Abstract:
The present invention is directed towards a channel power monitor for monitoring channel power levels for each of N signal channels. The value of each channel power level is designated as p(nulli), where nulll is a channel parameter that characterizes each channel. An embodiment of the invention includes a variable channel attenuator having M attenuation profiles where MnullN, and where a k-th attenuation profile is characterized as a function of the channel parameter nulll by Ak(nulll). This embodiment also includes a detector for measuring a k-th integrated attenuated power level, the value of which is represented by Pk. An analysis unit receives all of the values Pk of the integrated attenuated power levels and thereupon derives the values p(nulll) of the channel power levels by solving a set of linear equations.
Abstract:
A system to generate multiple beam lines in an oblique angle multi-beam spot scanning wafer inspection system includes a beam scanning device configured to scan a beam of illumination, an objective lens oriented at an oblique angle relative to the surface of a sample and with an optical axis perpendicular to a first scanning direction on the sample, and one or more optical elements positioned between the objective lens and the beam scanning device. The one or more optical elements split the beam into two or more offset beams such that the two or more offset beams are separated in a least a second direction perpendicular to the first direction. The one or more optical elements further modify the phase characteristics of the two or more offset beams such that the two or more offset beams are simultaneously in focus on the sample during a scan.
Abstract:
A clinical diagnostic assay is performed on an optical bio disc and is read with a disc drive. More specifically this invention relates to capture layer assemblies for cellular assays using optical bio-discs. The current invention includes methods for determining the quality and quantity of a specific type of cell in a biological sample. These methods includes binding capture agents to a capture zone on the disc, providing a sample to the capture zone, remove portions of the sample that are not bound in the capture zone, and counting bound cells. The current invention also includes methods and apparatus for performing a cluster designation marker assay using an optical disc and disc drive and method for making optical analysis discs for performing such cluster designation assays.
Abstract:
Angle-resolved reflectometers and reflectometry methods are provided, which comprise a coherent light source, an optical system arranged to scan a target pattern using a spot of coherent light from the light source to yield realizations of the light distribution in the collected pupil, wherein the spot covers a part of the target pattern and the scanning is carried out optically or mechanically according to a scanning pattern; and a processing unit arranged to generate a composite image of the collected pupil distribution by combining the pupil images. Metrology systems and methods are provided, which reduce diffraction errors by estimating, quantitatively, a functional dependency of measurement parameters on aperture sizes and deriving, from identified diffraction components of the functional dependency which relate to the aperture sizes, correction terms for the measurement parameters with respect to the measurement conditions.
Abstract:
The present invention suggests a vision inspection system and a workpiece inspection method used in inspecting various kinds of workpiece. The vision inspection system includes a level block, a first transfer device, a camera, a second transfer device and a computer. The first transfer device is installed on an upper surface of the level block, has a table for supporting the workpiece, and rectilinearly moves the table between a first position and a second position. The camera is arranged above the level block for taking an image of the workpiece to output image data. The second transfer device is installed on the upper surface of the level block for rectilinearly moving the camera between the first position and the second position. The computer controls the first transfer device to move the table from the first position to the second position and the second transfer device to move the camera from the second position to the first position.
Abstract:
A method for detecting an imperfection in a blister package having at least one radiation-transmissible layer (32), optionally moving, the blister package having a flat side and a pocket side, the method comprising the steps of directing radiation (18, 18’) at the flat side and/or the pocket side of the blister package and detecting any radiation (22) emitted from at least one edge of the blister package.
Abstract:
A method for three-dimensional (3D) image calibration for a spectral domain optical coherence tomography (OCT) system, the OCT system including a scanning arrangement for laterally scanning a sample light beam across a surface of a sample, an optical detection system for detecting light reflected back from the sample to obtain an optical image of the sample, and a reference light beam, the OCT system generating axially resolved optical information from the sample as the sample light beam is scanned laterally across the sample using optical path length differences (OPLD) between the reference light beam and the sample light beam, the method including: providing a calibration sample having a substrate having laterally arranged structural elements providing optical contrast, the structural elements having at least one of known dimensions or known position values on the substrate; scanning, using a first set of scanner parameters for the scanning arrangement, the sample light beam.