Liquid-crystal adaptive optics based on feedback interferometry for high-resolution retinal imaging.
A novel, to our knowledge, adaptive optical imaging system for high-resolution retinal imaging is described. The system is based on a feedback interferometer, in which two-dimensional output fringe intensity from a Mach-Zehnder interferometer with large radial shear is fed back, with the help of a video projector connected with a CCD camera, to an optically addressed phase-only liquid-crystal spatial light modulator. Experiments to verify the system performance have been conducted by use of an artificial eye consisting of a lens, an aberration plate, and a resolution test target. We observed that an image of the test target (mimicking a retina) blurred by the aberration plate (mimicking ocular aberrations) was successfully restored immediately after our adaptive optics system was activated.
Shirai
Tomohiro
T
Photonics Research Institute, National Institute of Advances Industrial Science and Technology, Tsukuba, Japan. t.shirai@aist.go.jp
D005137:Eye, Artificial; D005240:Feasibility Studies; D005246:Feedback; D005654:Fundus Oculi; D006801:Humans; D007368:Interferometry / Q000295:instrumentation* / Q000379:methods*; D055095:Optics and Photonics; D012160:Retina / Q000033:anatomy & histology*