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

Patent metadata

Field	Value
Publication number	US-12228737-B2
Application number	US-202318207539-A
Country	US
Kind code	B2
Filing date	Jun 8, 2023
Priority date	Mar 18, 2016
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

An eyeglass lens for an optical imaging element for producing a virtual image of an initial image includes a main body and at least one complementary element mounted on the main body. The main body has a material with a first index of refraction n 1 . A viscous or solid intermediate layer is arranged between the complementary element and the main body at least in the region where the complementary element overlaps with a reflection section of the main body. The material of the viscous or solid intermediate layer has a second index of refraction n 2 that satisfies the condition n 2 <n 1 sin(θ E ). θ E is an angle of incidence of the light beams of the imaging beam path proceeding from the incoupling section and incident on the reflection section, selected such that at least 50% of the light beams of the imaging beam path have an angle of incidence of θ>θ E .

First claim

What is claimed is:

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 n 1 ,
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 n 2 , which satisfies the condition n 2 <n 1 sin(θ E ), where θ E 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>θ E ,
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 n 2 ,
wherein the layer adjoining the viscous or solid intermediate layer comprises the material having the first refractive index n 1 or a refractive index corresponding to the first refractive index n 1 , and
wherein the refractive indices of each of the plurality of layers increases proceeding from the layer adjoining the viscous or solid intermediate layer.

2. The spectacle lens of claim 1 , wherein the angle of incidence θ E is selected such that at least 75% of the light rays of the imaging beam path have an angle of incidence θ>θ E .

3. The spectacle lens of claim 1 , wherein the condition n 2 <n 1 sin(θ E ) is satisfied in the entire wavelength range of the imaging beam path.

4. The spectacle lens of claim 1 , wherein the condition n 2 <n 1 sin(θ E ) is satisfied in the entire visible wavelength range.

5. The spectacle lens of claim 1 , wherein the material of the viscous or solid intermediate layer absorbs less than 20% of the light rays of the imaging beam path.

6. The spectacle lens of claim 1 , wherein the at least one of said first corrective lens and second corrective lens has a third refractive index, which corresponds to the first refractive index.

7. The spectacle lens of claim 1 , wherein the viscous or solid intermediate layer is present in the entire region in which the at least one of said first corrective lens and second corrective lens is attached to the main body.

8. The spectacle lens of claim 1 , wherein a film or a shaped part is disposed between the viscous or solid intermediate layer and the main body or between the viscous or the solid intermediate layer and the surface layer of the main body.

9. The spectacle lens of claim 1 , wherein at least one of the viscous or solid intermediate layer and/or the material of the surface layer comprise an adhesive.

10. The spectacle lens of claim 1 , wherein the material of the viscous or solid intermediate layer is applied to a carrier material, which is applied to at least one of the inner surface and the outer surface of the main body.

11. An imaging optical unit for producing a virtual image of an initial image presented on an image generator, comprising at least one spectacle lens as claimed in claim 1 .

12. A pair of smartglasses, comprising at least one imaging optical unit according to claim 11 .

13. 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 n 1 ,
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 n 2 , which satisfies the condition n 2 <n 1 sin(θ E ), where θ E 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 comprise

Assignees

• tooz technologies GmbH

Inventors

• Puetz Joerg
• Davidkov Momchil
• Ettig Ramona
• Michels Georg
• Bartel Kai
• Kartal Ersun

Classifications

• G02C2202/16

  Laminated or compound lenses · CPC title

• G02C7/02

  Lenses; Lens systems {; Methods of designing lenses} · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title

• G02B2027/0123

  comprising devices increasing the field of view · CPC title