Forum Discussion
What is the angular resolution of the DK2?
I've seen people say anywhere from just under 8 to 9 pixels/degree, and that it is a mostly uniform angular resolution across the FOV. Where does this number come from? If I try to calculate it t...
It isn't constant, the lens introduces pincushion distortion, so the the pixels are squished closer together at the center of the lens.
Also it isn't really magnifying, or perhaps you could say it is magnifying by a factor of infinity. Collimated light means no focal distance, so you cant take a ratio of the focal distance on the screen side to the viewer side.
Another consequence of collimation, the pixels per degree at the center is constant as you move your eye around relative to the lens. So eye relief and IPD dont really affect it. You can confirm this by taking off the HMD and looking at the virtual image from a distance while moving the HMD around. The pixels appear just as big as when you wear it right at the center, though they distort more rapidly off center.
Also it isn't really magnifying, or perhaps you could say it is magnifying by a factor of infinity. Collimated light means no focal distance, so you cant take a ratio of the focal distance on the screen side to the viewer side.
Another consequence of collimation, the pixels per degree at the center is constant as you move your eye around relative to the lens. So eye relief and IPD dont really affect it. You can confirm this by taking off the HMD and looking at the virtual image from a distance while moving the HMD around. The pixels appear just as big as when you wear it right at the center, though they distort more rapidly off center.