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| Number | Title | Issue Date |
| 6937350 | Apparatus and methods for optically monitoring thickness In one aspect, the invention relates to an apparatus for monitoring thickness variations of an object having first and second opposing surfaces. The apparatus includes a first source positioned to project a first fringe pattern at a first location on the first surfa... | 08/30/2005 |
| 6906809 | Surface shape measuring system A grating (3) is disposed to face the measurement target surface of a measurement target object (11). A light source (1) irradiates the grating (3) with illumination light. A camera (6) captures a moire fringe image formed on the g... | 06/14/2005 |
| 6873421 | Method and apparatus for measuring the three-dimensional shape of an object using a moire equipment An apparatus and method for measuring a three-dimensional shape of an object using a projection moiré device. The method comprises the steps of obtaining a grid pattern image projected on a reference plane of a moving table and applying a buckets algorithm thereto,... | 03/29/2005 |
| 6867871 | Moiré grating noise eliminating method A moving distance of a moiré grating in y direction is set with respect to a grating pitch of a moiré grating, whereas an imaging magnification of imaging means is set according to the relationship between the pixel pitch of an image pickup device in the imaging m... | 03/15/2005 |
| 6809803 | Surface topology inspection Apparatus and a method for inspecting a topology of a surface (2) of a structural member (1) are provided. The degree to which a known type of stress has been applied to the member may be ascertained using a Moiré grid (8). The method involves ... | 10/26/2004 |
| 6781704 | Automatic installation and process for taking measurements and acquiring shapes An automatic and autonomous installation for taking measurements and acquiring three-dimensional shapes of subjects, particularly in the form of a booth adapted for human subjects, includes units for projecting light fringes, for taking rapid views, and for controll... | 08/24/2004 |
| 6765684 | Surface shape measurement apparatus A surface shape measurement apparatus for measuring a shape of an object to be examined by a simple mechanism for rotating a reference grid. The apparatus comprises a stage on which the object is rested, a reference grid disposed in parallel to the stage, illuminati... | 07/20/2004 |
| 6763133 | Moire image capturing apparatus and method therefor The present invention relates a moiré image capturing apparatus and the related method, the apparatus comprising: an optical projection unit arranged in perpendicular to a reference surface with a light source for illuminating light to the reference surface, where ... | 07/13/2004 |
| 6731391 | Shadow moire surface measurement using Talbot effect A method and apparatus for surface measurement using the shadow moire effect with the Talbot effect. The apparatus includes a specimen mount to receive a specimen having a surface to be measured, and a reference grating mounted adjacent to the specimen mount so as t... | 05/04/2004 |
| 6717661 | Fourier moire wavefront sensor An apparatus and method for wavefront sensing that includes: employing two moiré gratings in an optical path; optically Fourier transforming a moiré deflectogram produced by the gratings; variably transmitting the transformed moiré deflectogram; and receiving an ... | 04/06/2004 |
| 6690474 | Apparatus and methods for surface contour measurement Apparatus and methods of measuring three-dimensional position information of a point on the surface of an object. In one embodiment, the method includes the steps of providing two sources of radiation having a spectral distribution, illuminating the surfa... | 02/10/2004 |
| 6636255 | Three-dimensional image scanner and heat-insulating device for optical apparatus In a three-dimensional image scanner, a grating projection type moire topography is used, so as to capture three-dimensional form information of an object to be measured easily in a short time with a high degree of freedom in measurement. Also, a heat-ins... | 10/21/2003 |
| 6577405 | Phase profilometry system with telecentric projector An optical system for computing a height of a target on a surface includes a light projector for projecting light. The light passes through a patterned reticle and a projector lens so as to illuminate the target with an image of the pattern. The light is ... | 06/10/2003 |
| 6078396 | Non-contact deformation measurement A method of analysing out of plane deflections in materials under load utilising the projection of a reference grating on to such a material whilst recording information relating to the individual color channels of a color video recording camera thereby p... | 06/20/2000 |
| 6075893 | Computer controlled optical system for angular alignment of structures using moire patterns A computer controlled optical system for angular alignment of structures which uses an optical imaging system input to a computer to synthesize regularly spaced reference and test line patterns replicated from binarized edges taken from the optical images... | 06/13/2000 |
| 5991004 | Lens focus shift sensor A focus shift sensor includes a light source which directs light through a first grating to form a pattern of light. The pattern is directed through the lens which images the pattern at a second grating. The two gratings have different periods such that t... | 11/23/1999 |
| 5847832 | Moire topographic measurement A hand-held instrument (10) and associated method for providing optical measurements of the contour, range and motion of an object, such as a tympanic membrane of an ear, in real time, and to provide for simultaneous visualization of the object. The instr... | 12/08/1998 |
| 5835223 | System for measuring surface flatness using shadow moire technology A system for measuring surface characteristics of an electronic interconnection component, such as a printed circuit board, by analyzing shadow moire patterns. Printed circuit boards are carried on a continuous conveyor under a grating. For each printed c... | 11/10/1998 |
| 5835218 | Moire interferometry system and method with extended imaging depth A moire interferometry system and method are provided for achieving full field surface contouring with an extended depth of view of image. The moire interferometry system includes a projection system generally made up of a light source, imaging lens and a... | 11/10/1998 |
| 5732163 | Angular alignment of structures using moire patterns This invention uses an optical imaging system input to a computer to synthesize regularly spaced reference and test line patterns replicated from binarized edges taken from the optical images of structures to be aligned. The two patterns are then combined... | 03/24/1998 |
| 5701179 | Method and system for measuring dimensions of an edge of a part A non-contact, non-destructive measurement method and system for the edge of parts such as the cutting edge or "hone" of tools wherein the shape and dimensions of the hone are measured with high accuracy (i.e., within 5 microns) and repeatability. Given a... | 12/23/1997 |
| 5663796 | Optical sensor and optical apparatus using the same In an optical apparatus utilizing moire fringes to inspect surface irregularities of a test object, a single light beam forms a light beam network in an optical sensor (28) such that the test object can be two-dimensionally detected, thereby preventing th... | 09/02/1997 |
| 5613013 | Glass patterns in image alignment and analysis A system and method is provided for aligning and analyzing multiple images using Glass patterns. A Glass pattern is a Moire-like pattern obtained by superimposing an image on a transformed version of itself. The method includes superimposing the images to... | 03/18/1997 |
| 5601364 | Method and apparatus for measuring thermal warpage A method and apparatus for measuring thermally induced warpage in test elements such as printed wiring boards and printed wiring assemblies, including a heating chamber having a transparent window and support structure for supporting a printing wiring boa... | 02/11/1997 |
| 5460758 | Method and apparatus for production of a three-dimensional object A three-dimensional object is modelled by solidifying superposed layers in such a manner that on an already solidified layer a following layer of initially liquid or powdery material is solidified by light action or the like in correspondence with the for... | 10/24/1995 |
| 5436462 | Video contour measurement system employing moire interferometry having a beat frequency pattern An electroptic metrology system uses Moire interferometry to generate contour information on the surface of an object. Interfering coherent beams generate a n image on the object's surface that includes a stripe pattern. The surface is viewed with a high ... | 07/25/1995 |
| 5413481 | Method and apparatus for manufacturing fitting members For the manufacture of a fitting member, such as for a dental prosthesis, the invention proposes for the reception part receiving the same and in order to adapt to the remaining stump, a method and an apparatus in which an optical groove grating is repeat... | 05/09/1995 |
| 5383025 | Optical surface flatness measurement apparatus The flatness of at least a portion of a substantially planar surface (16) is measured by illuminating the surface through a beam splitter (12) incorporating a grid (13) or other patterned shield. The light pattern reflected from the surface (16) is direct... | 01/17/1995 |
| 5311286 | Apparatus and method for optically measuring a surface An apparatus and method measures the roughness or some other surface dimension by transmitting a beam of light through a grating member at an angle of incidence relative to the grating member. The grating member has a plurality of parallel opaque bars and... | 05/10/1994 |
| 5307152 | Moire inspection system A moire interferometry system for detecting defects in a surface of a panel. The moire interferometry system is adapted to be used as a defect detection tool and not specifically as a surface measurement tool. The system includes a moire projection system... | 04/26/1994 |
| 5289264 | Method and apparatus for ascertaining the absolute coordinates of an object An apparatus is used for ascertaining the absolute coordinates of an object (1). Said apparatus includes a light source (6), projection optics, in particular a projection objective (7), a projection grating (2) which is projected onto the object (1) throu... | 02/22/1994 |
| 5202749 | Process and device for observing moire patterns of surfaces to be tested by application of the moire method using phase shifting The object of the invention is a process for observing moire patterns of surfaces to be tested, wherein the object gratings to be observed are pictured onto auxiliary gratings and the moire patterns generated thereby are detected, stored and/or processed ... | 04/13/1993 |
| 5189493 | Moire contouring camera A moire contouring imaging device for small field moire imaging in which both the illumination and viewing optical beam paths pass through a common primary lens and optical grating. The use of such common optical elements improves optical stability and ac... | 02/23/1993 |
| 5187539 | Mirror surface characteristic testing An apparatus and method are disclosed for characterizing the surface of mirrors in which a cross-grid type phase grating is illuminated from behind by light reflected from the mirror so as to create a grid-like interference pattern when observed along an ... | 02/16/1993 |
| 5128550 | Method of and an apparatus for testing large area panes for optical quality A method of testing large area panes of a transparent material for optical quality, especially automotive windshield, uses a light box having a uniformly illuminated wall along which a planar grating is provided. The grating has an area at least equal to ... | 07/07/1992 |
| 5085502 | Method and apparatus for digital morie profilometry calibrated for accurate conversion of phase information into distance measurements in a plurality of directions Projectors and cameras disposed about an object under test obtain digital moire information of overlapping aspects (views) of the object. The system is calibrated using a calibration pattern of straight lines on a flat reference surface and a projected pa... | 02/04/1992 |
| 5069548 | Field shift moire system An apparatus and method for providing high resolution non-contact absolute contour measurements of an object with moire interferometry. The invention utilizes a projection moire system in which the entire projection system is translated to perform a field... | 12/03/1991 |
| 5069549 | Moire contouring camera A moire contouring imaging device for small field moire imaging in which both the illumination and viewing optical beam paths pass through a common primary lens and optical grating. The use of such common optical elements improves optical stability and ac... | 12/03/1991 |
| 5025285 | Apparatus and method for shadow moire mapping A shadow Moire grille may be inexpensively produced by enlarging the lines of a master grille on an adjacently positioned photoreproduction MYLAR strip. By varying the ratio of magnification, the line density on the MYLAR strip may be quickly and accurate... | 06/18/1991 |
| 5025476 | Redotopography apparatus and method using moire fringe analysis to measure foot shapes A pedotopography apparatus which measures the shape of a foot by producing a moire fringe pattern representative of the underside of the foot, capturing and storing an image of the moire fringe pattern in an image storage buffer, analyzing the image to lo... | 06/18/1991 |
