US 12,276,939 B2
Holographic image sensor
Seon Kyu Yoon, Gwangju (KR); and Jin Su Lee, Gwangju (KR)
Assigned to KOREA PHOTONICS TECHNOLOGY INSTITUTE, Gwangju (KR)
Filed by KOREA PHOTONICS TECHNOLOGY INSTITUTE, Gwangju (KR)
Filed on May 14, 2022, as Appl. No. 17/744,628.
Claims priority of application No. 10-2021-0192124 (KR), filed on Dec. 30, 2021.
Prior Publication US 2023/0213889 A1, Jul. 6, 2023
Int. Cl. G03H 1/04 (2006.01); G01J 1/42 (2006.01); G01J 9/02 (2006.01); H04N 23/55 (2023.01); H04N 23/56 (2023.01); H10F 39/12 (2025.01)
CPC G03H 1/0402 (2013.01) [G01J 1/42 (2013.01); G01J 9/02 (2013.01); G03H 1/0443 (2013.01); H04N 23/55 (2023.01); H04N 23/56 (2023.01); H10F 39/12 (2025.01); G03H 2001/0428 (2013.01); G03H 2001/0452 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A holographic image sensor, comprising:
a lens focusing object light incident from outside of the holographic image sensor to the holographic image sensor;
a filter transmitting a predetermined wavelength band of light of the focused object light;
a reference light source directly emitting reference light having the predetermined wavelength band to the light receiving unit;
a light receiving unit receiving interference light caused by the predetermined wavelength band of light of the focused object light and the reference light to sense a holographic image; and
a barrier rib preventing other light than the object light and the reference light from being incident on the light receiving unit,
wherein the reference light source is attached to a position of the barrier rib such that the reference light source emits the reference light having the predetermined wavelength band directly to the light receiving unit without a separate optical structure between the reference light source and the light receiving unit.