US 12,332,600 B2
Hologram image normalization method for holographic printer
Ji Soo Hong, Seoul (KR); Sung Hee Hong, Seoul (KR); Young Min Kim, Seoul (KR); Jin Soo Jeong, Seoul (KR); and Byoung Hyo Lee, Seoul (KR)
Assigned to Korea Electronics Technology Institute, Seongnam-si (KR)
Appl. No. 18/013,305
Filed by Korea Electronics Technology Institute, Seongnam-si (KR)
PCT Filed Dec. 15, 2021, PCT No. PCT/KR2021/019025
§ 371(c)(1), (2) Date Dec. 28, 2022,
PCT Pub. No. WO2023/113062, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 10-2021-0177361 (KR), filed on Dec. 13, 2021.
Prior Publication US 2024/0111250 A1, Apr. 4, 2024
Int. Cl. G03H 1/04 (2006.01); G03H 1/02 (2006.01); G03H 1/22 (2006.01)
CPC G03H 1/0476 (2013.01) [G03H 1/024 (2013.01); G03H 1/2249 (2013.01); G03H 2001/0224 (2013.01); G03H 2001/0232 (2013.01); G03H 2001/2263 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A holographic printing method comprising:
generating a hologram for an n-th hogel constituting a hologram, the n-th hogel being a hogel located at an n-th position among a plurality of hogels;
encoding the generated hologram;
normalizing the encoded hologram;
loading the normalized hologram on a spatial light modulator (SLM);
restoring an original hologram from the hologram loaded on the SLM, and recording the original hologram on a holographic material;
moving a position of a stage where the holographic material is placed to a position on the holographic material where an (n+1)-th hogel is recorded; and
waiting until the moved stage is stabilized,
wherein generating, encoding, and normalizing for the (n+1)-th hogel are performed in parallel with loading and recording for the n-th hogel and moving and waiting for the (n+1)-th hogel.