Novel technologies are constantly under development for vision restoration in blind patients. Many of these emerging technologies are based on the projection of high intensity light patterns at specific wavelengths, raising the need for the development of specialized projection systems. Here we present and characterize a novel projection system that meets the requirements for artificial retinal...

The field of Augmented Reality (AR) is growing rapidly. Many of the options available now are very expensive, which is limiting to development of applications of the technology. We have designed and developed several opensource do-it-yourself (DIY) head-mounted displays for augmented reality (AR) that cost between $4 to $40. Optical design and simulations were completed using Zemax for a design...

Computational imaging has been using for depth of field extension, distance estimation and depth map for stereo imaging and displaying with great successfully, which are realized by using special designed imaging lens and optimized image post-processing algorithm. Several special coding structures have been presented, like cubic, generalized cubic, logarithmic, exponential, polynomial, spherica...

Background: Spectroscopy was one of the main applications of gratings. Most spectrometers today are based on reflection grating designs, since high quality transmission grating technologies have only matured over the last several years. Conventional cross-dispersion systems are based on the reflection grating. For traditional direct-vision or constant-dispersion grism, both the prism and gratin...

PURPOSE To test a pseudophakic eye model that allows for intraocular lens power (IOL) calculation, both in normal eyes and in extreme conditions, such as post-LASIK. METHODS PARTICIPANTS The model's efficacy was tested in 54 participants (104 eyes) who underwent LASIK and were assessed before and after surgery, thus allowing to test the same method in the same eye after only changing corne...

purpose: to assess the optical effect of the technis-z9000 iol decentration by lio-brennan mathematic-optical eye model. methods: the phantom with real eye parameters (lio-brennas) was used for iol technis-z9000 modeling with zemax code. modulation transfer function (mtf) and mtf contrast that represent the ratio of the image data to total object data in optical system were used for analysis. r...

It has been established that of all types aberrations following the implantation intraocular lenses, most significant is spherical, inherent in spherical optics various aspects. This paper proposes a method for reducing longitudinal aberration lenses by applying an additional optical layer onto their surface. To reduce aberration, thickness polytetrafluoroethylene (Teflon) was simulated program...

A four-rod/four-TEM00-mode beam off-axis parabolic mirror solar pumping concept is proposed. Four mirrors with 10 m2 total collection area were used as the primary concentrators to pump four 3.1-mm diameter, 84-mm length neodymium-doped yttrium aluminum garnet (Nd:YAG) rods within 2V-shaped cavities through secondary fused-silica aspheric and rectangular light guides, ensuring a good absorbed p...