Claims
- 1. A laser leveling device, comprising a light emitting unit for irradiating a laser beam, a rotating unit for rotating said laser beam from said light emitting unit for scanning and for forming a reference plane, and a slit plate positioned so that said laser beam from said rotating unit crosses said slit plate, said slit plate having a predetermined width and having a slit hole for allowing said laser beam to pass so that a spot or a segment is formed.
- 2. A laser leveling device according to claim 1, wherein said slit plate is positioned in a downward direction so that a laser spot is formed in a vertical downward direction when a vertical reference plane is formed by said rotating unit.
- 3. A laser leveling device according to claim 2, wherein said slit plate can enter and exit from a position where the laser beam from said rotating unit crosses said slit plate.
- 4. A laser leveling device according to claim 1, wherein said slit plate is positioned in an upward and downward direction so that a laser spot is formed in vertical upward and downward directions when a vertical reference plane is formed by said rotating unit.
- 5. A laser leveling device according to claim 4, wherein said slit plate can enter and exit from a position where the laser beam from said rotating unit crosses said slit plate.
- 6. A laser leveling device according to claim 1, wherein said slit plate can enter and exit from a position where the laser beam from said rotating unit crosses said slit plate.
- 7. A laser leveling device according to claim 1, wherein said rotating unit has an encoder for detecting a rotating angle of said rotating unit and said scanning of said laser beam is controlled within a given range and a given position so that said laser beam from said rotating unit crosses said slit plate in response to the detection by said encoder.
Priority Claims (2)
Number |
Date |
Country |
Kind |
7-18663 |
Jan 1995 |
JPX |
|
7-53374 |
Feb 1995 |
JPX |
|
Parent Case Info
This application is a division of Ser. No. 08/585,277 filed Jan. 11, 1996 now U.S. Pat. No. 5,819,424.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1366877 |
Jun 1964 |
FRX |
9013002 |
Nov 1990 |
WOX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
585277 |
Jan 1996 |
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