US 12,487,381 B2
Diffractive optical element and terminal device
Zhanshi Yao, Shenzhen (CN); Rui Guo, Shenzhen (CN); and Xiaolu Song, Shenzhen (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Jul. 24, 2023, as Appl. No. 18/357,458.
Application 18/357,458 is a continuation of application No. PCT/CN2021/127093, filed on Oct. 28, 2021.
Claims priority of application No. 202110102133.X (CN), filed on Jan. 26, 2021.
Prior Publication US 2023/0367129 A1, Nov. 16, 2023
Int. Cl. G02B 5/18 (2006.01); G02B 27/01 (2006.01); G02B 27/44 (2006.01)
CPC G02B 5/18 (2013.01) [G02B 5/1861 (2013.01); G02B 27/44 (2013.01); G02B 27/0172 (2013.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A diffractive optical element, comprising:
a plurality of grating components periodically distributed in a first dimension, wherein:
each grating component of the plurality of grating components comprises N optical waveguides,
the N optical waveguides comprise M optical waveguides that periodically change in a second dimension,
at least two of the M optical waveguides that periodically change in the second dimension have different structures, and
an included angle between the second dimension and the first dimension is greater than 0 degrees and less than 180 degrees, N is an integer greater than 1, and M is an integer greater than 1 and not greater than N.