US 11,815,856 B2
Method and system for recording digital holograms of larger objects in non-laboratory environment
Raj Kumar, Chandigarh (IN); Gaurav Dwivedi, Chandigarh (IN); and Omendra Singh, Chandigarh (IN)
Assigned to COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH, New Delhi (IN)
Filed by COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH, New Delhi (IN)
Filed on Jun. 25, 2020, as Appl. No. 16/912,604.
Claims priority of application No. 201911023585 (IN), filed on Jun. 14, 2019.
Prior Publication US 2020/0393792 A1, Dec. 17, 2020
Int. Cl. G03H 1/04 (2006.01); G03H 1/22 (2006.01); G02B 5/32 (2006.01); G02B 27/10 (2006.01)
CPC G03H 1/0443 (2013.01) [G02B 5/32 (2013.01); G02B 27/1006 (2013.01); G03H 1/2286 (2013.01); G03H 2223/19 (2013.01); G03H 2223/24 (2013.01); G03H 2223/53 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for producing a holographic image of an object, the method comprising:
dividing an input beam into a first beam, a second beam and a third beam using beam splitters;
steering the first beam, the second beam and the third beam into desired directions;
keeping the third beam unexpanded and making the third beam incident normally on a hologram recording plate; and
generating an object beam and a reference beam; and
wherein a holographic image is produced in a compact and vibration resistant manner by passing light scattered from the object through at least one negative lens to form a reduced image of the object and at least one positive lens that gathers more light.