US 11,835,922 B2
Augmented reality device based on waveguide with holographic diffractive grating structure and apparatus for recording the holographic diffractive grating structure
Nikolay Victorovich Muravev, Podolsk (RU); Vladimir Nikolaevich Borisov, Saint Petersburg (RU); and Mikhail Vyacheslavovich Popov, Krasnogorsk (RU)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Aug. 25, 2021, as Appl. No. 17/411,916.
Claims priority of application No. RU2020128284 (RU), filed on Aug. 25, 2020; and application No. 10-2021-0072323 (KR), filed on Jun. 3, 2021.
Prior Publication US 2022/0066389 A1, Mar. 3, 2022
Int. Cl. G03H 1/04 (2006.01); G02B 27/01 (2006.01)
CPC G03H 1/0402 (2013.01) [G02B 27/0172 (2013.01); G02B 2027/0174 (2013.01); G03H 2001/0441 (2013.01); G03H 2223/18 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus for recording a holographic diffractive grating structure, the apparatus comprising:
a light source configured to output light;
a beam splitter configured to split the light output from the light source into a first light beam and a second light beam;
a first amplitude filter and a first triangular prism that are provided on a path of the first light beam; and
a second amplitude filter and a second triangular prism that are provided on a path of the second light beam,
wherein the first amplitude filter is provided such that a first part of the first light beam is directed to the first triangular prism without passing through the first amplitude filter and a second part of the first light beam, which is different from the first part, is directed to the first triangular prism after being attenuated by passing through the first amplitude filter,
wherein the first triangular prism is provided such that the first part of the first light beam is incident on a first surface of the first triangular prism, which corresponds to one of equal sides of an isosceles triangle, and exits through a first exit surface of the first triangular prism, which corresponds to a base of the isosceles triangle, and the second part of the first light beam is incident on a second surface of the first triangular prism, which corresponds to the other side of the equal sides of the isosceles triangle, and exits through the first exit surface,
wherein the second triangular prism is provided such that the second light beam is attenuated by passing through the second amplitude filter, is incident on a first surface of the second triangular prism, and exits through a second exit surface of the second triangular prism, the second exit surface of the second triangular prism being separated from and parallel to the first exit surface of the first triangular prism, and
wherein a diffractive grating material for recording the holographic diffractive grating structure is provided between the first exit surface of the first triangular prism and the second exit surface of the second triangular prism.