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| Number | Title | Issue Date |
| 5495336 | Position detecting method for detecting a positional relationship between a first object and a second object A method of detecting the positional relationship between a first object and a second object is disclosed which includes projecting a first light through a convex lens mark of the first object and a concave lens pattern of the second object onto a first p... | 02/27/1996 |
| 5486925 | Displacement sensing apparatus for a movable member A light receiving portion which receives light from a light emitting portion through slits formed in a rotating disc is provided with, first, second and third photodiodes. With an output of the second photodiode as a reference value, an output of the firs... | 01/23/1996 |
| 5471054 | Encoder for providing calibrated measurement capability of rotation or linear movement of an object, label medium and an optical identification system A scale comprising a regular arrangement of optically or magnetically different response characteristics such as light reflection and light diffusion portions or light reflection and absorption portions is attached to a moving object either directly or by... | 11/28/1995 |
| 5453839 | Optoelectronic measuring scale An optoelectronic measuring scale for determining and indicating position of light emitted from a beam source is provided. The measuring scale comprises a composite unit including a profiled body, a number of discrete photoelements fixedly mounted on a ci... | 09/26/1995 |
| 5444240 | Position detecting apparatus employing an estimating function A position detecting apparatus with a sampling function, comprises a waveform generator for generating repetitive periodic waveforms in relation to a moving object to be measured. A processor samples the output of the waveform generator and, after digitiz... | 08/22/1995 |
| 5404226 | Process for determining the position of a positioning body in relation to a reference body and device for implementing the process The description relates to a process for determining the position of a positioning body in relation to a reference body in which the positioning body has a scale with markings at constant distances and the reference body has a scanner with a projection su... | 04/04/1995 |
| 5383284 | Measuring carriage for a linear measuring system A measuring carriage for a linear measuring system comprises a measurement sensing entrainment block arranged outside a tubular protective housing defining an interior chamber and a slot sealed by sealing lips in one side thereof. The block comprises a to... | 01/24/1995 |
| 5383014 | Photoreceptor belt motion sensor using linear position sensors The velocity of a photoreceptor belt is measured by sensing the passing of illuminated slits in the belt, as the belt moves in a process direction. Two linear position sensors are positioned so as to view the passing of the illuminated slits. The sensors ... | 01/17/1995 |
| 5336983 | Accelerometer and angular accelerometer An accelerometer includes a main body, a displacing member, a scale, and a detecting unit. The displacing member is attached to the main body and has a displacing portion displaced relative to the main body at least in a direction of acceleration measurem... | 08/09/1994 |
| 5206704 | Position measuring apparatus and method of use thereof A position measuring apparatus includes an optical instrument placed in a first plane, a first diffraction grid placed in a second plane, parallel to the first plane, a retro-reflecting element, a second diffraction grid, and an optical element, preferabl... | 04/27/1993 |
| 5195162 | Planar polymer light guide methods and apparatus The invention introduces the concept of very low cost, fully integrated, large scale planar polymer light guide networks. These networks are intended primarily for automotive applications, including data communication, multiplex, sensor, switch and displa... | 03/16/1993 |
| 5165045 | Method and apparatus for measuring displacement having parallel grating lines perpendicular to a displacement direction for diffracting a light beam A method and apparatus for generating and detecting changes in interference patterns such as may be used to measure small displacements. A collimated beam is diffracted to produce a standing wavefront along a surface. The surface is coincident with the su... | 11/17/1992 |
| 5017013 | Method of determining the position of a reference point of a scanner relative to an incremental scale as well as a reference point communicator The position of a reference point of a scanner relative to an incremental scale with marks arranged thereon with constant spacings is roughly determined based on the marks passed along the scale multiplied by the spacing of the marks, and finely determine... | 05/21/1991 |
| 4854709 | Arrangement for measuring the distance of a marking element on a displaceable body from a reference marking element A measuring arrangement for determining the spacing from a reference marking element of a marking element which is provided on a body which is displaceable relative to the measuring arrangement, for example a scale carrier (20). The measuring arrangement ... | 08/08/1989 |
| 4838696 | Pulsed robotic inspection Robotic machines such as coordinate measuring machines, contour projectors and other optical measuring machines are provided wherein a pulsed light is used to "freeze" the dimensional or positional data. The light source of an electro-optical sensor which... | 06/13/1989 |
| 4823001 | Method of measuring the amount of movement of an object having uniformly periodic structure An object to be measured for the amount of movement thereof has a uniformly periodic structure. The object is illuminated with divergent light emitted from a coherent spot light source. By positionally adjusting the spot light source, the object, and a li... | 04/18/1989 |
| 4786803 | Single channel encoder with specific scale support structure The single channel encoder comprises a transparent scale in which the scale divisions are defined by transverse opaque lines having a width greater than the width between the opaque lines. An emitter holder and a detector holder snap together, clamping an... | 11/22/1988 |
| 4756621 | Apparatus for measuring a length of displacement Apparatus for measuring a displacement of a movable member or a diameter of a cylindrical member comprises a photoelectric converting element array to convert light reflected by the surface of the member for producing an electric signal utilized to form a... | 07/12/1988 |
| 4746792 | Optical transducer element and displacement meter comprising such an element Displacement of an object is sensed by a transducer element having light first strips and dark second strips alternating in a direction of object displacement. The first strips are formed as phase gratings having grating lines extending in the direction o... | 05/24/1988 |
| 4689485 | Optoelectronic displacement measuring apparatus using color-encoded light An apparatus for measuring displacement between two members subject to movement relative to one another. The apparatus includes a scale defined by spaced marks provided on one of the members. A light source is arranged to illuminate the marks, wherein lig... | 08/25/1987 |
| 4607956 | Position detecting apparatus A position detecting apparatus provided with a photosensor for optically detecting the scale pattern of an optical scale which moves together with the optical head of the optical disk instrument, and generating an analog signal which corresponds to a pitc... | 08/26/1986 |
| 4542989 | Apparatus for position encoding A position encoder including a holographically recorded, single-frequency, phase grating. When this phase grating is illuminated by a spatially coherent light source, it acts as a basic common path interferometer and constitutes a highly efficient source ... | 09/24/1985 |
| 4526471 | Method for sensing spatial coordinate of article point and apparatus therefor A method for sensing a spatial coordinate of a point of an article, wherein a main coherent light field is formed in the area of the article and an approximate coordinate of a selected point of the article is found by means of an optical characteristic of... | 07/02/1985 |
| 4495952 | Apparatus for measuring jaw movement An apparatus for the contactless measuring of the movement in three dimensions of the jaw and of the condyle in the temporo-mandibular joint respectively comprising opto-electronic signal transmitters and signal receivers between which light signals are t... | 01/29/1985 |
| 4426683 | Pneumatic shock testing machine with digital control A control system for a pneumatically powered shock testing machine is presented which utilizes digital logic and an operator programmed computer. The control system was implemented on a shock machine having a carriage assembly that is lifted by an air pis... | 01/17/1984 |
| 4423958 | Test apparatus for digital photoelectric length or angle measuring instrument A digital photoelectric angle or length measuring instrument, of the type having a scale with at least one division, a scanning unit for scanning the division to generate a scanning signal, and an evaluating unit having a trigger circuit for evaluating th... | 01/03/1984 |
| 4412745 | Apparatus for measuring length or angle A light image of a scale, which bears length or angle information recorded in the form of a bright and dark bit pattern, is projected onto the light receiving surface of a storage effect type sensor, whereby a charge pattern data corresponding to the proj... | 11/01/1983 |
| 4395124 | Apparatus for position encoding A position encoder including a holographically recorded, single-frequency, phase grating. When this phase grating is illuminated by a quasi-monochromatic spatially coherent light source, it acts as a basic common path interferometer and constitutes a high... | 07/26/1983 |
| 4394577 | Displacement measurement device and method At least two types of reflective or emissive materials are applied in alternating manner to a pile or other object to be moved. Ultraviolet energy is emitted toward the materials and reflections or emissions therefrom are received by appropriate detector ... | 07/19/1983 |
| 4359281 | Method and apparatus for testing the braking efficiency of machines In a known method of testing braking effectiveness, a sheet carrying a series of lines is attached to a moving part of a machine and these lines are sensed sequentially by a photo detector as the machine part moves. The output of the photo detector thus g... | 11/16/1982 |
| 4355901 | Arrangement for measuring the position of an index The invention relates to an arrangement for measuring the position of an index of a surveying device comprising a flat-plate micrometer and at least one swinging index. The interfering oscillations, due to external influences, of the index in the course o... | 10/26/1982 |
| 4055376 | Calibration reticle for measuring microscopes A calibration reticle for measuring microscopes is disclosed in which a calibrated distance is established by calibration reference lines whose locations are defined by selected features of the calibration pattern. Preferably, the calibration reference li... | 10/25/1977 |
| 3936195 | Device for determining the position of a structural element The invention is related to a device for determining the position of a structural element to which is affixed a scale composed of regularly spaced markings which are optically cast onto a line scanner containing regularly spaced photosensitive elements, t... | 02/03/1976 |
