VR systems differ in design, purpose, and price. In mobile stores, you can find applications with virtual reality on smartphones. By downloading them to your phone, you can try your first “VR experience” with virtual reality glasses.
In more complex systems, everything is much more interesting. The most important thing is a helmet or virtual reality glasses (we will consider the principle of their action a little later and in more detail). Such a system can work with a computer, smartphone, game console or absolutely not depend on any third-party resources.
Additionally, sensors may be included in the VR system to track user movement.
The virtual reality helmet consists of the following main parts:
1. The case and its components, such as fasteners and clamps.
2. Inside the helmet are two lenses that create the feeling of three-dimensional space and the screen to which the adapted picture is transmitted, separate for each eye. The helmet separates the image that sees the left and right eyes. When each eye sees its own image, the overall picture is as close as possible to the feeling of immersion.
3. Various IMU sensors that track the position of the head in space (gyroscope, accelerometer)
4. A microcircuit in which all computational processes take place.
Depending on the company and device model, this list may be expanded.
How free you will be in your movements using a VR helmet depends on the number of degrees of freedom. They are read by the tracking system in space:
3 degrees of freedom - a helmet with this parameter will allow you to make turns around its axis and look around.
6 degrees of freedom - with such characteristics you can easily move in space and in all planes.
The process of connecting and setting up VR glasses is quite simple and does not cause difficulties, but it is worth remembering that in order to work correctly, in most cases a powerful computer is required. Especially high requirements for the video card.
To achieve the best effect, some settings are provided in the helmets. For example, you can adjust the distance to the eyes, between the eyes, the sound volume, and other parameters. Some models are even equipped with a special technology that allows virtual reality glasses to be used by people from minus five to plus five.
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