US20050166408A1 - Laser level device - Google Patents
Laser level device Download PDFInfo
- Publication number
- US20050166408A1 US20050166408A1 US10/863,225 US86322504A US2005166408A1 US 20050166408 A1 US20050166408 A1 US 20050166408A1 US 86322504 A US86322504 A US 86322504A US 2005166408 A1 US2005166408 A1 US 2005166408A1
- Authority
- US
- United States
- Prior art keywords
- laser
- light
- laser level
- level
- degrees
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
- G01C15/004—Reference lines, planes or sectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S33/00—Geometrical instruments
- Y10S33/21—Geometrical instruments with laser
Definitions
- the present invention relates to a laser level, and particularly to a laser level capable of level indication along multi directions in a circumferential area simultaneously.
- U.S. Pat. No. 3,771,876 is directed to a laser apparatus for producing a plane or conical optical reference surface.
- the device includes a pendulum hanging from a flexible suspending member, with the pendulum containing the light source so as to be self-leveling.
- a prism is used for reflecting the beam out of the device 90 degrees from the entry angle of the beam from the pendulum.
- the prism is mounted on a vertical axle which can be caused to be rotated by a motor, whereby a conical reference surface is produced.
- the rotation of the prism is easy to cause the laser apparatus to shake, thereby adversely affecting the accuracy of the laser apparatus.
- a motor is employed to drive the prism to rotate, the volume of the laser apparatus is inevitably increased and the manufacturing cost is also increased.
- a first object of the present invention is to provide a laser level capable of level indication along multi directions in a circumferential area simultaneously.
- a second object of the present invention is to provide a laser level having a simplified configuration and a low manufacturing cost.
- a laser level in accordance with the present invention comprises a laser light source adapted to emit a laser beam, a beam-splitting unit comprising a first, a second and a third beam splitters, and a beam-outgoing unit.
- the first beam splitter splits the laser beam into two light beams along a first and a second directions.
- the second and the third beam splitters are respectively arranged in the first and the second directions to split the two light beams into four light beams along four different directions.
- the beam-outgoing unit disperses the four light beams to form four horizontal sector-shaped output beams.
- the four sector-shaped output beams together form an output beam having an angle approximately of 360 degrees.
- FIG. 1 is a perspective view of a laser level in accordance with the present invention.
- FIG. 2 is an optical diagram of the laser level.
- a laser level 100 in accordance with the present invention comprises a base 50 and an optical system retained in the base 50 .
- the optical system comprises a beam-incoming unit 10 , a beam-splitting unit 20 and a beam-outgoing unit 30 .
- the beam-incoming unit 10 includes a semiconductor laser module 11 as a light source and a diverging lens 12 .
- the diverging lens 12 is arranged in a position through which a laser beam emitted from the laser module 11 extends.
- the laser beam is adjusted by the diverging lens 12 to have a predetermined angle and a substantially circular cross section.
- the beam-splitting unit 20 includes a first beam splitter 21 , a second beam splitter 22 and a third beam splitter 23 . These three beam splitters 21 , 22 , 23 have the same structure and each has a beam splitting interface having an angle of 45 degrees. Each of the first, the second and the third beam splitters 21 , 22 , 23 is effective to split the laser beam into two simultaneous light beams along two perpendicular directions.
- the beam-outgoing unit 30 includes a first, a second, a third and a fourth collimating lenses 311 , 312 , 313 , 314 and a first, a second, a third and a fourth aspheric cylindrical lenses 321 , 322 , 323 , 324 .
- the first beam splitter 21 is arranged in a position through which the laser beam extends.
- the first beam splitter 21 is effective to split the laser beam into two simultaneous light beams along a first direction A and a second direction B perpendicular to the first direction A.
- the laser beam emitted from the laser module 11 is spread through the diverging lens 12 to have a predetermined angle and then is directed to the first beam splitter 21 .
- the first beam splitter 21 transmits a portion of the laser beam providing a first light beam in the first direction A and reflects a portion of the laser beam to provide a second light beam in the second direction B.
- the third beam splitter 23 is adjacent the first beam splitter 21 and arranged in a position through which the first light beam extends.
- the third beam splitter 23 transmits a portion of the first light beam in the first direction A and reflects a portion of the first light beam in a third direction C perpendicular to the first direction. Then, the portion of the first light beam in the first direction A transmits to the first collimating lens 311 and is collimated to form a first horizontal band-shaped light beam.
- the first aspheric cylindrical lens 321 finally disperses the first horizontal band-shaped light beam to form a first horizontal sector-shaped output beam having an angle greater than 90 degrees.
- the illumination of first horizontal sector-shaped output beam is uniformized by the first aspheric cylindrical lens 321 .
- the portion of the first light beam in the third direction C transmits to the third collimating lens 313 and is collimated to form a third horizontal band-shaped light beam.
- the third aspheric cylindrical lens 323 finally disperses the third horizontal band-shaped light beam to form a third horizontal sector-shaped output beam having an angle greater than 90 degrees.
- the illumination of third horizontal sector-shaped output beam is uniformized by the third aspheric cylindrical lens 321 .
- the second light beam transmits in a manner similar to that of the first light beam described above.
- the second beam splitter 22 is adjacent the first beam splitter 21 and arranged in a position through which the second light beam extends.
- the second beam splitter 22 transmits a portion of the second light beam in the second direction B.
- the portion of the second light beam in the second direction B transmits to the second collimating lens 312 and is collimated to form a second horizontal band-shaped light beam.
- the second aspheric cylindrical lens 322 finally disperses the second horizontal band-shaped light beam to form a second horizontal sector-shaped output beam having an angle greater than 90 degrees.
- the illumination of second horizontal sector-shaped output beam is uniformized by the second aspheric cylindrical lens 321 .
- the second beam splitter 22 reflects a portion of the second light beam in a fourth direction D perpendicular to the second direction B. Then, the portion of the second light beam in the fourth direction D transmits to the fourth collimating lens 314 and is collimated to form a fourth horizontal band-shaped light beam.
- the fourth aspheric cylindrical lens 324 finally disperses the fourth horizontal band-shaped light beam to form a fourth horizontal sector-shaped output beam having an angle greater than 90 degrees.
- the illumination of fourth horizontal sector-shaped output beam is uniformized by the fourth aspheric cylindrical lens 321 .
- each aspheric cylindrical lens of the laser level 100 disperses the laser beam emitted from the laser module 11 to form a horizontal sector-shaped output beam having an angle greater than 90 degrees.
- Four aspheric cylindrical lenses 321 , 322 , 323 and 324 together form a horizontal output beam in a circumferential area to thereby perform level indication along multi directions simultaneously. It is appreciated that the laser beam emitted from the laser module 11 is evenly dispersed by the four aspheric cylindrical lenses 321 , 322 , 323 and 324 to form four sector-shaped output beams in four different directions.
- the present invention provides three beam splitters 21 , 22 and 23 to split the laser beam emitted from the laser module 11 into four light beams along four different directions A, B, C and D as indicated in FIG. 2 . Then, the four light beams respectively transmit to four aspheric cylindrical lenses 321 , 322 , 323 and 324 and are dispersed to form four horizontal sector-shaped output beams each having an angle greater than 90 degrees. The four horizontal sector-shaped output beams together form an output beam in a circumferential area to perform level indication along multi directions simultaneously.
- the laser level 100 of the present invention has a simplified structure since there is no moveable mechanism. Further, in use, the laser level 100 is neither subject to vibration nor required connection to an external source of power.
- the type and the number of the beam splitters of the beam-splitting unit 20 can be changed according to the beam diffused angle of the beam-outgoing unit 30 .
- the beam diffused angle of the beam-outgoing unit 30 For example, if a single light beam splitted from the laser beam can be dispersed to form a sector-shaped output beam having an angle of 120 degrees, it is obvious that only two beam splitters are required to evenly split the laser beam emitted from the laser module 11 into three light beams.
Abstract
Description
- Relevant subject matter is disclosed in U.S. patent application Ser. No. ______ filed on May 5, 2004 with the same assignee and entitled as “SIDE BY SIDE LASER LEVEL DEVICE”.
- 1. Field of the Invention
- The present invention relates to a laser level, and particularly to a laser level capable of level indication along multi directions in a circumferential area simultaneously.
- 2. Description of Related Art
- In the construction industry, drawing or determining a distant horizontal or vertical line from a reference line is sometimes not easy to achieve in one step, especially for those desired lines located at different walls. Conventional methods for carrying out the line-drawing or line-determination operation can be performed by utilizing rulers, ink-string boxes, levelers, and so on as are well well-known in the art. However, these conventional methods may be tedious and difficult to achieve accurately, and may be subject to human error.
- Subsequently, a variety of survey tools employing lasers have been developed to determine level horizontal or plumb vertical planes for construction, surveying, remodeling, etc. For example, U.S. Pat. Nos. 3,771,876, 3,897,637, 4,333,242, 4,852,265, 4,904,081 and 4,912,851 illustrate various apparatuses utilizing laser technology for the construction industry. These and other similar devices utilize lasers to assist in leveling, aligning, plumbing or surveying operations.
- U.S. Pat. No. 3,771,876 is directed to a laser apparatus for producing a plane or conical optical reference surface. The device includes a pendulum hanging from a flexible suspending member, with the pendulum containing the light source so as to be self-leveling. A prism is used for reflecting the beam out of the device 90 degrees from the entry angle of the beam from the pendulum. The prism is mounted on a vertical axle which can be caused to be rotated by a motor, whereby a conical reference surface is produced. However, the rotation of the prism is easy to cause the laser apparatus to shake, thereby adversely affecting the accuracy of the laser apparatus. Further, since a motor is employed to drive the prism to rotate, the volume of the laser apparatus is inevitably increased and the manufacturing cost is also increased.
- In U.S. Pat. No. 3,897,637, there is disclosed a level tool utilizing a helium-neon laser for projecting a beam both vertically and horizontally. The device is not self-leveling and required manual leveling. It is rather large and required connection to an external source of power.
- In some applications, when there is a need to provide level indication along various directions in a circumferential area, multi level indications are conducted time after time. Obviously, it is time-consuming.
- Hence, an improved laser lever is required to overcome the disadvantages of the related art.
- Accordingly, a first object of the present invention is to provide a laser level capable of level indication along multi directions in a circumferential area simultaneously.
- A second object of the present invention is to provide a laser level having a simplified configuration and a low manufacturing cost.
- In order to achieve the objects set forth, a laser level in accordance with the present invention comprises a laser light source adapted to emit a laser beam, a beam-splitting unit comprising a first, a second and a third beam splitters, and a beam-outgoing unit. The first beam splitter splits the laser beam into two light beams along a first and a second directions. The second and the third beam splitters are respectively arranged in the first and the second directions to split the two light beams into four light beams along four different directions. The beam-outgoing unit disperses the four light beams to form four horizontal sector-shaped output beams. The four sector-shaped output beams together form an output beam having an angle approximately of 360 degrees.
- Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
-
FIG. 1 is a perspective view of a laser level in accordance with the present invention; and -
FIG. 2 is an optical diagram of the laser level. - Reference will now be made in detail to the preferred embodiment of the present invention.
- Referring to
FIG. 1 , alaser level 100 in accordance with the present invention comprises abase 50 and an optical system retained in thebase 50. The optical system comprises a beam-incoming unit 10, a beam-splittingunit 20 and a beam-outgoing unit 30. - The beam-
incoming unit 10 includes asemiconductor laser module 11 as a light source and a diverginglens 12. The diverginglens 12 is arranged in a position through which a laser beam emitted from thelaser module 11 extends. The laser beam is adjusted by the diverginglens 12 to have a predetermined angle and a substantially circular cross section. - The beam-
splitting unit 20 includes afirst beam splitter 21, asecond beam splitter 22 and athird beam splitter 23. These threebeam splitters third beam splitters - The beam-
outgoing unit 30 includes a first, a second, a third and a fourthcollimating lenses cylindrical lenses - Referring to
FIG. 2 in conjunction withFIG. 1 , thefirst beam splitter 21 is arranged in a position through which the laser beam extends. Thefirst beam splitter 21 is effective to split the laser beam into two simultaneous light beams along a first direction A and a second direction B perpendicular to the first direction A. The laser beam emitted from thelaser module 11 is spread through the diverginglens 12 to have a predetermined angle and then is directed to thefirst beam splitter 21. Thefirst beam splitter 21 transmits a portion of the laser beam providing a first light beam in the first direction A and reflects a portion of the laser beam to provide a second light beam in the second direction B. - The
third beam splitter 23 is adjacent thefirst beam splitter 21 and arranged in a position through which the first light beam extends. Thethird beam splitter 23 transmits a portion of the first light beam in the first direction A and reflects a portion of the first light beam in a third direction C perpendicular to the first direction. Then, the portion of the first light beam in the first direction A transmits to the firstcollimating lens 311 and is collimated to form a first horizontal band-shaped light beam. The first asphericcylindrical lens 321 finally disperses the first horizontal band-shaped light beam to form a first horizontal sector-shaped output beam having an angle greater than 90 degrees. In addition, the illumination of first horizontal sector-shaped output beam is uniformized by the first asphericcylindrical lens 321. - At the same time, the portion of the first light beam in the third direction C transmits to the third
collimating lens 313 and is collimated to form a third horizontal band-shaped light beam. The third asphericcylindrical lens 323 finally disperses the third horizontal band-shaped light beam to form a third horizontal sector-shaped output beam having an angle greater than 90 degrees. In addition, the illumination of third horizontal sector-shaped output beam is uniformized by the third asphericcylindrical lens 321. - The second light beam transmits in a manner similar to that of the first light beam described above. The
second beam splitter 22 is adjacent thefirst beam splitter 21 and arranged in a position through which the second light beam extends. Thesecond beam splitter 22 transmits a portion of the second light beam in the second direction B. Then, the portion of the second light beam in the second direction B transmits to thesecond collimating lens 312 and is collimated to form a second horizontal band-shaped light beam. The second asphericcylindrical lens 322 finally disperses the second horizontal band-shaped light beam to form a second horizontal sector-shaped output beam having an angle greater than 90 degrees. In addition, the illumination of second horizontal sector-shaped output beam is uniformized by the second asphericcylindrical lens 321. - At the same time, the
second beam splitter 22 reflects a portion of the second light beam in a fourth direction D perpendicular to the second direction B. Then, the portion of the second light beam in the fourth direction D transmits to thefourth collimating lens 314 and is collimated to form a fourth horizontal band-shaped light beam. The fourth asphericcylindrical lens 324 finally disperses the fourth horizontal band-shaped light beam to form a fourth horizontal sector-shaped output beam having an angle greater than 90 degrees. In addition, the illumination of fourth horizontal sector-shaped output beam is uniformized by the fourth asphericcylindrical lens 321. - As described above, each aspheric cylindrical lens of the
laser level 100 disperses the laser beam emitted from thelaser module 11 to form a horizontal sector-shaped output beam having an angle greater than 90 degrees. Four asphericcylindrical lenses laser module 11 is evenly dispersed by the four asphericcylindrical lenses - It is noted that the present invention provides three
beam splitters laser module 11 into four light beams along four different directions A, B, C and D as indicated inFIG. 2 . Then, the four light beams respectively transmit to four asphericcylindrical lenses laser level 100 of the present invention has a simplified structure since there is no moveable mechanism. Further, in use, thelaser level 100 is neither subject to vibration nor required connection to an external source of power. - It is understood that the type and the number of the beam splitters of the beam-splitting
unit 20 can be changed according to the beam diffused angle of the beam-outgoingunit 30. For example, if a single light beam splitted from the laser beam can be dispersed to form a sector-shaped output beam having an angle of 120 degrees, it is obvious that only two beam splitters are required to evenly split the laser beam emitted from thelaser module 11 into three light beams. - It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW093102244A TWI267629B (en) | 2004-01-30 | 2004-01-30 | Laser level device |
TW093102244 | 2004-01-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050166408A1 true US20050166408A1 (en) | 2005-08-04 |
US6931737B1 US6931737B1 (en) | 2005-08-23 |
Family
ID=34806376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/863,225 Expired - Fee Related US6931737B1 (en) | 2004-01-30 | 2004-06-09 | Laser level device |
Country Status (2)
Country | Link |
---|---|
US (1) | US6931737B1 (en) |
TW (1) | TWI267629B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070147930A1 (en) * | 2005-12-27 | 2007-06-28 | Sogra Nishath | Light guides to assist in movement of a handheld printing device |
EP2169349A3 (en) * | 2008-09-30 | 2010-08-11 | Alexey V. Gulunov | Optical block for mapping using a laser beam |
US20160313121A1 (en) * | 2014-01-23 | 2016-10-27 | Jayson Hill | Adjustable laser leveling device with distance measuring lasers and self-leveling lasers and related method |
US20170293020A1 (en) * | 2016-04-11 | 2017-10-12 | Electronics And Telecommunications Research Institute | Scanning device and operating method thereof |
CN109631865A (en) * | 2019-01-20 | 2019-04-16 | 佛山隆深机器人有限公司 | A kind of wireless laser positioning system |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005079480A2 (en) * | 2004-02-19 | 2005-09-01 | Mindstorm Technologies Llc | Multiple laser laser level |
US7178250B2 (en) * | 2004-07-21 | 2007-02-20 | Irwin Industrial Tool Company | Intersecting laser line generating device |
TWI311391B (en) * | 2005-04-08 | 2009-06-21 | Quarton Inc | Laser module for projecting a linear laser beam |
US7328516B2 (en) * | 2005-08-05 | 2008-02-12 | Irwin Industrial Tool Company | Laser level |
WO2009059133A1 (en) * | 2007-11-02 | 2009-05-07 | Robert Bosch Tool Corporation | Green beam laser level device |
US9127935B2 (en) * | 2012-01-04 | 2015-09-08 | Chris Olexa | Laser centering tool for surface areas |
US9303990B2 (en) * | 2014-04-11 | 2016-04-05 | Black & Decker Inc. | Laser line generating device |
DE102019216724A1 (en) * | 2019-10-30 | 2021-05-06 | Robert Bosch Gmbh | Leveling laser and optical projection lens |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US433242A (en) * | 1890-07-29 | Tufted fabric and method of forming the same | ||
US3771876A (en) * | 1971-11-17 | 1973-11-13 | E Ljungdahl | Producing a plane or conical optical reference surface |
US3897637A (en) * | 1974-03-18 | 1975-08-05 | Robert Genho | Laser level and square |
US4770480A (en) * | 1986-05-12 | 1988-09-13 | Spectra-Physics, Inc. | Apparatus and method for providing multiple reference laser beams |
US4852265A (en) * | 1988-04-08 | 1989-08-01 | Spectra-Physics, Inc. | Level/plumb indicator with tilt compensation |
US4904081A (en) * | 1987-11-24 | 1990-02-27 | Kenji Miyahara | Surveying apparatus |
US4912851A (en) * | 1988-04-08 | 1990-04-03 | Spectra-Physics, Inc. | Level/plumb indicator with tilt compensation |
US5218770A (en) * | 1990-11-27 | 1993-06-15 | Asahi Seimitsu Kabushiki Kaisha | Surveying machine for construction work |
US5539990A (en) * | 1995-05-30 | 1996-07-30 | Le; Mike | Three-dimensional optical levelling, plumbing and angle-calibrating instrument |
US6539638B1 (en) * | 2000-04-27 | 2003-04-01 | Victor Pelletier | Line projecting device |
US6598304B2 (en) * | 1998-01-08 | 2003-07-29 | Paul Akers | Laser leveling system, apparatus and method for building construction |
US6603546B1 (en) * | 2000-07-21 | 2003-08-05 | I.S.S. (Usa) Inc. | Rapid high throughput spectrometer and method |
US6618950B2 (en) * | 2001-08-10 | 2003-09-16 | Quarton, Inc | Projection apparatus for demarcation |
US6694629B2 (en) * | 2002-02-27 | 2004-02-24 | Trimble Navigation Llc | Laser projector for producing intersecting lines on a surface |
US6792685B1 (en) * | 2003-03-06 | 2004-09-21 | National University Of Singapore | Stabilized laser plumb |
US20050005462A1 (en) * | 2003-07-11 | 2005-01-13 | Zircon Corporation | Modular laser layout system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333242A (en) | 1979-05-07 | 1982-06-08 | Lasertron Company | Construction laser |
-
2004
- 2004-01-30 TW TW093102244A patent/TWI267629B/en not_active IP Right Cessation
- 2004-06-09 US US10/863,225 patent/US6931737B1/en not_active Expired - Fee Related
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US433242A (en) * | 1890-07-29 | Tufted fabric and method of forming the same | ||
US3771876A (en) * | 1971-11-17 | 1973-11-13 | E Ljungdahl | Producing a plane or conical optical reference surface |
US3897637A (en) * | 1974-03-18 | 1975-08-05 | Robert Genho | Laser level and square |
US4770480A (en) * | 1986-05-12 | 1988-09-13 | Spectra-Physics, Inc. | Apparatus and method for providing multiple reference laser beams |
US4904081A (en) * | 1987-11-24 | 1990-02-27 | Kenji Miyahara | Surveying apparatus |
US4852265A (en) * | 1988-04-08 | 1989-08-01 | Spectra-Physics, Inc. | Level/plumb indicator with tilt compensation |
US4912851A (en) * | 1988-04-08 | 1990-04-03 | Spectra-Physics, Inc. | Level/plumb indicator with tilt compensation |
US5218770A (en) * | 1990-11-27 | 1993-06-15 | Asahi Seimitsu Kabushiki Kaisha | Surveying machine for construction work |
US5539990A (en) * | 1995-05-30 | 1996-07-30 | Le; Mike | Three-dimensional optical levelling, plumbing and angle-calibrating instrument |
US6598304B2 (en) * | 1998-01-08 | 2003-07-29 | Paul Akers | Laser leveling system, apparatus and method for building construction |
US6539638B1 (en) * | 2000-04-27 | 2003-04-01 | Victor Pelletier | Line projecting device |
US6603546B1 (en) * | 2000-07-21 | 2003-08-05 | I.S.S. (Usa) Inc. | Rapid high throughput spectrometer and method |
US6618950B2 (en) * | 2001-08-10 | 2003-09-16 | Quarton, Inc | Projection apparatus for demarcation |
US6694629B2 (en) * | 2002-02-27 | 2004-02-24 | Trimble Navigation Llc | Laser projector for producing intersecting lines on a surface |
US6792685B1 (en) * | 2003-03-06 | 2004-09-21 | National University Of Singapore | Stabilized laser plumb |
US20050005462A1 (en) * | 2003-07-11 | 2005-01-13 | Zircon Corporation | Modular laser layout system |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070147930A1 (en) * | 2005-12-27 | 2007-06-28 | Sogra Nishath | Light guides to assist in movement of a handheld printing device |
EP2169349A3 (en) * | 2008-09-30 | 2010-08-11 | Alexey V. Gulunov | Optical block for mapping using a laser beam |
DE202009018473U1 (en) | 2008-09-30 | 2011-12-06 | Alexey V. Gulunov | Optical block for scanning with a laser beam |
US20160313121A1 (en) * | 2014-01-23 | 2016-10-27 | Jayson Hill | Adjustable laser leveling device with distance measuring lasers and self-leveling lasers and related method |
US20170052026A1 (en) * | 2014-01-23 | 2017-02-23 | Jayson Hill | Method and device for project layout using level laser lines projected onto work surface |
US9846034B2 (en) * | 2014-01-23 | 2017-12-19 | Sure Hang, Llc | Adjustable laser leveling device with distance measuring lasers and self-leveling lasers and related method |
US9863768B2 (en) * | 2014-01-23 | 2018-01-09 | Jayson Hill | Method and device for project layout using level laser lines projected onto work surface |
US20170293020A1 (en) * | 2016-04-11 | 2017-10-12 | Electronics And Telecommunications Research Institute | Scanning device and operating method thereof |
CN109631865A (en) * | 2019-01-20 | 2019-04-16 | 佛山隆深机器人有限公司 | A kind of wireless laser positioning system |
Also Published As
Publication number | Publication date |
---|---|
TW200525129A (en) | 2005-08-01 |
TWI267629B (en) | 2006-12-01 |
US6931737B1 (en) | 2005-08-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6931737B1 (en) | Laser level device | |
US6694629B2 (en) | Laser projector for producing intersecting lines on a surface | |
US6675489B2 (en) | Laser sighting device | |
US4758729A (en) | Apparatus and method for measuring the included angle of a reflective cone | |
US5617202A (en) | Diode laser co-linear and intersecting light beam generator | |
US6005719A (en) | Construction laser accessory for generating aligned spots or lines | |
US5864956A (en) | Level line and limb line combination | |
US5500524A (en) | Diode laser co-linear light beam generator | |
US6327090B1 (en) | Multiple laser beam generation | |
JP4441561B2 (en) | Optical device | |
US8407904B2 (en) | Rotary laser beam emitter | |
US20060176482A1 (en) | Laser alignment apparatus | |
CN106772320A (en) | A kind of first successive step vertical means of the transmitting beam direction of laser radar | |
US6892464B2 (en) | Laser sighting device | |
US8542358B2 (en) | Optical calibration and testing device for machine tools | |
US20070204474A1 (en) | Laser level | |
JP2001165616A (en) | Laser length measuring device and laser length measuring method | |
US6909551B1 (en) | Side by side laser level device | |
US7266897B2 (en) | Self-aligning, self plumbing baseline instrument | |
JP3141895U (en) | measurement tool | |
JP3128325U (en) | Multi-surface laser level | |
JP2002181545A (en) | Target device for surveying machine | |
JP4508433B2 (en) | Method and apparatus for adjusting compound eye camera | |
US7508587B2 (en) | Laser level | |
JP3705863B2 (en) | Height measuring device and height measuring method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ASIA OPTICAL CO., INC., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LIAO, CHEN CHENG;REEL/FRAME:015449/0343 Effective date: 20040520 |
|
REFU | Refund |
Free format text: REFUND - PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: R1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: REFUND - SURCHARGE FOR LATE PAYMENT, LARGE ENTITY (ORIGINAL EVENT CODE: R1554); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20130823 |