US 11,720,060 B2
Single-shot Fresnel non-coherent correlation digital holographic device based on polarization-oriented planar lens
Jun Liu, Shanghai (CN); Dong Liang, Shanghai (CN); and Qiu Zhang, Shanghai (CN)
Assigned to Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences, Shanghai (CN)
Filed by Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences, Shanghai (CN)
Filed on Feb. 9, 2021, as Appl. No. 17/171,561.
Application 17/171,561 is a continuation of application No. PCT/CN2019/084899, filed on Apr. 29, 2019.
Claims priority of application No. 201810916579.4 (CN), filed on Aug. 13, 2018.
Prior Publication US 2021/0181675 A1, Jun. 17, 2021
Int. Cl. G03H 1/04 (2006.01); G03H 1/06 (2006.01); G03H 1/22 (2006.01)
CPC G03H 1/0443 (2013.01) [G03H 1/06 (2013.01); G03H 2001/2265 (2013.01); G03H 2222/31 (2013.01); G03H 2223/20 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A holographic device, comprising
a polarization-oriented planar lens,
a focusing element, the focusing element being attached to the polarization-oriented planar lens with a separation distance of 0 mm and comprising a focal point,
a half-wave plate with a small hole, wherein the focal point of the focusing element is in the small hole of the half-wave plate, and
a polarization imaging camera,
wherein an incident light passes through the polarization-oriented planar lens and the focusing element, and is divided into a left-handed circularly polarized light and a right-handed circularly polarized light with different polarization, and one of the left-handed circularly polarized light and the right-handed circularly polarized light is a focused beam, and the other of the left-handed circularly polarized light and right-handed circularly polarized light is a parallel or divergent beam,
the focused beam passes through the small hole of the half-wave plate,
the parallel or divergent beam passes through the half-wave plate, wherein polarization of the parallel or divergent beam is changed to be consistent with the polarization of the focused beam so that both become left-handed or right-handed circularly polarized beams and are overlapped in the polarization imaging camera to obtain an interferometric pattern of recorded object information.