title: Wavefront-coding technique for inexpensive and robust retinal imaging.
abstract: We propose a hybrid optical-digital imaging system that can provide high-resolution retinal images without wavefront sensing or correction of the spatial and dynamic variations of eye aberrations. A methodology based on wavefront coding is implemented in a fundus camera in order to obtain a high-quality image of retinal detail. Wavefront-coded systems rely simply on the use of a cubic-phase plate in the pupil of the optical system. The phase element is intended to blur images in such a way that invariance to optical aberrations is achieved. The blur is then removed by image postprocessing. Thus, the system can provide high-resolution retinal images, avoiding all the optics needed to sense and correct ocular aberration, i.e., wavefront sensors and deformable mirrors.
authors: Justo
authors: J
authors: Arines
authors: Rene O
authors: RO
authors: Hernandez
authors: Stefan
authors: S
authors: Sinzinger
authors: A
authors: A
authors: Grewe
authors: Eva
authors: E
authors: Acosta
mesh_terms: D057128:Aberrometry / Q000295:instrumentation / Q000379:methods; D057108:Corneal Wavefront Aberration / Q000175:diagnosis; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation; D006801:Humans; D055096:Optical Devices; D061848:Optical Imaging / Q000295:instrumentation / Q000379:methods*; D055620:Optical Phenomena; D012160:Retina / Q000033:anatomy & histology* / Q000473:pathology; D012164:Retinal Diseases / Q000175:diagnosis