US 12,298,713 B2
Hologram printing method and apparatus using mask
Sung Hee Hong, Seoul (KR); Young Min Kim, Seoul (KR); Ji Soo Hong, Seoul (KR); and Jin Soo Jeong, Seoul (KR)
Assigned to Korea Electronics Technology Institute, Seongnam-si (KR)
Appl. No. 17/622,952
Filed by Korea Electronics Technology Institute, Seongnam-si (KR)
PCT Filed Dec. 2, 2020, PCT No. PCT/KR2020/017423
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2022/118995, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 10-2020-0166170 (KR), filed on Dec. 2, 2020.
Prior Publication US 2023/0047713 A1, Feb. 16, 2023
Int. Cl. G03H 1/04 (2006.01); G03H 1/02 (2006.01); G03H 1/12 (2006.01)
CPC G03H 1/0476 (2013.01) [G03H 1/02 (2013.01); G03H 1/12 (2013.01); G03H 2001/0224 (2013.01); G03H 2001/0292 (2013.01); G03H 2223/53 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A hologram printing method comprising:
generating a hologram fringe pattern;
splitting the hologram fringe pattern on a hogel basis;
generating the split hogels using a light modulator including a spatial light modulator (SLM);
masking a part of the generated hogel based on a result of using the light modulator after the light modulator is applied, wherein the masking comprises masking an edge portion except for a center portion of a hogel printing area; and
printing the masked hogel on a hologram medium, using beams which are centrally collected and an intensity of which decreases toward edges.