Internet Biophotonics XI, Internet Invited Lecture


Zeev Zalevsky, Bar Ilan University, Israel

Discussion Live Chat Presentation (8.46 Mb)


Digital imaging systems as well as human vision system have limited capability for separation of spatial features. Therefore, the imaging resolution is limited. The reasons to this limitation are related to the effect of diffraction i.e. the finite dimensions of the imaging optics, the geometry of the sensing array and its sensitivity as well as the axial position of the object itself which may be out of focus. In this talk I will present novel photonic approaches and means to exceed the above mentioned limitations and eventually to allow having super resolved imaging systems.
Then, novel all optical extended depth of focus concept based on “interference” effect will be demonstrated for ophthalmic usage and implemented on conventional refractive devices, such as spectacles, contact lenses and intraocular lenses. This extended depth of focus technology is capable of simultaneously correcting various refractive errors, such as myopia, hyperopia, presbyopia, regular/irregular astigmatism, as well as their combinations.
In the last part of the talk a special device mounted on spectacles that allows translation of visual information into spatial tactile stimulation of the cornea, will be discussed. This device can lead blind people to “see” by providing a novel and a non-invasive sensory substitution allowing blind people to perceive images after teaching them to associate the tactile spatial feeling of the stimulation of their cornea to real spatial shapes and images.

Representing author


Prof. Zeev Zalevsky

Bar Ilan University

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