The most significant risks that could jeopardize the project’s success are related to the lens and mirror not working correctly. For example, the screen might appear to have double images if our 1 mm beam splitter is too thick, or it could appear out of focus if the screen isn’t placed exactly at the lens’s focal point. In addition, the screen could be warped by the beam splitter unless the angle is correct. Finally, the beam splitter is 50% transparent and 50% reflective, but the screen’s display might be too dim or too bright compared to the outside world. We’re managing these risks by allowing extra time and money in our budget for changes that might need to be made to the lens and mirror system.
This week, we also made changes to the existing design in terms of its screen. Instead of using a large screen that spans the width of the goggles at the top, we’re using a simpler approach that shows the screen in a single eye. We made this decision so that we can use a simpler, more common approach and use more widely-used parts such as rectangular displays, lenses from Google Cardboard, and square beam splitters.
There aren’t any updates to the schedule because everything’s on time so far.