US 12,228,737 B2
Eyeglass lens for an optical imaging element, and augmented reality glasses
Joerg Puetz, Aalen (DE); Momchil Davidkov, Aalen (DE); Ramona Ettig, Lauchheim (DE); Georg Michels, Aalen (DE); Kai Bartel, Lorch (DE); and Ersun Kartal, Aalen (DE)
Assigned to tooz technologies GmbH, Aalen (DE)
Filed by tooz technologies GmbH, Aalen (DE)
Filed on Jun. 8, 2023, as Appl. No. 18/207,539.
Application 18/207,539 is a continuation of application No. 17/460,102, filed on Aug. 27, 2021, granted, now 11,698,534.
Application 17/460,102 is a continuation of application No. 16/085,985, granted, now 11,131,853, issued on Sep. 28, 2021, previously published as PCT/EP2017/055730, filed on Mar. 10, 2017.
Claims priority of application No. 102016105060.1 (DE), filed on Mar. 18, 2016.
Prior Publication US 2023/0314814 A1, Oct. 5, 2023
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01); G02C 7/02 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/0055 (2013.01); G02C 7/02 (2013.01); G02B 2027/0178 (2013.01); G02C 2202/16 (2013.01)] 14 Claims
OG exemplary drawing
 
1. 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, comprising a first corrective lens arranged on the inner surface of the main body and a second corrective lens arranged on the outer surface of the main body,
wherein a corrective effect is divided between the first corrective lens and the second corrective lens,
wherein the main body comprises, at least in a layer adjoining at least one of the first corrective lens and the second corrective lens, a material with a first refractive index n1,
wherein said at least one of the first corrective lens and the second corrective lens overlaps with at least one reflection portion of the respective inner surface or the outer surface of the main body,
wherein a viscous or solid intermediate layer is arranged between the at least one of said first corrective lens and second corrective lens and the main body, at least in the overlap region of the at least one of said first corrective lens and second corrective lens with the at least one reflection portion of the respective inner surface or outer surface of the main body,
wherein the viscous or solid intermediate layer comprises 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 at least one layer, adjoining the viscous or solid intermediate layer, formed of a material having the first refractive index or a refractive index corresponding to the first refractive index,
wherein the surface layer of the main body comprises a plurality of layers,
wherein each of the plurality of layers comprise materials whose refractive indices are greater than the second refractive index n2,
wherein the layer adjoining the viscous or solid intermediate layer comprises the material having the first refractive index n1 or a refractive index corresponding to the first refractive index n1, and
wherein the refractive indices of each of the plurality of layers increases proceeding from the layer adjoining the viscous or solid intermediate layer.