# US 12,118,143 B1 · Pancake lenses with integrated accommodation

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- Number: US 12,118,143 B1
- Document ID: US12118143B1
- Status: Granted
- Kind: B1
- Application number: 18/193,663
- Filed: 2023-03-31
- Granted: 2024-10-15
- Earliest claimed: 2022-10-12
- Assignees: Meta Platforms Technologies, LLC
- Applicants: Meta Platforms Technologies, LLC
- Inventors: Robin Sharma; Afsoon Jamali; Brent Bollman
- Web page: https://patentgrep.com/patent/US12118143B1

## CPC

- G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)}
- G06T 2207/10: Image acquisition modality
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

An apparatus for a pancake lens with integration accommodation may include a beamsplitter, a first lens, a reflective polarizer, and a second lens, where the second lens includes at least one planar module embedded within the second lens. Other apparatuses, systems, and methods are also disclosed.

## Claims

### Claim 1

An apparatus comprising:
a beamsplitter;
a first lens;
a reflective polarizer; and
a second lens, wherein the second lens comprises at least one planar module embedded within the second lens that comprises an eye tracking module.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the planar module corresponds to a compound module that comprises an accommodation module and the eye tracking module.

### Claim 3 (depends on 2)

The apparatus of claim 2, wherein the accommodation module comprises at least one of:
a gradient-index liquid crystal lens; or
a Pancharatnam-Berry phase lens.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the eye tracking module comprises at least one illumination element.

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein the eye tracking module comprises at least one camera.

### Claim 6 (depends on 5)

The apparatus of claim 5, wherein the eye tracking module comprises an optical element that is at least partially reflective and that reflects at least a portion of light entering the second lens to the at least one camera.

### Claim 7 (depends on 1)

The apparatus of claim 1, wherein the planar module runs along a transverse axis of the second lens.

### Claim 8 (depends on 1)

The apparatus of claim 1, wherein the planar module is connected to at least one driving circuit that controls an operation of the planar module.

### Claim 9 (depends on 1)

The apparatus of claim 1, wherein the planar module comprises a chromatic aberration corrector.

### Claim 10 (depends on 1)

The apparatus of claim 1, wherein the eye tracking module includes at least one of a waveguide, a photodiode, or a photonic integrated circuit.

### Claim 11

A system comprising:
a head-mounted display comprising:
a beamsplitter;
a first lens;
a reflective polarizer; and
a second lens, wherein the second lens comprises at least one planar module embedded within the second lens that comprises an eye tracking module.

### Claim 12 (depends on 11)

The system of claim 11, wherein the planar module corresponds to a compound module that comprises an accommodation module and the eye tracking module.

### Claim 13 (depends on 12)

The system of claim 12, wherein the accommodation module comprises at least one of:
a gradient-index liquid crystal lens; or
a Pancharatnam-Berry phase lens.

### Claim 14 (depends on 11)

The system of claim 11, wherein the eye tracking module comprises at least one illumination element.

### Claim 15 (depends on 11)

The system of claim 11, wherein the eye tracking module comprises at least one camera.

### Claim 16 (depends on 15)

The system of claim 15, wherein the eye tracking module comprises an optical element that is at least partially reflective and that reflects at least a portion of light entering the second lens to the at least one camera.

### Claim 17 (depends on 11)

The system of claim 11, wherein the planar module runs along a transverse axis of the second lens.

### Claim 18 (depends on 11)

The system of claim 11, wherein the planar module is connected to at least one driving circuit that controls an operation of the planar module.

### Claim 19 (depends on 11)

The system of claim 11, wherein the eye tracking module includes at least one of a waveguide, a photodiode, or a photonic integrated circuit.

### Claim 20

A method of manufacture, comprising:
coupling a beamsplitter to a first lens;
coupling a reflective polarizer to the first lens;
coupling a first part of a second lens with a first surface of planar module, wherein the planar module comprises an eye tracking module;
coupling a second part of the second lens with a second surface of the planar module; and
aligning an optical axis of the first lens with an optical axis of the second lens.