公开(公告)号：US12038721B2

公开(公告)日：2024-07-16

申请号：US17387369

申请日：2021-07-28

Applicant: GOOGLE LLC

Inventor： Robin W. Tsen

IPC: G03H1/02 ,  G02B27/01 ,  G03H1/26

CPC classification number: G03H1/26 ,  G02B27/0172 ,  G03H1/02 ,  G03H1/0236 ,  G03H1/2645 ,  G02B2027/0174 ,  G02B2027/0178 ,  G03H2001/0212 ,  G03H2001/026 ,  G03H2001/266 ,  G03H2222/13

Abstract: Systems, devices, and methods for side lobe control in holograms are described. The magnitude of the side lobes of a hologram depends on the distribution of refractive index modulation (Δn), therefore control of side lobe magnitude may be achieved by controlling the distribution of Δn. The distribution of Δn may be controlled by replicating a hologram from a master with two reference beams, where the wavelength and angle of each reference beam, the playback angle of the master hologram, and the thickness of the master hologram, the copy holographic recording medium (HRM), and the recording substrate are carefully chosen to achieve a pattern of meta-interference within the HRM that matches the desired distribution of Δn.

公开(公告)号：US20220299866A1

公开(公告)日：2022-09-22

申请号：US17638911

申请日：2020-09-10

Applicant: GOOGLE LLC

Inventor： Robin W. Tsen ,  Yuandong Ma

IPC: G03F7/00 ,  G03F7/095 ,  G03H1/18

Abstract: A method of recording multiple holograms into a holographic recording medium includes exposing the medium to a first light to cause changes in a first refractive index of at least a portion of a first layer of the medium to write a first hologram in the first layer without changing a second refractive index of a second layer of the recording medium. The method also includes exposing the medium to a second light to cause changes in a second refractive index of at least a portion of the second layer to write a second hologram in the second layer. The first layer may include a first photo-polymerizable composition polymerizable by the first light, and the second layer may include a second photo-polymerizable composition polymerizable by the second light and not polymerizable by the first light.

公开(公告)号：US10955670B2

公开(公告)日：2021-03-23

申请号：US16038444

申请日：2018-07-18

Applicant: GOOGLE LLC

Inventor： Nils Johan Fransson ,  Eric J. Caliston ,  Arnett Weber ,  Michael A. T. Fowler ,  Robin W. Tsen ,  Darren Ihmels

IPC: G02B27/01 ,  G02C7/02 ,  G02B1/14 ,  G02B27/42 ,  G06F1/16 ,  G06F3/01 ,  G06F3/0487 ,  G02B1/04

Abstract: Systems, devices, and methods for embedding a diffractive element in an eyeglass lens are described. A method of embedding a diffractive element in an eyeglass lens includes applying a protective layer to a diffractive element, applying an interface layer to the protective layer, and applying a lens layer to the interface layer. The interface layer and the lens layer are each comprised of a resin material that hardens when cured. The interface layer is of a shape and thickness that adheres well to the protective layer after the interface layer is cured. The lens layer is of a shape and thickness that achieves the desired component shape of the lens after the lens layer is cured.

公开(公告)号：US11188027B2

公开(公告)日：2021-11-30

申请号：US16276051

申请日：2019-02-14

Applicant: GOOGLE LLC

Inventor： Robin W. Tsen

IPC: G03H1/26 ,  G02B27/01 ,  G03H1/02

Abstract: Systems, devices, and methods for side lobe control in holograms are described. The magnitude of the side lobes of a hologram depends on the distribution of refractive index modulation (Δn), therefore control of side lobe magnitude may be achieved by controlling the distribution of Δn. The distribution of Δn may be controlled by replicating a hologram from a master with two reference beams, where the wavelength and angle of each reference beam, the playback angle of the master hologram, and the thickness of the master hologram, the copy holographic recording medium (HRM), and the recording substrate are carefully chosen to achieve a pattern of meta-interference within the HRM that matches the desired distribution of Δn.

公开(公告)号：US20210356909A1

公开(公告)日：2021-11-18

申请号：US17387369

申请日：2021-07-28

Applicant: GOOGLE LLC

Inventor： Robin W. Tsen

IPC: G03H1/26 ,  G02B27/01 ,  G03H1/02

Abstract: Systems, devices, and methods for side lobe control in holograms are described. The magnitude of the side lobes of a hologram depends on the distribution of refractive index modulation (Δn), therefore control of side lobe magnitude may be achieved by controlling the distribution of Δn. The distribution of Δn may be controlled by replicating a hologram from a master with two reference beams, where the wavelength and angle of each reference beam, the playback angle of the master hologram, and the thickness of the master hologram, the copy holographic recording medium (HRM), and the recording substrate are carefully chosen to achieve a pattern of meta-interference within the HRM that matches the desired distribution of Δn.

公开(公告)号：US10955669B2

公开(公告)日：2021-03-23

申请号：US16038437

申请日：2018-07-18

Applicant: GOOGLE LLC

Inventor： Nils Johan Fransson ,  Eric J. Caliston ,  Arnett Weber ,  Michael A. T. Fowler ,  Robin W. Tsen ,  Darren Ihmels

IPC: G02B27/01 ,  G02C7/02 ,  G02B1/14 ,  G02B27/42 ,  G06F1/16 ,  G06F3/01 ,  G06F3/0487 ,  G02B1/04

Abstract: Systems, devices, and methods for embedding a diffractive element in an eyeglass lens are described. A method of embedding a diffractive element in an eyeglass lens includes applying a protective layer to a diffractive element, applying an interface layer to the protective layer, and applying a lens layer to the interface layer. The interface layer and the lens layer are each comprised of a resin material that hardens when cured. The interface layer is of a shape and thickness that adheres well to the protective layer after the interface layer is cured. The lens layer is of a shape and thickness that achieves the desired component shape of the lens after the lens layer is cured.