Patents Examined by Vincent P. Barth
-
Patent number: 6646736Abstract: Equipment for detecting impurities in transparent material comprising a light source to illuminate the material, a camera to detect light transmitted through the material and signal-processing apparatus for processing and analysing signals from the camera representing the light transmission through the material. This type of equipment is calibrated by dark areas being displayed on a film of transparent material (22, 24, 26) and the actual sizes (30) of the areas being determined. The sizes of the dark areas are then determined using the detecting equipment (34) and in this way determined sizes are compared with actual sizes (36) for calibration of the detecting equipment (38).Type: GrantFiled: October 12, 2001Date of Patent: November 11, 2003Assignee: Semyre Photonic Systems ABInventor: Göran Åsemyr
-
Patent number: 6639684Abstract: A method and apparatus to digitize three-dimensional objects. A projection assembly is retained in fixed relation to an imaging assembly. The projection assembly projects a fixed gradient light pattern into a focal zone of the imaging assembly. The imaging assembly integrates the illumination over time such that the fixed gradient reveals the features of the three dimensional object.Type: GrantFiled: September 13, 2000Date of Patent: October 28, 2003Assignee: NextEngine, Inc.Inventors: Mark S. Knighton, David S. Agabra, William D. McKinley, John Z. Zheng, David D. Drobnis, J. Douglas Logan, Basel F. Bahhour, Jill E. Haynie, Kevin H. Vuong, Amit Tandon, Kent E. Sidney, Peter L. Diaconescu
-
Patent number: 6636315Abstract: The quality of distribution of pigments in a matrix is estimated by measuring the reflectivity of a sample of the pigmented matrix at a shorter and a longer wavelength, and calculating a function of the two measurements. A ratio of the normalized reflectivity for broad short and long wavelength bands is the preferred function.Type: GrantFiled: August 17, 2001Date of Patent: October 21, 2003Assignee: Kronos InternationalInventor: Josef Schmelzer
-
Patent number: 6636320Abstract: Flow separation detectors and, more particularly feedback sensor arrangements consisting of optical fiber tufts adapted to provide for the measurement of surface aerodynamic flow phenomena through the effects birefringence or transmitted light, and especially with regard to aerodynamic flow separation which is encountered over a surface. Also facilitated is the detection of aerodynamic flow separation with a concurrent detection of encountered mechanical strain and stresses on the surface structure being monitored.Type: GrantFiled: October 18, 2000Date of Patent: October 21, 2003Assignee: Lockheed Martin CorporationInventors: Todd G. Wetzel, Edward R. Furlong
-
Patent number: 6621571Abstract: In a method and apparatus for detecting pattern defects, a UV laser is focused on a pupil of an objective lens and scanned; the focused and scanned UV lens illuminates a specimen on which patterns are formed; the specimen illuminated by the UV laser is imaged: and the resulting image of the specimen is compared with a previously stored reference image. The specimen illuminated by UV light is imaged using an anti-blooming time delay integration image sensor or a back-illumination time delay integration image sensor; and the resulting specimen image is compared with a previously stored reference image.Type: GrantFiled: October 30, 2000Date of Patent: September 16, 2003Assignee: Hitachi, Ltd.Inventors: Shunji Maeda, Atsushi Yoshida, Yukihiro Shibata, Toshihiko Nakata, Hiroaki Shishido, Minoru Yoshida, Sachio Uto
-
Patent number: 6621566Abstract: An automated optical inspection (AOI) system includes component learning integrated with the inspection of a circuit board. The AOI system includes a component learning area that can be viewed by an imaging system used to inspect the circuit board in an inspection area. The component learning area can correspond to a region proximate the inspection area. The automated optical inspection system receives board inspection and component learn requests and determines opportune times to learn new component characteristics during the board inspection process so as to minimize the impact of the learning process on the overall inspection efficiency.Type: GrantFiled: October 2, 2000Date of Patent: September 16, 2003Assignee: Teradyne, Inc.Inventors: Eric Aldrich, Richard Pye, Lyle Sherwood, Douglas W. Raymond, John Burnett
-
Patent number: 6618156Abstract: Light is transmitted through a compressing clamp which clamps the liquid crystal display panel 10, and the spectrum of light is obtained by a spectrometer 141. A cell thickness is detected based on a wavelength or a frequency at which the spectrum has the minimum or maximum value. The obtained cell thickness is compared with a desired value, and a pressure control unit 132 supplies the compressing clamp with a fluid in accordance with the result of the comparison.Type: GrantFiled: August 30, 2001Date of Patent: September 9, 2003Assignee: Seiko Epson CorporationInventor: Masahiro Kuroiwa
-
Patent number: 6618155Abstract: Disclosed herein are TV Camera based and other electro-optical sensors and systems, providing affordable methods and apparatus for high speed determination of dimensions and other features of objects. Particular embodiments capable of fast and reliable acquisition of features of moving objects such as boards and wood products are disclosed. Preferred embodiments utilize laser triangulation range detection with at least two cameras viewing the same laser spot or line projected on the object.Type: GrantFiled: August 17, 2001Date of Patent: September 9, 2003Assignee: LMI Technologies Inc.Inventors: Leonard Metcalfe, Barry Dashner
-
Patent number: 6614519Abstract: An inspection system using laser light directed at an off-axis parabolic mirror which focuses the beam on the surface being inspected and also serves as the collector for scattered and specular light returned from the surface is described. Specular and scattered light returned from the surface onto the parabolic mirror is divided into appropriate fields and directed onto detectors. In the preferred embodiment a polarized laser is used in conjunction with a polarizing beam splitter and a quarter-wave plate to route the reflected beam to a detector while allowing the original beam to be directed through the same optics. The parabolic mirror and selected additional components may be commonly mounted on a translatable stage which is moved along a radius of the disk when the optical inspection is being performed. Other components of the system such as the laser can remain in a fixed position.Type: GrantFiled: October 25, 2000Date of Patent: September 2, 2003Assignee: International Business Machines CorporationInventors: Milton Russell Latta, Wai Cheung Leung, Bob C. Robinson, Timothy Carl Strand, Andrew Ching Tam
-
Patent number: 6611320Abstract: The present invention relates to a method for detecting blood characteristics including hemoglobin in a fluid medium using both transmission and reflection of a light beam which forms a quotient.Type: GrantFiled: September 7, 2000Date of Patent: August 26, 2003Assignee: OptoQ ABInventors: Lars-Göran Lindberg, Gunnar Enlund, Magnus Vegfors
-
Patent number: 6611324Abstract: A method for determining the susceptibility of solar cell coverglass assemblies to degrade wherein the solar cell assembly contains coated or uncoated coverglass, the method comprises exposing the solar cell coverglass assembly with a pulsing laser having an energy per unit area per pulse which distinguishes by laser damage between coverglass assemblies that have an anomalously high propensity to darken under solar exposure and those that only have a normal, nominal propensity to darken; and, characterizing the propensity of the coverglass assemblies to darken. The process results in an improvement of the long-term power output of solar cells by maintaining optical transparency and reducing temperature increases arising from increased solar absorption in darkened coverglass assemblies.Type: GrantFiled: July 28, 2000Date of Patent: August 26, 2003Assignee: TRW Inc.Inventors: James T. Hall, H. Donald Wolpert
-
Patent number: 6606147Abstract: The elaborately calculated method of the present invention using photoelastic analysis for finding contact relation between ball and track is characterized in that a photoelastic plate having a semi-circular section is used in measurement by observing contrast of stripes appeared thereon in stead of observing track profile from the plucked image of the object in conventional technique therefore being released from shortcoming of inaccurate measurement result due to vagueness of profile of plucked image.Type: GrantFiled: September 10, 2001Date of Patent: August 12, 2003Assignee: Hiwin Technologies Corp.Inventors: Yuen-Ling Chiu, Yuan-Fang Chen
-
Patent number: 6600566Abstract: The present invention provides a rough surface scattering method and solver for efficiently computing electromagnetic scattered fields resulting from an incident wave (12) being reflected from a surface slowly varying on the scale of the wavelength (10). The wavelength claimed approach to high-frequency scattering is based on the use of expansions of high order in parameter &lgr;, wavelength of the incident radiation. The resulting high-order expansion approach expands substantially on the range of applicability over low order methods, and can be used in some of the most challenging cases arising in applications. The surface current (14) induced by the incident wave (12) is represented as a high-order high-frequency expansion (20). The surface current ansatz is substituted into the surface current integral equation (22), wherein a surface current series expansion is formed (24) having, a high frequency order.Type: GrantFiled: September 29, 2000Date of Patent: July 29, 2003Assignee: Northrop Grumman CorporationInventors: Maria Z. Caponi, Alain Sei, Oscar P. Bruno
-
Patent number: 6597438Abstract: A portable or wearable cytometer that can be used at remote locations, such as in the field or at home. The flow cytometer of the present invention may help improve the healthcare of many weak, sick or elderly people by providing early detection of infection. By detecting the infection early, the infection may be more readily treatable. In military applications, the portable cytometer of the present invention may help save lives by providing early detection of infection due to biological agents.Type: GrantFiled: August 2, 2000Date of Patent: July 22, 2003Assignee: Honeywell International Inc.Inventors: Cleopatra Cabuz, J. David Zook, James Allen Cox, Thomas Raymond Ohnstein, Ulrich Bonne, Eugen Loan Cabuz, Ernest Allen Satren, Aravind Padmanabhan, Teresa M. Marta
-
Patent number: 6597448Abstract: A system and method of inspecting a foreign particle or a defect on a sample are provided. Such a method comprises irradiating light to an object to be inspected; detecting reflected light or scattered light from the object to be inspected irradiated with the light; detecting a signal of the foreign particle or the defect from the detected signal; providing information related to a size of the foreign particle or the defect from the signal of the detected foreign particle or the defect; and outputting information on a display screen a distribution of the size of the foreign particle or defect with information indicating a cause of the distribution of the foreign particle or defect.Type: GrantFiled: August 23, 2000Date of Patent: July 22, 2003Assignees: Hitachi, Ltd., Hitachi Electronics Engineering Co., Ltd.Inventors: Hidetoshi Nishiyama, Minori Noguchi, Yoshimasa Ohshima, Tetsuya Watanabe, Hisato Nakamura, Takahiro Jingu, Yuko Inoue, Keiichi Saiki, Kenji Watanabe
-
Patent number: 6594016Abstract: The invention relates to a method of spectroscopically determining the concentration of a volatile organic compound in a gas given off by a mammal. According to the invention, the spectroscopic technique applied is photoacoustic spectroscopy and the strength of the acoustic effect is determined by means of a microphone, as being the measure of the concentration of the organic compound.Type: GrantFiled: September 5, 2000Date of Patent: July 15, 2003Assignee: Stichting voor de Technische WetenschappenInventors: Sacco Te Lintel Hekkert, Franciscus Johannes Maria Harren, David Hubert Parker
-
Patent number: 6594017Abstract: The invention relates to a device and a method for moving a measuring sensor (2) into and out of a pressurized or flow-through conduit (1) or a pressurized or flow-through vessel. The device according to the invention comprises, in this case, a holding element (3) for holding the measuring sensor (2), a guiding element (4) for guiding the holding element (3) and a volume element (5). The holding element (3) can be moved in such a way that the measuring sensor (2) held by the holding element comes to rest in a position completely in the volume element (5). In this position, the measuring sensor (2) can be removed from the holding element (3). With the aid of the device according to the invention and the method according to the invention, it is possible, in particular, to measure the cleanliness of a conduit system blown out with a fluid, without the blow-out operation being interrupted.Type: GrantFiled: September 28, 2000Date of Patent: July 15, 2003Assignee: AlstomInventor: Joachim Menden
-
Patent number: 6590662Abstract: An object sensor and object sensing method that sense the status of the sensing surface by detecting a dynamic impact of a rain drop, not by comparing the signal with a reference value. An object sensor sensing the status of a sensing surface by detecting a light with a photo detector, which light has been emitted by a photo emission element and reflected on the sensing surface, comprises: a means for generating a time lag signal from the output signal of the photo detector; a means for calculating a differential signal between the output signal of the photo detector and the time lag signal; and a means for judging the status of the sensing surface by detecting the generation of the differential signal.Type: GrantFiled: December 26, 2000Date of Patent: July 8, 2003Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Kazuto Kokuryo, Shinji Nagao
-
Patent number: 6570650Abstract: Disclosed are methods and apparatus for designing an optical spectrum of an illumination light beam within an optical inspection system. A set of conditions for inspecting a film on a sample by directing an illumination light beam at the sample is determined. At least a portion of the illumination light beam is reflected off the sample and used to generate an image of at least a portion of the film on the sample. A plurality of peak wavelength values are determined for the optical spectrum of the illumination light beam so as to control color variation in the image of the film portion. The determination of the peak wavelengths is based on the determined set of conditions and a selected thickness range of the film. In one specific embodiment, the color variation is reduced, while in another embodiment the color variation is increased to enhance pattern contrast. An apparatus which implements the designed optical spectrum is also disclosed.Type: GrantFiled: September 7, 2001Date of Patent: May 27, 2003Assignee: KLA-Tenor CorporationInventors: Yu Guan, Hong Fu, Steven R. Lange
-
Patent number: 6570651Abstract: The invention relates to a method of determining the optical quality of and detecting faults in flat glass (2) and other transparent materials, especially in float glass, wherein a video camera (1) is arranged to monitor an illuminating device (3) either through the glass (2) or by observing the reflection thereof, the focus being on the glass (2) and the sheet, respectively, and the video camera (1) generates signals in dependence on the quality of the glass (2) and these signals are evaluated, wherein use is made of at least one illuminating device (3), comprising a pattern (4) of adjacent partial portions (5a,5b) alternately different at least in color and/or in intensity, an observation spot of the video camera (1) picks up the pattern (4), two video signals U1,U2 are assigned to the signal of the pattern (4), and a change of the intensity of the video signals U1,U2 is used for evaluating the quality of the glass (2) and the sheet, respectively.Type: GrantFiled: September 25, 2000Date of Patent: May 27, 2003Assignee: Lasor AGInventors: Wolfgang Haubold, Josef Droste, Edmund Paneff