How Does Augmented Reality Work?

In order to understand how augmented reality technology works, one must first understand its objective: to bring computer generated objects into the real world, which only the user can see.In most AR  applications, a user will see both synthetic and natural light. This is done by overlaying projected images on top of a pair of see-through goggles or glasses, which allow the images and interactive virtual objects to layer on top of the user's view of the real world. Augmented Reality devices are often self-contained, meaning that unlike the Oculus Rift or HTC Vive VR headsets, they are completely untethered and do not need a cable or desktop computer to function.

How Do Augmented Reality Devices Work (Inside)?

It can be displayed on a wide variety of displays, from screens and monitors, to handheld devices or glasses. Google Glass and other head-up displays (HUD) put AR directly onto your face, usually in the form of glasses. Handheld devices employ small displays that fit in users hands, including smartphones and tablets. As reality technologies continue to advance, it devices will gradually require less hardware and start being applied to things like contact lenses and virtual retinal displays.

Key Components to Augmented Reality Devices

1.Sensors and Cameras
Sensors are usually on the outside of the augmented reality device, and gather a user's real world interactions and communicate them to be processed and interpreted. Cameras are also located on the outside of the device, and visually scan to collect data about the surrounding area.

2.Projection
While “Projection Based Augmented Reality” is a category in-itself, we are specifically referring to a miniature projector often found in a forward and outward-facing position on wearable AR  headsets.

3.Processing
Augmented reality devices are basically mini-supercomputers packed into tiny wearable devices. These devices require significant computer processing power and utilize many of the same components that our smartphones do

4.Reflection
Mirrors are used in devices to assist with the way your eye views the virtual image. Some augmented reality devices may have “an array of many small curved mirrors” (as with the Magic Leap augmented reality device) and others may have a simple double-sided mirror with one surface reflecting incoming light to a side-mounted camera and the other surface reflecting light from a side-mounted display to the user's eye.

How Augmented Reality is Controlled?

Augmented reality devices are often controlled either by touch a pad or voice commands. The touch pads are often somewhere on the device that is easily reachable. They work by sensing the pressure changes that occur when a user taps or swipes a specific spot. Voice commands work very similar to the way they do on our smartphones. A tiny microphone on the device will pick up your voice and then a microprocessor will interpret the commands. Voice commands, such as those on the Google Glass augmented reality device, are pre programmed from a list of commands that you can use.

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