MicronTracker provides best-in-class accuracy of 0.2mm. Its advanced drift compensation algorithm achieves this accuracy in a wide range of ambient conditions and maintains it for long periods. The standard package includes applications to perform accuracy assessment in the field and to improve accuracy.
MicronTracker features class-leading calibration accuracy of 0.2mm RMS. Its advanced drift compensation algorithms keep it accurate in a wide range of ambient conditions. Internal checks provide alerts in the rare instances when conditions may cause degradation in accuracy.
Superior pinpointing reliability
Competing pose trackers use bright infrared spots to mark target locations. In these systems, target centers are pinpointed by computing the intensity of the centroid of the image produced by the spot. A smudge or a partial occlusion can affect the position of the centroid, leading to significant measurement errors. This condition is not detected and the user is not alerted.
MicronTracker computes target locations at the intersection of 4 high-contrast regions, called an Xpoint. Each of the four black/white boundary lines independently serves to pinpoint the location of the target. Portions of the Xpoint region hidden by smudges or occlusions are disregarded and have no effect on accuracy.
Validate and refine accuracy in the field
The MicronTracker camera is designed to solidly preserve the highly accurate optical calibration performed at the factory. As with all high-precision opto-mechanical instruments, its accuracy may degrade in the field as a result of minute changes caused by environmental stresses or rough handling.
Otherposition trackers on the market require customers to purchase expensive equipment to verify accuracy over time. When accuracy is found to fall short of specifications, the camera must be sent back to the factory for repair or recalibration. MicronTracker’s R-Fine kit (custom-made accuracy bar and software) allows users to verify and immediately restore the accuracy of the device. R-Fine is provided free of charge in every MicronTracker kit.
The R-Fine software contains a model of typical physical changes occurring in the mechanical structure of the camera. During the calibration procedure the model is adjusted to best match the data collected. The adjusted model is then used to refine the calibration of the camera.Because the R-Fine calibration procedure takes only a few minutes, it is possible to validate the accuracy of performance as often as necessary.
Unique visual calibration verification
The spatial relationship between markers and any object location (such as a tool tip) can be visually presented to the user to enable dynamic visual comparison. For example, after calibrating the relationship between a tool marker and the position and orientation of the tooltip, measurement of the tooltip pose can be overlaid on itsexpected image location, allowing the user to easily detect errors and inaccuracies.
High dynamic range mode
High dynamic range (HDR) mode is a technique that allows solid detection in situations of great illumination range. This feature enables MicronTracker to work reliably under a wide range of intensity levels found in operating rooms. For example the H3-60 model covers a 5-400,000Lux range.