US 12,231,169 B2
Eye safe diverged beam optical wireless communications system
William J. Brown, Durham, NC (US); and Hannah Clark, Durham, NC (US)
Assigned to 8 RIVERS CAPITAL, LLC, Durham, NC (US)
Filed by 8 RIVERS CAPITAL, LLC, Durham, NC (US)
Filed on Apr. 29, 2024, as Appl. No. 18/649,599.
Application 18/649,599 is a continuation of application No. 17/760,677, granted, now 11,973,538, previously published as PCT/IB2020/058684, filed on Sep. 17, 2020.
Claims priority of provisional application 62/901,391, filed on Sep. 17, 2019.
Prior Publication US 2024/0283540 A1, Aug. 22, 2024
Int. Cl. H04B 10/50 (2013.01); G02B 5/02 (2006.01); G02B 19/00 (2006.01); H04B 10/11 (2013.01)
CPC H04B 10/503 (2013.01) [G02B 5/02 (2013.01); G02B 19/0047 (2013.01); G02B 19/009 (2013.01); H04B 10/11 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A diverged beam optical transmitter comprising:
a laser source configured to emit a light beam;
one or more lenses configured to collimate the light beam to an overall divergence of the light beam; and
a diffuser placed between the laser source and the one or more lenses, and configured to increase an intrinsic divergence of the light beam and to fill some portion of the one or more lenses such that the light beam is eye safe after the one or more lenses,
wherein the overall divergence of the light beam and the intrinsic divergence of the light beam are independently controllable and the overall divergence of the light beam is greater than the intrinsic divergence of the light beam.