Cornell Research Foundation Inc.

Electro Scientific Industries, Inc.

Naval Research Laboratory

USA As Represented by Secretary of the Navy

Cornell University

Navel Research Laboratory

Robert B Reichenbach

Harold G Craighead

Maxim K Zalalutdinov

Jeevak M Parpia

Keith Aubin

Brian H Houston

Jeffrey Howerton

Mehmet Emin Alpay

Jeffrey A Albelo

Mark Alan Unrath

Hisashi Matsumoto

Jan Kleinert

Jeffrey W Baldwin

Michael John Darwin

Bojan (Rob) Ilic

Chuan Yang

Fang Shan

Andy Moore

Keith L Aubin

Jefferey Howerton

Maxim Zalalutidinov

The invention is a method and an apparatus for marking an article and the article thus marked. It includes providing the article. Generating a plurality of groups of laser pulses. At least one of the plurality of groups is generated by modulating a beam of laser pulses to form a plurality of beamlets. Each, of the plurality of beamlets, include at least one laser pulse. It also includes directing the plurality of groups of laser pulses onto the article such that laser pulses within the at least one of the plurality of groups impinge upon the article at spot areas that do not overlap one another, wherein laser pulses within the plurality of groups are configured to produce a visible mark on the article.

Method and apparatus for marking an article

The invention is a method and apparatus for laser marking a stainless steel specimen with commercially desirable marks. The method includes providing a laser processing system having a laser, and laser optics and a controller with pre-determined laser pulse parameters, selecting the pre-determined laser pulse parameters associated with the desired mark, and directing the laser marking system to produce laser pulses having laser pulse parameters associated with the desired marks including temporal pulse widths greater than about 1 and less than about 1000 picoseconds.

Method and apparatus for reliably laser marking articles

Laser output () is employed to mark an article () including a layer () supported by a substrate (), wherein the layer () has a thickness (t) that is less than or equal to 50 microns. The laser output () is focused to a numerical aperture diffraction-limited spot size () of less than or equal to 5 microns at a focal point () of the beam waist () and directed into the layer () to form a plurality of structures comprising a plurality of laser-induced cracks within the layer () and within a region of the article (), wherein the laser-induced cracks terminate within the layer () without extending to the substrate () or an outer surface () of the layer (), and wherein the plurality of structures are configured to scatter light incident upon the article ().

Laser systems and methods for internally marking thin layers, and articles produced thereby

Numerous embodiments of interactive control systems, methods of making the same, and devices incorporating the same are disclosed. In one embodiment, a system includes a light-resistant material; light-transmissive holes penetrating in a light-transmissive pattern through the light resistant material; and a lens disposed adjacent to the light-transmissive pattern.

Interactive control system, methods of making the same, and devices incorporating the same

Methods and systems for object identification and/or authentication.

Methods and systems for object identification and for authentication

The invention is a method and apparatus for laser marking a stainless steel specimen with commercially desirable marks. The method includes providing a laser processing system having a laser, laser optics and a controller with pre-determined laser pulse parameters, selecting the pre-determined laser pulse parameters associated with the desired mark, and directing the laser marking system to produce laser pulses having laser pulse parameters associated with the desired marks including temporal pulse widths greater than about 1 and less than about 1000 picoseconds.

Method and apparatus for optimally laser marking articles

A source signal is converted into a time-variant temperature field with transduction into mechanical motion. In one embodiment, the conversion of a source signal into the time-variant temperature field is provided by utilizing a micro-fabricated fast response, bolometer-type radio frequency power meter. A resonant-type micromechanical thermal actuator may be utilized for temperature read-out and demodulation.

Thermal-mechanical signal processing

An array of micromechanical oscillators have different resonant frequencies based on their geometries. In one embodiment, a micromechanical oscillator has a resonant frequency defined by an effective spring constant that is modified by application of heat. In one embodiment, the oscillator is disc of material supported by a pillar of much smaller diameter than the disc. The periphery of the disc is heated to modify the resonant frequency (or equivalently the spring constant or stiffness) of the disc. Continuous control of the output phase and frequency may be achieved when the oscillator becomes synchronized with an imposed sinusoidal force of close frequency. The oscillator frequency can be detuned to produce an easily controlled phase differential between the injected signal and the oscillator feedback. A phased array radar may be produced using independent phase controllable oscillators.

MEMS controlled oscillator

A micromechanical resonator is formed on a substrate. The resonator has a partial spherical shell clamped on an outside portion of the shell to the substrate. In other embodiments, a flat disc or other shape may be used. Movement is induced in a selected portion of the disc, inducing easily detectible out-of-plane motion. A laser is used in one embodiment to heat the selected portion of the disc and induce the motion. The motion may be detected by capacitive or interferometric techniques.

Shell type actuator

The temperature of a remote portion of device having a microelectromechanical oscillator is modulated to create oscillation of the oscillators. In one embodiment, a localized heat source is placed on a device layer of a multilayered stack, consisting of device, sacrificial and substrate layers. The localized heat source may be a laser beam in one embodiment. The oscillator is supported by the device layer and may be formed in the device layer in various embodiments. The oscillator may be spaced apart from the localized heat source.

Growing community of inventors

Ithaca, NY, United States of America

Robert B Reichenbach