公开(公告)号：US12177611B1

公开(公告)日：2024-12-24

申请号：US18218508

申请日：2023-07-05

Applicant: Amazon Technologies, Inc.

Inventor： Haiwei Chen ,  Chulwoo Oh ,  Kibyung Seong ,  Seokchan Hong ,  Suchit Shah ,  Bo Qu

IPC: H04N9/31 ,  G02B27/01 ,  G02B27/28

Abstract: A method includes receiving a light beam propagating along an optical path and operating a polarization rotator in a first state to produce an input right-hand circularly polarized beam or in a second state to produce an input left-hand circularly polarized beam. The method also includes converting, using a first diffractive element, the input right-hand circularly polarized beam into an intermediate left-hand circularly polarized beam or converting, using the first diffractive element, the input left-hand circularly polarized beam into an intermediate right-hand circularly polarized beam. The method also includes converting, using a second diffractive element, the intermediate left-hand circularly polarized beam into a right-hand circularly polarized output beam or converting, using the second diffractive element, the intermediate right-hand circularly polarized beam into a left-hand circularly polarized output beam.

公开(公告)号：US11750780B1

公开(公告)日：2023-09-05

申请号：US17973693

申请日：2022-10-26

Applicant: Amazon Technologies, Inc.

Inventor： Haiwei Chen ,  Chulwoo Oh ,  Kibyung Seong ,  Seokchan Hong ,  Suchit Shah ,  Bo Qu

IPC: H04N9/31 ,  G02B27/01 ,  G02B27/28

CPC classification number: H04N9/3152 ,  G02B27/0172 ,  H04N9/3161 ,  G02B27/28

Abstract: A method includes receiving a light beam propagating along an optical path and operating a polarization rotator in a first state to produce an input right-hand circularly polarized beam or in a second state to produce an input left-hand circularly polarized beam. The method also includes converting, using a first diffractive element, the input right-hand circularly polarized beam into an intermediate left-hand circularly polarized beam or converting, using the first diffractive element, the input left-hand circularly polarized beam into an intermediate right-hand circularly polarized beam. The method also includes converting, using a second diffractive element, the intermediate left-hand circularly polarized beam into a right-hand circularly polarized output beam or converting, using the second diffractive element, the intermediate right-hand circularly polarized beam into a left-hand circularly polarized output beam.

公开(公告)号：US11553163B1

公开(公告)日：2023-01-10

申请号：US17241693

申请日：2021-04-27

Applicant: Amazon Technologies, Inc.

Inventor： Haiwei Chen ,  Chulwoo Oh ,  Kibyung Seong ,  Seokchan Hong ,  Suchit Shah ,  Bo Qu

IPC: H04N9/31 ,  G02B27/01 ,  G02B27/28

Abstract: A method includes receiving a light beam propagating along an optical path, converting, using a first diffractive element, a first portion of the light beam into a first circularly polarized beam, and a second portion of the light beam into a second circularly polarized beam. The method also includes converting, using a second diffractive element, the first circularly polarized beam into a first circularly polarized output beam, and the second circularly polarized beam into a second circularly polarized output beam.

公开(公告)号：US11630325B1

公开(公告)日：2023-04-18

申请号：US17146034

申请日：2021-01-11

Applicant: Amazon Technologies, Inc.

Inventor： Angeles Marcia Almanza-Workman ,  Robert Waverly Zehner ,  Suchit Shah ,  Kibyung Seong ,  Jon H. Appleby

IPC: G02B27/01 ,  G02C7/02 ,  G02B1/11 ,  G02C11/00

Abstract: Systems and methods are disclosed for augmented reality devices with prescription lenses. An example augmented reality device may include a frame and a lens coupled to the frame. The lens may include a prescription lens configured to refract light, the prescription lens having a first index of refraction value, a waveguide encapsulated in the prescription lens, the waveguide having a second index of refraction value, and a first coating layer disposed on a first side of the waveguide, the first coating layer having a third index of refraction value. The third index of refraction value may be less than the first index of refraction value, and the first index of refraction value may be less than the second index of refraction value.

公开(公告)号：US11099469B1

公开(公告)日：2021-08-24

申请号：US16680299

申请日：2019-11-11

Applicant: Amazon Technologies, Inc.

Inventor： Gareth James Selfe ,  Eric Gifford Marason ,  Suchit Shah ,  Robert Domingo Lau ,  John Larkin ,  Mark Steven Pearson

IPC: G03B21/20 ,  G03B21/28 ,  G02B3/08

Abstract: Devices, systems, and methods are provided for an ultra-short throw projector. The projector may include an illuminator having an ellipsoidal reflector, a light emitting diode (LED) positioned inside of the ellipsoidal reflector, and a Fresnel lens positioned inside of the ellipsoidal reflector. The projector may include a circular transmissive liquid crystal display (LCD) and a three-element plastic projection lens positioned outside of the ellipsoidal reflector, wherein the circular transmissive LCD is positioned between the ellipsoidal reflector and the three-element plastic projection lens, wherein the ellipsoidal reflector reflects light emitted by the LED, wherein the Fresnel lens refracts light emitted by the LED, and wherein the three-element plastic projection lens projects the reflected light and the refracted light.