Abstract:
The present disclosure is directed to a method of tool matching that employs an auto-learning feedback loop to update a library of key parameters. According to the method, measurements are performed on a control wafer to collect a set of parameters associated with the process/analysis tool that is being matched. When deviated parameters correlate to a correctable tool condition (i.e. a tool matching event), the parameters are added to the library of key parameters. These key or critical parameters may be monitored on a more frequent basis to identify deviations that have a strong likelihood of matching with a correctable tool condition. The tool matching methodology advantageously allows for monitoring of an automatically updated list of key parameters instead of needing to look at the full set of parameters collected from a control wafer each time. As such, tool matching can be performed on a more frequent basis.
Abstract:
Die Erfindung betrifft ein Verfahren (800) zum Bestimmen einer Sichtweite bei Nebel (106) am Tag, wobei das Verfahren (800) einen Schritt (802) des Einlesens und einen Schritt (804) des Ermittelns aufweist. Im Schritt (802) des Einlesens werden Koordinaten zumindest eines charakteristischen Punkts (110) einer Helligkeitskurve (102) eines Kamerabilds (100) des Nebels (106) eingelesen. Die Helligkeitskurve (102) repräsentiert Helligkeitswerte von Bildpunkten des Kamerabilds (100) entlang einer Bezugsachse (108) des Kamerabilds (100). Im Schritt (804) des Ermitteins wird eine meteorologische Sichtweite in dem Kamerabild (100) unter Verwendung der Koordinaten, einer meteorologischen Kontrastschwelle und einer Verarbeitungsvorschrift ermittelt, um die Sichtweite bei Nebel (106) zu schätzen. Die Verarbeitungsvorschrift bildet ein ortsabhängiges und/oder richtungsabhängiges Streulicht durch den Nebel (106) in dem Kamerabild (100) ab.
Abstract:
The present disclosure provides systems and methods for improving the resolution of a spectrometer configured to provide a frequency spectrum of a radiation incoming from a sample. The system comprises an optical medium configured so that the radiation incoming from the sample be transferred through the optical medium, the optical medium having a predetermined tunable spectral transmission curve; an operating unit connectable to the optical medium and configured to operate the optical medium so as to shift the spectral transmission curve of the optical medium over a predetermined spectral range; and a processing unit connectable to the spectrometer and configured to process a set of shifted frequency spectra provided by the spectrometer and obtainable by transferring the radiation incoming from the sample through the optical medium while shifting the spectral transmission curve of the optical medium so as to obtain a super resolved frequency spectrum of improved spectral resolution.
Abstract:
Verfahren und Vorrichtung zur optischen Überprüfung einer Probe mittels spektraler Interferometrie, wobei ein von einer Strahlungsquelle (1) abgegebener Strahl (2'') auf die Probe (5) sowie ein Referenzstrahl (2') auf eine Referenzprobe (4) gerichtet werden und die spektrale Interferenz der beiden Strahlen nach Reflexion an den Proben oder Passieren der Proben mittels eines Spektrographen (6) aufgenommen wird; das so erhaltene Interferogramm I (ω) wird numerisch nach der Kreisfrequenz ω abgeleitet, wonach für die so erhaltene Funktion I `(ω) die Nullstellen ω i numerisch als Lösungen der Gleichung I `(ω) = 0 berechnet werden und danach aus den Nullstellen ω i die frequenzabhängige Gruppenverzögerung τ (ω) entsprechend der Gleichung τ (ω n ) = π/ (ω i+1 -ω i ), mit i = 1,2... und ω n = (ω i+1 + ω i ) /2, berechnet wird.
Abstract:
An apparatus for the calibration and quality assurance of a multichannel spectrophotometer, particularly an ELISA spectrophotometer, comprises a series of filters having a known first color and linearly increasing optical density. The response of the spectrophotometer is measured against the known color and linearly increasing optical density. Additional filters of at least one additional color permit checking the color response of the spectrophotometer. An algorithm determines whether the response conforms to predetermined conditions. An output is produced to provide a record of the calibration and quality assurance of the spectrophotometer. The invention has particular utility for conducting calibration and quality assurance of ELISA spectrophotometers used in clinical laboratory screening for infection diseases, such as Hepatitis B and the AIDS viruses.
Abstract:
A concentration meter for use in measuring paper pulp consistency within the concentration range of 0.5 to 10%. The meter measures the depolarization of light passed through a pulp slurry and utilizes a pulsating infra-red light emitting diode (1) having a narrow beam in conjunction with a digital electronic circuit to provide a continuous concentration measurement. The instrument can be modified to form an in pipe probe to measure pulp concentration during the paper making process.