INTERFERENCE LIGHT GENERATION ELEMENT AND HOLOGRAM RECORDING DEVICE
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United States of America Patent
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Issued Date -
Jun 13, 2024
app pub date -
Feb 28, 2022
filing date -
Mar 29, 2021
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Abstract
A hologram recording device includes an image sensor and a light interference generator that is attached to an imaging surface of the image sensor. The light interference generator is configured to generate two light waves whose phases are different from each other from an incident object light, and the image sensor is configured to record interference fringes that are formed from the two light waves as a hologram. The light interference generator includes a first birefringent material, a phase shifter array configured to spatially divide a polarization component whose polarization direction is parallel to or orthogonal to an optic axis of the first birefringent material to change a phase difference in two or more ways, and a polarizer whose transmission axis is in a direction that is inclined with respect to the optic axis of the first birefringent material. The first birefringent material, phase shifter array, and polarizer are arranged in this order starting from a side of incidence of light.
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