Polaris Lyra^®

High-Performance Optical Navigation for Confined Spaces.

Accurate. Compact. Responsive.

Exceptional Measurement Accuracy and Reliability in a Compact Size

NDI’s compact optical tracker, the Polaris Lyra, is equipped with a small footprint, short stand-off, and a wide measurement volume, making it the ideal solution for applications focused on an individual body segment. Low data latency, a high measurement rate, and high accuracy add to the trusted reliability offered by the Polaris^® suite of products.

Exceptional Accuracy and Performance

The Polaris Lyra tracks 6D tool positions with sub-millimetre measurement accuracy and repeatability. OEM surgical tool movements are precisely tracked and localized, with a measurement rate up to 125 Hz.

Optimized Measurement Volume

The measurement volume is optimized for targeted tool tracking within localized areas. Polaris Lyra tool geometries are correspondingly reduced, which allows for lighter and more ergonomic OEM instruments that support very precise movements.

Compact Hardware Design

The Polaris Lyra features a compact form factor and weighs only 1.0 kg. The short stand-off allows the camera to be mounted very close to the application area. Its portable design is enhanced with a pre-calibrated measurement volume and quick system start-up.

Technical Specifications:

PERFORMANCE
Volumetric Accuracy RMS^1,2	0.20 mm Pyramid Volume 0.25 mm Extended Pyramid Volume
95% Confidence Interval	0.40 mm Pyramid Volume 0.50 mm Extended Pyramid Volume
Maximum Measurement Rate	Up to 125 Hz
Average Latency	125 Hz Config: <5 ms (typical) 60 Hz Config: <8 ms (typical)
Measurement Volumes	Pyramid Volume Extended Pyramid Volume
HARDWARE
Dimensions (L x W x H)	276 x 78 x 70 mm
Weight	0.8 kg +/- 0.05 kg
Mounting	¼” thread tripod mount or secured via three M3 x 0.5 mm pitch x 9.0 mm deep threaded holes, rear mount
TOOL TRACKING
Tool Types	Passive, Active Wireless, Active Wired
Maximum Number of Tools	Load up to 25 tools total – a mix of active wired, active wireless, and passive tools. Simultaneously track up to 6 passive tools, 6 active wireless tools, and 3 active wired tools.
Maximum Number of Markers per Tool	6 single-face/20 multi-face
DATA COMMUNICATION
Data Communication	Gigabit Ethernet
Communication Protocol	TCP, UDP
Data/Power Interface	Ethernet, RJ45 PoE+ (IEEE802.3 at Type 2)
Synchronization Interface	General Purpose Input/Output (GPIO) Hardware Port

¹ Based on a single marker stepped through more than 900 positions throughout the measurement volume using the mean of 30 samples at each position at 20°C
² Accuracy stated based on overall volume