  Locating mobile devices precisely in indoor scenarios is a challenging task
because of the signal diffraction and reflection in complicated environments.
One vital cause deteriorating the localization performance is the inevitable
power dissipation along the propagation path of localization signals. In this
paper, we propose a high-accuracy localization scheme based on the resonant
beam system (RBS) and the binocular vision, i.e., binocular based resonant beam
localization (BRBL). The BRBL system utilizes the energy-concentrated and
self-aligned transmission of RBS to realize high-efficiency signal propagation
and self-positioning for the target. The binocular method is combined with RBS
to obtain the three-dimensional (3-D) coordinates of the target for the first
time. To exhibit the localization mechanism, we first elaborate on the
binocular localization model, including the resonant beam transmission analysis
and the geometric derivation of the binocular method with RBS. Then, we
establish the power model of RBS, and the signal and noise models of beam spot
imaging, respectively, to analyse the performance of the BRBL system. Finally,
the numerical results show an outstanding performance of centimeter level
accuracy (i.e., $<5\mathrm{cm}$ in $0.4\mathrm{m}$ width and $0.4\mathrm{m}$
length effective range at $1\mathrm{m}$ vertical distance, $<13\mathrm{cm}$ in
$0.6\mathrm{m}$ width and $0.6\mathrm{m}$ length effective range at
$2\mathrm{m}$ vertical distance), which applies to indoor scenarios.
