Optical system for transmitting a source image

Patent metadata

Field	Value
Publication number	US-11693241-B2
Application number	US-201816955033-A
Country	US
Kind code	B2
Filing date	Nov 21, 2018
Priority date	Dec 18, 2017
Publication date	Jul 4, 2023
Grant date	Jul 4, 2023

Abstract

An optical system for transmitting a source image includes a light guide, which defines a light transmission channel, an optical coupling arrangement and an optical decoupling arrangement, the coupling arrangement being designed to couple light emerging from the source image into the light guide arrangement in such a way that the light can propagate in the light guide arrangement by total reflection, and the decoupling arrangement being designed to decouple light that has propagated in the light guide arrangement from the light guide arrangement. The light guide arrangement comprises an optical deflection device, which, as viewed in the direction of propagation of the light in the light guide arrangement, is arranged between the coupling arrangement and the decoupling arrangement and is designed to deflect light ray bundles, emerging from the coupling arrangement at different beam angles and impinging divergently on the deflection device, in bundled manner towards the decoupling arrangement.

First claim

The invention claimed is:

1. An optical system for transmitting a source image, comprising a light guide that defines a light transmission channel, the light guide comprising:
an optical input coupling, and
an optical output coupling,
wherein the input coupling is configured to couple light emanating from the source image into the light guide such that the light can propagate in the light guide by way of total-internal reflection, and
wherein the output coupling is configure to couple the light that has propagated in the light guide out of said light guide,
an optical deflector comprising a plurality of mirrors, which as seen in a direction of propagation of the light in the light guide, disposed between the input coupling and the output coupling, the optical deflector configured to deflect light beams that emanate from the input coupling different beam angles, which are incident on the optical deflector in a divergent fashion, to the output coupling in focused fashion,
wherein the mirrors are angled mirrors that are disposed along a circular line segment.

2. The optical system of claim 1 , wherein the optical deflector is configured to deflect the light beams, which are incident thereon, such that an angle between the incident and deflected light beam is the same for all light beams.

3. The optical system of claim 1 , wherein the optical deflector is a pupil relay optical unit, which images a source image-side entry pupil onto an eye-side exit pupil.

4. The optical system of claim 1 , wherein the optical deflector is embedded in the light guide.

5. The optical system of claim 1 , wherein the optical deflector is disposed adjacent to an edge of the light guide.

6. The optical system of claim 5 , wherein the optical deflector is disposed at any one or more of an upper, a lower, a nasal and a temporal edge of the light guide when the optical system is worn on a user's head.

7. The optical system of claim 1 , wherein the mirrors are angled mirrors, and wherein apex sections of the angled mirrors are cut off or that unused regions of the angled mirrors are non-reflective, or both cut off and non-reflective.

8. The optical system of claim 1 , wherein the mirrors are angled mirrors that include a coating that is angle-selective in respect of reflection by the mirrors.

9. The optical system of claim 1 , wherein the mirrors are angled mirrors that have a minimum width of 0.5 mm on an open side thereof.

10. The optical system of claim 1 , wherein the mirrors are angled mirrors that have different orientations from one another, said different orientations being adapted to beam angles of the incident light beams.

11. The optical system of claim 1 , wherein the angled mirrors are disposed or oriented such that points of intersection of light rays incident on the angled mirrors and reflected by the angled mirrors are located on a circular line segment.

12. The optical system of claim 1 , wherein the light transmission channel is a first light transmission channel for transmitting a first partial field of the source image and the light guide comprises a second light transmission channel that transmits a second partial field of the source image, wherein the optical deflector comprises a first deflection part assigned to the first light transmission channel and a second deflection part assigned to the second light transmission channel.

13. The optical system of claim 1 , wherein the input coupling includes at least one mirror or diffractive structure.

14. The optical system of claim 1 , further comprising a display, which provides the source image, and a collimator that directs the light emanating from the source image onto the input coupling.

15. A pair of smartglasses, video glasses or a head-up display comprising the optical system of claim 1 .

Assignees

• tooz technologies GmbH

Inventors

• Hillenbrand Matthias
• Dobschal Hans-Juergen
• Degen Artur
• Muenz Holger

Classifications

• G02B27/0103 Primary

  comprising holographic elements · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G02B2027/0174

  holographic · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B5/12

  Reflex reflectors · CPC title