The function of the motion tracker is to estimate the current roll, pitch and yaw angles of the head mounted display (HMD), which allows the 3D game to know what you are looking at and render the scene accordingly.
The original Rift uses the following configuration (as nicely shown by ifixIt):
Invensense MPU-6000, gyroscope and accelerometer sensor
Honeywell HMC5983, magnetic field sensor / compass
ST 32F103C8, ARM 32 bit microcontroller (with USB connection)
The concept is surprisingly simple and low tech. A LCD panel presents seperate pictures to the left and right eye, lenses are used to place the panel close to the eyes and hence produce a wide field of view (FOV). What I read about these very simple homemade glasses made me curios. The people on the mtbs3d forums (the birth-place of the rift) claimed that the 3D effect is fantastic and the head tracker allows the games to become extremely immersive.
It was clear, I had to try to build some of these fancy 3D goggles.
These posts will document the progress I have made, the problem I encountered and the improvements I came up with along the way.
For a recent project I needed a bandpass filter in the microwave range, made from non-magnetic materials. Remembering this very nice article from Paul Wade, I decided to give it a shot and roll my own. As the results turned out to be spectacular, I had to share this experience.
Well, what to do with a perfectly fine flatscreen, found in the trash with a blown backlight?
Convert it to solar power of course!
It works surprisingly well as a secondary monitor. Provided there is enough sunlight, the image is quite crisp and colourful. And the best thing is: The brighter the sun, the better it looks -- while the picture on an ordinary monitors becomes unrecognisable.
Some 3D plots I have done recently for a presentation. They were done with Python and Mayavi. They show how a hypothetical hidden photon field would look like. The emitting structure is a microwave cavity, with a strong electromagnetic field inside. This field is the driving force for the hidden photon field which can penetrate the cavity walls and propagate into space. Unfortunately you can not see the cavity geometry itself in these pictures.
You don't need to understand any of this, just enjoy the visuals...