Laser survey instrument

• US 20010025425A1
• Filed: 03/21/2001
• Published: 10/04/2001
• Est. Priority Date: 03/29/2000
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Topcon
• Original Assignee: Kabushiki Kaisha Topcon
• Inventors: Yamazaki, Takaaki, Haijima, Yasuhito
• Granted Patent: US 6,688,009 B2
• Time in Patent Office: Days
• US Class Current: 33/281
• CPC Class Codes: G01C 15/004 Reference lines, planes or sectors

Abstract

A laser survey instrument, comprising a laser projector for projecting a laser beam onto a plane by rotary irradiation, a tilting unit for tilting the laser projector in two directions running perpendicularly each other and a tilt setting unit for setting a desired tilt angle for the laser projector at least in one direction, wherein the tilt setting unit comprises a tilt sensor for detecting a horizontal position and an angle detector for detecting an angle between the tilt sensor and the laser projector.

Claims

1. A laser survey instrument, comprising a laser projector for projecting a laser beam onto a plane by rotary irradiation, a tilting unit for tilting said laser projector in two directions running perpendicularly each other and a tilt setting unit for setting a desired tilt angle for said laser projector at least in one direction, wherein said tilt setting unit comprises a tilt sensor for detecting a horizontal position and an angle detector for detecting an angle between said tilt sensor and said laser projector.

2. A laser survey instrument according to

claim 1

, wherein the tilting unit can tilt the laser projector in two directions running perpendicularly each other and the tilt setting unit is provided so as to set tilting only in one direction.

3. A laser survey instrument according to

claim 2

, wherein the tilting unit and the tilt setting unit are provided so as to set tilting in two directions running perpendicularly to each other, said tilting unit comprises a first tilting unit and a second tilting unit, and said tilt setting unit comprises a first tilt setting unit and a second tilt setting unit.

4. A laser survey instrument according to

claim 2

, wherein the tilting unit comprises a first tilting unit and a second tilting unit provided for two directions crossing perpendicularly each other, and the tilt setting unit is provided on one of said first tilting unit and said second tilting unit, and the tilt sensor for detecting the horizontal position is provided on the other.