301 results about "Profilometer" patented technology

An aspect of the present invention relates to a magnetic tape comprising, on one surface of a nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder, and thereon, a magnetic layer containing a ferromagnetic powder and a binder, wherein

• • the magnetic layer contains a nonmagnetic filler the average particle diameter φ of which satisfies relation (I) below with a thickness t of the magnetic layer:

1.0≦φ/t≦2.0  (I);

• • the thickness t of the magnetic layer ranges from 30 to 200 nm;
  • the nonmagnetic layer has a thickness ranging from 30 to 200 nm;
  • a composite elastic modulus as measured on a surface of the magnetic layer ranges from 6.0 to 8.0 GPa; and
  • a centerline average surface roughness Ra of the surface of the magnetic layer, as measured by an optical three-dimensional profilometer, ranges from 0.2 to 1.5 nm.

An apparatus and method for injecting gas within a plasma reactor and tailoring the distribution of an active species generated by the remote plasma source over the substrate or wafer. The distribution may be uniform, wafer-edge concentrated, or wafer-center concentrated. A contoured plate or profiler modifies the distribution. The profiler is an axially symmetric plate, having a narrow top end and a wider bottom end, shaped to redistribute the gas flow incident upon it. The method for tailoring the distribution of the active species over the substrate includes predetermining the profiler diameter and adjusting the profiler height over the substrate. A coaxial injector tube, for the concurrent injection of activated and non-activated gas species, allows gases to be delivered in an axially symmetric manner whereby one gas can be excited in a high density RF plasma, while the other gas can be prevented from excitation and/or dissociation caused by exposure to the plasma or heated surfaces in the source apparatus. The profiler is used in conjunction with the coaxial injector tube for redistributing the excited gases emerging from the injector tube, while allowing the non-excited gases to pass through its center.

Internal components of power generation machines, such as gas or steam turbines, are inspected with a laser profilometer inspection system that is inserted and positioned within the turbine, for example through an inspection port that is in communication with an open inter-row spacing volume between an opposing turbine vane and turbine blade row. Component surface profile scans are performed to determine relative profile heights along a two-dimensional scan line generated by the profilometer. Three-dimensional profile information is obtained by translating the scan line across the surface. Real time profile information is gathered without physical contact, which is helpful for extracting off-line engineering information about component surface conditions, including surface spallation, perforation, and gaps between components. The system is capable of determining blade tip gap between a turbine blade tip and its opposing abradable surface in the turbine casing.

Methods are disclosed that provide for structures and techniques for the fabrication of ordered arrangements of crystallographically determined nanometer scale steps on single crystal substrates, particularly SiC. The ordered nanometer scale step structures are produced on the top surfaces of mesas by a combination of growth and etching processes. These structures, sometimes referred to herein as artifacts, are to enable step-height calibration, particularly suitable for scanning probe microscopes and profilometers, from less than one nanometer (nm) to greater than 10 nm, with substantially no atomic scale roughness of the plateaus on either side of each step.

The invention discloses a white light interference optical profile meter, comprising a macro/micro two-stage driving and displacement metering device in a vertical direction, white light interference displacement sensors and a universal table, wherein, the white light interference displacement sensors are fixed on the driving and displacement metering device fixed on an upright post, and the upright post is fixed on a vibration isolating table facet on which the universal table is placed. The wide-range three-dimensional optical profile meter based on white light interference and vertical scanning technology realizes rough and fine two-stage driving respectively by a servo motor and piezoelectric ceramic, so as to drive the white light interference displacement sensors to integrally move, adding the servo motor in vertical displacement can enlarge the measurement range, and vertical scanning is accomplished by the piezoelectric ceramic. The measurement of macro/micro displacement is completed by using the same diffraction grating metering system. The profile meter is capable of automatically searching for interference fringes and realizing the three-dimensional profiles of wide-range non-contact measurement planes and curved surfaces, and has the characteristics of high measurement precision, large measurement range, low cost and the like.

The invention relates to the technical field of hard and brittle material ultra-precision machining. In order to achieve ductility domain grinding of the largest cutting depth, high surface quality of the hard and brittle material, and efficient and high-precision production machining, according to the technical scheme, a method and device for determining the grinding brittleness-ductility transformation critical cutting depth of the hard and brittle material comprises the following steps of (1) according to a grinding wheel used in ultra-precision grinding, determining the number, shape and distance of grains of a homemade multi-grain tool, (2) according to the grain shape, distance and front-angle parameters selected in the step (1), machining three or more grains on a grain base body, (3) controlling the multi-grain tool and a workpiece to generate relative motion, beginning to conduct scratching on the surface of the workpiece, meanwhile, controlling the multi-grain tool to conduct continuous feeding, enabling the depth of the scratch to continuously change, and observing and measuring the workpiece after scratching by utilizing a surface contourgraph and a confocal microscopy. The method is mainly applied to ultra-precision machining.

The invention relates to a swing arm type three-dimensional contourgraph which comprises a measuring head system, a transverse arm, an upright post, a counter weight, a measured plane element, a workpiece turntable and a transverse arm turntable, wherein one end part of the upright post is arranged in a mounting hole of the transverse arm turntable and fixedly connected with the transverse arm turntable, and the transverse arm is arranged in another end part mounting hole of the upright post; one end part of the transverse arm is provided with the counter weight, while the other end part of the transverse arm is provided with the measuring head system; the measured plane element is arranged on the workpiece turntable; a detection end of the measuring head system is in contact with the measured plane element; and the transverse arm and the upright post are used for finishing the rotating motion of the measuring head system; and the counter weight is used for balancing the measuring head system and the transverse arm so as to guarantee the transverse arm turntable to maintain stable rotation. The contourgraph can be used for the measurement and the analysis of the three-dimensional surface profile of a heavy-caliber high-precision plane element, wherein measurable parameters comprise three-dimensional morphologies, two-dimensional morphologies, PV (Peak Value), RMS (Root Mean Square) and three-dimensional morphological volumes.

A profilometer for measuring a surface profile of a measuring target has a lighting device for irradiating the measuring target with light, an imaging device for imaging a reflected light from the measuring target, and a normal calculation section for calculating a normal direction of a surface at each position of the measuring target from an imaged image. The lighting device has a light emission region of a predetermined extent. A radiance of center of gravity of a light source distribution of a point symmetric region coincides with a radiance of the center of the point symmetric region in an arbitrary point symmetric region of the light emission region.

The invention discloses a three-dimensional laser scanning on-line detection profiler, which comprises a shell, wherein an image acquisition sub-system is arranged in the shell. The image acquisition sub-system is used for projecting laser onto a detected object; after being acquired by a camera, an image is transmitted to an image sub-processing system through an Ethernet; the image sub-processing system pre-processes the image transmitted by the image acquisition sub-system through image processing algorithm to highlight the characteristics of a light strip center and then obtain the two-dimensional size of the detected object; the three-dimensional profile size of the detected object is determined by combining the two-dimensional size with a displacement size of the detected object which is provided by an external control sub-system; and the image acquisition sub-system, the image sub-processing system and the control sub-system are commonly connected with a power system. The three-dimensional laser scanning on-line detection profiler of the invention has the advantages of realizing three-dimensional model detection of a product, guaranteeing the quality of the product and improving the production efficiency, along with short detection time.

Profilometers for industrial metrology and other applications are described. A line is projected on a surface to be profiled. The line is scanned to build a three dimensional point cloud allowing the three-dimensional (3D) profile of the surface to be determined. In some embodiments, the line is projected by a laser system. In other embodiments, the line is projected by a digital micromirror device (DMD). In still further embodiments, multiple lines, or other patterns are projected.

A system and method for measuring defects, film thickness, contamination, particles and height of a thin film disk or a silicon wafer.

An apparatus, method, and system are disclosed, which provide a means of real time surface profile evaluation in wet cement. The sliding profiler can be pulled behind various stages in a paving train. The user is alerted to profile discrepancies while the cement is still pliable and afforded the opportunity to make adjustments to the paving process, to include additional finishing. The system is made of affordable components and thus is appropriate for construction projects of different scale. In addition, multiple sliding profilers can measure the profile of multiple wheel paths simultaneously. The system can measure profile changes of less than 150 mils. Use of the system described herein will contribute to better roadways at lower costs.

Non-destructive evaluation optical inspection systems include video cameras or other reflective-photonic optical instruments, such as laser profilometers or 3D white light laser dimensional scanners, which are incorporated in a camera head. The camera head is coupled to a distal end of a self-supporting and shape-retaining elongate deformable deployment tether. The deployment tether is bendable, for insertion through cavities of power generation machines and orientation of the camera head field of view on the internal area of interest. The deployment tether is capable of being deformed repeatedly, for inspection of different areas of interest. In some embodiments, interchangeable camera heads are selectively coupled to the deployment tether, so that a kit or family of different optical inspection instruments are available to carry out multiple types of inspections within a single or multiple types of power generation machinery.

An automated system for periodically sampling water bodies, such as lakes, and delivering the test results to a remote computer using a communication system. In particular, the system has a variable buoyancy profiler with a dynamic buoyancy compensator responding approximately linear to a water pressure created by an external water body so as to actively or passively interact with an external force or pressure thereby moving the profiler to a target depth.

The invention belongs to the technical field of optical precision tests, and relates to a device and a method for precisely detecting large-caliber aspheric surfaces. The device and the method can be used for detecting the contours of large aspheric surface components in precision optical systems in a high-precision manner. The device is of an open type contour instrument structure with rotary-linear datum common base planes on the basis of linear/rotary datum technologies and the like, so that the contours of the large-caliber aspheric surface components can be detected on the basis of precision flotation rotary centers in the high-precision manner. The device and the method have the advantages that common base plane designs for rotary-linear datum systems, turning designs for measurement frames and designs for open type non-gantry structures are adopted, Abbe errors of instruments can be reduced, the movement precision of a precision linear flotation guide rail can be realized to the greatest extent, and parameters of the contour of a mother line of each to-be-detected aspheric surface can be directly measured by a sensing measuring system which synchronously moves with the precision linear flotation guide rail; the contours of multiple mother lines of the to-be-detected aspheric surfaces can be measured by the aid of precision flotation rotary technologies, and the contours of the large-caliber aspheric surfaces can be quickly detected in the high-precision manner by means of fitting.

An observing apparatus includes a lighting device for irradiating a surface of a measuring target with light having a first light source distribution, and an imaging section for imaging the surface of the measuring target. Considering a first plane passing through a measurement point, the first light source distribution is set such that: (1) a radiance L₁₁(θ) changes in a continuous or stepwise manner according to an angle θ, and (2) the radiance L₁₁(θ) is not zero in a local region of a predetermined range of ±σ having a point located at a predetermined angle θc as a center on the first plane when viewed from the measurement point, and the following equation substantially holds for arbitrary a satisfying 0<a≦σ; L₁₁(θ_c−a)+L₁₁(θ_c+a)=2×L₁₁(θ_c).

Method for measuring a height map of a test, including measuring a coarse height map of the test surface with a pre-map sensor provided to an optical profiler with a relatively long working distance and/or a large field of view, storing the coarse height map in a memory, subdividing the coarse height map into sections appropriate for the field of view of a high resolution optical profiler sensor provided to the optical profiler, calculating corresponding X, Y and Z positions for the optical profiler sensor with respect to the test surface, calculating a trajectory in the X, Y, Z-direction for the optical profiler sensor with respect to the test surface using the calculated X, Y, Z-positions, moving the optical profiler in the X, Y, Z-direction with respect to the test surface according to the trajectory, and measuring a high accuracy height map with the high resolution optical profiler sensor.

A polar coordinate-based profilometer includes a base, a rotary stage, a linear stage, and a probe device. The rotary stage is mounted on the base and includes a rotary table rotatable about a vertical axis oriented orthogonal to the base. The linear stage is mounted on the rotary table and is rotatable therewith. The linear stage includes a linear slide member that is translatable along a radial axis orthogonal to the vertical axis. The probe device is mounted on the linear slide member and is translatable therewith. The probe device includes a probe tip that is linearly displaceable along the radial direction and communicates with a linear displacement-sensing transducer. Alternatively, the probe device scans an object without contacting the object. Methods are provided for measuring an object based on polar coordinates, and correcting for misalignment prior to measurement.

An apparatus for sensing position data of a light pattern created by a known light source on an object, comprising an optical system for collecting an incident light beam of the light pattern and transmitting the incident light beam to a beam splitter. The beam splitter has a known reflection/transmission ratio, such that the incident light beam from the light pattern received on the surface of the beam splitter results in a transmission channel, transmitted through the beam splitter, and a reflective channel, reflected from the beam splitter, with intensities of the transmission channel and the reflective channel varying as a function of a position of the incident light beam on the surface of the beam splitter. Detectors detect the intensities of the reflective channel and of the transmission channels. Dimensions of points of the light pattern on the object are calculable as a function of the intensity of the reflective channel and of the intensity of the transmission channel.

The invention discloses a method for machining an off-axis aspherical mirror. The method comprises the steps that 1, a rotary aspherical matrix structure is designed; 2, a through hole for inlaying of a daughter structure is excavated in a matrix blank; 3, a cylindrical integral workpiece is formed by combining a matrix and a daughter; 4, an initial spherical surface is machined; 5, grinding is guided through the surface shape error detecting result of a contourgraph, and the surface shape error between the initial spherical surface and a rotary aspheric surface is corrected; and 6, polishing is guided through the surface shape error detecting result of an interferometer or knife-edge tester, and the off-axis aspherical daughter is taken out after polishing is completed. The method is characterized in that the caliber D of the initial spherical surface is equal to the diameter of a cylinder of the integral workpiece, and the curvature radius R of the initial spherical surface is equal to the radius of a circumcircle of a triangle formed by a vertex in a rotary aspheric bus equation and a first point and a second point which are located at the position with the caliber of 1.414 D on a rotary aspheric bus. According to the method, the problem of the influence of the fringe effect in the prior art is solved, the efficiency of aspherical surface machining is improved, and machining difficulty is reduced.

The invention provides a device and method for measuring the effective arm length of a swing arm type contourgraph. The device comprises a first target ball, a second target ball, a fine-tuning mechanism, a cross arm, a cross arm support, a balance weight block, a computer, a first angle block, a cross arm turntable, a second angle block, a laser tracking instrument, a workpiece turntable, a mirror face to be tested, a touch type sensor and a work table face. The cross arm rotates around the axis of the cross arm turntable, a measurement head ball center of the touch type sensor, the ball center of the first target ball and the ball center of the second target ball form an arc track rotating around the axis of the cross arm turntable in space, and the laser tracking instrument respectively tracks and measures the arc track of the ball center of the first target ball and the ball center of the second target ball in the space. By means of data processing of the computer, the distance between the measurement head ball center of the touch type sensor and the axis of the cross arm turntable, namely the effectively arm length of the swing arm type contourgraph, is obtained.

A powder coating composition of an intimate mixture comprising

• • (A) 60 to 99 wt % of a mixture comprising at least one polyester resin and at least one (meth)acrylate resin,
  • (B) 0 to 30 wt % of at least one cross-linking agent,
  • (C) 0.1 to 10 wt % of at least one pigment,

component (A) and component (C) are selected to provide the cured-powder coating composition with a low gloss of 1 to 20 gloss units at 60° angle according to DIN 67530 (ISO2813) and a surface structure having a value of Integral 1 in the range of higher than 8.00E+00 measured by the mechanical profilometry Fourier analysis, and the wt % are based on the total weight of the powder coating composition. The powder coating composition provides the desired special metallic effect of the coated surface which meets the metallic effect resulted with anodized aluminium.

Phased array ultrasonic contact transducer, with a flexible wedge and a profilometer. This transducer applies to the non-destructive monitoring of an object and comprises: a set of elements that are rigidly integral with each other, at least part of the elements serving as ultrasound transmitters, a wedge whereof at least the front face is flexible to be applied against the surface of the object and the rear face of which is made integral with the set of elements, and a profilometer to measure surface variations and supply signals representative thereof to allow the transmitters to create a focused ultrasonic beam whereof the characteristics are controlled in relation to the object.

This invention provides a system and method for laser profiling that simplifies the task of setting up and using laser profiling systems and associated applications by providing a profiler assembly that includes a predetermined arrangement of lens and spaced-apart laser in which the geometry and calibration parameters are predetermined. The profiler assembly is adapted to mount directly into the camera mount (typically threaded) of a conventional vision system camera. All components needed to perform the profiling task can be integrated into the profiler assembly. The integration of components in a single interchangeable/exchangeable assembly makes it straightforward to optimize/adapt the assembly for a particular profiling application.