Abstract: A laser surveying instrument, comprising a rotating unit for projecting a laser beam by rotary irradiation, a main unit for rotatably supporting the rotating unit, and a sealing means for sealing between the rotating unit and the main unit, wherein the sealing means comprises annular ridges formed on the main unit concentrically to the rotation center of the rotating unit, and annular grooves formed on the rotating unit so that the annular ridges are engaged in the annular grooves and gaps are formed between the annular ridges and the annular grooves, the annular ridges and the annular grooves being arranged concentrically to each other and disposed in double arrangement, and wherein the sealing means further comprises a route bent and crooked in a radial direction by the gaps, and a cavity disposed at least at one point along the route and having larger volume than the volume of the gap.

Abstract: A construction laser with at least one laser beam (4) defining a plane (3) has a laser unit (6) which is tiltable with respect to a housing (5) around at least one swiveling axis (9a) and includes at least one leveling sensor (10a) which is sensitive to the swiveling axis (9a) for a highly precise orientation to the gravitational field (G), and at least one tilt sensor (11a) which is sensitive to the swiveling axis (9a) for direct measurement of an inclination angle [alpha] relative to the gravitational field (G).

Abstract: A leveling method in a device main unit with tilt sensors, wherein said method comprises a step of obtaining a response delay of said tilt sensors in advance, a step of tilting said device main unit in a first direction so that said tilt sensors detect a first 0 point, a step of tilting said device main unit in a second direction reverse to said first direction so that a second 0 point is detected after said first 0 point has been detected, a step of obtaining a time up to the detection of both 0 points, a step of calculating a driving time to tilt in the first direction further from said second direction based on said time and said response delay, a step of tilting said device main unit for the driving time, a step of maintaining tilting condition for a predetermined time after tilting and a step of converging by performing leveling operation based on detection result of said tilt sensors after the predetermined time passing.

Abstract: The present invention discloses a laser alignment device which has a simple structure, easy operation and economical utility, and which includes a casing, a laser emitting unit that is mounted in the casing and may emit a planar laser beam, a first mounting plane and a second mounting plane connected fixedly to the laser emitting unit, a first and a second electronic obliquity sensing units fixed on the first and the second mounting planes respectively, an automatic adjusting means, a first and a second surfaces both of which may contact with the settling surface of the laser alignment device, said first surface being connected moveably with said laser emitting unit through said automatic adjusting means, and a control circuit connected electrically with said first and second obliquity sensing units and said automatic adjusting means, at least the first one of said first and second obliquity sensing units being a double shaft obliquity sensing unit.

Abstract: A line generating device generates two fan-shaped beams of light at an angle to each other, and projects the beams onto an adjacent surface, where the beams are visible as lines on the surface. A user has access to the intersection of the lines, so that the intersection can be marked or otherwise used in combination with the lines, such as in aligning objects.

Abstract: The invention related to a method for checking or calibrating the angle-dependent alignment of a reference structure on a high-precision test-piece. After arrangement of the test-piece on a retainer piece, a pre-alignment of an optical unit and/or the reference structure of the test-piece is carried out, such that the test-piece beam is at least partly incident on a detector and generates at least one point there. The position of the at least one point on the detector is evaluated by means of a control/regulation unit.

Abstract: A device for depicting a linear optical marking (36, 38) in a room, including a housing (11) with a light source (16, 18) that emits the light along an optical axis (15, 17), as well as a lens (28, 30) that both reflects the light and allows it to pass through, that is arranged in front of the light source and through which the optical axis extends. In order to be able to illuminate an area of the room with simple design measures, i.e.

Abstract: A laser level is adapted to direct a laser path against a working surface. The level comprises a base, the base comprising at least one pair of opposing edges, the base adapted to be positioned relative to the working surface such that each of the opposing edges is adjacent to the working surface. The level comprises an adhesive layer, the adhesive layer being situated on the base so as to removably affix the base on the working surface without damaging the working surface. The level comprising an activating switch, the switch being located on the level at a location offset from the laser path.

Abstract: 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 pivotally mounting the support platform relative to the base frame. A tilting motor is provided to the base frame and has a pair of output shafts influencing the orientation of the support platform, whereby rotation of the output shafts in a first direction tilts the support platform only along a first axis, and rotation of the output shafts in a second direction tilts the support platform only along a second axis. A power supply is provided for driving the tilting motor.

Abstract: A multi-purpose strap for use with a laser tripod having a head portion and a base portion includes a flexible member, a first coupling component located at an end of the flexible member, and a second coupling component located at an opposite end of the flexible member. The flexible member when in a first configuration is adaptable to be coupled to the head portion using the first coupling component. The flexible member in a second configuration is also adaptable to be coupled to the tripod base using the second coupling member to form a shoulder strap.

Abstract: To obtain an accurate survey value even if a centering operation is simplified without using a specific target. When a survey point S is displayed on the screen of a display 20 as an image picked up by a CCD camera 38 in a process to perform an operation for placing a surveying instrument 10 directly above the survey point S, a centering operation is ended, and the survey point S is specified as a true centering point. Accordingly, coordinates (Xs, Ys) of the survey point S in which the instrument center point 0 is defined as an origin are calculated as a decentering amount (i.e., dislocation) of the survey point S with respect to an instrument center point 0.

Abstract: A line generating device generates two fan-shaped beams of light at an angle to each other, and projects the beams onto an adjacent surface, where the beams are visible as lines on the surface. A user has access to the intersection of the lines, so that the intersection can be marked or otherwise used in combination with the lines, such as in aligning objects.

Abstract: A construction laser having a housing and a tilt part positioned within the housing. The tilt part includes a laser unit for generating a laser beam and a deflector for deflecting the laser beam. The tilt part is adjustable relative to the housing by an actuation element. The actuation element includes at least one piezo actuator that is controlled by control electronics.

Abstract: A method of monitoring the location, and the orientation of a machine element, and apparatus for monitoring and controlling the operation of the machine include a robotic total station and a plurality of targets in known positions relative to the machine element. The total station, located at a known location near the machine element, repeatedly, successively determines the location of each target. Acquisition and re-acquisition of the targets is aided by stored data regarding the prior locations and movements of the targets. Further, active targets may be used to facilitate re-acquisition. The operation of the machine is controlled based upon the location and orientation of the machine element.

Abstract: The invention relates to a support frame positioning a laser beam level and comprises: a first support module 1 inclusive a reference element 10 that can be positioned against a planar surface and enganging elements 11 located in a longitudinal direction A1 to cooperate with a second support module 2 displaceable relative to the first support module 1, bracing means 22 on the second support module 2 to support a laser beam type level 3 and a motor 25 to power a drive shaft in either of two directions of rotation of at least one element translatable along the first support module 1, and a remote control for said motor 25. The support frame may be positioned in height on walss and allows automatically positioning the laser beam in the continuous and progressive manner FIG. 1.

Abstract: The present invention provides a surveying instrument (20), comprising a surveying instrument main unit (21) which projects a measuring light to an object to be measured and measures a position based on a reflection light from the object to be measured and an operation device (67) which is removably attached on the surveying instrument main unit, wherein the surveying instrument main unit comprises a distance measuring unit (54) and (55) for emitting the measuring light and for measuring a distance, an image pickup unit (51) and (53) for acquiring an image, a reflection mirror (45) rotatably mounted and used for directing the measuring light toward the object to be measured, for directing the reflected light from the object to be measured toward a light receiving unit, and for directing the image in a projecting direction toward the image pickup unit, a detecting means (31) for detecting a rotating position of the reflection mirror, and a control unit (74) for controlling at least the distance measuring unit,

Abstract: The present invention relates to a laser line beam emitting apparatus having a laser beam emitter from which laser beam flux are emitted and an optical broad element for broadening the laser beam flux to predetermined directions in which objects to be emitted reside for drawing of a straight reference line thereon. The apparatus's housing has an improved dust protective covering fitted into an outlet thereof such that the reflected, broadened laser beam flux from the covering through the cylindrical rod lens of the laser beam emitter becomes no ghost. Preferably, such covering has a curvature formed on its inner surface such that the reflected, broadened laser beam flux therefrom through the laser beam emitter return to the inside of the apparatus.

Abstract: A line generating device may include a housing having a bottom surface, a top surface, a front surface connecting the top and bottom surfaces, a rear surface connecting the top and bottom surfaces, and a side surface connecting the top and bottom surfaces, a support assembly mounted within the housing. In addition, the device may include a light source mounted on the support assembly, and a lens for receiving light and projecting the light in the shape of a fan within a plane. The light plane exits through the front surface. The device is disposable on a reference surface on the bottom, rear and side surfaces.

Abstract: A device for assisting a user in marking an overhead surface to correspond with a mark on a surface below includes a substantially hollow housing having pressurized gas containers received therein. The pressurized gas containers are in communication with a projection barrel extending upwardly from the housing. A lower laser module is positioned on the lower surface of the housing for projecting a laser beam downwardly onto a target mark on an underlying surface. The paint ball projection barrel is coaxial with the lower laser module such that when the laser beam is directed toward the target mark, a paint ball can be projected upwardly to produce an overhead mark that is axially aligned with the target mark.

Abstract: An adapter providing increased versatility to a laser alignment tool is disclosed. Accessories of the adapter are disclosed for use with a laser alignment tool which may or may not be self-leveling. The accessories include one or more laser reference diffraction elements, effective to receive an incoming laser reference and produce a laser reference deviated a predetermined angular amount, and various attachment features.

Abstract: 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 pivotally mounting the support platform relative to the base frame. A tilting motor is provided to the base frame and has a pair of output shafts influencing the orientation of the support platform, whereby rotation of the output shafts in a first direction tilts the support platform only along a first axis, and rotation of the output shafts in a second direction tilts the support platform only along a second axis. A power supply is provided for driving the tilting motor.

Abstract: A laser levelling apparatus includes a platform, a base assembly, a body assembly, a head assembly and a laser assembly. The body assembly is rotatable about a body axis relative to the base assembly, the head assembly is rotatably supported by the body and rotatable about a head assembly axis transverse to the body axis and the laser assembly supported by the head assembly and rotatable about a laser assembly axis which is transverse the head assembly axis. The laser assembly has a laser diode and focusing elements and laser collimator the laser beam with the laser assembly. The head assembly is mounted between a first shaft end mounted at a first position of the body and a second shaft end mounted at the second position of the body opposed to the first position. A head assembly collimator is used to adjust the axis of rotation of the head assembly. A base assembly leveller is used to adjust the level of the base relative to the platform in at least two transverse directions.

Abstract: A rotor shaft is supported in a housing of a rotor assembly for a laser level. Bearings support the rotor shaft for rotation relative to the housing. An adhesive fixes an outer race of at least one of the bearings in position between the rotor shaft and the housing. The adhesive is a low viscosity, quick setting anaerobic adhesive, which when cured prevents angular drift of the shaft relative to the housing by eliminating the clearance that would have existed between the outer race and the housing.

Abstract: A rotational construction laser includes a housing (17) a laser unit (4) located in the laser housing (17), a device (5) for rotating, at least segmentwise, a laser beam (2) of the laser unit (4) within a rotational plane (R) of a rotational member (6) in which the rotating device (5) is supported for rotational about a rotational axis (A) that intersects a beam axis (S) of the rotatable laser beam (2), and an arrangement for inclinably supporting the rotation axis (A) in at least one pivot plane (E1) and including a mounting frame (3) and a universal ball joint support (7) arranged in the mounting frame (3), with the rotating device (5) being located in a central point (M) of a universal ball joint (8) supported in the universal ball joint support (7).

Abstract: A surveying instrument includes a surveying instrument body rotatable about each of a vertical axis and a horizontal axis; and a first collimator optical system and a second collimator optical system each of which is positioned in the surveying instrument body to collimate the surveying instrument relative to a survey point, a viewing angle of the second collimator optical system being smaller than a viewing angle of the first collimator optical system. A first collimating operation is performed with the first collimator optical system before a second collimating operation is performed with the second collimator optical system.

Abstract: A level (100) includes a light source (10) and a cone-shaped reflecting element (40) with reflecting surface for reflecting light beam from the light source to produce a circumferential leveling plane. The light source is arranged adjacent to the peak of the cone-shaped reflecting element, and on the center axis of the cone-shaped reflecting element.

Abstract: A laser centering device (30) that is attached to a survey apparatus by replacing it with a centering telescope optical system is formed of an inner barrel (32) that fixes a pentagonal prism (40) at one end thereof and is internally provided with a laser beam source (42), an intermediate barrel (34) that moves the inner barrel in the axial direction and fixes it so as to adjust the position thereof, and an outer barrel (36) that turns the intermediate barrel around the axis and fixes it so as to adjust the angle thereof, and at the same time, is fixed at the portion (38) for fixing the centering telescope optical system of the survey apparatus (1). The invention provides a laser centering device for which the emission direction of a laser beam is simply adjusted.

Abstract: A laser level disposable on a reference surface includes a housing, a pendulum pivotably connected to the housing, a first laser diode disposed on the pendulum for emitting a first laser beam along a first path, a first lens disposed on the pendulum in the first path for converting the first laser beam into a first planar beam, the first planar beam forming a first line on the reference surface, a second laser diode disposed on the pendulum for emitting a second laser beam along a second path, and a second lens disposed on the pendulum in the second path for converting the second laser beam into a second planar beam, the second planar beam forming a second line on the reference surface, wherein the first and second lines are substantially perpendicular and non-intersecting.

Abstract: A laser level disposable on a reference surface includes a housing, a laser diode disposed within the housing for emitting a laser beam along a path, a lens disposed in the path for converting the laser beam into a planar beam. The planar beam thus forms a line on the reference surface. The laser level also includes an electronic distance measurement circuit disposed within the housing for measuring distance. The distance measurement circuit including a display for showing the measured distance.

Abstract: A light detector which includes a housing having front and rear walls, a light receiving section disposed on the front wall, and displays disposed on the front and rear walls for showing the location of received light relative on the light receiving section. Also disclosed is a laser level including a motor, a shaft driven by the motor, a housing fixedly disposed on the shaft, the housing having a bore therein, a barrel pivotally connected to the housing, a laser diode module disposed within the barrel, and a screw disposed on the housing and contacting the barrel for adjusting the pivotal position of the barrel.

Abstract: The present invention comprises an illumination portion (11), which is disposed in a surveying machine body (8), for illuminating measurement light toward a reflector (2), a light receiving portion (12), which is disposed in the surveying machine body (8), having an image sensor for receiving a reflection light image (M0) of the measurement light illuminated toward the reflector (2), arithmetic means (37) for calculating a position in an area (Q2) of the image sensor (27) for the reflection light image (M0) from the reflector, and a rotation mechanism for rotating the survey machine body (8) so as to position the reflector (2) on a light receiving optical axis (O2) of the light receiving portion (12) based on the position obtained by the arithmetic means (37), and a light receiving area (Q3) which is a smaller area than the area (Q2) of the image sensor (27) and has the light receiving optical axis (O2) as a center is provided in the area (Q2) of the image sensor (27).

Abstract: A light leveling device includes a stationary light instrument received in a housing, and a rotatable light instrument rotatably attached to the housing, to allow the rotatable light instrument to be rotated and adjusted relative to the housing and the stationary light instrument. A carrier is rotatably secured to the housing to support the rotatable light instrument, and a motor may be coupled to the carrier to rotate and adjust the carrier and the rotatable light instrument relative to the housing automatically. A remote control device may further be used to remotely control the motor.

Abstract: A light detector which includes a housing having front and rear walls, a light receiving section disposed on the front wall, and displays disposed on the front and rear walls for showing the location of received light relative on the light receiving section. Also disclosed is a laser level including a motor, a shaft driven by the motor, a housing fixedly disposed on the shaft, the housing having a bore therein, a barrel pivotally connected to the housing, a laser diode module disposed within the barrel, and a screw disposed on the housing and contacting the barrel for adjusting the pivotal position of the barrel.

Abstract: A laser level disposable on a reference surface includes a housing, a pendulum pivotably connected to the housing, a first laser diode disposed on the pendulum for emitting a first laser beam along a first path, and a lens disposed on the pendulum in the first path for converting the first laser beam into a first planar beam, the first planar beam forming a line on the reference surface.

Abstract: A level. A projected plane is generated substantially parallel to a reference plane by a light source rotatably emitting light. A main shaft, having a rotary portion and a pair of protrusions and connecting to the light source, is perpendicular to the projected plane. A universal joint is disposed in a housing with the main shaft rotatably passing therethrough. A level sensor detects inclination of the projected plane deviated from the reference plane and outputs an adjustment signal. An adjustment mechanism has a first movable member and a second movable member crossing each other. The first movable member impels one protrusion along a first axis, and the second movable member impels one protrusion along a second axis perpendicular to the first axis according to the adjustment signal. The main shaft is rotated around the universal joint until perpendicular to the reference plane with the projected plane parallel thereto.

Abstract: A line producing system includes an input beam of radiant energy that enters a side of a low cost, radiant energy altering device. The radiant energy emerges from the light altering device radiating in a nearly 360 degree disc pattern forming a ring of ever expanding light.

Abstract: The present invention provides a laser sighting device, which comprises a tilt detecting device having a liquid member for forming a free liquid surface and a fixed reflection member fixedly mounted, the tilt detecting device being used for detecting angular deviation between the free liquid surface and the fixed reflection member, a main unit for accommodating the tilt detecting device, and a laser beam irradiation unit removably mounted on the main unit.

Abstract: A survey monument comprises a conventional water hydrant with survey indicia or markings attached thereto. The survey indicia can be carried for example on a plate mounted on a flange bolt or attached to the operating nut of the hydrant. These survey monuments can be expanded upon and/or maintained in co-ordination with the expansion and maintenance of a municipality's water supply system. The hydrants can also be utilized in connection with any geographical information system to provide known reference points. The hydrants can also be utilized in connection with GPS devices to assist in localizing, initializing and calibrating the same.

Abstract: A laser alignment device provides horizontal and vertical reference planes, lines, and points. The alignment device includes a pendulum assembly that supports a laser beam source assembly, two reflectors, and two motors. The laser beam source directs beams onto the reflectors—producing a horizontal reference beam and a vertical reference beam. Each reflector is rotated by one of the motors. Continuous rotation generates a reference plane; dithering generates a reference line, and no movement results in a reference point. The pendulum assembly includes a coarse pendulum that supports a fine pendulum, as well as the rotating motors and beam reflectors. The coarse pendulum roughly levels the alignment device. The fine pendulum supports the laser beam source assembly and brings the alignment device to a level position. The laser alignment device also includes a motor control system that enables users to accurately position the device's references.

Abstract: A device (10) for clamping and unclamping a standing prism pole (11) within a surveying instrument (13). A pair of opposing vise or jaw members (24, 25) are disposed with a geometrical configuration (18) forming a frame (19) having a cavity (20), the one vise (24) within cavity (20) fixedly mounted to frame (19), the other vise (25) within cavity (20) slidably movable towards and away from vise (24), and by which the standing prism pole (11) is clamped and unclamped by the jaw members (24, 25). A spacer arm (34) connects frame (19) to a support leg (37) of instrument (13). At the bottom of leg (37) a carrying handle (39) is connected for ease of moving instrument (13) from one point to another in either collapsed or uncollapsed mode for instrument (13).

Abstract: A leveling system including a first post for contacting an upper surface, a second post for contacting a lower surface, wherein one of the first and second posts telescopes within the other of the first and second posts, a locking assembly disposed on the one of the first and second posts, and a mount assembly for supporting a laser instrument.

Abstract: A survey point indicating instrument, for recognizing a line of sight visually, includes a collimating lens, two light sources being positioned so that optical axes of the two light sources intersect each other on an optical axis of the collimating lens at a focal point of the collimating lens; a driving circuit for controlling light emissions of the two light sources independently from each other; and a light shield plate having a slit, and positioned between the focal point and the two light sources so that light rays emitted from each of the two light sources to travel in an area between the optical axes are allowed to pass through the slit while other light rays emitted from each of the two light sources are cut off by the light shield plate to prevent the other light rays from traveling outside the area between the optical axes.

Abstract: A surveying instrument includes a surveying instrument body rotatable about each of a vertical axis and a horizontal axis; and a first collimator optical system and a second collimator optical system each of which is positioned in the surveying instrument body to collimate the surveying instrument relative to a survey point, a viewing angle of the second collimator optical system being greater than a viewing angle of the first collimator optical system. A first collimating operation is performed with the first collimator optical system after a second collimating operation is performed with the second collimator optical system.

Abstract: The present invention discloses a laser-plumbing leveler with adjustable height of the horizontal line, which comprises a laser emitting device, a laser line (plane) projecting optical system, and a laser line (plane) rotating and/or moving unit, wherein the laser line (plane) projecting optical system comprises a horizontal laser unit, a vertical laser unit and/or inclined laser unit and so forth. The laser-plumbing leveler according to the invention can be used in building decoration or the like for positioning at different height in horizontal, vertical and inclined directions, and has the advantages of easy use, reliable leveling, simple construction and low price.

Abstract: The present invention provides apparatus and a method for projecting an indication of alignment. The invention features forming a first output beam, and a second output beam that is substantially perpendicular to the first output beam. The first output beam indicates level, the second output beam indicates plumb, and the first and second output beams together indicate square. An error indicator indicates an error in the accuracy of the first and second output beams as indicators of level and plumb respectively. The error indicator can be deactivated, such that the first and second output beams together can be used at least to indicate square.

Abstract: A laser level disposable on a reference surface includes a housing, a laser diode disposed within the housing for emitting a laser beam along a path, a lens disposed in the path for converting the laser beam into a planar beam. The planar beam thus forms a line on the reference surface. The laser level also includes an electronic distance measurement circuit disposed within the housing for measuring distance. The distance measurement circuit including a display for showing the measured distance.

Abstract: The present invention provides a laser sighting device, which comprises a tilt detecting device having a liquid member for forming a free liquid surface and a fixed reflection member fixedly mounted, the tilt detecting device being used for detecting angular deviation between the free liquid surface and the fixed reflection member, a main unit for accommodating the tilt detecting device, and a laser beam irradiation unit removably mounted on the main unit.

Abstract: A laser projection apparatus has an adjustment platform having a base seat, a platform portion that is adjustably coupled to the base seat, and an adjustment mechanism that is operatively coupled to the base seat and the platform portion to adjust the inclination angle of the platform portion with respect to the base seat. The apparatus also has a frame body that is connected to the adjustment platform, and a column that is suspended by the frame body and which is separated from the adjustment platform by a distance. The apparatus further includes a first projection light-source mechanism that is connected to the column and which projects a straight light that is parallel to a central axis, and a second projection light-source mechanism which is connected to the column and which projects a light ring that is transverse to the central axis.

Abstract: 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 element by which the laser beam and the target beam can be coupled into a target axis impinging vertically on the target point. In this way, an exact orientation of the geodetic instrument can be achieved under all light conditions. The geodetic instrument retains its compact dimensions. In addition, a laser in a lower hazard class can be used.

Abstract: Apparatus (4) for converting an optical theodolite (2) into a laser theodolite, which apparatus comprises a laser diode adapter (6) for connection to the optical theodolite in place of an eyepiece of a telescope (8) of the optical theodolite, and driver means (10) for the laser diode adapter (6); the laser diode adapter (6) comprising a housing (12), a laser diode (14); a holographic image reshaping lens (51), and a focusing lens (52) in the housing (12), and an externally threaded male portion (16) for screwing into the telescope (8) in place of the eyepiece; and the driver means (10) having securing means (18) for securing the driver means (10) to the optical theodolite (2) remote from the laser diode adapter (6).