Surveying instrument

Abstract

To provide a surveying instrument that reduces the size of an optical system and the instrument as a whole.SOLUTION: A surveying instrument comprises: a distance measuring section having a light emitting element 28 that emits distance measuring light and a light receiving element that receives the reflected distance measuring light from an object to be measured; rotary deflection sections 15, 23, 24 that irradiate the distance measuring light; a vertical rotary drive section 13 that rotates the rotary deflection section in the vertical direction via a hollow vertical rotary shaft 11; a base section 5 on which the rotary deflection section is provided; a horizontal rotary drive section 8 that rotates the base section in the horizontal direction; and a calculation control section 17 that calculates the distance to the object to be measured based on the result of receiving the reflected distance measuring light to the light receiving element. The rotary deflection section has a light projecting deflection section formed in the center and deflecting the distance measuring light at a right angle, and a light receiving deflection section formed outside the center and deflecting the reflected distance measuring light at a right angle, and is configured such that the distance measurement light passes through the vertical rotation axis and enters the light projecting deflection section, and the reflected distance measurement light enters the light receiving deflection section and is deflected in the opposite direction to the light emitting element.SELECTED DRAWING: Figure 1

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