HOLOGRAM MANUFACTURING DEVICE AND HOLOGRAM MANUFACTURING METHOD
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United States of America
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Issued Date -
Jan 30, 2025
app pub date -
Oct 11, 2024
filing date -
Oct 11, 2024
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Abstract
A hologram manufacturing device includes a master hologram on which a diffraction grating is formed, a duplicate hologram disposed close to the master hologram, a first light source that emits, to the master hologram and the duplicate hologram, a first laser light that satisfies a Bragg diffraction condition in the diffraction grating, a second light source that emits, to the master hologram and the duplicate hologram, a second laser light that does not satisfy the Bragg diffraction condition in the diffraction grating, and a sensor that measures the second laser light. The hologram manufacturing device ends exposure of the duplicate hologram with the first laser light based on a measurement result of the sensor.
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