprising
• an inner surface to face the eye;
• an outer surface to face away from the eye and a light guiding portion, which extends between an input coupling portion for input coupling an imaging beam path between the inner surface and the outer surface;
• and
• an output coupling structure for coupling the imaging beam path out of the main body and in which light guiding portion the input coupled imaging beam path is guided to the output coupling structure by reflection at at least one of a reflection portion of the inner surface and a reflection portion of the outer surface;
• and
• at least one complementary element attached to the main body, the at least one complementary element comprising a refractive corrective element located at the inner surface of the main body, and overlapping with at least one reflection portion of the inner surface of the main body,
• wherein the main body comprises, at least in a layer adjoining the at least one complementary element, a material with a first refractive index n1,
• wherein a viscous or solid intermediate layer is arranged between the at least one complementary element and the main body, at least in the overlap region of the at least one complementary element with the at least one reflection portion of at least one of the inner surface and the outer surface of the main body,
• wherein the viscous or solid intermediate layer comprise a material that has a second refractive index n2, which satisfies the condition n2<n1 sin(θE), where θE represents an angle of incidence of the light rays of the imaging beam path that emanate from the input coupling portion and that are incident on the reflection portion, the angle of incidence selected such that at least 50% of the light rays of the imaging beam path have an angle of incidence θ>θE,
• wherein the main body comprises a surface layer at least on a region of the light guiding portion,
• wherein the surface layer of the main body comprises a material with a refractive index gradient,
• wherein a lowest refractive index of the refractive index gradient does not differ from the first refractive index n1 by more than 5 parts per thousand, and
• wherein the surface layer is oriented such that, with the lowest refractive index, the surface layer adjoins the viscous or solid intermediate layer.

A spectacle lens for an imaging optical unit that produces a virtual image of an initial image presented on an image generator, the spectacle lens comprising:

• a main body, comprising
• an inner surface to face the eye;
• an outer surface to face away from the eye and a light guiding portion, which extends between an input coupling portion for input coupling an imaging beam path between the inner surface and the outer surface;
• and
• an output coupling structure for coupling the imaging beam path out of the main body and in which light guiding portion the input coupled imaging beam path is guided to the output coupling structure by reflection at at least one of a reflection portion of the inner surface and a reflection portion of the outer surface;
• and
• at least one complementary element attached to the main body, the at least one complementary element comprising a refractive corrective element located at the inner surface of the main body, and overlapping with at least one reflection portion of the inner surface of the main body,
• wherein the main body comprises, at least in a layer adjoining the at least one complementary element, a material with a first refractive index n1,
• wherein a viscous or solid intermediate layer is arranged between the at least one complementary element and the main body, at least in the overlap region of the at least one complementary element with the at least one reflection portion of the inner surface of the main body,
• wherein the viscous or solid intermediate layer comprise a material that has a second refractive index n2, which satisfies the condition n2<n1 sin(θE), where θE represents an angle of incidence of the light rays of the imaging beam path that emanate from the input coupling portion and that are incident on the reflection portion, the angle of incidence selected such that at least 50% of the light rays of the imaging beam path have an angle of incidence θ>θE,
• wherein the at least one reflection portion of the inner surface or of the outer surface of the main body comprises a free form,
• wherein the viscous or solid intermediate layer has a uniform thickness,
• wherein a capping layer is disposed on a side of the viscous or solid intermediate layer facing away from the main body,
• wherein the capping layer comprises the material of the main body or a material having a fourth refractive index,
• wherein the fourth refractive index does not differ from the first refractive index n1 by more than 5 parts per thousand, and
• wherein the capping layer has an optically plane spherical surface on a side thereof that faces away from the first intermediate layer.