Electro Scientific Industries Inc. | Date: 2016-08-10
Employing laser scanning directions (20) that are oblique to and against a predominant gas flow direction (25) equalize the quality and waviness characteristics of orthogonal scribe lines (26) made by the laser scans. Positioning and sequence of multiple scan passes to form a feature wider than the width of a scribe line (26) can be controlled to enhance quality and waviness characteristics of the edges of the feature.
Electro Scientific Industries Inc. | Date: 2015-02-24
Each data point within a two-dimensional code can be represented by a distribution of spots. Each spot can be made small enough to be invisible to the human eye so that the two-dimensional code can be invisible on or within transparent or nontransparent materials. The spots can be spaced at a large distance to increase the signal-to-noise ratio for an optical code reader. A code reader can be adapted to read the spots and determine the data points.
Electro Scientific Industries Inc. | Date: 2015-04-02
The present invention relates to laser marking articles. In particular it relates to laser marking articles by laser ablating a coating applied to the article which reveals the surface of the article underneath, thereby forming the mark by the contrasting appearance between the revealed surface of the article and the adjacent remaining coating. Laser parameters are selected to provide uniform, commercially desirable appearance and avoid damage to the underlying surface while maintaining acceptable system throughput. In particular the laser pulse envelope is tailored to provide desirable appearance while maintaining acceptable system throughput.
Electro Scientific Industries Inc. | Date: 2016-04-04
A sampling apparatus (100) employs a cell-positioning system to move a sample capture cell (138) relative to a specimen positioning system (124). The cell-positioning system may be controlled to move sample capture cell (138) opposite to movement of the specimen positioning system (124) to maintain alignment of the sample capture cell (138) with an optical path of a laser beam of a sample generator (108). Alternatively or additionally, the cell-positioning system may be controlled to move sample capture cell (138) in response to alignment deviation of a reference beam on a quadrant detector (404).
Electro Scientific Industries Inc. | Date: 2016-06-14
Numerous embodiments concerning methods and apparatus for processing a workpiece are disclosed. In one embodiment, an electronic display device having a plurality of viewing elements is provided, wherein a viewing element includes a color element and at least one viewing element exhibits a bright pixel defect. The color element of the viewing element exhibiting the bright pixel defect can be darkened by irradiating the color element with at least one laser pulse having a pulse duration in a range from 1 ps to 40 ps.
Electro Scientific Industries Inc. | Date: 2016-02-26
A laser processing system includes a first positioning system (1044) for imparting first relative movement of a beam axis along a beam trajectory (1062) with respect to a workpiece (1060), a processor for determining a second relative movement of the beam axis (1061) along a plurality of dither rows, a second positioning system (1042) for imparting the second relative movement, and a laser source (1046) for emitting laser beam pulses. The laser beam pulses of individually selected energies can be directed to individually selected transverse spot locations (5310) one or more times during a primary laser pass to permit three-dimensional patterning. The laser beam pulses can also be directed to the spatially identical, overlapping, or non-overlapping neighboring spot area locations on the workpiece in a temporally nonsequential order.
Electro Scientific Industries Inc. and Center Technologique Optique Et Laser | Date: 2016-06-13
A method for forming features in a substrate includes irradiating a substrate with a beam of laser pulses, wherein the laser pulses have a wavelength selected such that the beam of laser pulses is transmitted into an interior of the substrate through a first surface of the substrate. The beam of laser pulses is focused to form a beam waist at or near a second surface of the substrate, wherein the second surface is spaced apart from the first surface along a z-axis direction, and the beam waist is translated in a spiral pattern extending from the second surface of the substrate toward the first surface of the substrate. The beam of laser pulses is characterized by a pulse repetition rate in a range from 20 kHz to 3 MHz, a pulse duration, a pulse overlap, and a z-axis translation speed.
Electro Scientific Industries Inc. | Date: 2016-06-21
One embodiment of the present invention can be characterized as a method for controlling a multi-axis machine tool that includes obtaining a preliminary rotary actuator command (wherein the rotary actuator command has frequency content exceeding a bandwidth of a rotary actuator), generating a processed rotary actuator command based, at least in part, on the preliminary rotary actuator command, the processed rotary actuator command having frequency content within a bandwidth of the rotary actuator and generating a first linear actuator command and a second linear actuator command based, at least in part, on the processed rotary actuator command. The processed rotary actuator command can be output to the rotary actuator, the first linear actuator command can be output to a first linear actuator and the second linear actuator command can be output to a second linear actuator.
Electro Scientific Industries Inc. | Date: 2015-12-08
Alignment features (60) associated with a support fixture (36) provide side scan data and top scan data reference points. Side scan displacement sensors (112) obtain side scan data of workpiece edge segments (23), and one or more cameras (130) obtain top scan data to provide a machining reference for the side scan data. The side scan data can be transformed into a top-view coordinate system usable by the laser machining system (140).
Electro Scientific Industries Inc. | Date: 2016-02-18
A laser system (112, 1300) modifies a large area on an article (100) by employing a beamlet generator (1404) to provide a plurality of beamlets (1408) to a beamlet selection device (2350) whose operation is synchronized with movement of a beam steering system (1370) to variably select a number and spatial arrangement of beamlets (1408) to propagate a variable pattern of spot areas (302) to the article (100).