Patents
US 12730318 B2: Exit pupil expander with total internal reflection between wedge surfaces
- Granted
- 2026-09-08
- Filed
- 2024-02-05 application 18432547
- Type
- Utility · 15 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An exit pupil expander (EPE) has entrance and exit pupils, a back surface adjacent to the entrance pupil, and an opposed front surface. In one embodiment the EPE is geometrically configured such that light defining a center wavelength that enters at the entrance pupil perpendicular to the back surface experiences angularly varying total internal reflection between the front and back surfaces such that the light exiting the optical channel perpendicular to the exit pupil is at a wavelength shifted from the center wavelength. In another embodiment a first distance at the entrance pupil between the front and back surfaces is different from a second distance at the exit pupil between the front and back surfaces. The EPE may be deployed in a head-wearable imaging device (e.g., virtual or augmented reality) where the entrance pupil in-couples light from a micro display and the exit pupil out-couples light from the EPE.
Source: PTBLXML, file of 2026-09-08 (ipgb20260908.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Magic Leap, Inc. 2,122 patents | US company or organization | Plantation, FL | MAGIC LEAP, INC. Federal lobbying client EXACT high confidence: identical full name and state | PTBLXML, file of 2026-09-08 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Jyrki Sakari Kimmel | Tampere, FI | PTBLXML, file of 2026-09-08 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G02B | Optical elements, systems or apparatus | G02B27/0172 | PTBLXML, file of 2026-09-08 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2026-07-31 | Security interest Security interest Security interest | MAGIC LEAP, INC. signed 2026-07-07 MENTOR ACQUISITION ONE, LLC signed 2026-07-07 MOLECULAR IMPRINTS, INC. signed 2026-07-07 | CITIBANK, N.A., AS COLLATERAL AGENT NEW YORK, NY | 76088/541 | PASDL, file of 2026-10-18 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.