Shoaib R. Soomro
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The organizations/institutes from the scholar's latest article
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Shoaib R. Soomro has a total of 1 co-authors. Here are the top co-authors by number of shared publications:
Hakan Urey
Koc University, Electrical Engineering Department, Optical Microsystems Laboratory, Sariyer, Istanbul, Turkey
2 shared publications
Latest Publications
- 24 July 2017
- Published by Optica Publishing Group in Applied Optics
- Vol. 56 (22) , 6108-6113
Light-efficient augmented reality 3D display using highly transparent retro-reflective screen
We propose and demonstrate a light-efficient 3D display using a highly transparent desktop-sized augmented reality screen. The display consists of a specially designed transparent retro-reflective screen and a pair of low-power pico-projectors positioned close to the viewer’s eyes to provide stereo views. The transfer screen is an optically clear sheet partially patterned with retro-reflective microspheres for high optical gain. The retro-reflective material buried in the screen reflects incident light back towards the projectors with a narrow scattering angle and facilitates the viewer to perceive a very bright content. The tabletop prototype mainly consists of an in-house fabricated large augmented reality (AR) screen () and a pair of laser-scanning 30 lumen pico-projectors. The display is tested for different viewing configurations, and different display parameters, such as retro-reflective coefficient, eye-box size, polarization maintainability, stereo crosstalk, and brightness, are examined. The AR prototype display provides 75% optical transparency, exceptional brightness (up to when viewed through beam splitters and with bare eyes), and negligible crosstalk in 3D mode ( and when viewed through beam splitters and polarizers, respectively) for the working distance of up to 2 m.- 24 July 2017
- Published by Optica Publishing Group in Applied Optics
- Vol. 56 (22) , 6108-6113
Light-efficient augmented reality 3D display using highly transparent retro-reflective screen
We propose and demonstrate a light-efficient 3D display using a highly transparent desktop-sized augmented reality screen. The display consists of a specially designed transparent retro-reflective screen and a pair of low-power pico-projectors positioned close to the viewer’s eyes to provide stereo views. The transfer screen is an optically clear sheet partially patterned with retro-reflective microspheres for high optical gain. The retro-reflective material buried in the screen reflects incident light back towards the projectors with a narrow scattering angle and facilitates the viewer to perceive a very bright content. The tabletop prototype mainly consists of an in-house fabricated large augmented reality (AR) screen () and a pair of laser-scanning 30 lumen pico-projectors. The display is tested for different viewing configurations, and different display parameters, such as retro-reflective coefficient, eye-box size, polarization maintainability, stereo crosstalk, and brightness, are examined. The AR prototype display provides 75% optical transparency, exceptional brightness (up to when viewed through beam splitters and with bare eyes), and negligible crosstalk in 3D mode ( and when viewed through beam splitters and polarizers, respectively) for the working distance of up to 2 m.- Open Access
- 11 October 2016
- Published by Optica Publishing Group in Optics Express
- Vol. 24 (21) , 24232-24241
Design, fabrication and characterization of transparent retro-reflective screen
A transparent retro-reflective screen, which can be used as head-up-display (HUD) or a see-through screen for head mounted projection displays (HMPD) is proposed. The high optical gain of screen enables the use of low power projectors to produce very bright content. The screen assembly is based on retro-reflective microspheres, patterned on an optically clear substrate using steel stencil as a shadow mask. The incident light is retro-reflected as a narrow angular cone to create an eyebox for the viewer. The optical gain and transparency of screen is varied by changing the fill factor of the mask. The optical design and fabrication of the screen is presented. The retro-reflective and transmission characteristics of screen are evaluated. The impact of fill factor on screen luminance and transparency is studied. The screen provides high luminance (up to 280cd/m2 with 50% transparency) from about 40cm to >3m when used with a low power (15 lumen) mobile projector. Unlike regular diffusers, luminance remains nearly constant with projection distance. Furthermore, the screen offers prominent see-through capability with small degradation in modulation transfer function for transmitted light. For a particular camera and imaging configuration, MTF10 (10% cutoff) for 50% transparent screen is reduced from 37 cyc/deg to 30 cyc/deg when screen is inserted at an intermediate distance.
- 11 October 2016
- Published by Optica Publishing Group in Optics Express
- Vol. 24 (21) , 24232-24241
Open AccessDesign, fabrication and characterization of transparent retro-reflective screen
A transparent retro-reflective screen, which can be used as head-up-display (HUD) or a see-through screen for head mounted projection displays (HMPD) is proposed. The high optical gain of screen enables the use of low power projectors to produce very bright content. The screen assembly is based on retro-reflective microspheres, patterned on an optically clear substrate using steel stencil as a shadow mask. The incident light is retro-reflected as a narrow angular cone to create an eyebox for the viewer. The optical gain and transparency of screen is varied by changing the fill factor of the mask. The optical design and fabrication of the screen is presented. The retro-reflective and transmission characteristics of screen are evaluated. The impact of fill factor on screen luminance and transparency is studied. The screen provides high luminance (up to 280cd/m2 with 50% transparency) from about 40cm to >3m when used with a low power (15 lumen) mobile projector. Unlike regular diffusers, luminance remains nearly constant with projection distance. Furthermore, the screen offers prominent see-through capability with small degradation in modulation transfer function for transmitted light. For a particular camera and imaging configuration, MTF10 (10% cutoff) for 50% transparent screen is reduced from 37 cyc/deg to 30 cyc/deg when screen is inserted at an intermediate distance.