| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 356400080 | Of height relative to a light plane | 6 |
| 20080252875 | Laser beam projecting device - A laser beam projecting device, comprising a laser light source for emitting a laser beam, a wavelength selecting film for allowing the laser beam from the laser light source to. pass, and a birefringent optical member arranged on an optical axis closer to an exit side than the wavelength selecting film, wherein the wavelength selecting film is tilted so that an incident angle of the laser beam is in a range of 45° to 80°. | 10-16-2008 |
| 20080309915 | METHOD FOR CORRECTING DISTURBANCES IN A LEVEL SENSOR LIGHT PATH - The invention relates to a level sensor for determining a height of a substrate. The level sensor generates one or more measurement beam and directs the measurement beam to a measurement spot on the substrate and produces a reflected measurement beam. The level sensor also generates one or more reference beams. A detector detects both the reflected measurement beam and the reference beam, respectively, and produces a measurement signal and a reference signal, respectively, the measurement signal being indicative for the height at the measurement spot. A processor that receives these signals and corrects the measurement signal based on the reference signal. The level sensor has an optical arrangement in a predetermined area close to where the substrate is to be located. The measurement beam and the reference beam propagate along substantially equal optical paths of propagation in the predetermined area. The optical arrangement deviates the reference beam from the substantially equal optical paths of propagation in the predetermined area such that the at least one reference beam does not hit the substrate. | 12-18-2008 |
| 20120236289 | METHOD AND DEVICE FOR DETERMINING A DEFORMATION OF A DISK-SHAPED WORKPIECE, PARTICULARLY A MOLD WAFER - The present invention relates to a method and a device for determining a deformation of a disc-shaped workpiece, in particular a mould wafer. The device comprises a rotatable, height and laterally adjustable mounting unit for mounting an inner region of the disc-shaped workpiece; a determination unit for determining eccentricity of a centre axis of the disc-shaped workpiece from a centre axis of the mounting unit and for generating a suitable adjustment signal for the mounting unit; a deposit unit for depositing the disc-shaped workpiece during a process of lateral adjustment of the mounting unit; and a fixed-height detector unit for measuring a deviation of a plurality of measuring points, respectively, in a non-mounted outer region of the disc-shaped workpiece from a predetermined height position corresponding to the deformation by rotating the mounting unit or the detector unit at a predetermined height position of the mounting unit. | 09-20-2012 |
| 20130038858 | MULTIPLE-WAVELENGTH CAPABLE LASER RECEIVER - A laser light receiver used to detect pulsed laser light that is produced by a rotating laser light source on a construction jobsite is disclosed. In this manner, the laser receiver acts as an elevation detector and provides an equipment operator, or a construction worker, with the current elevation status with respect to the plane of laser light. The laser receiver is a unitary device that can detect multiple light frequencies/wavelengths, including laser beams that are in the green, red, and infrared spectra. The laser receiver also is capable of discriminating between such laser beams and other interference light sources, particularly fluorescent light sources. | 02-14-2013 |
| 20150124239 | SYSTEM AND METHOD FOR MEASURING THE POSITION OF THE CONTACT WIRE OF AN OVERHEAD POWER LINE RELATIVE TO A RAILWAY TRACK - The invention relates to a system for measuring the position of the contact wire of an overhead power line, comprising a first measurement means including a vertical rangefinder capable of measuring the height of the contact wire and a second measurement means capable of measuring the offset of the contact wire. The system also comprises at least one first inclinometer that enables the inclination of the mounting of the system positioned on the rails to be measured, and a camera pointing upward and capable of capturing the image of the contact wire, and the second measurement means comprises a second inclinometer secured to the laser rangefinder, which is mounted on a motor-driven lateral-inclination pivot, and which is capable of measuring the angle of the beam thereof relative to the vertical when aimed at the contact wire. | 05-07-2015 |
| 20150345943 | TRACK REFERENCE TARGETS AND METHOD OF USING SAME TO DEFINE LEFT AND RIGHT TOP-OF-RAIL ELEVATIONS - A dimension measuring system and method are provided. Two track reference target (TRT) assemblies are positioned at spaced-apart locations on a railroad track's rails. Each of the TRT assemblies has two targets at fixed positions in a plane perpendicular to the rails. For each of the TRT assemblies, at least one of the two targets is positioned at a known and fixed height over one of the rails. A laser-based distance measuring device measures vector distances to the two targets associated with each of the TRT assemblies. The vector distances are processed in combination with the fixed positions to determine an elevation of each of the rails in the plane associated with each of the TRT assemblies. | 12-03-2015 |
