Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020197660 - ALIGNING A POLARIZATION DEVICE USING A SPATIALLY VARIANT POLARIZATION ELEMENT

Publication Number WO/2020/197660
Publication Date 01.10.2020
International Application No. PCT/US2020/018519
International Filing Date 17.02.2020
IPC
G02B 7/00 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
7Mountings, adjusting means, or light-tight connections, for optical elements
G02B 27/28 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/-G02B26/119
28for polarising
G02B 27/62 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/-G02B26/119
62Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
G02B 27/01 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/-G02B26/119
01Head-up displays
CPC
G01J 4/04
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
4Measuring polarisation of light
04Polarimeters using electric detection means
G02B 2027/012
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
01Head-up displays
0101characterised by optical features
0118comprising devices for improving the contrast of the display / brillance control visibility
012comprising devices for attenuating parasitic image effects
G02B 27/017
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
01Head-up displays
017Head mounted
G02B 27/281
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
28for polarising
281used for attenuating light intensity, e.g. comprising rotatable polarising elements
G02B 27/62
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
62Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
G02B 5/3025
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
30Polarising elements
3025Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
Applicants
  • FACEBOOK TECHNOLOGIES, LLC [US]/[US]
Inventors
  • RICHARDS, Evan, Mark
  • LEVIN, Kieran, Tobias
Agents
  • MOON, William, A.
  • THOMAS, Daniel, A.
Priority Data
16/368,11128.03.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ALIGNING A POLARIZATION DEVICE USING A SPATIALLY VARIANT POLARIZATION ELEMENT
(FR) ALIGNEMENT D'UN DISPOSITIF DE POLARISATION À L'AIDE D'UN ÉLÉMENT DE POLARISATION VARIANT DANS L'ESPACE
Abstract
(EN)
An alignment apparatus for a polarization device includes a polarizer subassembly for polarizing a light beam, a rotary support for rotatably supporting the polarization device in a path of the light beam downstream of the polarizer subassembly, an analyzer subassembly downstream of the rotary support for receiving the light beam propagated through the polarization device, and a photodetector array disposed downstream of the analyzer subassembly and extending along the width dimension of the light beam for detecting the light beam propagated through the analyzer subassembly. At least one of the polarizer or analyzer subassemblies includes a spatially variant polarization element having a polarization property varying along the width dimension of the light beam.
(FR)
Appareil d'alignement n pour un dispositif de polarisation comprenant un sous-ensemble polariseur pour polariser un faisceau lumineux, un support rotatif pour supporter en rotation le dispositif de polarisation dans un trajet du faisceau lumineux en aval du sous-ensemble polariseur, un sous-ensemble analyseur en aval du support rotatif pour recevoir le faisceau lumineux propagé à travers le dispositif de polarisation et un réseau de photodétecteurs disposé en aval du sous-ensemble analyseur et s'étendant le long de la dimension de largeur du faisceau lumineux pour détecter le faisceau lumineux propagé à travers le sous-ensemble analyseur. Au moins l'un des sous-ensembles polariseur ou analyseur comprend un élément de polarisation variant dans l'espace ayant une propriété de polarisation variant le long de la dimension de largeur du faisceau de lumière.
Also published as
Latest bibliographic data on file with the International Bureau