Electro Scientific Industries, Inc.

Digimarc Corporation

Other

Kurt M Eaton

James Brookhyser

Jan Kleinert

Tony F Rodriguez

Ho Wai Lo

Mehmet Emin Alpay

Qian Xu

Zhibin Lin

Mike Tyler

Guang Lu

Geoffrey B Rhoads

Ravi K Sharma

John Douglas Lord

Yang Bai

Brian T MacIntosh

Scott M Long

Eliot Rogers

Shankar Thagadur Shivappa

Ajith Mulki Kamath

Guangyu Li

Brandon Bilyeu

Yuan Liu

Honghua Hu

Jim Brookhyser

Kimberly Eaton

Jered Richter

A beam positioner can be broadly characterized as including a first acousto-optic (AO) deflector (AOD) operative to diffract an incident beam of linearly polarized laser light, wherein the first AOD has a first diffraction axis and wherein the first AOD is oriented such that the first diffraction axis has a predetermined spatial relationship with the plane of polarization of the linearly polarized laser light. The beam positioner can include at least one phase-shifting reflector arranged within a beam path along which light is propagatable from the first AOD. The at least one phase-shifting reflector can be configured and oriented to rotate the plane of polarization of light diffracted by the first AOD.

Acousto-optic system having phase-shifting reflector

A beam positioner includes a first acousto-optic (AO) deflector (AOD) comprising an AO cell and a transducer attached to the AO cell, and a wave plate optically contacted to the first AOD.

Optically contacted acousto-optic device and method of making the same

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.

Multi-axis machine tool and methods of controlling the same

Disclosed is a method and an apparatus to process a workpiece including producing a first beam of laser energy characterized by a first spatial intensity distribution. A first workpiece is processed using the first beam of laser energy to form a plurality of features at a first distance between the scan lens and the first workpiece and forming a second features at a second distance. The method includes determining which of the plurality of features has a shape that most closely resembles the shape of the first spatial intensity distribution and setting a process distance as the distance that produced that feature. Using this process distance, a surface of a second workpiece is processed using second beam of laser energy with a second spatial intensity distribution.

Location of image plane in a laser processing system

Arrangements are detailed to process imagery of an object, captured by a camera, based on contextual data that at least partially characterizes a condition of the object when the imagery was captured. Contextual data can be obtained directly by a sensor or can be derived by pre-processing the captured imagery. The captured imagery can be processed to detect features such as digital watermarks, fingerprints, barcodes, etc. A great number of other features and arrangements are also detailed.

Methods and systems for contextually processing imagery

Methods and arrangements involving portable user devices such smartphones and wearable electronic devices are disclosed, as well as other devices and sensors distributed within an ambient environment. Some arrangements enable a user to perform an object recognition process in a computationally- and time-efficient manner. Other arrangements enable users and other entities to, either individually or cooperatively, register or enroll physical objects into one or more object registries on which an object recognition process can be performed. Still other arrangements enable users and other entities to, either individually or cooperatively, associate registered or enrolled objects with one or more items of metadata. A great variety of other features and arrangements are also detailed.

Methods for object recognition and related arrangements

Systems and methods for enabling automated motion control of a tool in a multi-axis machine tool

The present disclosure relates generally to signal processing techniques for content signals such as audio, images and video signals. More particularly, the present disclosure relates to processing content signals to facilitate recognition of ambient content signals using digital watermarks and/or digital fingerprints.

Methods and apparatus for facilitating ambient content recognition using digital watermarks, and related arrangements

A graphene-based device can be characterized as including a first electrode comprising graphene, a second electrode comprising graphene, and a potential barrier. The first electrode is physically separated from the second electrode by the potential barrier. The first electrode, second electrode and potential barrier are configured such that the graphene-based device can exhibit non-linear I-V characteristics under application of a voltage bias between the first electrode and the second electrode.

Graphene-based device and methods of forming the same

Growing community of inventors

West Linn, OR, United States of America

Kurt M Eaton