US 12,455,532 B2
Device and method for manufacturing holographic optical elements
Johannes Hofmann, Tuebingen (DE); and Reinhold Fiess, Durbach (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/776,049
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Nov. 5, 2020, PCT No. PCT/EP2020/081089
§ 371(c)(1), (2) Date May 11, 2022,
PCT Pub. No. WO2021/129970, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 10 2019 220 511.9 (DE), filed on Dec. 23, 2019.
Prior Publication US 2022/0404768 A1, Dec. 22, 2022
Int. Cl. G03H 1/02 (2006.01); G02B 26/08 (2006.01)
CPC G03H 1/0272 (2013.01) [G02B 26/0825 (2013.01); G03H 2001/0216 (2013.01); G03H 2001/0232 (2013.01); G03H 2223/24 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A device for manufacturing holographic optical elements, comprising:
at least two partial light beams and one interference light beam;
one deformable mirror per partial light beam of the at least two partial light beams;
a control unit configured to actuate each of the deformable mirrors independently to adapt a wavefront of the partial light beams; and
holographic film;
wherein:
the deformable mirrors are situated so as to each reflect precisely one partial light beam of the least two partial light beams and to direct the reflected partial light beam on the holographic film; and
the interference light beam is directed on the holographic film to interfere with the reflected partial light beams to simultaneously generate at least two holographic optical elements.