SYSTEMS, DEVICES, AND METHODS FOR CURVED HOLOGRAPHIC OPTICAL ELEMENTS
First Claim
1. A method of producing a curved holographic optical element (“
- HOE”
) that comprises at least one hologram recorded in a holographic film, wherein the curved HOE has a total optical power PT, the method comprising;
positioning and orienting the holographic film in a planar geometry;
optically recording a hologram in the holographic film while the holographic film is in the planar geometry, wherein the hologram has a holographic optical power PH that is less than the total optical power PT of the curved HOE; and
applying a curvature to the holographic film, wherein applying the curvature to the holographic film includes applying a geometric optical power PG to the holographic film, the geometric optical power PG less than the total optical power PT of the curved HOE, and wherein the total optical power PT of the curved HOE includes an additive combination of the holographic optical power PH and the geometric optical power PG given, at least approximately, by PT=PH+PG.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems, devices, and methods for making, replicating, and using curved holographic optical elements (“HOEs”) are described. A hologram may be optically recorded into a planar layer of holographic film with various measures in place to compensate for changes (e.g., in optical power and/or playback wavelength and/or angular bandwidth) that may result when a curvature is subsequently applied thereto. A hologram may be optically recorded into a curved layer of holographic film with various measures in place to compensate for optical effects of a curved transparent substrate upon which the holographic film is mounted. A curved HOE may be returned to a planar configuration to undergo holographic replication or holographic replication may be performed using a curved master HOE and curved “recipient” film. The curved HOEs described herein are particularly well-suited for use when integrated with a curved eyeglass lens to form the transparent combiner of a virtual retina display.
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Citations
25 Claims
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1. A method of producing a curved holographic optical element (“
- HOE”
) that comprises at least one hologram recorded in a holographic film, wherein the curved HOE has a total optical power PT, the method comprising;positioning and orienting the holographic film in a planar geometry; optically recording a hologram in the holographic film while the holographic film is in the planar geometry, wherein the hologram has a holographic optical power PH that is less than the total optical power PT of the curved HOE; and applying a curvature to the holographic film, wherein applying the curvature to the holographic film includes applying a geometric optical power PG to the holographic film, the geometric optical power PG less than the total optical power PT of the curved HOE, and wherein the total optical power PT of the curved HOE includes an additive combination of the holographic optical power PH and the geometric optical power PG given, at least approximately, by PT=PH+PG. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- HOE”
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9. A curved holographic optical element (“
- HOE”
) having a total optical power PT, comprising;at least one curved layer of holographic film that includes at least one hologram, wherein; the at least one hologram has a holographic optical power PH that is less than the total optical power PT of the curved HOE; and the at least one curved layer of holographic film has a geometric optical power PG that is less than the total optical power PT of the curved HOE, and wherein the total optical power PT of the curved HOE includes an additive combination of the holographic optical power PH of the at least one hologram and the geometric optical power PG of the at least one curved layer of holographic film given, at least approximately, by PT=PH+PG. - View Dependent Claims (10)
- HOE”
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11. A method of producing a curved holographic optical element (“
- HOE”
) that comprises at least one hologram recorded in a holographic film, the method comprising;positioning and orienting the holographic film in a planar geometry; optically recording a hologram in the holographic film with a first laser having a first wavelength while the holographic film is in the planar geometry, the first wavelength different from a playback wavelength of the curved HOE; and applying a curvature to the holographic film. - View Dependent Claims (12, 13, 14, 15, 16)
- HOE”
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17. A method of producing a holographic optical element (“
- HOE”
) that comprises at least one hologram recorded in a holographic film, the method comprising;providing a first layer of holographic film in a planar geometry; stretching the first layer of holographic film; optically recording a hologram in the first layer of holographic film while the first layer of holographic film is stretched; and returning the first layer of holographic film to an unstretched state. - View Dependent Claims (18, 19, 20, 21, 22)
- HOE”
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23. A method of producing a curved holographic optical element (“
- HOE”
), the method comprising;mounting a holographic film on a first surface, the first surface being transparent and having a first curvature; and optically recording a hologram in the holographic film while the holographic film is mounted on the first surface. - View Dependent Claims (24)
- HOE”
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25. A method of replicating a curved holographic optical element (“
- HOE”
) that comprises at least one hologram recorded in a holographic film, the method comprising;providing a first layer of holographic film; mounting the first layer of holographic film on a first surface, the first surface having a first curvature; optically recording a hologram in the first layer of holographic film while the first layer of holographic film is mounted on the first surface; providing a second layer of holographic film; applying the first curvature to the second layer of holographic film; and replicating the hologram from the first layer of holographic film in the second layer of holographic film while both the first layer of holographic film and the second layer of holographic film each have the first curvature.
- HOE”
Specification