System and methods for shearless hologram acquisition
First Claim
1. An apparatus to shearlessly record a hologram comprising:
- an illumination source configured to produce a first beam of light;
a beamsplitter configured to split the first beam into a reference beam and an object illumination beam;
a phase-shaping optical element configured to impart a phase shift to the reference beam and to return the phase-shifted reference beam to the beamsplitter substantially coaxially with the non-phase-shifted reference beam;
wherein the beamsplitter is configured to receive the phase-shifted reference beam and a portion of the object illumination beam which is reflected from an object and to substantially coaxially combine the phase-shifted reference beam and the reflected portion of the object illumination beam;
a focusing lens configured to receive the combined phase-shifted reference beam and reflected object illumination beam and to focus the combined phase-shifted reference beam and reflected object illumination beam at a focal plane; and
a digital recorder positioned at the focal plane and configured to record a spatially heterodyne hologram formed by the focused phase-shifted reference beam and reflected object illumination beam.
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Accused Products
Abstract
Systems and methods for shearless digital hologram acquisition, including an apparatus incorporating an illumination source configured to produce a first beam of light, which is then split by a beamsplitter into a reference beam and an object illumination beam. The reference beam is directed onto a phase-shaping optical element which imparts a phase shift to the reference beam and returns the phase-shifted reference beam on itself to the beamsplitter. The object illumination beam is directed onto an object, and a portion of the beam is reflected back to the beamsplitter, which combines the phase-shifted reference beam and object illumination beam substantially coaxially. The combined beams are passed through a focusing lens which focuses them at a focal plane. A digital recorder is positioned at the focal plane to record the spatially heterodyne hologram formed by the focused phase-shifted reference beam and reflected object illumination beam.
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Citations
20 Claims
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1. An apparatus to shearlessly record a hologram comprising:
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an illumination source configured to produce a first beam of light; a beamsplitter configured to split the first beam into a reference beam and an object illumination beam; a phase-shaping optical element configured to impart a phase shift to the reference beam and to return the phase-shifted reference beam to the beamsplitter substantially coaxially with the non-phase-shifted reference beam; wherein the beamsplitter is configured to receive the phase-shifted reference beam and a portion of the object illumination beam which is reflected from an object and to substantially coaxially combine the phase-shifted reference beam and the reflected portion of the object illumination beam; a focusing lens configured to receive the combined phase-shifted reference beam and reflected object illumination beam and to focus the combined phase-shifted reference beam and reflected object illumination beam at a focal plane; and a digital recorder positioned at the focal plane and configured to record a spatially heterodyne hologram formed by the focused phase-shifted reference beam and reflected object illumination beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for shearlessly recording a hologram comprising:
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providing a first beam of light; splitting the first beam into a reference beam and an object illumination beam; imparting a phase shift to the reference beam; illuminating an object with the object illumination beam; substantially coaxially combining the phase-shifted reference beam and a portion of the object illumination beam reflected from the object; focusing the phase-shifted reference beam and reflected object illumination beam at a focal plane; and recording a spatially heterodyne hologram formed at the focal plane by the focused phase-shifted reference beam and reflected object illumination beam. - View Dependent Claims (18, 19, 20)
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Specification