Side Viewing Interferometric Probe Alignment for near Vertical Steel Sidewalls
Aligning side-viewing optical probes on vertical steel sidewalls requires tip-tilt control within 0.05 degrees to preserve coherence fringe visibility.
Sub Micron Stage Tracking
Meaning
High precision position monitoring of a motion platform with a resolution below one micrometer. In the manufacturing of micro fluidic devices or semiconductor packaging, sub micron stage tracking ensures that the dispensing of resin or the placement of inserts is perfectly repeatable. This level of control is necessary for features that are smaller than a human hair.
Positional Accuracy
Linear motors and encoders work together to maintain the exact coordinates of the workpiece. Using sub micron stage tracking allows the machine to return to the same spot within a fraction of a micron every time. This eliminates the drift that causes misalignment in multi step processes.
Feedback Loop
Dynamic errors from heat or friction can degrade the performance of a mechanical slide. Systems equipped with sub micron stage tracking utilize laser interferometers to provide constant updates to the controller. These updates allow the drive system to correct for minuscule deviations caused by the weight of the part.
Minimal corrections ensure that the tool path remains true to the digital file throughout the entire cycle. High resolution glass scales provide the primary reference for the movement. Air bearings often support the stage to remove the friction of metal contact.
Assembly Integrity
Small components must fit together with tight tolerances to prevent leaks or mechanical failure. Sub micron stage tracking guarantees that the alignment of mating parts is consistent across thousands of cycles.