We present the discovery of 3 quasar lenses in the Sloan Digital Sky Survey ( SDSS ) , selected using two novel photometry-based selection techniques .
The J0941+0518 system , with two point sources separated by 5.46 ^ { \prime \prime } on either side of a galaxy , has source and lens redshifts z _ { s } = 1.54 and z _ { l } = 0.343 .
The AO-assisted images of J2211+1929 show two point sources separated by 1.04 ^ { \prime \prime } , corresponding to the same quasar at z _ { s } = 1.07 , besides the lens galaxy and Einstein ring .
Images of J2257+2349 show two point sources separated by 1.67 ^ { \prime \prime } on either side of an E/S0 galaxy .
The extracted spectra show two images of the same quasar at redshift z _ { s } = 2.10 .
In total , the two selection techniques identified 309 lens candidates , including 47 known lenses , and 6 previously ruled out candidates .
55 of the remaining candidates were observed using NIRC2 and ESI at Keck Observatory , EFOSC2 at the ESO-NTT ( La Silla ) , and SAM and the Goodman spectrograph at SOAR .
Of the candidates observed , 3 were confirmed as lenses , 36 were ruled out , and 16 remain inconclusive .
Taking into account that we recovered known lenses , this gives us a success rate of at least 50/309 ( 16 % ) .
This initial campaign demonstrates the power of purely photometric selection techniques in finding lensed quasars .
Developing and refining these techniques is essential for efficient identification of these rare lenses in ongoing and future photometric surveys .