  In this paper, we present some of the most prominent realizations of the HBD
concept in real experiments. We describe the first implementation of an HBD
that was made in the CERES experiment at CERN using a spectrometer based on a
doublet of hadron blind RICH detectors for the measurement of low-mass electron
pairs in pA and AA collisions at the SPS. We next present a detailed account of
a more extensive realization of the HBD that was made in the PHENIX experiment
for the measurement of low-mass electron pairs in central heavy-ion collisions
at RHIC, followed by a description of a very similar detector that is currently
under construction at J-PARC for the measurement of vector mesons though their
$e^+e^-$ decay in pA collisions. We conclude with a brief discussion of
possible evolutions of the HBD concept as well as possible developments and
uses of HBDs in experiments at the future Electron Ion Collider.
