Optical

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Light sources on the tracked object have position determined by multiple cameras.

Elements

Markers
Passive	Reflective markers shine when strobes hit
Active	Markers flashing LED lights (in sequence)
Camera Lights
Passive	Illuminates performance area with strobe lights
Active	low or normal lighting
Cameras	2D frames with position of marker from its view
Computer/Software	Interpret the views and positions into 3D space

X-IST FaceTracker

Pros and Cons of Optical Systems
Pros			Cons
	Accurate and fast (.2mm and up to 10,000 fps)			Ideally needs dedicated space
	Not affected by metal			Not available for portable rental
	No electromagnets			Longer calibration times
	IR			Occlusion problems
	Mature technology			Lines of sight required
	Flexible placement of markers			3dof natively – positional only, additional triangulated sensors required for 6dof
	Flexibility in using props			Can be expensive (active usually cheaper)
				Markers need to be reapplied each session
				Active units may be bulky

Optical systems currently on the market: (follow links for more info)

Passive Systems

Vicon MX+

Motion capture system using surface mount LEDs on camera strobes and manufactured entirely with lead-free components.

X-IST - FaceTracker

Innovative facial capture system.

Vicon is the market leader in professional passive optical motion capture with their MX+ product.

Active Systems

3rdTech HiBall 3100

Wide-area, high-precision tracker and 3D digitiser.

Ascension ReActor 2

Active optical untethered motion tracking.

Ascension Reactor2 offers a large scale environment that eliminates occlusion.

If you have any questions about optical systems then please call +44 (0)20 7613 5004 or email inition@inition.co.uk. We have a wide range available to view in our central London demo suite. Please contact us to arrange an appointment.