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| Number | Title | Issue Date |
| 7315794 | Timber survey process and apparatus A timer survey system performing the steps of: placing a first reference point and a second reference point on a tree trunk, wherein an actual distance between the first reference point and the second reference point is a known distance, “A1”; capturi... | 01/01/2008 |
| 7259842 | Optical inclinometer The invention relates to an optical inclinometer, in which radiation is emitted form a radiation source. After passing through a receptacle containing at least one first medium, said radiation is reproduced in a camera. Information concerning the inclination of the ... | 08/21/2007 |
| 6141091 | Surveying apparatus The present invention provides a surveying apparatus adapted to be worn on the head of user. The surveying apparatus contains components for optical sighting, distance measurement, bearing determnination, position fixation, and signal processing. The dist... | 10/31/2000 |
| 5999252 | Method for marking workpieces A method for laser marking semiconductor wafers wherein marking errors attributable to the laser marking tool are measured for each of the anticipated marking fields. A weighted average error is then calculated, and a correction based thereon is entered i... | 12/07/1999 |
| 5940172 | Surveying apparatus The present invention provides a surveying apparatus adapted to be worn on the head of user. The surveying apparatus contains components for optical sighting, distance measurement, bearing determination, position fixation, and signal processing. The dista... | 08/17/1999 |
| 5929984 | System and method for generating multiple parallel beams and planes A laser system is provided for precisely locating points in space relative to a reference plane. The system includes at least one laser generator capable of sweeping a plurality of mutually perpendicular laser planes and/or one laser plane and one laser b... | 07/27/1999 |
| 5872623 | Massively parallel detection The invention provides apparatuses for detecting light from, for example, closely spaced detection sites. In one embodiment, the invention provides an apparatus for measuring the amount of light emitted from or transmitted through two or more detection si... | 02/16/1999 |
| 5796488 | Optical target alignment and technique The invention resides in a method of measuring position and angle comprising the steps of providing a tooling telescope, a transparent target surface and an alignment target having a light reflecting face confronting the telescope. The light reflecting fa... | 08/18/1998 |
| 5557403 | System and method for measuring crazing in a transparency A system for measuring crazing in a transparency is described which comprises one or more light sources disposed near a first surface of the transparency for projecting light rays through the transparency at the portion thereof having a crazed condition, ... | 09/17/1996 |
| 5161242 | Automated repeating sextant (ARS) The automated repeating sextant (ARS) is a navigational instrument suitable for air, sea and land use. The ARS uses an electronic artificial horizon, an A/D conversion board and either microchips or a computer, with software, to read a celestial body's al... | 11/03/1992 |
| 4988193 | Method and apparatus for measuring incident light angle relative to level Apparatus operable in accordance with the method of the present invention for measuring the angle of incidence of a light beam or plane relative to level comprises a photodetector array for sensing the light and a level mirror preferably comprising a pool... | 01/29/1991 |
| 4908948 | Precision optical square instrument A precision optical square instrument for accurately determining lines and planes respectively perpendicular to reference lines and planes comprising, a substantially hollow housing containing first and second reflectors arranged at different vertical pos... | 03/20/1990 |
| 4462684 | Single wheel celestial navigator Single wheel celestial navigational instrument and method of determination of local latitude and local hour angle of Aries by a single sighting on the night sky. Greenwich hour angle of Aries and latitude are obtained by simple reference to the instrument... | 07/31/1984 |
| 4449817 | Celestial navigator Celestial navigational instrument and method of determination of local latitude and local hour angle of Aries by a single sighting on the night sky. Greenwich hour angle of Aries and latitude are obtained by simple reference to the instrument's scales and... | 05/22/1984 |
| 4413906 | Passive optical rangefinder/sextant having search capability Uniquely integrating a search mirror and a deflection mirror with a passive ptical rangefinder and a remote sextant, enhances the operation of both devices. The improved rangefinder/sextant provides day/night 360° azimuthal and at least -5° to about 60°... | 11/08/1983 |
| 4352556 | Reflector for electrooptical distance measurement A reflector for electrooptical measurement of the distance between a first (3) and a second point (4) is arranged with a right angle sighting device (13) in a common case (8). The reflector (6) may thus be set up at a point (5) where the directions to the... | 10/05/1982 |
| 4294541 | Bi-periscopic instrument for use in determining terrestrial positions through celestial observation An instrument having an annular body and a pair of independently and selectively-adjustable periscopes for transmitting the superimposed images of two reference stars (or other selected celestial objects) to a viewer for the purpose of directing orientati... | 10/13/1981 |
| 4173413 | Navigation instrument An instrument for taking bearings of objects, particularly for use in coastal navigation, has a main body with one or two arms pivoted to the body. A first object is sighted through the main body, over the top of a plane mirror. Once a zero line of the ma... | 11/06/1979 |
| 4162124 | Passive optical rangefinder-sextant A passive opto-electric rangefinder with remotely controllable index mirr independently rotatable about normal axes, each axis perpendicular to the line-of-sight.... | 07/24/1979 |
| 4009960 | Passive optical rangefinder The present invention provides within a ship, a passive electro-optic dev for providing a measurement of the range, together with a positively identifiable image of an approaching ship or object day or night on a CRT, with the range displayed digitally o... | 03/01/1977 |
| 3992106 | Error cancelling scanning optical angle measurement system An attitude determining system for vehicles, such as spacecraft or for ground-based environments measures the angle between a reference and the line-of-sight to a star or other celestial object of known position or to aircraft and missiles. The system inc... | 11/16/1976 |
