Abstract: A method and apparatus to maintain image focus on parts such as wafers, circuit boards, or high-density substrates as the part is being inspected. Focus performance is independent of feature and trace orientation and density. This apparatus can be easily integrated into an inspection system and can maintain focus on parts with high aspect ratio structures and or low or non-reflective insulators. It enables the inspection of high-density fine line products requiring the use of high resolution, high numerical aperture (NA) imaging optics with small depths of focus (DOF) that must be kept in focus during the inspection.

Abstract: Techniques for creating a three dimensional model of an object and eliminate artifacts due to changes in orientation of the object between successive scans. Such techniques may be applied to line scans and slice scans of an object.

Abstract: Methods and apparatus for inspection of electronic parts such as semiconductor wafers, high-density circuit boards, multi-layer substrates, chrome on glass masks, and other fine line products which compensates for reference misalignment. Conductor linewidth and space measurements are performed along the entire length of every conductor to sub-camera pixel, sub-micron accuracy in real time as the part is scanned. Billions of metrology measurements are also performed in real time to sub-micron accuracy. A self-learning automated method to extract measurement values from Computer Aided Design (CAD) files is described. This method automatically determines locations to perform these billons of operations within defined allowed manufacturing tolerances.

Abstract: Techniques for creating a three dimensional model of an object and eliminate artifacts due to changes in orientation of the object between successive scans. Such techniques may be applied to line scans and slice scans of an object.

Abstract: Techniques for creating a three dimensional model of an object and eliminate artifacts due to changes in orientation of the object between successive scans. Such techniques may be applied to line scans and slice scans of an object.

Abstract: A method and system for generating a three-dimensional model of a contact lens with a front and a back surface, in which the entire back surface consists of an array of independent data points shaped to conform to three-dimensional data provided by an ocular topographer. The sampling density is sufficiently high to characterize anomalies or injuries anywhere in the eye to optimize comfort and fit. The methods and systems also include modeling a scleral lens which rests either solely on the sclera, or straddles the limbus extending partially into the cornea is described. The resting surface conforms to the topology of the underlying ocular surface with topology guiding the design. Additional methods and systems model scleral lens optics without the use of trial lenses. The lens models can be used to machine or 3D print a lens that fits the patient. Such lenses benefit patients that suffer from dry eyes or whose eyes are not normally dry, but feel dry after wearing conventional contact lenses.

Abstract: Techniques for creating a three dimensional model of an object and eliminate artifacts due to object motion. Such techniques are applied to line scans and slice scans of an object.

Abstract: A method and system for generating a three-dimensional model of a contact lens with a front and a back surface, in which the entire back surface consists of an array of independent data points shaped to conform to three-dimensional data provided by an ocular topographer. The sampling density is sufficiently high to characterize anomalies or injuries anywhere in the eye to optimize comfort and fit. The methods and systems also include modeling a scleral lens which rests either solely on the sclera, or straddles the limbus extending partially into the cornea is described. The resting surface conforms to the topology of the underlying ocular surface with topology guiding the design. Additional methods and systems model scleral lens optics without the use of trial lenses. The lens models can be used to machine or 3D print a lens that fits the patient. Such lenses benefit patients that suffer from dry eyes or whose eyes are not normally dry, but feel dry after wearing conventional contact lenses.

Abstract: Techniques for creating a three dimensional model of an object and eliminate artifacts due to object motion. Such techniques are applied to line scans and slice scans of an object.

Abstract: A method and apparatus for measuring the topography of the corneal and scleral regions of the eye. The measurements provide surface contours that are useful in the manufacture of scleral contact lenses.

Abstract: A method and apparatus for measuring the topography of the corneal and scleral regions of the eye. The measurements provide surface contours that are useful in the manufacture of scleral contact lenses.

Abstract: Techniques for creating a three dimensional model of an object and eliminate artifacts due to object motion. Such techniques are applied to line scans and slice scans of an object.

Abstract: A method and apparatus for measuring the topography of the corneal and scleral regions of the eye. The measurements provide surface contours that are useful in the manufacture of scleral contact lenses.

Abstract: The present disclosure provides a viscometer or a rheometer including a touch screen interface. The touch screen interface enables a wider variety of user interface options and functions that would otherwise be cumbersome to implement. These options and functions include a wide variety of settings, security features, and the ability to manipulate test definitions and test data.

Abstract: Viscometer shaft coupling with upper shaft assembly (12) and lower shaft assembly (14), with overlapping flat ends thereat a diametral plan and constrained by a slidable sleeve (16) overlapping the shafts.

Abstract: A fluid pressure sensor particularly useful for measuring pressure up to approximately 2000 psi has a hexport (12, 112, 212, 312) formed with a stop surface (26, 326) in a bottom wall (18) circumscribing a fluid pressure inlet (16). A pressure sensing module (22) is received on the stop surface and a distal end (40) of a wall (20, 120, 320) of the hexport is crimped to lock the pressure sensing module onto the stop surface with the stop surface limiting the amount of compression of an O-ring (30) disposed contiguous to and inboard of the stop surface. In one embodiment the crimp is placed directly on a metal ring (38) attached to a plastic connector (32) which in turn transfers the crimping force to the pressure sensing module. In other embodiments (FIGS. 2, 3) the crimp is placed directly in the pressure sensing module to form a subassembly.

Abstract: A monolithic capacitive pressure transducer (12, 12') is made by separately forming under pressure a diaphragm (22, 22') and a base (24, 24') having a recess (26) in the top surface using ceramic powder coated with an organic binder. Metal layers are deposited on the two pieces and the pieces are then joined together to form a single unit. A spacer (36) may be inserted in the recess to ensure that a predetermined gap is maintained between the two parts during the joining operation. The parts are then heated to allow the binder organics, as well as the spacer organics if a spacer is employed, to be vaporized and/or decomposed and removed through the open pores of the diaphragm and base and then sintered to change the parts into a monolithic body and to convert the metallized layer into a conductive layer bonded to the ceramic.

Abstract: A viscometer (10) has a spindle (12) mounted on a rotatable shaft (14) which is, in turn, contained in a tubular rotatable shaft (16) which is within a fixed hollow shaft (18). The latter is suspended from a flange (20) that mates with a flange (22) of an access port (24) of a reactor vessel (RV). There is a base for an external tower (21) that carries a motor (M) and gearing (G) to drive the rotatable shafts (14, 16). A torque interconnection between the rotatable shafts allows angular deflection between them and a transducer (28) picks up such deflection.

Abstract: A monolithic capacitive pressure transducer (12) is shown composed of ceramic material having a first closed cavity (12) separated from a surface thereof by a flexible wall member and a second closed cavity (16) defined by rigid wall members. Capacitor plates (32, 36; 40, 44) are formed on two opposed surfaces defining each cavity. Vias (33, 37; 41, 45) are formed extending from the capacitor plates to permit electrical connection therewith. The transducer is made by separately forming under pressure a diaphragm (20) and first and second base portions (22, 30) having recesses (24) in the top and bottom surfaces using ceramic powder coated with an organic binder. A metal layer is deposited on the pieces which are then joined together to form a single unit. A spacer (26) may be inserted in the recesses to ensure that a predetermined gap is maintained in each cavity during the joining operation.