DYNAMIC APERTURE HOLOGRAPHY
First Claim
1. A method of using dynamic aperture holography for recording multiple holograms, the method comprising:
- projecting a first signal beam through an objective lens into a photosensitive recording medium at a first signal beam angular aperture;
projecting a first reference beam through the objective lens into the photosensitive recording medium at a first reference beam angular aperture, wherein the first reference beam and the first signal beam interfere with each other to form a first interference pattern, the first interference pattern being recorded as a first hologram in the photosensitive recording medium;
projecting a second signal beam through the objective lens into the photosensitive recording medium at a second signal beam angular aperture, wherein the second signal beam angular aperture differs from the first signal beam angular aperture in at least one of size, shape, and position; and
projecting a second reference beam through the objective lens into the photosensitive recording medium at a second reference beam angular aperture, wherein the second reference beam and the second signal beam interfere with each other to form a second interference pattern, the second interference pattern being recorded as a second hologram in the photosensitive recording medium.
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Abstract
Methods and systems for performing dynamic aperture holography are described. Embodiments include a method of recording multiple holograms in a photosensitive recording medium, wherein multiple signal beam angular apertures used to record the multiple holograms differ from each other. The multiple signal beam angular apertures can facilitate using a larger range of reference beam angular apertures. The multiple holograms are typically multiplexed, and embodiments of dynamic aperture holography enable packing the multiplexed holograms more densely in the recording medium. Embodiments include dynamic aperture holography systems having monocular objective lens architecture.
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Citations
26 Claims
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1. A method of using dynamic aperture holography for recording multiple holograms, the method comprising:
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projecting a first signal beam through an objective lens into a photosensitive recording medium at a first signal beam angular aperture; projecting a first reference beam through the objective lens into the photosensitive recording medium at a first reference beam angular aperture, wherein the first reference beam and the first signal beam interfere with each other to form a first interference pattern, the first interference pattern being recorded as a first hologram in the photosensitive recording medium; projecting a second signal beam through the objective lens into the photosensitive recording medium at a second signal beam angular aperture, wherein the second signal beam angular aperture differs from the first signal beam angular aperture in at least one of size, shape, and position; and projecting a second reference beam through the objective lens into the photosensitive recording medium at a second reference beam angular aperture, wherein the second reference beam and the second signal beam interfere with each other to form a second interference pattern, the second interference pattern being recorded as a second hologram in the photosensitive recording medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of using dynamic aperture holography for recording multiple holograms, the method comprising:
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projecting a first signal beam into a photosensitive recording medium at a first signal beam angular aperture; projecting a first reference beam into the photosensitive recording medium at a first reference beam angular aperture, wherein; the first reference beam and the first signal beam interfere with each other to form a first interference pattern, the first interference pattern being recorded as a first hologram in the photosensitive recording medium; and the first signal beam angular aperture is separated from the first reference beam angular aperture by a first separation angle; projecting a second signal beam into the photosensitive recording medium at a second signal beam angular aperture, wherein the second signal beam angular aperture differs from the first signal beam angular aperture; projecting a second reference beam into the photosensitive recording medium at a second reference beam angular aperture, wherein; the second reference beam and the second signal beam interfere with each other to form a second interference pattern, the second interference pattern being recorded as a second hologram in the photosensitive recording medium; and the second signal beam angular aperture is separated from the second reference beam angular aperture by a second separation angle; projecting a third signal beam into the photosensitive recording medium at a third signal beam angular aperture that differs from the first and second signal beam angular apertures; projecting a third reference beam into the photosensitive recording medium at a third reference beam angular aperture, wherein; the third reference beam and the third signal beam interfere with each other to form a third interference pattern, the third interference pattern being recorded as a third hologram in the photosensitive recording medium; and the third signal beam angular aperture is separated from the third reference beam angular aperture by a third separation angle; projecting a fourth signal beam into the photosensitive recording medium at a fourth signal beam angular aperture that differs from the first, second, and third signal beam angular apertures; projecting a fourth reference beam into the photosensitive recording medium at a fourth reference beam angular aperture, wherein; the fourth reference beam and the fourth signal beam interfere with each other to form a fourth interference pattern, the fourth interference pattern being recorded as a fourth hologram in the photosensitive recording medium; the fourth signal beam angular aperture is separated from the fourth reference beam angular aperture by a fourth separation angle; and each of the first, second, third, and fourth separation angles are equal to or greater than a predetermined minimum separation angle. - View Dependent Claims (24, 25)
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26. A method of using dynamic aperture holography for recording multiple holograms, the method comprising:
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projecting a first signal beam through an objective lens into a photosensitive recording medium at a first signal beam angular aperture; projecting a first reference beam through the objective lens into the photosensitive recording medium at a first reference beam angular aperture, wherein; the first reference beam and the first signal beam interfere with each other to form a first interference pattern; the first interference pattern is recorded as a first hologram in the photosensitive recording medium; and the first signal beam angular aperture is separated from the first reference beam angular aperture by first separation angle; projecting a second signal beam through the objective lens into the photosensitive recording medium at a second signal beam angular aperture, wherein the second signal beam angular aperture differs from the first signal beam angular aperture; and projecting a second reference beam through the objective lens into the photosensitive recording medium at a second reference beam angular aperture that differs from the first reference beam angular aperture, wherein; the second reference beam and the second signal beam interfere with each other to form a second interference pattern; the second interference pattern is recorded as a second hologram in the photosensitive recording medium; and the second signal beam is separated from the second reference beam by a second separation angle; projecting a third signal beam through the objective lens into the photosensitive recording medium at a third signal beam angular aperture that differs from the first and second signal beam angular apertures; projecting a third reference beam through the objective lens into the photosensitive recording medium at a third reference beam angular aperture, wherein; the third reference beam and the third signal beam interfere with each other to form a third interference pattern; the third interference pattern is recorded as a third hologram in the photosensitive recording medium; and the third signal beam is separated from the third reference beam by a third separation angle; projecting a fourth signal beam through the objective lens into the photosensitive recording medium at a fourth signal beam angular aperture that differs from the first, second, and third signal beam angular apertures; and projecting a fourth reference beam through the objective lens into the photosensitive recording medium at a fourth reference beam angular aperture that differs from the first, second, and third reference beam angular apertures, wherein; the fourth reference beam and the fourth signal beam interfere with each other to form a fourth interference pattern; the fourth interference pattern is recorded as a fourth hologram in the photosensitive recording medium; the fourth signal beam is separated from the fourth reference beam by a fourth separation angle; each of the first, second, third, and fourth separation angles is greater than a predetermined minimum separation angle; each of the first, second, third, and fourth holograms at least partially overlaps all others of the first, second, third, and fourth holograms in the photosensitive recording medium; the first signal beam angular aperture is separated from a specified reference beam angular aperture by less than the predetermined minimum separation angle; and the specified reference beam angular aperture is selected from the group consisting of the second, third, and fourth reference beam angular apertures.
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Specification