Class 356/148 - Artificial reference

Subclass of Class 356 - Optics: measuring and testing
Definition: Subject matter including, for the purpose of establishing
No. of patents: 34
Last issue date: 05/08/2007

Number	Title	Issue Date
7213343	Dual axis single motor platform adjustments system An arrangement for use in a light beam projection device for adjusting an orientation of a projected light beam is disclosed. The arrangement comprises a base frame, a support platform adapted to set the orientation of the projected light beam, and a pivot member pi...	05/08/2007
7148962	Device for determining the position and direction of channel inlets and channel outlets in sewer manholes The invention relates to a device for determining the position and direction of channel inlets and channel outlets in wastewater systems that, in the horizontal plane, lead into and out of sewer manholes. To this end, a device was created that is provided in the for...	12/12/2006
6938350	Apparatus for producing a reference plane The present invention provides an apparatus and method for projecting a reference plane. The invention features emitting a light beam, splitting the light bean into two or more resulting beams, and converting the resulting beams into respective projected lines. The ...	09/06/2005
6909551	Side by side laser level device A laser level includes a pair of level units arranged side by side and disposed in different oriented directions. Each laser level includes a laser light source adapted to emit a laser beam, a beam splitter adapted to simultaneously split the beam into first and sec...	06/21/2005
6724471	Arrangement for the vertical orientation of a geodetic instrument An arrangement for the vertical orientation of a geodetic instrument over a ground point, comprises an optical observation device for visual sighting of the ground point with a target beam, a laser device for generating a laser beam, and an optical in-coupling eleme...	04/20/2004
6625895	Servo-controlled automatic level and plumb tool A method and apparatus for leveling at least one output light beam in a construction tool. One embodiment of the apparatus includes a laser optical assembly for producing output light beams that define plumb, level, and right angle beams for use in constr...	09/30/2003
6292258	Laser receiver with out-of-plumb indication and compensation A laser receiver is provided that is capable of providing an accurate indication of laser receiver tilt and correcting a generated elevation signal based upon the indicated laser receiver tilt. In accordance with one embodiment of the present invention, a...	09/18/2001
6177987	Laser level A laser level includes a transparent container, a buoy with a built-in laser component, and a support frame. The center of gravity of the buoy is always at the center of the buoy. One end of the buoy emits horizontal laser beams, the other end thereof emi...	01/23/2001
6141147	Optical unit for image projection and tool incorporating same An optical unit for projecting an image including first and second locating lines for substantially eliminating the introduction of visual parallax error. In one preferred form, the optical unit is incorporated into a machine for performing a forming oper...	10/31/2000
6104480	Angle measuring device An angle measuring device comprising two legs, a hinge supporting the legs turnably relative to one another about a common axis, at least one rotor, drive unit driving the rotor rotatably about a rotary axis coincided with the turning axis, reference poin...	08/15/2000
6104479	Laser system The present invention relates to a laser surveying apparatus capable of forming a measuring reference line and a reference plane by laser light. In the laser surveying apparatus, a mount unit is rotated about a vertical axis, a laser projection unit is ro...	08/15/2000
6073354	Plumb laser beam generator with floating telescope An instrument for use in alignment, plumb and leveling functions includes a laser diode projecting a beam through a liquid contained in a vessel. Floating in the liquid is a compensator float which includes telescope optics so as to diminish the angle of ...	06/13/2000
6057916	Automatic inclination corrector and inclination sensor using an automatic inclination corrector An automatic inclination corrector and an inclination sensor using the automatic inclination corrector free from the temperature, for optical instruments. A transparent container 3 seals silicon oil C having a free liquid surface C1. A collimation lens 2 ...	05/02/2000
5847820	Laser apparatus for sensing rotational orientation and levelness A laser apparatus is provided for sensing rotational orientation or the degree of levelness. The apparatus includes a photosensitive cell and a diode laser directing a laser beam toward the photosensitive cell. Both the diode laser and the photosensitive ...	12/08/1998
5684579	Automatic tilt angle compensator The automatic tilt angle compensator of the present invention includes a liquid sealing container with a transparent liquid sealed therein to form a free liquid surface, a light projecting system for projecting light beam to the free liquid surface at a g...	11/04/1997
5680208	Gravity oriented laser scanner A laser scanner 50 includes a laser 76 affixed to a pendulum 66 with a damper 80 for damping the movement of the pendulum 66. The laser scanner 50 is controllable through a remote control 62 for positioning the laser beam as desired. Both horizontal and v...	10/21/1997
5513001	Tilt angle automatic compensator in all directions A tilt angle automatic compensator used for a device requiring verticality or horizontality is disclosed. The automatic compensator comprises a container 4 where a transparent liquid to form free liquid surface 1 is sealed, a light projection system for p...	04/30/1996
5392112	Inclination angle metering apparatus An inclination angle metering apparatus is arranged such that a beam from a light source is split into two beams by a half-mirror provided in a light path between the light source and the surface of a liquid. One beam is reflected by the liquid surface fa...	02/21/1995
5126561	Angle displacement detector for optical image stabilization device In an angle displacement detector for an optical image stabilization device including a tubular casing which has a chamber containing a sealed-in liquid, a floating body which is disposed within the sealed-in liquid and which is carried in such a way as t...	06/30/1992
5112126	Apparatuses and methods for making geophysical measurements useful in determining the deflection of the vertical A non-magnetic apparatus is disclosed for finding the deflection of the vertical. That apparatus has a device for finding an instrument spatial angle between a reference direction and an instrument characterization direction, and a device for finding a de...	05/12/1992
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
4869590	Geodetic instrument The invention relates to a geodetic instrument with a telescope, an objective with a reticle in the focal plane, a clinometer and optoelectronic elements with the objective of avoiding faulty measurements due to a vibrating or oscillating target image, as...	09/26/1989
4811062	Method for aligning first and second objects relative to each other and apparatus for practicing this method In a method for aligning first and second objects relative to each other, according to this invention, the first and second objects are arranged opposite to each other, and are aligned in a direction perpendicular to their opposing direction. A grating pa...	03/07/1989
4681438	Automatic compensator for compensating collimation error due to two-directional inclination in surveying instruments An optical plummet mechanism for compensating an error due to an inclination of a surveying instrument comprises a first pendulum suspended in the instrument body interior, a second pendulum suspended in a perpendicular relation to the first pendulum, a f...	07/21/1987
4629321	Grade setting and calibration arrangement for laser beam projection device An arrangement for use in a laser beam projection device for controlling the orientation of a support frame upon which a laser beam source is mounted includes a base frame, a support frame, and a pivot for mounting the support frame on the base frame. A l...	12/16/1986
4291978	Apparatus for automatically determining the position at which a beam of light impinges on a target A rotating target contains an appropriately shaped section of photoelectric material which detects the position of a beam of light which is incident on the target. The position of the beam is determined in terms of its distance from the center of rotation...	09/29/1981
4172662	Eyepiece for measurement of lengths and angles by a microscope An eyepiece for use on a microscope when lengths and angles are to be measured. Two glass plates extending perpendicular to the optical axis of the eyepiece are spaced axially from each other to form between them a chamber containing a steel ball which is...	10/30/1979
4171907	Electro-optic distance measuring device A device for measuring distances to a target includes electronic circuits for generating a light which is amplitude modulated by three selectable frequencies. Also included are optics for focusing the amplitude modulated light onto the target, and for rec...	10/23/1979
4136962	Apparatus for orienting and maintaining the orientation of construction equipment An apparatus for orienting and maintaining the orientation of laser and similar construction equipment in a predetermined orientation with respect to a horizontal plane comprises superimposed first, second and third support plates, each of which is prefer...	01/30/1979
4135823	Optical assembly for generating light beams accurately at right-angles to each other An optical assembly is provided which comprises a light source, preferably a laser, and a particularly compensated prism unit, the laser and the prism unit being mounted on a common holder or base. The beam emitted from the laser is reflected 90° by the ...	01/23/1979
4119382	Self-leveling construction alignment laser The specification discloses an improved system for projecting and utilizing a light beam as a reference line for construction purposes. The system includes a light beam projection device mounted in a housing. A light path compensator is positioned within ...	10/10/1978
4043679	Self-leveling construction alignment laser The specification discloses an improved system for projecting and utilizing a light beam as a reference line for construction purposes. The system includes a light beam projection device mounted in a housing. A light path compensator is positioned within ...	08/23/1977
4040752	Laser unit with a laser beam automatically aligned to the vertical direction Laser unit for directing a laser beam in a strictly vertical direction, comprising a laser proper having a substantially vertical axis, an afocal system, an optical device for automatically correcting the verticality of the laser beam, and a base structur...	08/09/1977
4021662	Laser target simulator The laser target simulator of the invention comprises two point sources of light energy (LEDs) aimed at a section of concave spherical mirror which collimates the light energy and projects it across the full aperture of a laser seeker. One of the point so...	05/03/1977

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Class 356/148 - Artificial reference