We introduce the design of statically foveated head-mounteddisplays based on a new perceptual-driven approach, aiming to offer a large field of view and high resolution with imperceptible image quality degradation el...
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Conventional integral imaging based head-mounted light fielddisplay systems suffer from a small viewing window to minimize crosstalk artifacts and achieve a balanced optical performance. In this paper, we present a m...
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Conventional integral-imaging based light fielddisplays are often subject to the tradeoffs among spatial resolution, depth of field, view density, and eyebox size. This paper will review several time-multiplexed meth...
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Backgrounddepth sensor is an essential element in virtual and augmented reality devices to digitalize users'environment in real *** current popular technologies include the stereo,structured light,and Time-of-Fli...
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Backgrounddepth sensor is an essential element in virtual and augmented reality devices to digitalize users'environment in real *** current popular technologies include the stereo,structured light,and Time-of-Flight(ToF).The stereo and structured light method require a baseline separation between multiple sensors for depth sensing,and both suffer from a limited measurement *** ToF depth sensors have the largest depth range but the lowest depth map *** overcome these problems,we propose a co-axial depth map sensor which is potentially more compact and cost-effective than conventional structured light depth ***,it can extend the depth range while maintaining a high depth map ***,it provides a high-resolution 2 d image along with the 3ddepth *** This depth sensor is constructed with a projection path and an imaging *** two paths are combined by a beamsplitter for a co-axial *** the projection path,a cylindrical lens is inserted to add extra power in one direction which creates an astigmatic *** depth measurement,the astigmatic pattern is projected onto the test scene,and then the depth information can be calculated from the contrast change of the reflected pattern image in two orthogonal *** extend the depth measurement range,we use an electronically focus tunable lens at the system stop and tune the power to implement an extendeddepth range without compromising depth *** In the depth measurement simulation,we project a resolution target onto a white screen which is moving along the optical axis and then tune the focus tunable lens power for three depth measurement subranges,namely,near,middle and *** each sub-range,as the test screen moves away from the depth sensor,the horizontal contrast keeps increasing while the vertical contrast keeps decreasing in the reflected ***,the depth information can be obtained by computing the contrast ratio between fe
This paper presents a manufacturable monocular laparoscopic objective lens design that acquires simultaneous stereoscopic views via two apertures and a custom prism and an additional wider field of view via a central ...
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The rendering of mutual occlusion in optical see-through head-mounteddisplays (OST-HMds) poses several complex challenges. This paper discusses in detail these challenges and presents a novel optical architecture for...
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We explore a new perceptual-driven static approach to design a foveated head-mounteddisplay potentially offering nearly imperceptible degradation of image quality and potentially realizes large field of view and high...
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This paper presents the design of a digitally switchable multi-focal micro lens array to extend the depth of field without sacrificing the spatial resolution in integral imagingsystems. The switchable multi-focal mic...
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Occluding the Left Atrial Appendage (LAA) with percutaneous devices is now a standard clinical practice for patients with non-valvular atrial fibrillation to reduce the risk of stroke. These devices have pre-defined m...
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