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3-D Visualization and Imaging Systems Laboratory
Hong Hua's 3-D Visualization and Imaging Systems Laboratory specializes in a wide variety of optical technologies enabling advanced 3-D displays, 3-D visualization systems and collaborative immersive virtual and augmented environments, and novel imaging systems for medicine and surveillance applications. The 3DVIS Lab also uses 3-D displays to better understand human visual perception and visual artifacts and investigates design principles for effective human-computer interface in augmented environments.
Accuracy of the Skin Depth Correction for Metallic Nanoparticle Polarizability
The McLeod lab's research shows that light scattering and optical trapping calculations based on the full volume of nanoparticles is more accurate than calculations based on only the skin depth. This study suggests that a simpler model is more accurate than the skin depth model, which had been widely used by researchers for the past three decades. Read the published article.
Aspheric Metrology Laboratory
The Aspheric Metrology Laboratory headed by John E. Greivenkamp designs and builds advanced interferometric systems for metrology and optical testing. Research interests include ophthalmic and visual optics, ophthalmic instrumentation and measurements, interferometry and optical testing of aspheric and freeform surfaces, optical fabrication, optical system design, optical metrology systems, distance measurement systems, sampled imaging theory, and optics of electronic imaging systems.
Effects of Ray Position Sampling on the Visual Responses of 3D Light Field Displays
This study, out of the Hong Hua laboratory, investigates the effects of light ray sampling on the quality of the rendered focus cues and the visual responses of a viewer in light field displays. Accounting for both the specifications of a light field display system and the ocular factors of the human visual system the researchers systematically model and analyze the ray position sampling issue in the reconstruction of the light field. This characterizes the effect on the quality of the rendered retinal image and on the accommodative response in viewing a 3D light field display. Using a recently developed 3D light field display prototype, Hua's lab further validates the effects of ray position sampling on the resolution and accommodative response of a light field display that matches with theoretical characterizations.
Gigapixel and 1440-Perspective Extended-Angle Display by Megapixel MEMS-SLM
A recent publication from Takashima Lab., “Gigapixel and 1440-perspective extended-angle display by megapixel MEMS-SLM” demonstrates a drastic increase in pixel counts of a display device for AR/VR and lidar application. A novel time multiplexed and pulsed illumination method effectively squeezed giga-pixel (109 pixels) output from a commercially available mega-pixel (106 pixels) display device while routing image into different directions.
High-Speed Lens-Free Holographics Sensing of Protein Molecules Using Quantitative Agglutination Assays
The fabrication of three-dimensional (3D) microscale structures is critical for many applications, including strong and lightweight material development, medical device fabrication, microrobotics, and photonic applications. While 3D microfabrication has seen progress over the past decades, complex multicomponent integration with small or hierarchical feature sizes is still a challenge. Dr. Jeffrey Melzer and Dr. Euan McLeod have precisely fabricated 3D microstructures from two types of micron-scale building blocks linked by biochemical interactions using an optical positioning and linking (OPAL) platform based on optical tweezers technology.
How a Tiny Loop of Light Could Help Fight COVID (And So Much More!)
At the Wyant College of Optical Sciences’s Little Sensor Lab, researchers are building sensors that have three key advantages: They can detect low concentrations of substances, provide results in 30 seconds or less, and they don’t need to label or amplify the substance they’re trying to detect. But perhaps the best part? They may be helpful in detecting and treating COVID-19, cancer and scores of other harmful or deadly contaminants.
Theoretical Solid-State Optics Group
The Theoretical Solid-State Optics Group led by Rolf Binder focuses on the optical properties of semiconductor structures. Using microscopic quantum-mechanical many-body theories, including nonequilibrium Green's functions, the group pursues projects ranging from basic physical studies to application-oriented simulations. Recent and ongoing examples include slow- and fast-light effects in bulk semiconductors and semiconductor heterostructures, optical refrigeration of semiconductors, optical and elastic properties of semiconductor nanomembranes, optical properties of graphene, and pattern formation and control in quantum fluids realized by exciton polaritons in semiconductor microcavities.