Importance

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Abstract

In a survey system in which guide light is emitted from the side of a target, and, on the side of a surveying instrument, a telescope is directed roughly toward the target by receiving the guide light so as to shorten the time required for automatic collimation, the automatic collimation of the surveying instrument can be reliably performed by removing guide light reflected by reflective objects such as windowpanes. The target has a guide light remitter that emits guide light The guide light transmitter includes a light source, a polarizing plate that changes light emitted from this light source into linearly polarized light, and a quarter-wave plate that changes this nearly polarized light into circularly polarized guide light The surveying instrument includes a direction detector and a collimation preparing means. The direction detector includes a quarter-wave plate and a polarizing plate.

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First Claim