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US 2025/0138478 A1Published application
Hologram reading device and hologram reading method
AssigneeElectronics and Telecommunications Research Institute
InventorsYong Hae KIM, Jong-Heon YANG, Kyunghee CHOI, Jae-Eun PI, Chi-Sun HWANG
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Abstract
Disclosed are a hologram reading device and a hologram reading method, the hologram reading device including a hologram element having a hologram pattern, a detector configured to detect a reflection beam generated in the hologram pattern, and a controller connected to the detector and configured to read information the hologram pattern using a detection signal of the reflection beam, wherein the hologram pattern may have the width or diameter smaller than 225 nm.
Claims10
A hologram reading device comprising:
- a hologram element having a hologram pattern;
- a detector configured to detect a reflection beam generated in the hologram pattern;
- and
- a controller connected to the detector and configured to read information of the hologram pattern using a detection signal of the reflection beam,
- wherein the hologram pattern has a width or diameter smaller than 225 nm.
2 more elements
A hologram reading method comprising:
- irradiating a hologram pattern with a first laser beam of a first wavelength;
- detecting a reflection beam generated by the first laser beam;
- determining whether necessary information is present in a hologram image generated by the reflection beam;
- and
- acquiring the necessary information by irradiating the hologram pattern with a second laser beam having a second wavelength shorter than the first wavelength when the necessary information is not present in the hologram image.
2 more elements
Dependencies are inferred from the claim text.