# US 12,601,917 B2 · Glasses-type augmented reality apparatus and system with compact dimensions

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- Number: US 12,601,917 B2
- Document ID: US12601917B2
- Status: Granted
- Kind: B2
- Application number: 18/315,898
- Filed: 2023-05-11
- Published: 2024-05-23
- Granted: 2026-04-14
- Earliest claimed: 2022-11-22
- Assignees: Korea Photonics Technology Institute
- Applicants: Korea Photonics Technology Institute
- Inventors: Seon Kyu Yoon; Jin Su Lee; Sung Jin Lim; Ji Yeon Kim
- Web page: https://patentgrep.com/patent/US12601917B2

## CPC

- G02B 27/0172: {characterised by optical features}
- G02B 5/32: Holograms used as optical elements
- G02B 27/01: Head-up displays
- G02B 2027/0174: {holographic}
- G02B 2027/0178: {Eyeglass type (eyeglass details G02C)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

This disclosure relates to a glasses-type augmented reality apparatus, and system with compact dimensions. An aspect of the present embodiment provides an augmented reality apparatus which provides a wearer with a digital holographic image incident from the outside as a holographic image, the apparatus including a plurality of holographic optical elements (HOEs) arranged in the form of concentric circles having different radii inside an optical configuration worn by the wearer to diffract the incident digital holographic image and provide the diffracted digital holographic image to the wearer.

## Claims

### Claim 1

An augmented reality apparatus configured to receive, from an outside of the augmented reality apparatus, a digital holographic image that is viewable only by a wearer and provide the wearer with the digital holographic image incident as a holographic image, the apparatus comprising only:
a plurality of holographic optical elements (HOEs) arranged in a form of concentric circles having different radii inside an optical configuration worn by the wearer to diffract the incident digital holographic image and provide the diffracted digital holographic image to the wearer such that the digital holographic image is recognized as an augmented reality image,
wherein each of the holographic optical elements has an angular diameter that is less than 1/180°.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the concentric circles of the holographic optical elements are arranged spaced apart from each other by a preset first interval.

### Claim 3 (depends on 2)

The apparatus of claim 2, wherein the preset first interval is within a preset error range based on 1/60°.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the holographic optical elements are arranged such that the holographic optical elements arranged in the same concentric circle are arranged spaced apart from each other by a preset second interval.

### Claim 5 (depends on 4)

The apparatus of claim 4, wherein the preset second interval is within a preset error range based on 1/60°.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein each of the holographic optical elements has a preset radius.

### Claim 7

An augmented reality apparatus configured to receive, from an outside of the augmented reality apparatus, a digital holographic image that is viewable only by a wearer and provide the wearer with a digital holographic image incident as a holographic image, the apparatus comprising only:
an optical configuration which the wearer wears; and
a plurality of holographic optical elements (HOEs) arranged in a form of concentric circles having different radii inside the optical configuration to diffract the incident digital holographic image and provide the diffracted digital holographic image to the wearer such that the digital holographic image is recognized as an augmented reality image,
wherein each of the holographic optical elements has an angular diameter that is less than 1/180°.

### Claim 8 (depends on 7)

The apparatus of claim 7, wherein the concentric circles of the holographic optical elements are arranged spaced apart from each other by a preset first interval.

### Claim 9 (depends on 8)

The apparatus of claim 8, wherein the preset first interval is within a preset error range based on 1/60°.

### Claim 10 (depends on 7)

The apparatus of claim 7, wherein the holographic optical elements are arranged such that the holographic optical elements arranged in the same concentric circle are arranged spaced apart from each other by a preset second interval.

### Claim 11 (depends on 10)

The apparatus of claim 10, wherein the preset second interval is within a preset error range based on 1/60°.

### Claim 12

An augmented reality system which enables a wearer to watch a holographic image, the system comprising:
a projector which outputs a digital holographic image (computer generated holography (CGH)) that is viewable only by the wearer wearing an augmented reality apparatus to an arbitrary space; and
the augmented reality apparatus including only a plurality of holographic optical elements (HOEs) arranged in a form of concentric circles having different radii inside an optical configuration worn by the wearer to diffract an incident digital holographic image and provide the diffracted digital holographic image to the wearer such that the digital holographic image is recognized as an augmented reality image,
wherein each of the holographic optical elements has an angular diameter that is less than 1/180°.