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：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.