Electro Scientific Industries, Inc.

Patrick Leonard

Jeffrey Howerton

Haibin Zhang

Glenn Simenson

David Barsic

Robert Hainsey

Wayne Crowther

Mehmet Emin Alpay

Frank G Evans

Mark Singer

David James McKeever

Victor Scarpine

The invention is a method and apparatus for creating a color and optical density selectable visible mark on an anodized aluminum specimen. The method includes providing a laser marking system having a laser, laser optics and a controller operatively connected to said laser to control laser pulse parameters and a controller with stored laser pulse parameters, selecting the stored laser pulse parameters associated with the desired color and optical density, directing the laser marking system to produce laser pulses having laser pulse parameters associated with the desired color and optical density including temporal pulse widths greater than about 1 and less than about 1000 picoseconds to impinge upon said anodized aluminum.

Method and apparatus for reliably laser marking articles

The invention is a method and apparatus for creating marks on an anodized aluminum specimen with selectable color and optical density. The method includes providing a laser marking system having a laser, laser optics and a controller operatively connected to said laser to control laser pulse parameters. The laser marking system is directed to produce laser pulses having laser pulse parameters associated with the desired color and optical density in the presence of a fluid directed to the surface of the anodized aluminum specimen while marking.

A laser micro-machining system includes a laser source positioned to direct a laser pulse through a scan lens to a work piece mounted on a work surface and a mirror positioned between the scan lens and the work piece and tilted with respect to the work surface to reflect the laser pulse toward the work piece. The mirror can be indexed to a number of positions so that only portions of the mirror are used for a number of processing steps, extending the life of the mirror.

Laser micro-machining system with post-scan lens deflection

The present invention is operative to determine the angular pose of an assumed object. A series of projection sums are calculated from a sample image of the known object where the known object has an assumed pose. The projection sums are calculated for a range of angles and organized into a two dimensional array coined a projection image. An image of the known object is provided where the known object has an unknown pose. A projection sum is calculated across the image of the known object with the unknown pose preferably at the perpendicular. This projection sum is correlated against the projection image and the angle corresponding to the best correlation is determined to be the angular pose of the known object.

Method and apparatus for determining angular pose of an object

The present invention provides for methods and an apparatus for evaluating objects having three dimensional features. One method involves using both two dimensional data sets to improve the processing of three dimensional data sets. The two dimensional data set can be used to pre-qualify the three dimensional data set, or may be used to locate that data within the three dimensional data set that is characteristic of the three dimensional feature. The invention may include a sensor configured to capture both three dimensional and two dimensional data. The present invention provides for an efficient technique to evaluate three dimensional data. The present invention also solves heretofore unrecognized problems associated with geometric distortion.

Method and apparatus for evaluating integrated circuit packages having three dimensional features

The present invention captures images of a circuit chip with a time delay integration or TDI sensor. The circuit chip is on a movable stage which moves at the same rate at which the TDI sensor clocks. A pulsed laser is directed toward the circuit chip and activated in synchronisation with the clock rate of the TDI sensor such that laser is activated when the TDI sensor is imaging the object and the laser is deactivated when the TDI sensor is transferring its charge.

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Ann Arbor, MI, United States of America

Patrick Leonard