# US 2022/0035166 A1 · Holographic optical elements for augmented reality devices and methods of manufacturing and using the same

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- Number: US 2022/0035166 A1
- Document ID: US20220035166A1
- Status: Published application
- Kind: A1
- Application number: 17/500,137
- Filed: 2021-10-13
- Published: 2022-02-03
- Earliest claimed: 2018-09-24
- Assignees: Intel Corporation
- Applicants: Intel Corporation
- Inventors: Jonathan Masson; Eric Tremblay; Lucio Kilcher; Mickael Guillaumee
- Web page: https://patentgrep.com/patent/US20220035166A1

## CPC

- G03H 1/0465: {Particular recording light; Beam shape or geometry (G03H1/06 takes precedence)}
- G03H 1/0248: {Volume holograms}
- G03H 1/0406: {Image plane or focused image holograms, i.e. an image of the object or holobject is formed on, in or across the recording plane}
- G02B 5/32: Holograms used as optical elements
- G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)}
- G02B 27/0103: {comprising holographic elements}
- G02B 27/017: {Head mounted}
- G02B 27/0172: {characterised by optical features}
- G02B 27/0961: {Lens arrays (lens arrays per se G02B3/0006)}
- G02B 2027/0105: {Holograms with particular structures}
- G02B 2027/0125: {Field-of-view increase by wavefront division}
- G02B 2027/0174: {holographic}
- G02B 2027/0178: {Eyeglass type (eyeglass details G02C)}
- G03H 1/041: {Optical element in the object space affecting the object beam, not otherwise provided for}
- G03H 2001/0415: {for recording reflection holograms}
- G03H 2001/0439: {for recording Holographic Optical Element [HOE]}
- G03H 2223/19: Microoptic array, e.g. lens array
- G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00})
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

Holographic optical elements for augmented reality (AR) devices and methods of manufacturing and using the same are disclosed. A disclosed system includes a holographic optical element (HOE), and a first light source to direct a first beam of light toward the HOE from a first direction. The first beam of light is collimated. The disclosed system further includes a second light source to direct a second beam of light toward the HOE from a second direction. The disclosed system also includes a decollimation lens positioned between the first light source and the HOE. The decollimation lens is to decollimate the first beam of light.

## Claims

### Claim 1

A system comprising:
a holographic optical element (HOE);
a first light source to direct a first beam of light toward the HOE from a first direction, the first beam of light being collimated;
a second light source to direct a second beam of light toward the HOE from a second direction; and
a decollimation lens positioned between the first light source and the HOE, the decollimation lens to decollimate the first beam of light.

### Claim 2 (depends on 1)

The system as defined in claim 1, wherein a focal length of the decollimation lens defines a focal point for chief rays of sub-images to be reflected off the HOE from a projector.

### Claim 3 (depends on 2)

The system as defined in claim 2, wherein the decollimation lens is a diverging lens, the diverging lens positioned between the focal point for the chief rays and the HOE.

### Claim 4 (depends on 3)

The system as defined in claim 3, wherein the second beam of light is to converge towards a second focal point, the second focal point defining a location for the projector.

### Claim 5 (depends on 2)

The system as defined in claim 2, wherein the decollimation lens is a converging lens, the HOE positioned between the focal point for the chief rays and the converging lens.

### Claim 6 (depends on 5)

The system as defined in claim 5, wherein the second beam of light is to diverge outward from a second focal point, the second focal point defining a location for the projector.

### Claim 7 (depends on 2)

The system as defined in claim 2, further including a lens array positioned between the decollimation lens and the HOE, the lens array to focus separate portions of the first beam of light to separate focal points on a focal plane between the focal point for the chief rays and the HOE.

### Claim 8

A method comprising:
positioning a decollimation lens adjacent to a holographic optical element (HOE);
transmitting a first beam of light through the decollimation lens towards a first side of the HOE; and
transmitting a second beam of light towards a second side of the HOE.

### Claim 9 (depends on 8)

The method as defined in claim 8, defining a focal point for chief rays of sub-images to be reflected off the HOE from a projector based on a focal length of the decollimation lens.

### Claim 10 (depends on 9)

The method as defined in claim 9, further including positioning the decollimation lens between the focal point for the chief rays and the HOE, the decollimation lens being a diverging lens.

### Claim 11 (depends on 10)

The method as defined in claim 10, wherein the second beam of light is to converge towards a second focal point, the method further including defining a location for the projector based on a location of the second focal point.

### Claim 12 (depends on 9)

The method as defined in claim 9, further including positioning the HOE between the focal point for the chief rays and the decollimation lens, the decollimation lens being a converging lens.

### Claim 13 (depends on 12)

The method as defined in claim 12, wherein the second beam of light is to diverge from a second focal point, the method further including defining a location for the projector based on a location of the second focal point.

### Claim 14 (depends on 9)

The method as defined in claim 9, further including positioning a lens array between the decollimation lens and the HOE to focus separate portions of the first beam of light to separate focal points on a focal plane between the focal point for the chief rays and the HOE.

### Claim 15

An apparatus comprising:
means for reflecting;
means for directing a first beam of light toward the reflecting means from a first direction, the first beam of light being collimated;
means for directing a second beam of light toward the reflecting means from a second direction; and
means for decollimating light, the light decollimating means positioned between the first beam of light directing means and the reflecting means, the light decollimating means to decollimate the first beam of light.

### Claim 16 (depends on 15)

The apparatus as defined in claim 15, wherein a focal length of the light decollimating means defines a focal point for chief rays of sub-images to be reflected off the reflecting means from means for projecting.

### Claim 17 (depends on 16)

The apparatus as defined in claim 16, wherein the light decollimating means is a diverging lens, the diverging lens positioned between the focal point for the chief rays and the reflecting means.

### Claim 18 (depends on 17)

The apparatus as defined in claim 17, wherein the second beam of light is to converge towards a second focal point, the second focal point defining a location for the projecting means.

### Claim 19 (depends on 16)

The apparatus as defined in claim 16, wherein the light decollimating means is a converging lens, the reflecting means positioned between the focal point for the chief rays and the converging lens.

### Claim 20 (depends on 19)

The apparatus as defined in claim 19, wherein the second beam of light is to diverge outward from a second focal point, the second focal point defining a location for the projecting means.