Experiment Research on Binocular Perceptual Characteristics around Peripheral Vision for Development of Head Mounted Display with Wide View

The head mounted display （HMD） is widely used in virtual reality technology. In common HMD, however, the binocular disparity is set to an equal fixed value in the entire range of view. Such HMD systems have several shortcomings when used for wide views. In this study, in order to realize a natural stereo sensation of HMD with wide view, we measure the characteristics of binocular stereo perception and binocular light perception. Results show that both the stereoacuity and light sensitivity decrease as the retina＇s eccentricity increases from fovea to periphery. However, the decrease of the stereoacuity is more rapid than that of the light sensitivity. These results suggest that the binocular disparity at the peripheral field should be small, otherwise double images would be observed instead of a stereo view. Based on the results we develop a relative binocular stereoacuity model which can be applied for the design of HMD systems with wide view.

VEGO:A novel design towards customizable and adjustable head-mounted display for VR

Background Virtual Reality(VR)technologies have advanced fast and have been applied to a wide spectrum of sectors in the past few years.VR can provide an immersive experience to users by generating virtual images and displaying the virtual images to the user with a head-mounted display(HMD)which is a primary component of VR.Normally,an HMD contains a list of hardware components,e.g.,housing pack,micro LCD display,microcontroller,optical lens,etc.Settings of VR HMD to accommodate the user's inter-pupil distance(IPD)and the user's eye focus power are important for the user's experience with VR.Methods Although various methods have been developed towards IPD and focus adjustments for VR HMD,the increased cost and complexity impede the possibility for users who wish to assemble their own VR HMD for various purposes,e.g.,DIY teaching,etc.In our paper,we present a novel design towards building a customizable and adjustable HMD for VR in a cost-effective manner.Modular design methodology is adopted,and the VR HMD can be easily printed with 3D printers.The design also features adjustable IPD and variable distance between the optical lens and the display.It can help to mitigate the vergence and accommodation conflict issue.Results A prototype of the customizable and adjustable VR HMD has been successfully built up with off-the-shelf components.A VR software program running on Raspberry Pi board has been developed and can be utilized to show the VR effects.A user study with 20 participants is conducted with positive feedback on our novel design.Conclusions Modular design can be successfully applied for building up VR HMD with 3D printing.It helps to promote the wide application of VR at affordable costs while featuring flexibility and adjustability.

Monochrome HUD’s Imaging Projector Based on Laser-DMD System

Design and tolerance of a new head up display’s projector system is reported. It is based on laser-micro display modules. We designed optical diffraction limited modules and some of our novelties were compactness, using common material and spherical lenses in optical design, easy and economical manufacturing process, uniform intensity and minimum aberrations of final image, economical and repairable designed system. Projector magnification is 10.0X and diagonal of image plane is 76.2 mm. ZEMAX software is employed for optical design and tolerance.

Augmented reality assisted surgery： a urologic training tool

Augmented reality is widely used in aeronautics and is a developing concept within surgery. In this pilot study, we developed an application for use on Google Glass optical head-mounted display to train urology residents in how to place an inflatable penile prosthesis. We use the phrase Augmented Reality Assisted Surgery to describe this novel application of augmented reality in the setting of surgery. The application demonstrates the steps of the surgical procedure of inflatable penile prosthesis placement. It also contains software that allows for detection of interest points using a camera feed from the optical head-mounted display to enable faculty to interact with residents during placement of the penile prosthesis. Urology trainees and faculty who volunteered to take part in the study were given time to experience the technology in the operative or perioperative setting and asked to complete a feedback survey. From 30 total participants using a lO-point scale, educational usefulness was rated 8.6, ease of navigation was rated 7.6, likelihood to use was rated 7.4, and distraction in operating room was rated 4.9. When stratified between trainees and faculty, trainees found the technology more educationally useful, and less distracting. Overall, 81% of the participants want this technology in their residency program, and 93% see this technology in the operating room in the future. Further development of this technology is warranted before full release, and further studies are necessary to better characterize the effectiveness of Augmented Reality Assisted Surgery in urologic surgical training.