Lockheed Missiles & Space Company, Inc.

Carl Zeiss Meditec Gmbh

Carl Zeiss Meditec Ag

Rick A Williams

Matthew J Everett

Scott A Meyer

Martin Hacker

Keith E O'Hara

Claus Flachenecker

Edward D Huber

Dean M Shough

Rebecca L Welling

Osuk Y Kwon

Scott E Reinhart

Keith E O'hara

A line scan imager is used to determine the motion of a subject. Each line of image data from the line scan imager is compared with a reference image. The location of a matching line in the reference image reveals the displacement of the subject. The current subject displacement can be determined based on each line of image data. The resulting displacement information can be used to correctly place other optical beams on the subject. The method can be applied to tracking the human eye to facilitate measurement, imaging, or treatment with a beam of optical radiation.

Method and apparatus for measuring motion of a subject using a series of partial images from an imaging system

A laser inspection tool system (100) includes a hand-held remote tool head (108) that provides an image of a target object (116) and a measurement surface (118). The remote tool head (108) includes light sources (208) and mirrors (210) that in conjunction generate two perpendicular lines of light that impinge the target object (116) and the measurement surface (118) and reflect to a form an image in a camera (218) in the remote tool head (108). The remote tool head (108) may be oriented at any angle relative to the measurement surface (118). A processor (102) remotely coupled to the remote tool head (108) captures the image and determines the offset between the light reflected by the target object (116) and the light reflected by the measurement surface (118), and the angle between the reflected lines of light. Using the offset and the angle, the processor (102) determines the height of the top of the target object (116) above the measurement surface (118) and the angle of the remote tool head (108) relative to the measurement surface (118).

Laser inspection tool system

An optical vision inspection system (4) and method for multiplexed illuminating, viewing, analyzing and recording a range of characteristically different kinds of defects, depressions, and ridges in a selected material surface (7) with first and second alternating optical subsystems (20, 21) illuminating and sensing successive frames of the same material surface patch. To detect the different kinds of surface features including abrupt as well as gradual surface variations, correspondingly different kinds of lighting are applied in time-multiplexed fashion to the common surface area patches under observation.

Vision inspection system and method

A method for measuring the contours (30) of a three-dimensional object (4); and a method for calibrating an optical system (2, 8). The object (4) is placed into the field of view of the optical system (2, 8). The optical system (2, 8) is activated to obtain a set of data giving a phase (x.sub.t) at each of a plurality of pixels corresponding to the object (4). The phases (x.sub.t) are unwrapped, e.g., by a method of ordered phase unwrapping. The unwrapped phases are converted into a set of three-dimensional coordinates (x.sub.s, y.sub.s, z.sub.s) of the object (4) for each of the pixels. These coordinates (x.sub.s, y.sub.s, z.sub.s) can be portrayed on a display of a computer (10). The method for calibrating the optical system (2, 8) shares several common steps with the above method. In addition, coordinates of a test calibration fixture (38, 46) are first mechanically measured. Following optical measurement of the calibration fixture (38, 46), an optimization procedure is used to minimize the difference between the mechanically measured coordinates (x.sub.m, y.sub.m, z.sub.m) and the coordinates (x.sub.s, y.sub.s, z.sub.s) calculated from the optical measurements. The optimization procedure in the calibration method fixes the intrinsic and extrinsic parameters of the optical system (2, 8). A blending method can be used to increase the dynamic range of the measured intensity. Phase shifting is performed by either a method of temporal phase shifting or a method of spatial phase shifting.

Contour measurement system

A measurement device or system (11) for determining features of a three-dimensional object (20) from two-dimensional images includes a projector (27) for projecting a pattern (73) upon the object (20), at least one imager (17, 19) for obtaining multiple sets of image data of the illuminated object (20) and a processor (47) for obtaining a three-dimensional image (81) of the object (20) from the multiple sets of data.

Three-dimensional measurement device and system

Method of calibrating a three-dimensional optical measurement system

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Orinda, CA, United States of America

Rick A Williams