DEFECT DETECTION USING COHERENT LIGHT ILLUMINATION AND ARTIFICIAL NEURAL NETWORK ANALYSIS OF SPECKLE PATTERNS
Granted: October 17, 2019
Application Number:
20190318469
A system and method for detecting defects in an object includes illuminating the object with a coherent light, recording the a speckle pattern of the coherent light reflected and/or scattered and/or transmitted from the object, and analyzing the speckle pattern using a trained artificial neural network to determine whether defects are present in the object and the types of defects. To train the neural network, sample objects having known types of defects or no defects are illuminated…
METHOD, DEVICE AND INSTALLATION FOR COMPOSING A VIDEO SIGNAL
Granted: July 5, 2018
Application Number:
20180191964
Method for composing an output video signal (So) from input video signals (Si1, Si2, Si3 . . . Sim), which include input frame sequences (Si1[n], Si2[n], Si3[n] . . . Sim[n]) with a number of pixels for each input frame associated with an input resolution (Ri1, Ri2, Ri3 . . . Rim). The method includes determining a spatial surface on a three-dimensional virtual space associated with each pixel; establishing a visualization point (X0,Y0,Z0) and a visualization window in the…
MULTI-WAVELENGTH SOURCE OF FEMTOSECOND INFRARED PULSES
Granted: October 6, 2016
Application Number:
20160294145
A source of femtosecond pulses at center wavelengths of about 940 nm and about 1140 nanometers (nm) includes a mode-locked fiber MOPA delivering pulses having a center wavelength of about 1040 nm. The 1040-nanometer pulses are spectrally spread into a continuum spectrum extending in range between about 900 nm and about 1200 nm and having well defined side-lobes around the 940-nm and 1140-wavelengths. Radiation is spatially selected from these side-lobes and delivered as the 940-nm and…
MOPA WITH EXTERNALLY TRIGGERED PASSIVELY Q-SWITCHED LASER
Granted: September 22, 2016
Application Number:
20160276801
In a master oscillator plus power amplifier (MOPA) system, the oscillator is a passively Q-switched laser. The laser is triggered into passively Q-switched operation by operating an optical switch to resonantly couple back into the laser amplified stimulated emission generated by the amplifier.
CURRENT DRIVER FOR DIODE LASER SYSTEM
Granted: May 26, 2016
Application Number:
20160149376
An architecture for current driver circuitry for diode laser systems is contemplated whereby the circuitry is both modular and minimally complex with respect to the number of components and connections.
METHODS AND APPARATUS RELATED TO A SIDE-FIRE MEMBER HAVING A DOPED SILICA COMPONENT
Granted: February 25, 2016
Application Number:
20160054525
In one embodiment, an apparatus may Include an optical fiber that may have a surface non-normal to a longitudinal axis of a distal end portion of the optical fiber. The surface may define a portion of an interface configured to redirect electromagnetic radiation propagated from within the optical fiber and incident on the interface to a direction offset from the longitudinal axis. The apparatus may also include a doped silica cap that may be fused to the optical fiber such that the…
LIGHT-SOURCE INCLUDING A PLANAR ARRAY OF DIODE-LASER BARS
Granted: November 19, 2015
Application Number:
20150333483
A light-source includes a planar array of diode-laser bars and a plurality of turning-mirrors arranged to stack beams from the diode-laser bars in the fast-axis direction to provide a first combined beam. Six plane mirrors are arranged to divide the combined beam into three beam-slices, each having one-third the slow-axis width of the first combined beam, and add the beam-slices in the fast-axis direction to provide a second combined beam having about one-third the slow-axis width and…
MONITORING METHOD AND APPARATUS FOR CONTROL OF EXCIMER LASER ANNEALING
Granted: September 3, 2015
Application Number:
20150247808
A method is disclosed evaluating a silicon layer crystallized by irradiation with pulses form an excimer-laser. The crystallization produces periodic features on the crystalized layer dependent on the number of and energy density ED in the pulses to which the layer has been exposed. An area of the layer is illuminated with light. A microscope image of the illuminated area is made from light diffracted from the illuminated are by the periodic features. The microscope image includes…
FARADAY ROTATOR FOR AN OPTICAL ISOLATOR
Granted: July 16, 2015
Application Number:
20150198823
A Faraday rotator includes two magnet sub-assemblies assemblies spaced apart and aligned with each other with a gap therebetween. Each magnet sub-assembly includes a central magnet magnetized in direction parallel to the gap. The central magnet is sandwiched between two end magnets magnetized in a direction perpendicular to the gap. A magneto-optic crystal is located in the gap between the central magnets.
TUNABLE FEMTOSECOND LASER-PULSE SOURCE INCLUDING A SUPER-CONTINUUM GENERATOR
Granted: May 14, 2015
Application Number:
20150131143
A mode-locked fiber MOPA delivers pulses of laser-radiation. A super-continuum generator including a bulk spectral-broadening element and a negative group-delay dispersion (NGDD) device is arranged to receive a pulse from the MOPA and cause the pulse to make a predetermined number of sequential interactions with the broadening element and the NGDD device. After making the predetermined interactions, the pulse is delivered from the super-continuum generator with a very broad…
BEAM-STACKING ELEMENT FOR DIODE-LASER BAR STACK
Granted: March 26, 2015
Application Number:
20150085370
Optical apparatus includes a diode-laser bar stack having N fast-axis stacked diode-laser bars cooperative with a parallel sided transparent stacking plate. The stacking plate receives N original beams from the N diode-laser bars and converts the N beams to 2N fast-axis stacked beams having one-half of a width the original beams and one-half of a fast-axis spacing between the original beams.
VIA-HOLE DRILLING IN A PRINTED CIRCUIT BOARD USING A CARBON MONOXIDE LASER
Granted: March 26, 2015
Application Number:
20150083698
Apparatus for drilling a via-hole in a printed circuit board (PCB) includes a carbon monoxide laser deliver laser radiation pulses. The pulses have a relatively broad wavelength-range, and slow rising and falling edges. The rising and falling edges of the pulses are clipped using and acousto-optic modulator. A dispersion-compensator compensates for dispersion in the clipped pulses introduced by the AOM. Achromatic focusing optics focus the dispersion-compensated, clipped pulses on the…
MULTI-STAGE MOPA WITH FIRST-PULSE SUPPRESSION
Granted: March 12, 2015
Application Number:
20150070753
A solid-state MOPA includes a mode-locked laser delivering a train of pulses. The pulses are input to a fast E-O shutter, including polarization-rotating elements, polarizing beam-splitters, and a Pockels cell that can be driven alternatively by high voltage (HV) pulses of fixed long and short durations. A multi-pass amplifier follows the E-O shutter. The E-O shutter selects every Nth pulse from the input train and delivers the selected pulses to the multi-pass amplifier. The multi-pass…
SYSTEM AND METHOD FOR CONTINUOUS CARRIER WAVE RECONSTRUCTION
Granted: February 12, 2015
Application Number:
20150042511
A system and method of continuous carrier wave reconstruction includes a radio navigation receiver that includes one or more processors, memory coupled to the one or more processors, and an input for receiving a signal from a transmitter. The signal has a phase. The one or more processors are configured to obtain phase lock on the received signal, extract first phase information from the received signal, detect a loss in phase lock on the received signal, and extrapolate second phase…
LASER-SCRIBING OF CHEMICALLY STRENGTHENED GLASS
Granted: December 4, 2014
Application Number:
20140352358
A method is disclosed for scribing a contained crack or vent in a chemically strengthened glass sheet. The glass has shallow surface regions under compressive stress, bounding a central region under tensile stress. The vent is formed by rapidly bulk-heating the glass, using radiation from a carbon monoxide laser, to a depth just below a surface compressive region and extending marginally into the tensile stress region then rapidly cooling the heated region with a water mist spray. The…
MEMORY-NETWORK PROCESSOR WITH PROGRAMMABLE OPTIMIZATIONS
Granted: November 27, 2014
Application Number:
20140351551
Various embodiments are disclosed of a multiprocessor system with processing elements optimized for high performance and low power dissipation and an associated method of programming the processing elements. Each processing element may comprise a fetch unit and a plurality of address generator units and a plurality of pipelined datapaths. The fetch unit may be configured to receive a multi-part instruction, wherein the multi-part instruction includes a plurality of fields. A first…
DYNAMIC RECONFIGURATION OF APPLICATIONS ON A MULTI-PROCESSOR EMBEDDED SYSTEM
Granted: November 20, 2014
Application Number:
20140344527
A multiprocessor system and method for swapping applications executing on the multiprocessor system are disclosed. The plurality of applications may include a first application and a plurality of other applications. The first application may be dynamically swapped with a second application. The swapping may be performed without stopping the plurality of other applications. The plurality of other applications may continue to execute during the swapping to perform a real-time operation and…
BEAM-COMBINER FOR FIBER-DELIVERED LASER-BEAMS OF DIFFERENT WAVELENGTHS
Granted: November 20, 2014
Application Number:
20140340761
A beam combiner for combining laser-beams of different colors along a common path includes a directing-prism for each of the laser-beams and one combining-prism. The directing-prisms are arranged to transmit the laser-beams to the combining-prism. The directing-prisms and the combining-prism are configured and arranged with respect to each other such that the directing-prism transmits the beams along the common path.
LASER LABEL-PRINTER
Granted: November 20, 2014
Application Number:
20140340464
A laser label printer for use with a laser markable medium includes a laser-diode fiber-coupled to an optical train, which includes a focusing lens for focusing the radiation on the medium. The focusing lens is traversed across the medium, with incremental motion of the medium between traverses, for line by line printing of the label. The printer includes a feature for protecting the focusing lens from contamination, and self-diagnostic and adjustment features.
MICROCRYSTAL LASER FOR GENERATING LASER PULSES
Granted: October 9, 2014
Application Number:
20140301422
A microcrystal laser for generating laser pulses has a laser resonator which has a laser medium arranged between two mirrors; and an arrangement for stabilizing the optical path length is provided. The laser resonator has a saturable absorber medium for pulse generation.
