Granted Patent B2

US 12,366,823 · App. 18/353,777 · Granted Jul 22, 2025

Inventors: Jonathan David Waldern (Diablo, CA); Alastair John Grant (San Jose, CA); Milan Momcilo Popovich (Leicester, GB); Ratson Morad (Palo Alto, CA); Sean Michael Williams (Los Gatos, CA)

Assignee: DigiLens Inc.

G03H1/0408G02B6/4204G03H1/0248G03H1/0465G03H2001/0434G03H2001/0439G03H1/30G03H2222/34G03H2223/16G03H2223/24G03H2223/50

Abstract

Claims (68)

1. A holographic recording system comprising;

at least one laser source configured to emit recording beams;

a first set of one or more stations comprising one or more stage assemblies configured to move within the first set of one or more stations, wherein the one or more stage assemblies are configured to house a first set of waveguide cells, wherein the first set of one or more stations comprises a first station and a second station;

a second set of one or more stations comprising one or more stage assemblies configured to move within the second set of one or more stations, wherein the one or more stage assemblies are configured to house a second set of waveguide cells; and

a movable platform configured to move between a first position and a second position, wherein:

when the movable platform is in the first position, the at least one laser source is configured to emit a first set of one or more recording beams toward the first set of one or more stations, wherein the one or more stage assemblies is configured to reposition the first set of waveguide cells to intersect an optical path of the first set of one or more recording beams, wherein the first set of one or more recording beams comprises a first recording beam and a second recording beam, and wherein the at least one laser source is configured to emit the first recording beam toward the first station and the second recording beam toward the second station; and

when the movable platform is in the second position, the at least one laser source is configured to emit a second set of one or more recording beams toward the second set of one or more stations, wherein the one or more stage assemblies is configured to reposition the second set of waveguide cells to intersect the optical path of the second set of one or more recording beams.

2. The holographic recording system of claim 1 , further comprising a plurality of mirrors, wherein when the movable platform is in the first position, the at least one laser source is configured to emit the first set of one or more recording beams toward the first set of one or more stations by using the plurality of mirrors to direct the first set of one or more recording beams.

3. The holographic recording system of claim 1 , wherein the first set of one or more recording beams comprises a first recording beam and a second recording beam.

4. The holographic recording system of claim 1 , wherein:

the at least one laser source comprises a first laser source and a second laser source; and

when the movable platform is in the first position, the first laser source is configured to emit the first recording beam toward the first set of one or more stations and the second laser source is configured to emit the second recording beam toward the first set of one or more stations.

5. The holographic recording system of claim 1 , further comprising a beamsplitter, wherein the at least one laser source is configured to emit the first and second recording beams by emitting an initial beam toward the beamsplitter.

6. The holographic recording system of claim 1 , further comprising a beamsplitter mounted on the movable platform, wherein when the movable platform is in the first position, the at least one laser source is configured to emit the first and second recording beams by emitting an initial beam toward the beamsplitter.

7. The holographic recording system of claim 1 ,

wherein the one or more stage assemblies are configured to move within the one or more stations,

wherein a pair of beamsplitters is mounted on the movable platform and a stationary beamsplitter is mounted off the movable platform;

wherein the first set of one or more recording beams comprises first, second, third, and fourth recording beams, and wherein, the at least one laser source is configured to emit the first and second recording beams toward the first station and to emit the third and fourth recording beams toward the second station, wherein the first, second, third, and fourth recording beams are formed using the pair of beamsplitters and the stationary beamsplitter.

8. The holographic recording system of claim 1 , wherein each of the stations within the first and second sets of stations comprises an optical filter for filtering out ambient light.

9. The holographic recording system of claim 1 ,

wherein the first set of one or more stations and the second set of one or more stations comprise first, second, third, and fourth stations, wherein each station comprises an exposure stack and a waveguide cell stage, wherein the waveguide cell stage is configured to:

house a waveguide cell;

position the waveguide cell such that a surface of the waveguide cell is parallel to a surface of the exposure stack; and

position of the waveguide cell such that the waveguide cell is in an optical path traversing the pair of beamsplitters;

a pair of stationary beamsplitters; and

three beamsplitters mounted on the movable platform, wherein:

when the movable platform is in the first position, the laser source is configured to:

emit a first set of six recording sub-beams simultaneously by:

emitting a first initial recording beam toward the pair of stationary beamsplitters to form a first set of three recording beams; and

directing the first set of three recording beams toward the three mounted beamsplitters to form the first set of six recording sub-beams;

direct three recording sub-beams within the first set of the six recording sub-beams toward the first station; and

direct the other three recording sub-beams within the first set of six recording sub-beams toward the second station; and

when the movable platform is in the second position, the laser source is configured to:

emit a second set of six recording sub-beams simultaneously by:

emitting a second initial recording beam toward the pair of stationary beamsplitters to form a second set of three recording beams; and

directing the second set of three recording beams toward the three mounted beamsplitters to form the second set of six recording sub-beams;

direct three recording sub-beams within the second set of the six recording sub-beams toward the third station; and

direct the other three recording sub-beams within the second set of six recording sub-beams toward the fourth station.

10. A method for recording volume gratings, the method comprising:

emitting a first set of one or more recording beams using at least one laser source, wherein the first set of one or more recording beams comprises a first recording beam and a second recording beam;

directing the emitted first set of one or more recording beams toward a first set of one or more waveguide cells housed in a first set of one or more stage assemblies housed in a first set of one or more stations, wherein the first set of stage assemblies repositions the first set of one or more waveguide cells into an optical path of the emitted first set of one or more recording beams, using at least one optical component mounted on a movable platform, wherein the first set of one or more waveguide cells comprises a first waveguide cell and a second waveguide cell, and the emitted first recording beam is directed toward the first waveguide cell and the emitted second recording beam is directed toward the second waveguide cell;

recording a first set of one or more volume gratings in the first set of one or more waveguide cells;

repositioning the movable platform;

emitting a second set of one or more recording beams using the at least one laser source;

directing the emitted second set of one or more recording beams toward a second set of one or more waveguide cells housed in a second set of one or more stage assemblies housed in a second set of one or more stations, wherein the second set of stage assemblies repositions the second set of one or more waveguide cells into an optical path of the emitted second set of one or more recording beams, using at least one optical component mounted on the movable platform; and

recording a second set of one or more volume gratings in the second set of one or more waveguide cells.

11. The method of claim 10 , wherein:

the at least one laser source comprises a first laser source and a second laser source; and

the first recording beam is emitted by the first laser source and the second recording beam is emitted by the second laser source.

12. The method of claim 10 , wherein the first and second recording beams are formed by emitting an initial beam toward a beamsplitter.

13. The method of claim 10 , wherein the first set of one or more volume gratings is recorded using a single beam interference process.

14. A method for recording volume gratings, the method comprising:

emitting a first set of one or more recording beams using at least one laser source;

directing the emitted first set of one or more recording beams toward a first set of one or more waveguide cells housed in a first set of one or more stations using at least one optical component mounted on a movable platform, wherein the first set of one or more stations comprises a first set of one or more stage assemblies, wherein the first set of one or more stage assemblies is configured to reposition the first set of one or more waveguide cells within the first set of one or more stations;

recording a first set of one or more volume gratings in the first set of one or more waveguide cells;

repositioning the movable platform;

emitting a second set of one or more recording beams using the at least one laser source;

directing the emitted second set of one or more recording beams toward a second set of one or more waveguide cells housed in a second set of one or more stations using the at least one optical component mounted on the movable platform, wherein the second set of one or more stations comprises a second set of one or more stage assemblies, wherein the second set of one or more stage assemblies is configured to reposition the second set of one or more waveguide cells within the second set of one or more stations; and

recording a second set of one or more volume gratings in the second set of one or more waveguide cells, wherein

the at least one optical component comprises a first mounted beamsplitter and a second mounted beamsplitter;

the first set of one or more waveguide cells comprises a first waveguide cell and a second waveguide cell;

the first set of one or more recording beams is emitted using at least one laser source by:

emitting an initial recording beam toward a stationary beamsplitter mounted off the movable platform to form a first recording beam and a second recording beam;

directing the first recording beam toward the first mounted beamsplitter to form a first recording sub-beam and a second recording sub-beam; and

directing the second recording beam toward the second mounted beamsplitter to form a third recording sub-beam and a fourth recording sub-beam; and

the emitted first set of one or more recording beams is directed toward a first set of one or more waveguide cells by:

directing the first and third recording sub-beams toward the first waveguide cell; and

directing the second and fourth recording sub-beams toward the second waveguide cell.

Assignments (1)

Continuity (8)

References Cited (400)

Cited By (2)

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