Measuring instrument

1. A surveying instrument comprising: a distance measuring unit which includes a light emitting element for emitting a distance measuring light, a distance measuring light projecting unit for projecting said distance measuring light, a light receiving unit for receiving a reflected distance measuring light and a photodetector for receiving said reflected distance measuring light and producing a light receiving signal, and which performs a distance measurement of an object to be measured based on said light receiving signal from said photodetector,

an optical axis deflecting unit provided on a distance measuring optical axis and for deflecting said distance measuring optical axis,

a projecting direction detecting unit for detecting a deflection angle of said distance measuring optical axis and

an arithmetic control component for controlling a deflecting action of said optical axis deflecting unit and a distance measuring action of said distance measuring unit,

wherein said optical axis deflecting unit comprises a pair of optical prisms capable of rotating with said distance measuring optical axis as a center and motors which individually and independently rotate said optical prisms,

and wherein said arithmetic control component is configured to control a deflection by said optical axis deflecting unit by controlling rotating directions, rotating speeds, and a rotation ratio of said pair of optical prisms, to perform a two-dimensional scanning of said distance measuring light, to perform a distance measurement of when said light receiving signal is detected during said two-dimensional scanning, to measure a horizontal angle and a vertical angle of said object to be measured based on a deflection angle detected by said projecting direction detecting unit of when said light receiving signal is detected, and to obtain three-dimensional coordinates of said object to be measured based on a distance value from said distance measuring unit, and said horizontal angle and said vertical angle.

2. The surveying instrument according to claim 1 , wherein said arithmetic control component is further configured to determine a position of said object to be measured based on a light receiving intensity of said distance measuring unit.

3. The surveying instrument according to claim 2 , further comprising an image pickup unit and a display module which also serves as a touch panel, wherein an image acquired by said image pickup unit is displayed on said display module, and a point as touched on said display module is set as a center of said two-dimensional scanning by said distance measuring light.

4. The surveying instrument according to claim 2 , further comprising an image pickup unit, wherein said arithmetic control component is configured to detect a position of said object to be measured in an image acquired by said image pickup unit and to perform said two-dimensional scanning by said distance measuring light with the position as detected as a center.

5. The surveying instrument according to claim 1 , wherein said two-dimensional scanning is a scanning according to a predetermined scanning pattern, and said scanning pattern has an intersection point at which a forward path and a return path intersect, and a distance measurement and a measurement of a horizontal angle and a vertical angle are performed at a time when horizontal angles of two light receiving signals produced by the photodetector when scanning on said forward path and said return path approximately coincide with each other and vertical angles of the two light receiving signals produced by the photodetector when scanning on said forward path and said return path approximately coincide with each other.

6. The surveying instrument according to claim 3 , wherein said arithmetic control component is configured to move said scanning pattern in at least one of a horizontal direction and a vertical direction and to perform a search of said object to be measured while carrying out a scanning according to said scanning pattern.

7. The surveying instrument according to claim 6 , further comprising an image pickup unit and a display module which also serves as a touch panel, wherein an image acquired by said image pickup unit is displayed on said display module, and a point as touched on said display module is set as a center of said two-dimensional scanning by said distance measuring light.

8. The surveying instrument according to claim 6 , further comprising an image pickup unit, wherein said arithmetic control component is configured to detect a position of said object to be measured in an image acquired by said image pickup unit and to perform said two-dimensional scanning by said distance measuring light with the position as detected as a center.

9. The surveying instrument according to claim 5 , further comprising an image pickup unit and a display module which also serves as a touch panel, wherein an image acquired by said image pickup unit is displayed on said display module, and a point as touched on said display module is set as a center of said two-dimensional scanning by said distance measuring light.

10. The surveying instrument according to claim 5 , further comprising an image pickup unit, wherein said arithmetic control component is configured to detect a position of said object to be measured in an image acquired by said image pickup unit and to perform said two-dimensional scanning by said distance measuring light with the position as detected as a center.

11. The surveying instrument according to claim 1 , wherein a beam shape expanding optical component is provided in said distance measuring light projecting unit, and a luminous flux section of said distance measuring light performing a scanning is expanded.

12. The surveying instrument according to claim 11 , wherein said beam shape expanding optical component is a cylinder lens, and said luminous flux section of said distance measuring light is expanded only in one direction.

13. The surveying instrument according to claim 11 , further comprising an image pickup unit and a display module which also serves as a touch panel, wherein an image acquired by said image pickup unit is displayed on said display module, and a point as touched on said display module is set as a center of said two-dimensional scanning by said distance measuring light.

14. The surveying instrument according to claim 11 , further comprising an image pickup unit, wherein said arithmetic control component is configured to detect a position of said object to be measured in an image acquired by said image pickup unit and to perform said two-dimensional scanning by said distance measuring light with the position as detected as a center.

15. The surveying instrument according to claim 1 , further comprising an attitude detecting unit capable of detecting a tilt angle and a tilting direction, wherein said arithmetic control component corrects the distance measurement, the horizontal angle, and the vertical angle based on a detection result of said attitude detecting unit.

16. The surveying instrument according to claim 1 , further comprising an image pickup unit and a display module which also serves as a touch panel, wherein an image acquired by said image pickup unit is displayed on said display module, and a point as touched on said display module is set as a center of said two-dimensional scanning by said distance measuring light.

17. The surveying instrument according to claim 1 , further comprising an image pickup unit, wherein said arithmetic control component is configured to detect a position of said object to be measured in an image acquired by said image pickup unit and to perform said two-dimensional scanning by said distance measuring light with the position as detected as a center.